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EP1577436A1 - Roofing materials - Google Patents

Roofing materials Download PDF

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Publication number
EP1577436A1
EP1577436A1 EP20050003615 EP05003615A EP1577436A1 EP 1577436 A1 EP1577436 A1 EP 1577436A1 EP 20050003615 EP20050003615 EP 20050003615 EP 05003615 A EP05003615 A EP 05003615A EP 1577436 A1 EP1577436 A1 EP 1577436A1
Authority
EP
European Patent Office
Prior art keywords
fibers
binder
aluminum hydroxide
mixture
roofing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20050003615
Other languages
German (de)
French (fr)
Inventor
Manfred Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1577436A1 publication Critical patent/EP1577436A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N5/00Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209Inorganic fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209Inorganic fibres
    • D04H1/4218Glass fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209Inorganic fibres
    • D04H1/4242Carbon fibres
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425Cellulose series
    • D04H1/4258Regenerated cellulose series
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4266Natural fibres not provided for in group D04H1/425
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282Addition polymers
    • D04H1/4291Olefin series
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282Addition polymers
    • D04H1/43Acrylonitrile series
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326Condensation or reaction polymers
    • D04H1/4334Polyamides
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326Condensation or reaction polymers
    • D04H1/435Polyesters
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/593Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives to layered webs
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/645Impregnation followed by a solidification process
    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/645Impregnation followed by a solidification process
    • D04H1/65Impregnation followed by a solidification process using mixed or composite fibres
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06NWALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2041Two or more non-extruded coatings or impregnations
    • Y10T442/2049Each major face of the fabric has at least one coating or impregnation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2762Coated or impregnated natural fiber fabric [e.g., cotton, wool, silk, linen, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861Coated or impregnated synthetic organic fiber fabric

Definitions

  • the invention relates to roofing membranes of bonded fiber webs, with both sides Bitumen are coated.
  • nonwoven fabrics which solidified with the aid of a binder are made of a mixture of an emulsion polymer and an inert reinforcing Filler exists.
  • the polymer is purchased in amounts of from 2 to 400% by weight applied to the nonwoven fabric, and the filler in amounts of 5 to 80 wt.%.
  • fillers are clay, calcium carbonate, talc, precipitated barium sulfate, alumina hydrate, Pyrite, gypsum, magnesium silicate, magnesium carbonate, mica and silicon dioxide called. These fillers essentially serve to reduce the cost of lower bound nonwoven fabric.
  • the nonwovens are used for example in the clothing sector, as cleaning wipes, for feeding out packages, as a filter and Packings and seals used by machinery.
  • EP-A-0 442 370 describes nonwovens which as a binder are a polymer containing carboxyl groups and as an aqueous dispersion having a middle Particle size of 20 to 400 nm is present and that with the help of magnesium, calcium or zinc in the form of oxides, hydroxides, carbonates or bicarbonates, and whose mixtures are crosslinked.
  • the binder may optionally additionally a resole or an aminoplast.
  • the bonded fiber webs are in bituminized Form used as roofing membranes.
  • aqueous binders for the production of consolidated fiber webs, in particular nonwovens made of glass fibers, are known from EP-A-0 583 086.
  • the binders contain a polycarboxylic acid having at least two carboxyl or Anhydride groups, at least one polyol and a phosphorus compound as a reaction accelerator.
  • such binder mixtures are used used for solidifying cellulose substrates.
  • WO-A-97/31036 discloses formaldehyde-free, aqueous binders for nonwoven fabrics, in particular for nonwovens of glass fibers, known.
  • the binders contain (A) Polymer containing from 5 to 100% by weight of an ethylenically unsaturated acid anhydride or an ethylenically unsaturated dicarboxylic acid, its carboxyl groups can form an anhydride group, and (B) an alkanolamine having at least two hydroxyl groups and a phosphorus compound as a reaction accelerator. From the bonded fiber webs, for example, roofing membranes, insulating materials, Flooring and scourer made.
  • DE-A-196 21 573 discloses thermally curable, aqueous compositions known that a hydroxyalkylated polyamine and a radical polymerization containing from 5 to 100 wt .-% of at least one ethylenic polymer unsaturated mono- or dicarboxylic acid is constructed. Such mixtures are et al used as a binder for nonwoven fabrics.
  • EP-A-0 976 866 discloses textile fabrics which are a structure of fibers comprise, which are interconnected by means of a polymeric binder.
  • the fabric also contains 1 to 20% by weight of an oxide and / or Hydroxides of Al, B, Si, Mg, Ti and / or Zn in a colloidally disperse distribution and a Sulfosuccinate or sulfosuccinamate as wetting agent.
  • the additives improve the Water absorption properties of the fabrics, wherein the hydrophilicity of the Sheet is preserved even after repeated washing.
  • the present invention has for its object to provide roofing membranes available provide a bonded fiber fleece and the opposite roofing membranes have improved heat resistance and dry tensile strength.
  • the object is achieved with roof membranes based on bonded Non-woven fabrics, which are coated on both sides with bitumen, if the non-woven fabric with a Mixture of at least one polymeric binder and an aluminum hydroxide is solidified.
  • the non-woven fabrics may consist of natural and / or synthetic fibers.
  • natural fibers are cellulose fibers of different origin such as pulp and rayon and cotton fibers, hemp, jute, sisal and wood, wool or cotton fibers Viscose and mixtures of at least two of the fiber types mentioned.
  • Prefers used fibers from this group are fibers of jute, sisal and wood.
  • synthetic fibers are polyester, polyamide, polypropylene, polyethylene, Polyacrylonitrile and polyvinyl chloride fibers and carbon fibers, glass fibers, Ceramic fibers and mineral fibers and mixtures of at least two of the above Fiber types.
  • Preferably used for the production of bonded fiber webs Polyester fibers and mixtures of polyester fibers and glass fibers.
  • polyester fibers can also be obtained from recycled material by melt spinning and be used for the production of a carrier fleece.
  • the nonwovens may e.g. out Staple fibers or spun fibers and mixtures of these types of fibers exist. They are known mechanically by needling or hydroentanglement a wet-laid or non-woven fabric and by chemical solidification with made of polymeric binders.
  • For the production of bonded fiber webs is for example, at least one binder in an amount of 0.5 to 30, preferably 15 to 20 wt .-%, based on the solids content of the binder and sheet-like Fiber structures such as nonwovens, used.
  • the binder serves to solidify the Fleeces. It can, for example, by spraying, dipping, impregnating or patting or by treating the fiber structure with a foam.
  • the nonwovens for example have a basis weight of 50 to 2000 g / m 2 , preferably from 50 to 1600 g / m 2 . In most cases, the basis weight of the non-bonded nonwovens is 80 to 300 g / m 2 .
  • thermally curable binders for the consolidation of fiber webs in the following Publications described herein by reference to the disclosure of the present invention: US 4 076 917, EP-A-0 445 578, EP-A-0 583 086, EP-A-0 651 088, WO-A-97/31036, page 4, line 12 to page 12, line 14, WO-A-97/31059, page 2, line 22 to page 12, line 5, WO-A-97/31060, page 3, line 8 to page 12, line 36, DE-A-199 49 591, page 3, line 5 to page 7, line 38, WO-A-01/27163, Page 5, line 34 to page 22, line 2 as well as those known from DE-A-199 17 965 radiation-curable binder.
  • thermosetting resins Base of phenol and formaldehyde, melamine-formaldehyde resins, urea-formaldehyde resins, One- and two-component systems based on epoxy resins or polyurethanes, polyacrylates, polymethacrylates, polyvinyl acetates, styrene-acrylate copolymer dispersions, Styrene-methacrylate copolymer dispersions, styrene-butadiene (meth) acrylic acid copolymer dispersions as well as mixtures of the mentioned dispersions with a mixture of a polycarboxylic acid and a polyhydric alcohol as a crosslinking component.
  • thermosetting resins Base of phenol and formaldehyde, melamine-formaldehyde resins, urea-formaldehyde resins, One- and two-component systems based on epoxy resins or polyurethanes, polyacrylates, polymethacrylates, polyvin
  • Such mixtures are about 40 to 60 wt .-% solids aqueous solutions of a copolymer of 80 wt .-% acrylic acid and 20 wt .-% maleic acid of molecular weight M w from 15 000 to 900 000 in combination with triethanolamine or aqueous solutions of a copolymer of 55% by weight of acrylic acid and 45% by weight of maleic acid in combination with triethanolamine.
  • These binders may optionally contain an esterification catalyst and / or a bound phosphorus-containing compound such as hypophosphorous acid as a reaction accelerator.
  • Polycarboxylic acids, polyhydric alcohols, alkanolamines and polyhydric amines are preferably used in amounts such that the number of acid function of the total number of alcoholic hydroxyl and amine functions is equivalent, see. EP-A-0 445 578.
  • binders which consist of an aqueous solution of a polycarboxylic acid (homopolymer or copolymer), preferably with a molecular weight M w of 10,000 or lower and a polyol, such as triethanolamine, and in which the ratio of the equivalents of Hydroxyl groups to equivalents of carboxyl groups in the range of 0.4: 1 to 1.0: 1, cf. EP-A-0 990 727.
  • binders containing a polymer having carboxyl groups and is present as an aqueous dispersion having an average particle size of 20 to 400 nm and with the help of magnesium, calcium or zinc in the form of oxides, hydroxides, Carbonates or bicarbonates and mixtures thereof is crosslinked.
  • Binders may optionally additionally contain a phenol-formaldehyde condensate, a melamine-formaldehyde resin or a urea-formaldehyde resin.
  • the polymeric binder used is preferably an aqueous dispersion of a thermally crosslinkable copolymer of acrylic acid esters, styrene and acrylonitrile A, which is available under Acronal® S 888 S from BASF Aktiengesellschaft.
  • a thermally crosslinkable copolymer from acrylic acid esters, styrene and acrylonitrile in combination with a urea-formaldehyde resin and / or a melamine-formaldehyde resin Such mixtures contain, for example, 4 to 20, preferably 6 to 16 wt.% Of at least one Resin.
  • Acrodur® DS 3558 X is a formaldehyde-free binder for fibers and granular materials. It consists of an aqueous styrene-acrylate dispersion, those with a polycarboxylic acid and a polyhydric alcohol as the crosslinking component is modified. It already cross-links at a temperature of 130 ° C. However To achieve high production speeds, the crosslinking is preferred at temperatures of 180 to 200 ° C through.
  • Acrodur® 950 L acts as a colorless to slightly yellowish, clear, aqueous solution of a modified polycarboxylic acid with a polyhydric alcohol as a crosslinking component is commercially available. It cross-links at drying temperatures from about 160 to 180 ° C. To achieve a high degree of crosslinking, is recommended the production speed depending on curing time and Optimize crosslinking temperature.
  • the binder used is preferably thermally low-formaldehyde or formaldehyde-free hardenable products.
  • formaldehydarm should in the present context be understood that the binder does not have significant amounts of free Contain formaldehyde and that also when drying or curing with the binders treated materials did not release significant amounts of formaldehyde become.
  • such binders contain ⁇ 100 ppm formaldehyde.
  • formaldehyde-free binders containing at least one polycarboxylic acid and at least one polyhydric alcohol and / or alkanolamine or contain polyvalent amine.
  • Compositions containing these binders may optionally contain further formaldehyde-free binders, e.g. polyacrylates, sold under the trademark Acronal® by BASF Aktiengesellschaft become.
  • curable binders known for bonding nonwoven fabrics and to which reference is made above can be used as a binder for nonwoven fabrics.
  • mixtures of at least one curable binder and at least one other binder are also possible.
  • the invention uses a mixture of a polymeric binder and at least one aluminum hydroxide.
  • the mixture contains, for example, per 100 parts by weight of a polymeric binder (calculated 100%) 10 to 100, preferably 15 to 50 parts by weight of aluminum hydroxide (calculated 100%).
  • aluminum hydroxide for example, come hydrargillite ( ⁇ -Al (OH) 3 ), bayerite ( ⁇ -Al (OH) 3 ) Nordstrandit ( ⁇ -Al (OH) 3 ), and oxide hydroxides such as boehmite ( ⁇ -AlO (OH)) and Diaspor ( ⁇ -AlO (OH)) and mixtures of these aluminum hydroxides into consideration.
  • the mean grain diameter of the aluminum hydroxides is for example in the range of 0.5 to 50 microns, preferably 0.9 to 5 microns. It is of course possible to use a mixture of different aluminum hydroxides.
  • solidify laid nonwovens they are treated, for example, with a mixture from a polymeric binder and an aluminum hydroxide or first treats a nonwoven with a binder, optionally it dries and then applies the aluminum hydroxide and heats the thus treated nonwoven for solidification to a temperature in the range of 180 to 230 ° C. But you can too first apply the aluminum compound and then the polymeric binder and then dry the impregnated web and then crosslink the binder.
  • the nonwoven webs impregnated with a binder become solidified to temperatures in the range of 180 to 230 ° C, preferably 190 to 210 ° C heated.
  • the duration The heating depends mainly on the temperature, the water content and the respective fiber from which the fleece is made. Usually you dry with them
  • Nonwovens impregnated or coated with at least one binder are 0.5 to 5, preferably 1.3 to 3 minutes at a temperature in the above-indicated temperature range.
  • water vapor initially escapes, simultaneously with it or subsequently the thermally curable Blend agent is crosslinked.
  • the invention also provides the use of bonded fiber webs, with a mixture of at least one polymeric binder and at least solidified aluminum hydroxide, as a carrier material for bitumin Liste roofing membranes.
  • the roofing membranes are obtained by solidifying the ones described above Nonwovens coated with bitumen on both sides or impregnated. For example, you lead a web of a suitable nonwoven by a bitumen melt and presses the thus impregnated web from. This process can be on or off be repeated several times.
  • the bitumen application, based on the consolidated nonwoven, is for example 1000 to 3500, preferably 1700 to 2800 wt .-%.
  • the roofing membranes also include composites of nonwovens that are made with a mixture of at least a polymeric binder and at least one aluminum hydroxide solidified are.
  • Such composites are obtained if, for example, two each with Bitumen coated nonwovens welded together and optionally one Fleece used as an intermediate layer, which is a mixture of at least one polymeric Binders and at least one aluminum hydroxide is solidified.
  • the roofing membranes of the invention have over the known roofing membranes Surprisingly, a higher heat resistance and a higher breaking strength. They are also flame-resistant, they are cheaper than roofing membranes, as a carrier fleece a solidified exclusively with a polymeric binder Fleece included.
  • a carrier web having a weight per unit area of 150 g / m 2 was impregnated in each case with the binder mixtures indicated in the table.
  • the order of polymeric binder and aluminum hydroxide was always 20%, based on the solids of the binder mixture and on the dry nonwoven fabric.
  • the liquor concentration of the binder preparations was adjusted to 10% in each case.
  • the impregnated nonwovens were dried for 3 minutes at a temperature of 200 ° C. Thereafter, it was determined the breaking strength of the bonded nonwovens at room temperature according to DIN 52 123 and the heat resistance at 200 ° C according to DIN 18 192 with a weight load of 4 kg. The results obtained are shown in the table as well as the results of the comparative examples described below.
  • Example 1 was repeated with the sole exception that the polymeric binder used without further additive.
  • Example 2 was repeated with the sole exception that instead of aluminum hydroxide now used 10 parts of calcium carbonate.
  • Example 2 was repeated with the sole exception that 10 parts of kaolin were used instead of aluminum hydroxide.

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Abstract

Roofing materials (I) comprises bound non-woven fibers (A) (bilaterally coated with bitumen), where the fibers are hardened in a mixture containing a polymer binder and an aluminum hydroxide.

Description

Die Erfindung betrifft Dachbahnen aus gebundenen Faservliesen, die beidseitig mit Bitumen beschichtet sind.The invention relates to roofing membranes of bonded fiber webs, with both sides Bitumen are coated.

Aus der DE-A-27 42 208 sind Faservliese bekannt, die mit Hilfe eines Binders verfestigt sind, der aus einer Mischung eines Emulsionspolymeren und eines inerten verstärkenden Füllstoffs besteht. Das Polymer wird in Mengen von 2 bis 400 Gew.-%, bezogen auf das Faservlies, und der Füllstoff in Mengen von 5 bis 80 Gew.% angewendet. Als Füllstoffe werden Ton, Calciumcarbonat, Talkum, gefälltes Bariumsulfat, Aluminiumoxidhydrat, Pyrite, Gips, Magnesiumsilikat, Magnesiumcarbonat, Glimmer und Siliziumdioxid genannt. Diese Füllstoffe dienen im Wesentlichen dazu, die Kosten des gebundenen Faservlieses zu senken. Die Vliese werden beispielsweise auf dem Bekleidungssektor, als Reinigungstücher, zum Ausfüttern von Packungen, als Filter und Packungen und Dichtungen von Maschinen eingesetzt.From DE-A-27 42 208 nonwoven fabrics are known which solidified with the aid of a binder are made of a mixture of an emulsion polymer and an inert reinforcing Filler exists. The polymer is purchased in amounts of from 2 to 400% by weight applied to the nonwoven fabric, and the filler in amounts of 5 to 80 wt.%. As fillers are clay, calcium carbonate, talc, precipitated barium sulfate, alumina hydrate, Pyrite, gypsum, magnesium silicate, magnesium carbonate, mica and silicon dioxide called. These fillers essentially serve to reduce the cost of lower bound nonwoven fabric. The nonwovens are used for example in the clothing sector, as cleaning wipes, for feeding out packages, as a filter and Packings and seals used by machinery.

In der EP-A-0 442 370 werden Vliesstoffe beschrieben, die als Bindemittel ein Polymer enthalten, das Carboxylgruppen aufweist und als wässrige Dispersion mit einer mittleren Teilchengröße von 20 bis 400 nm vorliegt und das mit Hilfe von Magnesium, Calcium oder Zink in Form der Oxide, Hydroxide, Carbonate oder Hydrogencarbonate sowie deren Mischungen vernetzt ist. Das Bindemittel kann gegebenenfalls zusätzlich noch ein Resol oder ein Aminoplast enthalten. Die gebundenen Faservliese werden in bituminierter Form als Dachbahnen verwendet.EP-A-0 442 370 describes nonwovens which as a binder are a polymer containing carboxyl groups and as an aqueous dispersion having a middle Particle size of 20 to 400 nm is present and that with the help of magnesium, calcium or zinc in the form of oxides, hydroxides, carbonates or bicarbonates, and whose mixtures are crosslinked. The binder may optionally additionally a resole or an aminoplast. The bonded fiber webs are in bituminized Form used as roofing membranes.

Außerdem sind formaldehydfreie polymere Bindemittel für die Verfestigung von Faservliesen bekannt. So werden beispielsweise in der US-A-4 076 917 Bindemittel beschrieben, die Carbonsäure- oder Anhydridgruppen aufweisende Polymerisate und β-Hydroxyalkylamide als Vernetzer enthalten.In addition, formaldehyde-free polymeric binders for the consolidation of fiber webs known. For example, US Pat. No. 4,076,917 describes binders which the carboxylic acid or anhydride groups having polymers and β-hydroxyalkylamides contained as a crosslinker.

Aus der EP-A-0 445 578 sind Platten aus feinteiligen Materialien wie Glasfasern, bekannt, die mit Hilfe von Bindemittelmischungen aus hochmolekularen Polycarbonsäuren und mehrwertigen Alkoholen, Alkanolaminen oder mehrwertigen Aminen verfestigt sind.From EP-A-0 445 578 plates of finely divided materials such as glass fibers are known, with the help of binder mixtures of high molecular weight polycarboxylic acids and polyhydric alcohols, alkanolamines or polyhydric amines solidified are.

Weitere formaldehydfreie, wässrige Bindemittel zur Herstellung von verfestigten Faservliesen, insbesondere Vliesen aus Glasfasern, sind aus der EP-A-0 583 086 bekannt. Die Bindemittel enthalten eine Polycarbonsäure mit mindestens zwei Carboxyl- oder Anhydridgruppen, mindestens ein Polyol und eine Phosphorverbindung als Reaktionsbeschleuniger. Gemäß der Lehre der EP-A-0 651 088 werden solche Bindemittelmischungen zum Verfestigen von Cellulosesubstraten verwendet. Further formaldehyde-free, aqueous binders for the production of consolidated fiber webs, in particular nonwovens made of glass fibers, are known from EP-A-0 583 086. The binders contain a polycarboxylic acid having at least two carboxyl or Anhydride groups, at least one polyol and a phosphorus compound as a reaction accelerator. According to the teaching of EP-A-0 651 088, such binder mixtures are used used for solidifying cellulose substrates.

Aus der WO-A-97/31036 sind formaldehydfreie, wässrige Bindemittel für Faservliese, insbesondere für Vliese aus Glasfasern, bekannt. Die Bindemittel enthalten (A) ein Polymerisat, das zu 5 bis 100 Gew.-% aus einem ethylenisch ungesättigtem Säureanhydrid oder einer ethylenisch ungesättigten Dicarbonsäure, deren Carboxylgruppen eine Anhydridgruppe bilden können, besteht und (B) ein Alkanolamin mit mindestens zwei Hydroxylgruppen sowie eine Phosphorverbindung als Reaktionsbeschleuniger. Aus den gebundenen Faservliesen werden beispielsweise Dachbahnen, Dämmaterialien, Fußbodenbeläge und Topfreiniger hergestellt.WO-A-97/31036 discloses formaldehyde-free, aqueous binders for nonwoven fabrics, in particular for nonwovens of glass fibers, known. The binders contain (A) Polymer containing from 5 to 100% by weight of an ethylenically unsaturated acid anhydride or an ethylenically unsaturated dicarboxylic acid, its carboxyl groups can form an anhydride group, and (B) an alkanolamine having at least two hydroxyl groups and a phosphorus compound as a reaction accelerator. From the bonded fiber webs, for example, roofing membranes, insulating materials, Flooring and scourer made.

Aus der DE-A-196 21 573 sind thermisch härtbare, wässrige Zusammensetzungen bekannt, die ein hydroxyalkyliertes Polyamin und ein durch radikalische Polymerisation erhältliches Polymer enthalten, das zu 5 bis 100 Gew.-% aus wenigstens einer ethylenisch ungesättigten Mono- oder Dicarbonsäure aufgebaut ist. Solche Mischungen werden u.a. als Bindemittel für Faservliese verwendet.DE-A-196 21 573 discloses thermally curable, aqueous compositions known that a hydroxyalkylated polyamine and a radical polymerization containing from 5 to 100 wt .-% of at least one ethylenic polymer unsaturated mono- or dicarboxylic acid is constructed. Such mixtures are et al used as a binder for nonwoven fabrics.

Aus der EP-A-0 976 866 sind textile Flächengebilde bekannt, die ein Gefüge von Fasern umfassen, die mittels eines polymeren Bindemittels miteinander verbunden sind. Das textile Flächengebilde enthält außerdem 1 bis 20 Gew.-% eines Oxids und/oder Hydroxids von Al, B, Si, Mg, Ti und/oder Zn in kolloiddisperser Verteilung sowie ein Sulfosuccinat oder Sulfosuccinamat als Netzmittel. Die Zusatzstoffe verbessern die Wasseraufnahmeeigenschaften der textilen Flächengebilde, wobei die Hydrophilie der Flächengebilde auch nach mehrmaligem Auswaschen erhalten bleibt.EP-A-0 976 866 discloses textile fabrics which are a structure of fibers comprise, which are interconnected by means of a polymeric binder. The fabric also contains 1 to 20% by weight of an oxide and / or Hydroxides of Al, B, Si, Mg, Ti and / or Zn in a colloidally disperse distribution and a Sulfosuccinate or sulfosuccinamate as wetting agent. The additives improve the Water absorption properties of the fabrics, wherein the hydrophilicity of the Sheet is preserved even after repeated washing.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, Dachbahnen zur Verfügung zu stellen, die ein gebundenes Faservlies enthalten und die gegenüber bekannten Dachbahnen eine verbesserte Wärmestandfestigkeit und Trockenreißfestigkeit besitzen.The present invention has for its object to provide roofing membranes available provide a bonded fiber fleece and the opposite roofing membranes have improved heat resistance and dry tensile strength.

Die Aufgabe wird erfindungsgemäß gelöst mit Dachbahnen auf Basis von gebundenen Faservliesen, die beidseitig mit Bitumen beschichtet sind, wenn das Faservlies mit einer Mischung aus mindestens einem polymeren Bindemittel und einem Aluminiumhydroxid verfestigt ist.The object is achieved with roof membranes based on bonded Non-woven fabrics, which are coated on both sides with bitumen, if the non-woven fabric with a Mixture of at least one polymeric binder and an aluminum hydroxide is solidified.

Die Faservliese können aus natürlichen und/oder synthetischen Fasern bestehen. Beispiele für natürliche Fasern sind Cellulosefasern unterschiedlicher Herkunft wie Zellstoff und Zellwolle sowie Fasern aus Baumwolle, Hanf, Jute, Sisal und Holz, Wolle oder Viskose sowie Mischungen aus mindestens zwei der genannten Faserarten. Bevorzugt eingesetzte Fasern aus dieser Gruppe sind Fasern aus Jute, Sisal und Holz. Beispiele für synthetische Fasern sind Polyester-, Polyamid-, Polypropylen-, Polyethylen-, Polyacrylnitril- und Polyvinylchloridfasern sowie Kohlenstofffasem, Glasfasern, Keramikfasern und Mineralfasern sowie Mischungen aus mindestens zwei der genannten Faserarten. Vorzugsweise verwendet man zur Herstellung der gebundenen Faservliese Polyesterfasern sowie Mischungen aus Polyesterfasern und Glasfasern. Polyesterfasern können auch aus recyceltem Material durch Schmelzspinnen gewonnen und für die Herstellung eines Trägervlieses eingesetzt werden. Die Vliese können z.B. aus Stapelfasern oder aus gesponnenen Fasern sowie Mischungen dieser Faserarten bestehen. Sie werden bekanntlich mechanisch durch Vernadelung oder Wasserstrahlverfestigung eines naß- bzw. luftgelegten Vlieses und durch chemische Verfestigung mit polymeren Bindemitteln hergestellt. Zur Herstellung von gebundenen Faservliesen wird beispielsweise mindestens ein Bindemittel in einer Menge von 0,5 bis 30, vorzugsweise 15 bis 20 Gew.-%, bezogen auf den Feststoffgehalt der Bindemittel und flächenförmiges Fasergebilde wie Vliese, eingesetzt. Das Bindemittel dient zur Verfestigung der Vliese. Es kann beispielsweise durch Sprühen, Tauchen, Imprägnieren oder Pflatschen oder durch Behandeln des Fasergebildes mit einem Schaum angewendet werden.The non-woven fabrics may consist of natural and / or synthetic fibers. Examples for natural fibers are cellulose fibers of different origin such as pulp and rayon and cotton fibers, hemp, jute, sisal and wood, wool or cotton fibers Viscose and mixtures of at least two of the fiber types mentioned. Prefers used fibers from this group are fibers of jute, sisal and wood. Examples of synthetic fibers are polyester, polyamide, polypropylene, polyethylene, Polyacrylonitrile and polyvinyl chloride fibers and carbon fibers, glass fibers, Ceramic fibers and mineral fibers and mixtures of at least two of the above Fiber types. Preferably used for the production of bonded fiber webs Polyester fibers and mixtures of polyester fibers and glass fibers. polyester fibers can also be obtained from recycled material by melt spinning and be used for the production of a carrier fleece. The nonwovens may e.g. out Staple fibers or spun fibers and mixtures of these types of fibers exist. They are known mechanically by needling or hydroentanglement a wet-laid or non-woven fabric and by chemical solidification with made of polymeric binders. For the production of bonded fiber webs is for example, at least one binder in an amount of 0.5 to 30, preferably 15 to 20 wt .-%, based on the solids content of the binder and sheet-like Fiber structures such as nonwovens, used. The binder serves to solidify the Fleeces. It can, for example, by spraying, dipping, impregnating or patting or by treating the fiber structure with a foam.

Die Vliese haben beispielsweise ein Flächengewicht von 50 bis 2000 g/m2, vorzugsweise von 50 bis 1600 g/m2. Meistens beträgt das Flächengewicht der noch nicht verfestigten Vliese 80 bis 300 g/m2.The nonwovens for example have a basis weight of 50 to 2000 g / m 2 , preferably from 50 to 1600 g / m 2 . In most cases, the basis weight of the non-bonded nonwovens is 80 to 300 g / m 2 .

Polymere Bindemittel für die Verfestigung von Vliesen - bzw. anders ausgedrückt - zur Herstellung von gebundenen Faservliesen, sind bekannt. So werden beispielsweise thermisch härtbare Bindemittel für die Verfestigung von Faservliesen in folgenden Druckschriften beschrieben, die hiermit durch Bezugnahme zum Offenbarungsgehalt der vorliegenden Erfindung gemacht werden: US 4 076 917, EP-A-0 445 578, EP-A-0 583 086, EP-A-0 651 088, WO-A-97/31036, Seite 4, Zeile 12 bis Seite 12, Zeile 14, WO-A-97/31059, Seite 2, Zeile 22 bis Seite 12, Zeile 5, WO-A-97/31060, Seite 3, Zeile 8 bis Seite 12, Zeile 36, DE-A-199 49 591, Seite 3, Zeile 5 bis Seite 7, Zeile 38, WO-A-01/27163, Seite 5, Zeile 34 bis Seite 22, Zeile 2 sowie die aus DE-A-199 17 965 bekannten strahlungshärtbaren Bindemittel.Polymeric binders for the consolidation of nonwovens - or in other words - for Production of bonded nonwoven fabrics are known. For example thermally curable binders for the consolidation of fiber webs in the following Publications described herein by reference to the disclosure of the present invention: US 4 076 917, EP-A-0 445 578, EP-A-0 583 086, EP-A-0 651 088, WO-A-97/31036, page 4, line 12 to page 12, line 14, WO-A-97/31059, page 2, line 22 to page 12, line 5, WO-A-97/31060, page 3, line 8 to page 12, line 36, DE-A-199 49 591, page 3, line 5 to page 7, line 38, WO-A-01/27163, Page 5, line 34 to page 22, line 2 as well as those known from DE-A-199 17 965 radiation-curable binder.

Als thermisch härtbare Bindemittel kommen außer den Bindemitteln, die in den obengenannten Druckschriften beschrieben sind, sämtliche härtbaren Bindemittel in Betracht, die zur Verfestigung von Faservliesen in der Literatur beschrieben sind und/oder die für diesen Zweck in der Praxis verwendet werden wie thermisch härtbare Harze auf Basis von Phenol und Formaldehyd, Melamin-Formaldehyd-Harze, Harnstoff-Formaldehyd-Harze, Ein- und Zweikomponentensysteme auf Basis von Epoxidharzen oder Polyurethanen, Polyacrylate, Polymethacrylate, Polyvinylacetate, Styrol-AcrylatCopolymerisat-Dispersionen, Styrol-Methacrylat-Copolymerisat-Dispersionen, StyrolButadien-(Meth)Acrylsäure-Copolymerisat-Dispersionen sowie Mischungen aus den genannten Dispersionen mit einer Mischung aus einer Polycarbonsäure und einem mehrwertigen Alkohol als Vernetzungskomponente.Thermally curable binders other than the binders mentioned in the above Publications are described, all curable binder into consideration, which are described for the consolidation of fiber webs in the literature and / or which are used for this purpose in practice such as thermosetting resins Base of phenol and formaldehyde, melamine-formaldehyde resins, urea-formaldehyde resins, One- and two-component systems based on epoxy resins or polyurethanes, polyacrylates, polymethacrylates, polyvinyl acetates, styrene-acrylate copolymer dispersions, Styrene-methacrylate copolymer dispersions, styrene-butadiene (meth) acrylic acid copolymer dispersions as well as mixtures of the mentioned dispersions with a mixture of a polycarboxylic acid and a polyhydric alcohol as a crosslinking component.

Beispiele für bevorzugt in Betracht kommende thermisch härtbare Bindemittel sind Mischungen aus

  • (a) einem Polymerisat, das durch radikalische Polymerisation erhältlich ist und das zu 5 bis 100 Gew.-% eines ethylenisch ungesättigten Carbonsäureanhydrids oder einer ethylenisch ungesättigten Dicarbonsäure, deren Carbonsäuregruppen eine Anhydridgruppe bilden können, einpolymerisiert enthält und
  • (b) mindestens einem Alkanolamin, das mindestens zwei Hydroxylgruppen im Molekül enthält.
  • Examples of preferably suitable thermally curable binders are mixtures of
  • (A) a polymer which is obtainable by free-radical polymerization and which contains from 5 to 100 wt .-% of an ethylenically unsaturated carboxylic acid anhydride or an ethylenically unsaturated dicarboxylic acid whose carboxylic acid groups can form an anhydride group, in copolymerized form, and
  • (B) at least one alkanolamine containing at least two hydroxyl groups in the molecule.
  • Spezifische Beispiele für solche Mischungen sind ca. 40 bis 60 Gew.-% Feststoffe enthaltende wässrige Lösungen eines Copolymerisates aus 80 Gew.-% Acrylsäure und 20 Gew.-% Maleinsäure einer Molmasse Mw von 15 000 bis 900 000 in Kombination mit Triethanolamin oder wässrige Lösungen eines Copolymerisates aus 55 Gew.-% Acrylsäure und 45 Gew.-% Maleinsäure in Kombination mit Triethanolamin. Diese Bindemittel können gegebenenfalls einen Veresterungskatalysator und/oder eine gebundenen Phosphor enthaltende Verbindung wie hypophosphorige Säure als Reaktionsbeschleuniger.Specific examples of such mixtures are about 40 to 60 wt .-% solids aqueous solutions of a copolymer of 80 wt .-% acrylic acid and 20 wt .-% maleic acid of molecular weight M w from 15 000 to 900 000 in combination with triethanolamine or aqueous solutions of a copolymer of 55% by weight of acrylic acid and 45% by weight of maleic acid in combination with triethanolamine. These binders may optionally contain an esterification catalyst and / or a bound phosphorus-containing compound such as hypophosphorous acid as a reaction accelerator.

    Das oben beschriebene Copolymerisat (a) kann beispielsweise auch aufgebaut sein aus

    • 50 bis 99,5 Gew.-% mindestens einer ethylenisch ungesättigten Mono- oder Dicarbonsäure,
    • 0,5 bis 50 Gew.-% wenigstens einer ethylenisch ungesättigten Verbindung aus der Gruppe der Ester von ethylenisch ungesättigten Monocarbonsäuren und den Monoestern und den Diestern ethylenisch ungesättigter Dicarbonsäuren mit einem mindestens eine Hydroxylgruppe aufweisenden Amin und
    • bis zu 20 Gew.% eines anderen Monomeren.
    The copolymer (a) described above may, for example, also be composed of
    • From 50 to 99.5% by weight of at least one ethylenically unsaturated mono- or dicarboxylic acid,
    • 0.5 to 50 wt .-% of at least one ethylenically unsaturated compound from the group of esters of ethylenically unsaturated monocarboxylic acids and the monoesters and the diesters of ethylenically unsaturated dicarboxylic acids having at least one hydroxyl-containing amine and
    • up to 20% by weight of another monomer.

    Thermisch härtbare, wässrige Zusammensetzungen, die mindestens ein Copolymerisat (a) und mindestens ein Alkanolamin bzw. höherfunktionelles β-Hydroxyalkylamin enthalten, können gegebenenfalls noch zusätzlich mindestens ein Tensid enthalten.Thermally curable, aqueous compositions containing at least one copolymer (a) and contain at least one alkanolamine or higher-functionality β-hydroxyalkylamine, may optionally additionally contain at least one surfactant.

    Weitere thermisch härtbare Bindemittel basieren auf wässrigen Mischungen von

    • Polycarbonsäuren wie Polyacrylsäure, Polymethacrylsäure, Copolymerisaten aus Acrylsäure und Maleinsäure, Copolymerisaten aus Methacrylsäure und Maleinsäure, Copolymerisaten aus Ethylen und Maleinsäure, Styrol und Maleinsäure, oder Copolymerisaten aus Acrylsäure oder Methacrylsäure und Estern von Acryl-oder Methacrylsäure mit vorzugsweise einwertigen 1 bis 24 C-Atome enthaltenden Alkoholen, wobei die Polycarbonsäuren einen K-Wert von 50 bis 100 (gemessen in nicht neutralisierter Form der Polycarbonsäuren nach H. Fikentscher in Dimethylformamid bei 25°C und einer Polymerkonzentration von 0,1 Gew.-%)
    • mehrwertigen Alkoholen wie Trimethylolpropan, Glycerin, 2-Hydroxymethylbutandiol-1,4 oder Polyvinylalkohol und/oder mehrwertigen Aminen und/oder Alkanolaminen.
    Other thermally curable binders are based on aqueous mixtures of
    • Polycarboxylic acids such as polyacrylic acid, polymethacrylic acid, copolymers of acrylic acid and maleic acid, copolymers of ethylene and maleic acid, styrene and maleic acid, or copolymers of acrylic or methacrylic acid and esters of acrylic or methacrylic acid with preferably monovalent 1 to 24 carbon atoms containing alcohols, wherein the polycarboxylic acids have a K value of 50 to 100 (measured in unneutralized form of the polycarboxylic acids according to H. Fikentscher in dimethylformamide at 25 ° C and a polymer concentration of 0.1 wt .-%)
    • polyhydric alcohols such as trimethylolpropane, glycerol, 2-hydroxymethylbutanediol-1,4 or polyvinyl alcohol and / or polyhydric amines and / or alkanolamines.

    Polycarbonsäuren, mehrwertige Alkohole, Alkanolamine und mehrwertige Amine werden bevorzugt in solchen Mengen eingesetzt, dass die Anzahl der Säurefunktion der Gesamtzahl aus alkoholischen Hydroxyl- und Aminfunktionen äquivalent ist, vgl. EP-A-0 445 578. Außerdem eignen sich Binder, die aus einer wässrigen Lösung einer Polycarbonsäure (Homo- oder Copolymerisat) vorzugsweise mit einer Molmasse Mw von 10000 oder darunter und einem Polyol wie Triethanolamin bestehen und bei denen das Verhältnis der Äquivalente von Hydroxylgruppen zu Äquivalenten von Carboxylgruppen in dem Bereich von 0,4 : 1 bis 1,0 : 1 beträgt, vgl. EP-A-0 990 727.Polycarboxylic acids, polyhydric alcohols, alkanolamines and polyhydric amines are preferably used in amounts such that the number of acid function of the total number of alcoholic hydroxyl and amine functions is equivalent, see. EP-A-0 445 578. Also suitable are binders which consist of an aqueous solution of a polycarboxylic acid (homopolymer or copolymer), preferably with a molecular weight M w of 10,000 or lower and a polyol, such as triethanolamine, and in which the ratio of the equivalents of Hydroxyl groups to equivalents of carboxyl groups in the range of 0.4: 1 to 1.0: 1, cf. EP-A-0 990 727.

    Vorteilhaft sind auch die aus der EP-A-0 442 370, Seite 2, Zeile 55 bis Seite 17, Zeile 47 bekannten Bindemittel, die ein Polymer enthalten, das Carboxylgruppen aufweist und als wässrige Dispersion mit einer mittleren Teilchengröße von 20 bis 400 nm vorliegt und das mit Hilfe von Magnesium, Calcium oder Zink in Form der Oxide, Hydroxide, Carbonate oder Hydrogencarbonate sowie deren Mischungen vernetzt ist. Diese Bindemittel können gegebenenfalls zusätzlich noch ein Phenol-Formaldehyd-Kondensat, ein Melamin-Formaldehyd-Harz oder ein Harnstoff-Formaldehyd-Harz enthalten.Also advantageous from EP-A-0 442 370, page 2, line 55 to page 17, line 47 known binders containing a polymer having carboxyl groups and is present as an aqueous dispersion having an average particle size of 20 to 400 nm and with the help of magnesium, calcium or zinc in the form of oxides, hydroxides, Carbonates or bicarbonates and mixtures thereof is crosslinked. These Binders may optionally additionally contain a phenol-formaldehyde condensate, a melamine-formaldehyde resin or a urea-formaldehyde resin.

    Vorzugsweise setzt man als polymeres Bindemittel eine wässrige Dispersion eines thermisch vernetzbaren Copolymerisates aus Acrylsäureestern, Styrol und Acrylnitril ein, das unter Acronal® S 888 S von BASF Aktiengesellschaft erhältlich ist. Besonders bevorzugt verwendet man als polymere Bindemittel ein thermisch vernetzbares Copolymerisat aus Acrylsäureestern, Styrol und Acrylnitril in Kombination mit einem Harnstoff-Formaldehyd-Harz und/oder einem Melamin-Formaldehyd-Harz. Solche Mischungen enthalten beispielsweise 4 bis 20, vorzugsweise 6 bis 16 Gew.% mindestens eines Harzes.The polymeric binder used is preferably an aqueous dispersion of a thermally crosslinkable copolymer of acrylic acid esters, styrene and acrylonitrile A, which is available under Acronal® S 888 S from BASF Aktiengesellschaft. Especially Preferably used as a polymeric binder is a thermally crosslinkable copolymer from acrylic acid esters, styrene and acrylonitrile in combination with a urea-formaldehyde resin and / or a melamine-formaldehyde resin. Such mixtures contain, for example, 4 to 20, preferably 6 to 16 wt.% Of at least one Resin.

    Weitere geeignete Bindemittel für die Verfestigung von Vliesen sind die Produkte, die unter dem Warenzeichen Acrodur® von BASF Aktiengesellschaft vertrieben werden. So ist beispielsweise Acrodur® DS 3558 X ein formaldehydfreies Bindemittel für Fasern und körnige Materialien. Es besteht aus einer wässrigen Styrol-Acrylat-Dispersion, die mit einer Polycarbonsäure und einem mehrwertigen Alkohol als Vernetzungskomponente modifiziert ist. Es vernetzt bereits bei einer Temperatur von 130°C. Um jedoch hohe Produktionsgeschwindigkeiten zu erzielen, führt man die Vernetzung bevorzugt bei Temperaturen von 180 bis 200°C durch. Ein weiteres formaldehydfreies Bindemittel für Holzfasern, Naturfasern und Kork, das sich auch zur Verfestigung von Glas- und Mineralfasern eignet, ist Acrodur® 950 L, das als farblose bis leicht gelbliche, klare, wässrige Lösung einer modifizierten Polycarbonsäure mit einem mehrwertigen Alkohol als Vernetzungskomponente im Handel erhältlich ist. Es vernetzt bei Trocknungstemperaturen von ca. 160 bis 180°C. Um eine hohen Vernetzungsgrad zu erzielen, wird empfohlen, die Produktionsgeschwindigkeit in Abhängigkeit von Vernetzungszeit und Vernetzungstemperatur zu optimieren.Other suitable binders for the consolidation of nonwovens are the products sold under the trademark Acrodur® by BASF Aktiengesellschaft. For example, Acrodur® DS 3558 X is a formaldehyde-free binder for fibers and granular materials. It consists of an aqueous styrene-acrylate dispersion, those with a polycarboxylic acid and a polyhydric alcohol as the crosslinking component is modified. It already cross-links at a temperature of 130 ° C. However To achieve high production speeds, the crosslinking is preferred at temperatures of 180 to 200 ° C through. Another formaldehyde-free binder for wood fibers, natural fibers and cork, which is also used for the consolidation of glass and glass Mineral fibers is Acrodur® 950 L, which acts as a colorless to slightly yellowish, clear, aqueous solution of a modified polycarboxylic acid with a polyhydric alcohol as a crosslinking component is commercially available. It cross-links at drying temperatures from about 160 to 180 ° C. To achieve a high degree of crosslinking, is recommended the production speed depending on curing time and Optimize crosslinking temperature.

    Als Bindemittel setzt man vorzugsweise formaldehydarme oder formaldehydfreie thermisch härtbare Produkte ein. Unter formaldehydarm soll im vorliegenden Zusammenhang verstanden werden, dass die Bindemittel keine wesentlichen Mengen an freiem Formaldehyd enthalten und dass auch beim Trocknen bzw. Härten der mit den Bindemitteln behandelten Materialien keine wesentlichen Mengen an Formaldehyd freigesetzt werden. Im Allgemeinen enthalten solche Bindemittel < 100 ppm Formaldehyd.The binder used is preferably thermally low-formaldehyde or formaldehyde-free hardenable products. Under formaldehydarm should in the present context be understood that the binder does not have significant amounts of free Contain formaldehyde and that also when drying or curing with the binders treated materials did not release significant amounts of formaldehyde become. In general, such binders contain <100 ppm formaldehyde.

    Besonders bevorzugt sind formaldehydfreie Bindemittel, die mindestens eine Polycarbonsäure und mindestens einen mehrwertigen Alkohol und/oder Alkanolamin oder mehrwertiges Amin enthalten. Zusammensetzungen, die diese Bindemittel enthalten, können gegebenenfalls noch weitere formaldehydfreie Bindemittel enthalten, z.B. Polyacrylate, die unter dem Warenzeichen Acronal® von BASF Aktiengesellschaft vertrieben werden.Particularly preferred are formaldehyde-free binders containing at least one polycarboxylic acid and at least one polyhydric alcohol and / or alkanolamine or contain polyvalent amine. Compositions containing these binders may optionally contain further formaldehyde-free binders, e.g. polyacrylates, sold under the trademark Acronal® by BASF Aktiengesellschaft become.

    Sämtliche härtbaren Bindemittel, die für das Binden von Faservliesen bekannt sind und auf die oben hingewiesen wird, können als Bindemittel für Faservliese eingesetzt werden. Außerdem können auch Mischungen aus mindestens einem härtbaren Bindemittel und wenigsten einem anderen Bindemittel verwendet werden.All curable binders known for bonding nonwoven fabrics and to which reference is made above can be used as a binder for nonwoven fabrics. In addition, mixtures of at least one curable binder and at least one other binder.

    Um die Reißkraft und die Wärmestandfestigkeit von Vliesen zu erhöhen, verwendet man erfindungsgemäß eine Mischung aus einem polymeren Bindemittel und mindestens einem Aluminiumhydroxid. Die Mischung enthält beispielsweise auf 100 Gewichtsteile eines polymeren Bindemittels (gerechnet 100%ig) 10 bis 100, vorzugsweise 15 bis 50 Gewichtsteile Aluminiumhydroxyd (gerechnet 100%ig). Als Aluminiumhydroxid kommen beispielsweise Hydrargillit (α-Al(OH)3), Bayerit (β-Al(OH)3), Nordstrandit (γ-Al(OH)3), und Oxidhydroxide wie Böhmit (α-AlO(OH)) und Diaspor (β-AlO(OH)) sowie Mischungen dieser Aluminiumhydroxide in Betracht. Mit Vorteil kann auch aus wasserlöslichen Aluminiumsalzen gefälltes Aluminiumhydroxid eingesetzt werden. Der mittlere Korndurchmesser der Aluminiumhydroxide liegt beispielsweise in dem Bereich von 0,5 bis 50 µm, vorzugsweise 0,9 bis 5 µm. Es ist selbstverständlich möglich, eine Mischung verschiedener Aluminiumhydroxide zu verwenden.In order to increase the breaking strength and heat resistance of nonwovens, the invention uses a mixture of a polymeric binder and at least one aluminum hydroxide. The mixture contains, for example, per 100 parts by weight of a polymeric binder (calculated 100%) 10 to 100, preferably 15 to 50 parts by weight of aluminum hydroxide (calculated 100%). As aluminum hydroxide, for example, come hydrargillite (α-Al (OH) 3 ), bayerite (β-Al (OH) 3 ) Nordstrandit (γ-Al (OH) 3 ), and oxide hydroxides such as boehmite (α-AlO (OH)) and Diaspor (β-AlO (OH)) and mixtures of these aluminum hydroxides into consideration. Advantageously, it is also possible to use aluminum hydroxide precipitated from water-soluble aluminum salts. The mean grain diameter of the aluminum hydroxides is for example in the range of 0.5 to 50 microns, preferably 0.9 to 5 microns. It is of course possible to use a mixture of different aluminum hydroxides.

    Um gelegte Vliese zu verfestigen, behandelt man sie beispielsweise mit einer Mischung aus einem polymeren Bindemittel und einem Aluminiumhydroxid oder man behandelt ein Vlies zunächst mit einem Bindemittel, trocknet es gegebenenfalls und bringt dann das Aluminiumhydroxid auf und erhitzt das so behandelte Vlies zur Verfestigung auf eine Temperatur in dem bereich von 180 bis 230°C. Man kann jedoch auch zunächst die Aluminiumverbindung und anschließend das polymere Bindemittel auftragen und das imprägnierte Vlies dann trocknen und das Bindemittel anschließend vernetzen.To solidify laid nonwovens, they are treated, for example, with a mixture from a polymeric binder and an aluminum hydroxide or first treats a nonwoven with a binder, optionally it dries and then applies the aluminum hydroxide and heats the thus treated nonwoven for solidification to a temperature in the range of 180 to 230 ° C. But you can too first apply the aluminum compound and then the polymeric binder and then dry the impregnated web and then crosslink the binder.

    Die mit einem Bindemittel imprägnierten Vliese werden zur Verfestigung auf Temperaturen in dem Bereich von 180 bis 230°C, vorzugsweise 190 bis 210°C erhitzt. Die Dauer des Erhitzens hängt im Wesentlichen von der Temperatur, dem Wassergehalt und der jeweiligen Faser ab, aus dem das Vlies besteht. Meistens trocknet man die mit mindestens einem Bindemittel imprägnierten bzw. beschichteten Vliese 0,5 bis 5, vorzugsweise 1,3 bis 3 Minuten bei einer Temperatur in dem oben angegebenen Temperaturbereich. Während des Erhitzens entweicht zunächst Wasserdampf, gleichzeitig damit oder anschließend wird das thermisch härtbare Blndemittel vernetzt.The nonwoven webs impregnated with a binder become solidified to temperatures in the range of 180 to 230 ° C, preferably 190 to 210 ° C heated. The duration The heating depends mainly on the temperature, the water content and the respective fiber from which the fleece is made. Mostly you dry with them Nonwovens impregnated or coated with at least one binder are 0.5 to 5, preferably 1.3 to 3 minutes at a temperature in the above-indicated temperature range. During heating, water vapor initially escapes, simultaneously with it or subsequently the thermally curable Blend agent is crosslinked.

    Gegenstand der Erfindung ist außerdem die Verwendung von gebundenen Faservliesen, die mit einer Mischung aus mindestens einem polymeren Bindemittel und mindestens einem Aluminiumhydroxid verfestigt sind, als Trägermaterial für bituminierte Dachbahnen.The invention also provides the use of bonded fiber webs, with a mixture of at least one polymeric binder and at least solidified aluminum hydroxide, as a carrier material for bituminierte roofing membranes.

    Die Dachbahnen werden erhalten, indem man die oben beschriebenen verfestigten Vliese mit Bitumen beidseitig beschichtet bzw. imprägniert. Beispielsweise führt man eine Bahn aus einem in Betracht kommenden Vlies durch eine Bitumenschmelze und presst die auf diese Weise imprägnierte Bahn ab. Dieser Vorgang kann ein- oder auch mehrmals wiederholt werden. Der Bitumenauftrag, bezogen auf das verfestigte Vlies, beträgt beispielsweise 1000 bis 3500, vorzugsweise 1700 bis 2800 Gew.-%. Die Dachbahnen umfassen auch Verbunde von Faservliesen, die mit einer Mischung aus mindestens einem polymeren Bindemittel und mindestens einem Aluminiumhydroxid verfestigt sind. Solche Verbunde erhält man, wenn man beispielsweise zwei jeweils mit Bitumen beschichtete Vliese miteinander verschweißt und dabei gegebenenfalls ein Vlies als Zwischenlage verwendet, das mit einer Mischung aus mindestens einem polymeren Bindemittel und mindestens einem Aluminiumhydroxid verfestigt ist.The roofing membranes are obtained by solidifying the ones described above Nonwovens coated with bitumen on both sides or impregnated. For example, you lead a web of a suitable nonwoven by a bitumen melt and presses the thus impregnated web from. This process can be on or off be repeated several times. The bitumen application, based on the consolidated nonwoven, is for example 1000 to 3500, preferably 1700 to 2800 wt .-%. The roofing membranes also include composites of nonwovens that are made with a mixture of at least a polymeric binder and at least one aluminum hydroxide solidified are. Such composites are obtained if, for example, two each with Bitumen coated nonwovens welded together and optionally one Fleece used as an intermediate layer, which is a mixture of at least one polymeric Binders and at least one aluminum hydroxide is solidified.

    Die erfindungsgemäßen Dachbahnen haben gegenüber den bekannten Dachbahnen überraschenderweise eine höhere Wärmestandfestigkeit und eine höhere Reißkraft. Sie sind außerdem flammfest ausgerüstet stehen preisgünstiger ein als Dachbahnen, die als Trägervlies ein ausschließlich mit einem polymeren Bindemittel verfestigtes Vlies enthalten.The roofing membranes of the invention have over the known roofing membranes Surprisingly, a higher heat resistance and a higher breaking strength. They are also flame-resistant, they are cheaper than roofing membranes, as a carrier fleece a solidified exclusively with a polymeric binder Fleece included.

    Die Prozentangaben in den Beispielen bedeuten Gewichtsprozent, die Teile sind Gewichtsteile. The percentages in the examples are by weight, the parts are parts by weight.

    BeispieleExamples

    Folgende Einsatzstoffe wurden verwendet:

    Binder A:
    Mischung aus 80 Teilen einer 49,5 %igen wässrigen Dispersion eines thermisch vernetzbaren Copolymerisates aus Acrylsäureestern, Styrol und Acrylnitril (Acronal S 888 S) und 20 Teilen eines 40%igen wässrigen Harnstoff-Formaldehyd-Harzes (Urecoll® A)
    Binder 1:
    Mischung aus 100 Teilen Binder A und 5 Teilen eines Aluminiumhydroxids (Hydrargillit) mit einem mittleren Korndurchmesser von 1,2 µm (Apyral® 60 D, Fa. Nabaltec)
    Binder 2:
    Mischung aus 100 Teilen Binder A und 10 Teilen Aluminiumhydroxid (Apyral® 60 D)
    Binder 3:
    Mischung aus 100 Teilen Binder A und 15 Teilen Aluminiumhydroxid (Apyral® 60 D)
    Binder 4:
    Mischung aus 100 Teilen Binder A und 20 Teilen Aluminiumhydroxid (Apyral® 60 D)
    Binder 5:
    Mischung aus 100 Teilen Binder A und 25 Teilen Aluminiumhydroxid (Apyral® 60 D)
    Binder 6:
    Mischung aus 100 Teilen Binder A und 10 Teilen Calciumcarbonat (Omyacarb® Extra CL)
    Binder 7:
    Mischung aus 100 Teilen Binder A und 10 Teilen Kaolin (Speswhite®)
    The following starting materials were used:
    Binder A:
    Mixture of 80 parts of a 49.5% aqueous dispersion of a thermally crosslinkable copolymer of acrylic acid esters, styrene and acrylonitrile (Acronal S 888 S) and 20 parts of a 40% aqueous urea-formaldehyde resin (Urecoll® A)
    Binder 1:
    Mixture of 100 parts of binder A and 5 parts of an aluminum hydroxide (hydrargillite) with an average particle diameter of 1.2 μm (Apyral® 60 D, Nabaltec)
    Binder 2:
    Mixture of 100 parts of binder A and 10 parts of aluminum hydroxide (Apyral® 60 D)
    Binder 3:
    Mixture of 100 parts of binder A and 15 parts of aluminum hydroxide (Apyral® 60 D)
    Binder 4:
    Mixture of 100 parts of binder A and 20 parts of aluminum hydroxide (Apyral® 60 D)
    Binder 5:
    Mixture of 100 parts of binder A and 25 parts of aluminum hydroxide (Apyral® 60 D)
    Binder 6:
    Mixture of 100 parts binder A and 10 parts calcium carbonate (Omyacarb® Extra CL)
    Binder 7:
    Mixture of 100 parts binder A and 10 parts kaolin (Speswhite®)

    Beispiele 1 bis 5Examples 1 to 5

    Ein Trägervlies mit einem Flächengewicht von 150 g/m2 wurde jeweils mit den in der Tabelle angegebenen Bindemittelmischungen imprägniert. Der Auftrag an polymerem Bindemittel und Aluminiumhydroxid betrug immer 20 %, bezogen auf die Feststoffe der Bindemittelmischung und auf das trockene Faservlies. Die Flottenkonzentration der Bindemittelpräparationen wurde jeweils auf 10 % eingestellt. Die imprägnierten Vliese wurden 3 Minuten bei einer Temperatur von 200°C getrocknet. Danach bestimmte man die Reißkraft der gebundenen Vliese bei Raumtemperatur nach DIN 52 123 und die Wärmestandfestigkeit bei 200°C nach DIN 18 192 mit einer Gewichtsbelastung von 4 kg. Die dabei erhaltenen Ergebnisse sind in der Tabelle angegeben wie auch die Ergebnisse der im Folgenden beschriebenen Vergleichsbeispiele. A carrier web having a weight per unit area of 150 g / m 2 was impregnated in each case with the binder mixtures indicated in the table. The order of polymeric binder and aluminum hydroxide was always 20%, based on the solids of the binder mixture and on the dry nonwoven fabric. The liquor concentration of the binder preparations was adjusted to 10% in each case. The impregnated nonwovens were dried for 3 minutes at a temperature of 200 ° C. Thereafter, it was determined the breaking strength of the bonded nonwovens at room temperature according to DIN 52 123 and the heat resistance at 200 ° C according to DIN 18 192 with a weight load of 4 kg. The results obtained are shown in the table as well as the results of the comparative examples described below.

    Vergleichsbeispiel 1Comparative Example 1

    Beispiel 1 wurde mit der einzigen Ausnahme wiederholt, dass man den polymeren Binder ohne weiteren Zusatz verwendete.Example 1 was repeated with the sole exception that the polymeric binder used without further additive.

    Vergleichsbeispiel 2Comparative Example 2

    Beispiel 2 wurde mit der einzigen Ausnahme wiederholt, dass man anstelle von Aluminiumhydroxid jetzt 10 Teile Calciumcarbonat einsetzte.Example 2 was repeated with the sole exception that instead of aluminum hydroxide now used 10 parts of calcium carbonate.

    Vergleichsbeispiel 3Comparative Example 3

    Beispiel 2 wurde mit der einzigen Ausnahme wiederholt, dass man anstelle von Aluminiumhydroxid 10 Teile Kaolin einsetzte.

    Figure 00100001
    Example 2 was repeated with the sole exception that 10 parts of kaolin were used instead of aluminum hydroxide.
    Figure 00100001

    Claims (9)

    Dachbahnen auf Basis von gebundenen Faservliesen, die beidseitig mit Bitumen beschichtet sind, dadurch gekennzeichnet, daß das Faservlies mit einer Mischung aus mindestens einem polymeren Bindemittel und einem Aluminiumhydroxid verfestigt ist.Roofing membranes based on bonded non-woven fabrics, which are coated on both sides with bitumen, characterized in that the non-woven fabric is solidified with a mixture of at least one polymeric binder and an aluminum hydroxide. Dachbahnen nach Anspruch 1, dadurch gekennzeichnet, dass das Faservlies aus natürlichen und/oder synthetischen Fasern besteht.Roofing membranes according to claim 1, characterized in that the nonwoven fabric consists of natural and / or synthetic fibers. Dachbahnen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Faservlies mindestens eine Naturfaser aus der Gruppe Zellstoff und Zellwolle sowie Fasern aus Baumwolle, Hanf, Jute, Sisal und Holz, Wolle oder Viskose sowie Mischungen aus mindestens zwei der genannten Faserarten enthält.Roofing membranes according to claim 1 or 2, characterized in that the nonwoven fabric contains at least one natural fiber from the group of pulp and cellulose and fibers of cotton, hemp, jute, sisal and wood, wool or viscose and mixtures of at least two of said types of fiber. Dachbahnen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Faservlies mindestens eine synthetische Faser aus der Gruppe Polyester-, Polyamid-, Polypropylen-, Polyethylen-, Polyacrylnitril- und Polyvinylchloridfasern sowie Kohlenstofffasern, Glasfasern, Keramikfasern und Mineralfasern sowie Mischungen aus mindestens zwei der genannten Faserarten enthält.Roofing membranes according to claim 1 or 2, characterized in that the nonwoven fabric comprises at least one synthetic fiber from the group of polyester, polyamide, polypropylene, polyethylene, polyacrylonitrile and polyvinyl chloride fibers and carbon fibers, glass fibers, ceramic fibers and mineral fibers and mixtures of at least two of contains mentioned fiber types. Dachbahnen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sie als Aluminiumhydroxid Hydrargillit, Bayerit, Nordstrandit, Böhmit, Diaspor und/oder aus wasserlöslichen Aluminiumsalzen gefälltes Aluminiumhydroxid.Roofing membranes according to one of claims 1 to 4, characterized in that they as aluminum hydroxide, gibbsite, bayerite, nordstrandite, boehmite, diaspore and / or aluminum hydroxide precipitated from water-soluble aluminum salts. Dachbahnen nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das gebundene Vlies mit einer Mischung verfestigt ist, die auf 100 Gewichtsteile mindestens eines polymeren Bindemittels 10 bis 100 Gewichtsteile mindestens eines Aluminiumhydroxids enthält.Roofing sheets according to one of claims 1 to 5, characterized in that the bonded nonwoven fabric is solidified with a mixture containing 100 parts by weight of at least one polymeric binder 10 to 100 parts by weight of at least one aluminum hydroxide. Dachbahnen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Faservlies aus Polyesterfaser oder aus einer Mischung aus Polyesterfasern und Glasfasern besteht.Roofing sheets according to one of claims 1 to 6, characterized in that the nonwoven fabric consists of polyester fiber or of a mixture of polyester fibers and glass fibers. Dachbahn nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass man als polymeres Bindemittel ein thermisch vemetzbares Copolymerisat aus Acrylsäureestern, Styrol und Acrylnitril in Kombination mit einem Harnstoff-Formaldehyd-Harz und/oder einem Melamin-Formaldehyd-Harz einsetzt.Roofing membrane according to one of claims 1 to 7, characterized in that is used as a polymeric binder, a thermally crosslinkable copolymer of acrylic acid esters, styrene and acrylonitrile in combination with a urea-formaldehyde resin and / or a melamine-formaldehyde resin. Verwendung von gebundenen Faservliesen, die mit einer Mischung aus mindestens einem polymeren Bindemittel und mindestens einem Aluminiumhydroxid verfestigt sind, als Trägermaterial für bituminierte Dachbahnen.Use of bonded nonwoven webs containing a mixture of at least a polymeric binder and at least one aluminum hydroxide solidified, as a carrier material for bitumen roofing membranes.
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    US20050208852A1 (en) 2005-09-22
    US20090048371A1 (en) 2009-02-19

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