[go: up one dir, main page]

EP2139664A1 - Procédé de fabrication de récipients multicouches - Google Patents

Procédé de fabrication de récipients multicouches

Info

Publication number
EP2139664A1
EP2139664A1 EP08716293A EP08716293A EP2139664A1 EP 2139664 A1 EP2139664 A1 EP 2139664A1 EP 08716293 A EP08716293 A EP 08716293A EP 08716293 A EP08716293 A EP 08716293A EP 2139664 A1 EP2139664 A1 EP 2139664A1
Authority
EP
European Patent Office
Prior art keywords
container
hydroxyphenyl
bottle
polycarbonate
bis
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Withdrawn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
EP08716293A
Other languages
German (de)
English (en)
Inventor
Claus RÜDIGER
Heinrich Hähnsen
Alexander Meyer
Klaus Kraner
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.)
Bayer Intellectual Property GmbH
Original Assignee
Bayer MaterialScience AG
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 Bayer MaterialScience AG filed Critical Bayer MaterialScience AG
Publication of EP2139664A1 publication Critical patent/EP2139664A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2081/00—Use of polymers having sulfur, with or without nitrogen, oxygen or carbon only, in the main chain, as moulding material
    • B29K2081/06—PSU, i.e. polysulfones; PES, i.e. polyethersulfones or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the present invention relates to a method for producing a container which has at least one layer and a cover layer, wherein the layer contains polycarbonate and the cover layer contains polyarylethersulfone or polyarylsulfone, characterized in that
  • the extrudate is inflated within the mold and pressed against the wall of the mold, wherein the shape of the container is formed, and
  • Web plates or solid sheets are usually provided on one or both sides with UV coextrusion layers on the outer sides in order to protect them from damage (eg yellowing by UV light), but also other multi-layered products are protected against damage by UV light
  • the application of a protective layer against detergents or chemicals is not described.
  • EP-A 0110 221 describes plates of 2 layers of polycarbonate, one layer containing at least 3% by weight of a UV absorber. The production of these plates can take place according to EP-A 0110 221 by coextrusion.
  • EP-A 0320 632 describes moldings which consist of two layers of thermoplastic material, preferably polycarbonate, one layer containing special substituted benzotriazoles. The production of these moldings can be carried out by coextrusion according to EP-A 0320 632.
  • EP-A-0 247 480 describes multilayer boards in which, in addition to a layer of a thermoplastic material, a layer of branched polycarbonate is present, the layer of polycarbonate containing special substituted benzotriazoles. Coextrusion production is also disclosed.
  • EP-A 0500 496 describes polymer compositions which are stabilized against UV light with special triazines and their use as outer layer in multilayer systems.
  • Polymers are described polycarbonate, polyesters, polyacetals, polyphenylene oxide and polyphenylene.
  • Multilayer products of various thermoplastics with a second layer of a fluoropolymer are described in US Pat. No. 3,626,337.
  • Water bottles e.g. 5-gallon bottles are not multi-layered in the prior art (described for example in DE 19943642, DE 19943643, EP-A 0411433). The same applies to reusable milk bottles or conventional 1-1 bottles.
  • U.S. Patent 4,816,093 discloses a process for making a laminate layer container made by coextrusion of two non-adherent thermoplastics. However, the thermoplastic laminate layers should be separable according to the invention.
  • the polycarbonate containers are produced, for example, by the extrusion blow molding method or by the injection blow molding method.
  • Branched polycarbonates are particularly pseudoplastic and thus suitable in particular for blow molding.
  • Injection blow molding is a combination of injection molding and blow molding.
  • the object is to provide a method by which multilayer containers, such as e.g. Bottles or medical articles, which are to be steam sterilizable, which, compared with the prior art, both have improved mechanical long-term stability in aqueous media and improved resistance to organic media and cleaning agents.
  • the products should show the improved properties even at higher contact temperatures as well as in the acidic as well as in the basic range. In particular, the products should have improved mechanical properties under the stresses of use.
  • This object has been surprisingly achieved by a method for producing a container having at least one layer and a cover layer, wherein the layer of polycarbonate and containing the cap layer polyarylethersulphone or polyarylsulfone, characterized in that a) polycarbonate in an extruder at 230-320 0 C) is melted, b) polyarylethersulfone or polyarylsulfone is melted on another extruder, c) which are formed from steps a) and b) by coextrusion to a tube which is enclosed by a mold, d) the extrudate inflated within the mold and is pressed against the wall of the tool, wherein the shape of the container is formed, and e) the container obtained from d) is cut off and cooled.
  • the cover layer of polyarylsulphone or polyarylethersulphone must be applied to the containers on the side in contact with the medium from which the polycarbonate is to be protected. In general, therefore, containers will be an inner protective layer in the protective overcoat.
  • the containers obtained by the method according to the invention show a superiority over the prior art, e.g. Standard polycarbonate containers. This is especially true in
  • the shaped body such as e.g. a
  • Layer forms can go through more cleaning cycles than a container according to the prior art.
  • the present application further relates to extrusion blow-molded Mehr harshs ⁇ - systems, wherein the polyarylsulfone or Poylarylethersulfon the general formula I or ⁇ has as a repeat unit:
  • a and B may be optionally substituted aromatic radicals.
  • the aromatic radicals consist of 6 to 40 carbon atoms, preferably of 6 to 21 carbon atoms, which contain one or more optionally condensed aromatic nuclei, wherein the cores may optionally contain heteroatoms.
  • These aromatic nuclei may optionally be substituted by linear or branched or cycloaliphatic C 1 to C 15 radicals or halogen atoms.
  • the aromatic nuclei may be linked via carbon bonds or via heteroatoms as a bridge member.
  • A can e.g. represent phenyl, alkylphenyl, alkoxyphenyl or corresponding chlorine- or fluorine-substituted derivatives, preferably unsubstituted phenyl radicals.
  • B is preferably bisphenols, which are based on those of the general formula (HI)
  • R 1 and R 2 each independently of one another, the same or different, represent hydrogen, halo, C 1 -C 6 -alkyl, or C 1 -C 6 -alkoxy, preferably hydrogen, fluorine, chlorine or bromine,
  • n is an integer 1-4 preferably 1,2,3, in particular 1 or 2
  • x is a chemical bond -CO-, -O-, -S-, -SO2-, alkylene, alkylidene, preferably Cl- ClO alkylidene or cycloalkylene, where the latter three radicals by substituents selected from halogen, in particular fluorine, chlorine , Bromine, optionally substituted by fluorine, chlorine, bromine, C 1 -C 4 alkyl or C 1 -C 4 -alkoxy-substituted phenyl or naphthyl, and wherein cycloalkylene may additionally be substituted by C 1 -C 6 -alkyl.
  • X is cycloalkylene
  • X is preferably a radical of the formula (IV)
  • R 2 and R 3 for each Y independently of one another are hydrogen, C 1 -C 6 -alkyl, particularly preferably hydrogen or C 1 -C 4 -alkyl, in particular hydrogen, methyl or ethyl, and
  • n is an integer from 3 to 12, preferably 4 to 8, in particular 4 or 5.
  • B preferably stands for building blocks derived from:
  • Preferred building blocks are derived from hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, 4,4-bis (hydroxyphenyl) sulfone, 2,2-bis (4-hydroxyphenyl) -1-phenyl-propane, 1, 1 - Bis (4-hydroxyphenyl) -phenyl-ethane, 2,2-bis (4-hydroxyphenyl) propane, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1,3-bis- [ 2- (4-hydroxyphenyl) -2-propyl] benzene (bisphenol M), 2,2-bis (3-methyl-4-hydroxyphenyl) -propane, bis (3,5-dimethyl-4-hydroxyphenyl ) -methane, 2,2-bis- (3,5-dimethyl-4-hydroxyphenyl) -propane, bis- (3,5-dimethyl-4-hydroxyphenyl) -sulfone, 2,4-bis- (3 , 5-dimethyl-4-
  • Particularly preferred building blocks are derived from hydroquinone, 4,4-bis (hydroxyphenyl) sulfone, 4,4'-dihydroxydiphenyl, 1, 1-bis (4-hydroxyphenyl) -phenyl-ethane, 2,2-bis ( 4-hydroxyphenyl) propane, 2,2-bis (3,5-dimethyl-4-hydroxyphenyl) -propane, 1,1-bis (4-hydroxyphenyl) cyclohexane and 1,1-bis (4-hydroxyphenyl ) -3,3,5-trimethylcyclohexane (bisphenol TMC).
  • Particularly preferred polymers of the formulas (I) or (II) are, for example, the polysulfone of bisphenol A (commercially available under the name Udel TM ® from Fa. Amoco, Chicago, USA or R Ultrason ® from Fa. BASF), a polyether sulfone of phenyl Units constructed (commercially available under the name Ultrason E ® from BASF and SumikaExcel ® from the company. Sumitomo, Japan), the polyarylethersulfone with 4,4'-dihydroxydiphenyl structures from. Amoco (Radel R ® ) or polysulfones with TMC bisphenol structures according to DE-OS 3 833 385.
  • the polysulfone of bisphenol A commercially available under the name Udel TM ® from Fa. Amoco, Chicago, USA or R Ultrason ® from Fa. BASF
  • a polyether sulfone of phenyl Units constructed commercially available under the name Ultrason E ®
  • sulfone polymer types may optionally be used in different types in terms of molecular weight.
  • the selection is determined by the desired molecular weights of the end products.
  • the sulfone polymers have weight average molecular weights of 5,000 to 100,000, preferably 3,000 to 75,000, as measured by gel permeation chromatography (GPC) versus polystyrene standard.
  • GPC gel permeation chromatography
  • Especially preferred is bisphenol A based polysulfone.
  • polymers can be prepared by methods familiar to those skilled in the art such as e.g. by base-catalyzed polycondensation of corresponding aromatic bisphenols and halogen-substituted carbonic acid derivatives.
  • the present invention is the use of polyarylsulfone or polyarylethersulfone for producing multilayer containers, for example. Coextrudates such as multilayer containers, these multilayer moldings themselves, and further comprising processes for producing these multilayer moldings by coextrusion or extrusion blow molding and the use of compositions suitable for coating polyarylsulfones or polyarylethersulfones described above, wherein at least one layer consists of polycarbonate.
  • the multi-layered product according to the invention has numerous advantages over products which correspond to the state of the art. For example, it has the advantage that this product has a higher has mechanical stability to aqueous media in use and to cleaning media. The long-term stability of the moldings according to the invention is significantly improved. Furthermore, the product has improved mechanical properties, which in particular increases the life.
  • those multilayer containers are preferred in which the coex layer is 1 to 5000 ⁇ m thick, preferably 5 to 2500 ⁇ m and particularly preferably 10 to 500 ⁇ m.
  • a further preferred embodiment is a three-layered container consisting of a polycarbonate base layer and two overlying layers which each consist of identical or different polyaryl sulfones or polyaryl ether sulfones or blends thereof.
  • bottles e.g., 5 gallon bottles, baby bottles, milk bottles, water bottles, or general returnable bottles
  • medical devices e.g.
  • Containers according to the present invention can be used for the packaging, storage or transport of liquids, solids or gases. Preference is given to containers for the packaging, storage or transport of liquids (liquid containers), containers for packaging, storage or transport of water (water bottles) are particularly preferred. Also preferred are containers for packaging food.
  • Containers according to the invention are hollow bodies having a volume of preferably 0.1 to 50, more preferably of 0.5 to 50 1. Particularly preferred are water bottles with a volume of 3 to 5 gallons.
  • the containers have a curb weight of preferably 0.1 g to 3000 g, preferably 50 g to 2000 g and more preferably from 650 to 900 g.
  • the wall thicknesses of the containers are preferably 0.2 to 5 mm, preferably 0.5 to 4 mm.
  • Containers according to the present invention have a length of preferably 5 mm to 2000 mm, preferably 100 to 1000 mm.
  • the containers have a maximum circumference of preferably 100 mm to 2500 mm.
  • the wall thickness of the bottle neck of the container preferably varies from 0.5 to 10 mm, more preferably from 1 mm to 10 mm and most preferably from 5 to 7 mm.
  • Container in the sense of present invention may have any shape; they can be round, oval or polygonal with eg 3 to 12 sides. Preferred are round, oval and hexagonal shapes.
  • the production of the containers according to the invention is preferably carried out by the extrusion blown method or by the injection blown method.
  • the polycarbonates according to the invention are processed on extruders with a smooth or grooved, preferably a smooth, feed zone.
  • the drive power of the extruder is selected according to the screw diameter. As an example, with a screw diameter of 60 mm, the drive power of the extruder is approximately 30-40 kW, with a screw diameter of 90 mm, approximately 60 to 70 kW.
  • Suitable are the usual universal three-zone screws used in the processing of engineering thermoplastics.
  • a screw diameter of 50 to 60 mm is preferred.
  • a screw diameter of 70 to 100 mm is preferred.
  • the length of the screws is preferably 20 to 25 times the diameter of the screw.
  • the blow mold is preferably tempered to 20-60 0 C in order to obtain a brilliant and high-quality surface of the container.
  • the bottom region and the jacket region of the tool (corresponding to the bottom and the walls of the bottle-shaped container) can be tempered separately from one another.
  • the blow molding tool is preferably closed with a crimping force of 1000 to 1500 N per cm squish seam length.
  • the extrudate may be inflated by means of a system capable of increasing the pressure in the mold.
  • This may preferably be a compressed air line.
  • the polycarbonate according to the invention Prior to processing, the polycarbonate according to the invention is preferably dried so that the optical quality of the containers is not impaired by streaks or bubbles and the polycarbonate is not degraded hydrolytically during processing.
  • the residual moisture content after drying is preferably less than 0.1 wt .-%.
  • a drying temperature of about 120 ° C. is preferred. Dry air dryers are preferred for drying the polycarbonate. The drying of the polysulfone or polyether sulfone, for example, carried out in a circulating air drying cabinet at 120 0 C.
  • the preferred melt temperature during the processing of the required for the preparation of the body polycarbonate 230 - 320 0 C.
  • the preferred temperatures of the main extruder be 230 - 320 0 C after the feed zone.
  • the containers of the invention may be used for packaging, storage or transport of liquids, solids, or gases.
  • the embodiment is as a container, which are used for example for packaging, storage or transport of liquids.
  • a preferred embodiment of the invention is that in which the containers of branched polycarbonate are characterized in that the branched polycarbonate contains as branching l, l, l-tris (4-hydroxyphenyl) -ethane or Isatinbiskresol, in the preparation of the branched polycarbonate alkylphenols be used as a chain terminator and in which the container is a water bottle.
  • a preferred embodiment of the invention is that in which the branched polycarbonate containers are characterized in that the branched polycarbonate contains as branching agent, 1,1-tris (4-hydroxyphenyl) ethane or isatin biscresol, in the preparation of the branched polycarbonate Phenol or tert-butylphenol is used and in which the polycarbonate at 260 0 C and a shear rate of 10 s-1, a melt viscosity of 5500 to 8000 Pas and at 260 0 C and a shear rate of 1000 s-1, a melt viscosity of 880 to 1500 Pas each determined to ISO 11443 and an MFR (MeIt flow index, measured to ISO 1133) ⁇ 3.5 g / 10 min and in which the container is a water bottle.
  • the branched polycarbonate contains as branching agent, 1,1-tris (4-hydroxyphenyl) ethane or isatin biscresol, in the preparation of the branched polycarbonate Phen
  • a particular preferred embodiment of the invention is further that in which the containers of branched polycarbonate characterized in that the branched polycarbonate contains as branching l, l, l-tris (4-hydroxyphenyl) ethane or Isatinbiskresol and in the preparation of the branched polycarbonate phenol or p-tert-butylphenol or p-cumylphenol and / or p-isooctylphenol, and in which the container is a water bottle.
  • the multi-layered containers are transparent.
  • Both the base material and the protective layer in the multilayer molded parts according to the invention may contain additives.
  • the protective layer and / or the PC layer may contain, for example, mold release agents.
  • the layers may also contain other customary processing auxiliaries, in particular flow aids, and the stabilizers customary in PC, in particular heat stabilizers, as well as colorants, optical brighteners and inorganic pigments.
  • Suitable polycarbonates are, for example, homopolycarbonates, copolycarbonates and thermoplastic polyestercarbonates
  • the preparation of the polycarbonates according to the invention is also possible from diaryl carbonates and diphenols according to the known polycarbonate process in the melt, the so-called melt transesterification process, which is e.g. in WO-A 01/05866 and WO-A 01/05867.
  • transesterification for example, in US-A 34 94 885, 43 86 186, 46 61 580, 46 80 371 and 46 80 372, in EP-A 26 120, 26 121, 26 684, 28 030 , 39 845, 39 845, 91 602, 97 970, 79 075, 14 68 87, 15 61 03, 23 49 13 and 24 03 01 as well as in DE-A 14 95 626 and 22 32 977 described.
  • the use according to the invention of phenolic compounds having o- and / or m-substituents as chain terminators is possible
  • the preparation of the polycarbonates is preferably carried out according to the phase boundary or after the melt transesterification process and is explained below by way of example the phase boundary process.
  • Diphenols suitable for the preparation of the polycarbonates to be used according to the invention are, for example, hydroquinone, resorcinol, dihydroxydiphenyl, bis (hydroxyphenyl) alkanes, bis (hydroxyphenyl) cycloalkanes, bis (hydroxyphenyl) sulfides, bis (hydroxyphenyl) ethers , Bis (hydroxyphenyl) ketones, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) sulfoxides, ⁇ , ⁇ '-bis (hydroxyphenyl) diisopropylbenzenes, and their alkylated, nuclear alkylated and nuclear halogenated compounds, and 2-hydrocarbyl 3,3-bis (4-hydroxyaryl) phthalimidines, especially 2-phenyl-3,3-bis (4-hydroxyphenyl) phthalimidine.
  • Preferred diphenols are 4,4'-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) -1-phenylpropane, N-phenylisatinebisphenol 1, 1-bis (4-hydroxyphenyl) -phenyl-ethane, 2 , 2-bis (4-hydroxyphe- nyl) propane, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 1,3-bis [2- (4-hydroxyphenyl) -2-propyl] benzene (bisphenol M), 2,2 Bis (3-methyl-4-hydroxyphenyl) -propane, 2-phenyl-3,3-bis (4-hydroxyphenyl) phthalimidine, bis (3,5-dimethyl-4-hydroxyphenyl) -methane, 2 , 2-bis (3,5-dimethyl-4-hydroxyphenyl) propane, bis (3,5-dimethyl-4-hydroxyphenyl) sulfone, 2,4-bis (3,5-dimethyl-4-) hydroxyphen
  • diphenols are 4,4'-dihydroxydiphenyl, 1,1-bis (4-hydroxyphenyl) -phenyl-ethane, 2,2-bis (4-hydroxyphenyl) -propane, 2,2-bis (3,5 -dimethyl-4-hydroxyphenyl) -propane, 1,1-bis- (4-hydroxyphenyl) -cyclohexane and 1,1-bis- (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (bisphenol TMC).
  • the diphenols may be used alone or in admixture with each other; Both homopolycarbonates and copolycarbonates are included in the invention.
  • the monofunctional chain terminators of the invention required for controlling the molecular weight can be phenols or alkylphenols, in particular phenol, p-tert-butylphenol, isobutyl,
  • the one or more chain terminators however, added after phosgenation in one place or at a time when phosgene is no longer present, but the catalyst has not yet been dosed, or they are dosed in front of the catalyst, together with the catalyst or in parallel.
  • any branching or debranching compounds to be used are added to the synthesis, but usually before the chain terminators.
  • trisphenols, quarterphenols or acid chlorides of tri- or tetracarboxylic acids are used, or mixtures of polyphenols or acid chlorides.
  • suitable compounds having three or more than three phenolic hydroxyl groups are phloroglucinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptene-2, 4,6-dimethyl-2, 4,6-tri- (4-hydroxyphenyl) -heptane, 1, 3,5-tri- (4-hydroxyphenyl) -benzene, 1,1,1-tri- (4-hydroxyphenyl) -ethane, tri- (4-hydroxyphenyl) -phenylmethane, 2,2-bis- (4,4-bis (4-hydroxyphenyl) -cyclohexyl] -propane, 2,4-bis (4-hydroxyphenyl-isopropyl) -phenol, and tetra (4-hydroxyphenyl) methane.
  • Some of the other trifunctional compounds are 2,4-dihydroxybenzoic acid, trimesic acid, cyanuric chloride and 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole.
  • Preferred branching agents are 3,3-bis (3-methyl-4-hydroxyphenyl) -2-oxo-2,3-dihydroindole and 1,1,1-tri- (4-hydroxyphenyl) -ethane.
  • the aromatic polycarbonates of the present invention have weight average molecular weights M w (determined by gel permeation chromatography and polystyrene standard calibration) of between 5,000 and 200,000, preferably between 10,000 and 80,000 and more preferably between 48,000 and 6,200 g / mol.
  • the relative solution viscosities are respectively between 1.10 and 1.60 as measured in methylene chloride (0.5 g polycarbonate in 100 ml methylene chloride at 23 0 C).
  • the homopolycarbonate based on bisphenol A is particularly preferred. Branched homopolycarbonates based on bisphenol A are likewise particularly preferred.
  • the polycarbonates can also be added to the usual additives for these thermoplastics additives such as fillers, UV stabilizers, heat stabilizers, antistatic agents and pigments in the usual amounts; if necessary, the demolding behavior, the flow behavior, and / or the flame retardancy can be improved by adding external mold release agents, flow agents, and / or flame retardants (eg, alkyl and aryl phosphites, phosphates, phosphanes, low molecular weight carboxylic acid esters, halogen compounds, salts, chalk, Quartz powder, glass and carbon fibers, pigments and their combination Such compounds are described, for example, in WO 99/55772, p. 15-25, and in "Plastics Additives", R. Gumbleter and H. Müller, Hanser Publishers 1983).
  • Suitable additives are described, for example, in “Additives for Plastics Handbook, John Murphy, Elsevier, Oxford 1999", in the “Plastics Additives Handbook, Hans Zweifel, Hanser, Kunststoff 2001”.
  • Suitable antioxidants or thermal stabilizers are, for example:
  • Aromatic hydroxybenzyl compounds
  • organic phosphites, phosphonates and phosphenes usually those in which the organic radicals consist entirely or partially of optionally substituted aromatic radicals.
  • Suitable complexing agents for heavy metals and for the neutralization of alkali traces are o / m phosphoric acids, completely or partially esterified phosphates or phosphites,
  • UV absorbers are suitable.
  • 2- (2'-hydroxyphenyl) benzotriazoles 2-hydroxybenzophenones, esters of substituted and unsubstituted benzoic acids, acrylates, hindered amines, oxamides, 2.8.
  • 2- (2-hydroxyphenyl) -l, 3,5-triazines, and poly-substituted triazines such.
  • 2- [2-hydroxy-4- (2-ethylhexyl) oxy] phenyl-4,6-di (4-phenyl) phenyl-1,3,5-triazine (CAS No. 204583-39-1 );
  • substituted benzotriazoles or substituted triazines are preferred.
  • Polypropylene glycols alone or in combination with e.g. Sulfones or sulfonamides as stabilizers can be used against damage from gamma rays.
  • stabilizers may be used singly or in combinations and added to the polymer in the above-mentioned forms.
  • processing aids such as mold release agents, usually derivatives of long-chain fatty acids, can be added.
  • processing aids such as mold release agents, usually derivatives of long-chain fatty acids, can be added.
  • Preferred are e.g. Pentaerythritol tetrastearate and glycerol monostea- rat. They are used alone or in a mixture, preferably in an amount of 0.02 to 1 wt .-%, based on the composition of the composition.
  • Suitable flame retardant additives are phosphate esters, i. H. Triphenyl phosphate, resorcinol diphosphoric acid esters, bromine-containing compounds such as brominated phosphoric acid esters, brominated oligocarbonates and polycarbonates, and preferably salts of fluorinated organic sulfonic acids.
  • Suitable impact modifiers are butadiene rubber grafted with styrene-acrylonitrile or methyl methacrylate, ethylene-propylene rubbers grafted with maleic anhydride, ethyl and Butylacrylatkautschuke grafted with methyl methacrylate or styrene-acrylonitrile, interpenetrating siloxane and acrylate networks with grafted methyl methacrylate or styrene-acrylonitrile.
  • colorants such as organic dyes or pigments or inorganic pigments, IR absorbers, individually, mixed or in combination with stabilizers, glass fibers, glass (hollow) balls, inorganic fillers may be added.
  • the additives may be present in both the base and in or in the coex layers. In each layer different additives may be present in different concentrations.
  • All molding compositions used for the production of the multilayered products according to the invention their starting materials and solvents may be contaminated with corresponding impurities from their preparation and storage, the aim being to work with as clean starting materials as possible.
  • the starting materials may possibly have been filtered.
  • the mixing of the individual constituents in the molding compositions can be carried out in a known manner both successively and simultaneously both at room temperature and at elevated temperature.
  • the incorporation of the additives into the molding compositions for the erf ⁇ ndungswashen products in particular the aforementioned additives is preferably carried out in a known manner by mixing polymer granules with the additives at temperatures of 200 to 330 0 C in conventional units such as internal mixers, Einschneckenextrudern, and Doppelwellenextrudern for example by Schmelle zecompounding or Melt extrusion or by mixing the solutions of the polymer with solutions of the additives and subsequent evaporation of the solvent in a known manner.
  • the proportion of additives in the molding compositions can be varied within wide limits. And depends on the desired properties of the molding compounds.
  • the total amount of the additives in the molding composition is preferably about up to 20% by weight, preferably 0.2 to 12% by weight, based on the weight of the molding composition.
  • Coextrusion is known from the literature (see, for example, EP-A 0110221 and EP-A 0110238).
  • the procedure is preferably as follows:
  • the extruder for producing the core layers and cover layers are connected to a coextrusion adapter.
  • the adapter is designed so that the melt forming the cover layers is applied as a thin layer adhering to the melt of the core layer.
  • the multilayer melt strand thus produced is then brought into the desired shape in the subsequently connected nozzle.
  • Multilayer composites can also be produced according to the prior art by extrusion coating or coextrusion blow molding.
  • the following method is used to produce the multi-layer products:
  • the polycarbonate is either linear or branched. Branched polycarbonate is preferably used.
  • the polycarbonate is in an extruder at 230 - 320 0 C melted.
  • a polyethersulfone having an average molecular weight of 3000-75000 (mass average determined by gel permeation chromatography and polystyrene standard) at 280-350 0 C is melted. Both polymer melts are passed through a coextrusion die and formed into a tube. In the middle of the hose a compressed air line is attached. The tube is preferably guided from top to bottom in a tool which has the desired bottle shape. Through the compressed air line, the extrudate is inflated and pressed against the wall of the tool. The mold temperature is preferably 20 - 60 0 C. Then the tool opens and the finished coextrudate is cut off.
  • Bottle type 1 (according to the invention):
  • the extruder with a three-zone screw with 6 different heating zones of 60 mm diameter and a process length of 25xD Makrolon 1239 ® is promoted.
  • the extruder with a three-zone screw with 4 different heating zones and a process length of 25xD supports Udel P3500 ® .
  • the melts are directed via a deflection head to a coexadapter, which is equipped with a round nozzle with 40 mm diameter and a mandrel with 34 mm diameter. From the nozzle, the melt tube enters the detection area of the bottle tool, which has the temperatures listed in Table 1.
  • the tool for producing a square 11-bottle encloses the melt tube, which is separated from a hot wire from the rest of the strand.
  • a blow pin enters the tempered tool and blows the melt tube to the inner tool wall.
  • the finished bottle cools and is placed in a storage device.
  • Table 1 The process parameters are summarized in Table 1.
  • Bottle geometry square bottle 11
  • the bottle is prepared as described in Example 1.
  • the process parameters described in Table 2 were set.
  • Bottle geometry square bottle 11
  • the co-formed bottles are filled with cleaning solution and stored for several days.
  • the mechanical stability is checked after rinsing and drying the bottle by means of a puncture test according to ISO 6603-2 with oil.
  • a shock body hits the specimen at a constant speed at a right angle and punctures it.
  • the test is carried out as follows: On plates of the surface 40 * 40 mm 2 (cut out sample) and a thickness of about 1 mm, a puncture test according to ISO 6603-2 is performed from outside to inside.
  • the weight of the drop bolt is 23.17 kg.
  • the speed is 4.42 m / s.
  • the height of fall is 0.996 m.
  • the temperature during the measurement is 21 ° C.
  • a total of 7 tests were carried out on different extrudates (different parts of the bottle).
  • the haze is determined according to ASTM D 1703 on a 40 x 40 mm piece of bottle.
  • Bottle type 1 (according to the invention):
  • a cleaning solution is filled.
  • This cleaning solution consists of 10.0% 2-isopropanol, 10.0% sodium hydroxide and 0.1% sodium dodecyl sulfate dissolved in Millipore water.
  • the bottle is stored at 70 ° C for 10 days.
  • a cleaning solution is filled.
  • This cleaning solution consists of 10.0% 2-isopropanol, 10.0% sodium hydroxide and 0.1% sodium dodecyl sulfate dissolved in Millipore water.
  • the bottle is stored for 10 days at 70 0 C.
  • the mean value for the penetration energy was 18.7 J.
  • the mean value of the maximum force absorption was 2227 N.

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un récipient, qui présente au moins une couche et une couche de recouvrement, la couche contenant du polycarbonate et la couche de recouvrement contenant du polyaryléthersulfone ou du polyarylsulfone. Le procédé se caractérise en ce que a) le polycarbonate est fondu sur une extrudeuse à 230 - 320 °C, b) le polyaryléthersulfone ou le polyarylsulfone est fondu sur une autre extrudeuse, c) un tube est formé par coextrusion à partir des masses fondues obtenues aux étapes a) et b), lequel tube est ensuite entouré d'un moule, d) l'extrudat est soufflé puis pressé contre la paroi de l'outil, le moule du récipient étant ainsi formé, et e) le récipient issu de l'étape d) est sectionné et refroidi. L'invention concerne également des récipients de ce type et l'utilisation desdits récipients comme bouteilles ou articles médicinaux.
EP08716293A 2007-03-16 2008-03-06 Procédé de fabrication de récipients multicouches Withdrawn EP2139664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013273A DE102007013273A1 (de) 2007-03-16 2007-03-16 Verfahren zur Herstellung mehrschichtiger Behälter
PCT/EP2008/001777 WO2008113479A1 (fr) 2007-03-16 2008-03-06 Procédé de fabrication de récipients multicouches

Publications (1)

Publication Number Publication Date
EP2139664A1 true EP2139664A1 (fr) 2010-01-06

Family

ID=39433011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08716293A Withdrawn EP2139664A1 (fr) 2007-03-16 2008-03-06 Procédé de fabrication de récipients multicouches

Country Status (6)

Country Link
US (1) US8414823B2 (fr)
EP (1) EP2139664A1 (fr)
CN (1) CN101631662A (fr)
DE (1) DE102007013273A1 (fr)
MX (1) MX2009009770A (fr)
WO (1) WO2008113479A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2544676C2 (ru) 2010-04-16 2015-03-20 Вэлспар Сорсинг, Инк. Составы для покрытий для упаковочных изделий и способы нанесения покрытий
US8889824B2 (en) 2010-07-16 2014-11-18 X-Flow Bv Grafted poly(arylsulfone) and a process for grafting a poly(arylsulfone)
PL3425011T3 (pl) 2011-02-07 2021-05-17 Swimc Llc Kompozycje powłokowe do pojemników i innych wyrobów i sposoby powlekania
JP6166719B2 (ja) 2011-06-17 2017-07-19 ベリー プラスチックス コーポレイション カップ用断熱スリーブ
US9944749B2 (en) 2012-08-09 2018-04-17 Swimc, Llc Polycarbonates
EP2883113A4 (fr) 2012-08-09 2016-03-30 Valspar Sourcing Inc Développeur pour des matières d'enregistrement thermosensibles
IN2015DN00445A (fr) 2012-08-09 2015-06-19 Valspar Sourcing Inc
EP2882818B1 (fr) 2012-08-09 2020-05-06 Swimc Llc Stabilisant et compositions de revêtement de celui-ci
KR102093405B1 (ko) 2012-08-09 2020-03-25 에스더블유아이엠씨 엘엘씨 용기 코팅 시스템
EP2882401A4 (fr) 2012-08-09 2016-03-30 Valspar Sourcing Inc Matériaux dentaires et procédé de fabrication associé
CN102850547B (zh) * 2012-10-15 2014-06-11 吉林大学 一种主链中含Si-O-Si结构的聚芳醚砜树脂及其制备方法
BR112015022750A2 (pt) 2013-03-14 2017-07-18 Berry Plastics Corp recipiente
MX386367B (es) 2013-07-12 2025-03-18 Berry Plastics Corp Material polimérico para recipientes.
CN105592997A (zh) 2013-08-16 2016-05-18 比瑞塑料公司 用于绝缘容器的聚合物材料
CA2917818A1 (fr) 2013-08-26 2015-03-05 Berry Plastics Corporation Materiau polymere pour recipient
TW201536527A (zh) 2013-08-30 2015-10-01 Berry Plastics Corp 多層管以及其製造方法
KR102429146B1 (ko) 2014-04-14 2022-08-04 에스더블유아이엠씨 엘엘씨 용기 및 기타 물품용 조성물의 제조방법 및 상기 조성물의 사용 방법
EP3131966B1 (fr) 2014-04-15 2020-07-08 SABIC Global Technologies B.V. Compositions de polycarbonates haute température
EP3131967B1 (fr) 2014-04-15 2021-04-14 SHPP Global Technologies B.V. Compositions de polycarbonates haute température
US9937652B2 (en) 2015-03-04 2018-04-10 Berry Plastics Corporation Polymeric material for container
DE102015116724A1 (de) 2015-10-01 2017-04-06 Technip Zimmer Gmbh Verfahren und Vorrichtung zur kontinuierlichen Modifikation einer Polymerschmelze aus unextrahiertem Polyamid 6 mit einem oder mehreren Additiven
TWI614275B (zh) 2015-11-03 2018-02-11 Valspar Sourcing Inc 用於製備聚合物的液體環氧樹脂組合物
CN107264930B (zh) * 2017-06-19 2022-09-23 孙立普 一种泡酒瓶的总体制作方法

Family Cites Families (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US362637A (en) 1887-05-10 Earth-closet
DE1007996B (de) 1955-03-26 1957-05-09 Bayer Ag Verfahren zur Herstellung thermoplastischer Kunststoffe
US2991273A (en) 1956-07-07 1961-07-04 Bayer Ag Process for manufacture of vacuum moulded parts of high molecular weight thermoplastic polycarbonates
US3148172A (en) 1956-07-19 1964-09-08 Gen Electric Polycarbonates of dihydroxyaryl ethers
US2999846A (en) 1956-11-30 1961-09-12 Schnell Hermann High molecular weight thermoplastic aromatic sulfoxy polycarbonates
US2999835A (en) 1959-01-02 1961-09-12 Gen Electric Resinous mixture comprising organo-polysiloxane and polymer of a carbonate of a dihydric phenol, and products containing same
DE1495626B1 (de) 1960-03-30 1971-06-09 Bayer Ag Verfahren zum herstellen von polyestern
GB1122003A (en) 1964-10-07 1968-07-31 Gen Electric Improvements in aromatic polycarbonates
US3832396A (en) 1966-03-29 1974-08-27 Monsanto Co Anhydrides of organo-phosphonic acids
NL152889B (nl) 1967-03-10 1977-04-15 Gen Electric Werkwijze ter bereiding van een lineair polycarbonaatcopolymeer, alsmede orienteerbare textielvezel van dit copolymeer.
US3494885A (en) 1967-12-18 1970-02-10 Eastman Kodak Co Polycarbonate and polyester compositions stabilized with substituted phenothiazines
DE2036052A1 (en) 1970-07-21 1972-01-27 Milchwirtschafthche Forschungs und Untersuchungs Gesellschaft mbH, 2100 Hamburg Working up of additives in fat and protein - contng foodstuffs
DE2063050C3 (de) 1970-12-22 1983-12-15 Bayer Ag, 5090 Leverkusen Verseifungsbeständige Polycarbonate, Verfahren zu deren Herstellung und deren Verwendung
JPS5252584Y2 (fr) 1971-07-20 1977-11-30
DE2211956A1 (de) 1972-03-11 1973-10-25 Bayer Ag Verfahren zur herstellung verseifungsstabiler blockcopolycarbonate
JPS54142271A (en) * 1978-04-28 1979-11-06 Kureha Chem Ind Co Ltd Multi-layer blow molded article
US4294956A (en) 1979-08-27 1981-10-13 Union Carbide Corporation Process for preparing polyarylates in the presence of a diphenyl ether
US4296232A (en) 1979-08-27 1981-10-20 Union Carbide Corporation Process for preparing polyarylates in the presence of a diphenyl ether compound and a catalyst
US4294957A (en) 1979-08-27 1981-10-13 Union Carbide Corporation Process for preparing polyarylates
US4281099A (en) 1979-10-29 1981-07-28 Union Carbide Corporation Process for stabilizing polyarylates with an aromatic phenol
US4314051A (en) 1980-05-05 1982-02-02 Union Carbide Corporation Process for preparing polyarylates
CA1214588A (fr) 1981-11-09 1986-11-25 Union Carbide Corporation Preparation de polyesters ou de poly(esters- carbonates) en presence d'un agent de traitement
US4386186A (en) 1982-03-29 1983-05-31 Union Carbide Corporation Process for preparing polyarylates
US4439586A (en) 1982-06-30 1984-03-27 Union Carbide Corporation Process for preparing polyarylates
DE8233007U1 (de) 1982-11-25 1983-03-24 Röhm GmbH, 6100 Darmstadt Polycarbonat-kunststofftafel
DE3244953C2 (de) 1982-12-04 1984-11-29 Röhm GmbH, 6100 Darmstadt Verfahren zur Herstellung einer Hohlkammerkunststofftafel
DE3346945A1 (de) 1983-12-24 1985-07-04 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von aromatischen polyestercarbonaten
EP0156103A1 (fr) 1984-01-24 1985-10-02 General Electric Company Procédé pour la polymérisation de polyestercarbonates
ATE67120T1 (de) * 1985-03-11 1991-09-15 Amoco Corp Schichtstoffkochgeschirr.
US4746710A (en) * 1985-09-06 1988-05-24 Amoco Corporation Shaped article formed from a blend of a poly(aryl ether) and a polycarbonate and/or a polyarylate
US4680372A (en) 1986-02-25 1987-07-14 Celanese Corporation In-situ end-capping melt prepared aromatic polyester with phenyl benzoate
US4680371A (en) 1986-02-25 1987-07-14 Celanese Corporation Preparation of aromatic polyester with improved stability by addition of phosphite during preparation
EP0263854A4 (fr) * 1986-03-24 1988-11-02 Amoco Corp Stratifie contenant des dechets co-extrudes.
US4661580A (en) 1986-04-01 1987-04-28 Celanese Corporation Oxygen desorption for improved color of polyesters
DE3617978A1 (de) 1986-05-28 1987-12-03 Bayer Ag Verzweigte thermoplastische polycarbonate mit verbessertem schutz gegen uv-licht
DE3739765A1 (de) 1987-11-24 1989-06-08 Bayer Ag Beschichtete formkoerper und ein verfahren zu ihrer herstellung
US4887682A (en) * 1988-01-06 1989-12-19 Trw Inc. Method and apparatus for nullifying electrical offsets in a torsion sensor
NO170326C (no) 1988-08-12 1992-10-07 Bayer Ag Dihydroksydifenylcykloalkaner
DE3844633A1 (de) 1988-08-12 1990-04-19 Bayer Ag Dihydroxydiphenylcycloalkane, ihre herstellung und ihre verwendung zur herstellung von hochmolekularen polycarbonaten
DE3833385A1 (de) 1988-10-01 1990-04-05 Bayer Ag Aromatische polyethersulfone
US5104964A (en) 1989-08-03 1992-04-14 Idemitsu Petrochemical Co., Ltd. Branched polycarbonate having branching parameter and degree of branching
TW222292B (fr) 1991-02-21 1994-04-11 Ciba Geigy Ag
DE4433072A1 (de) * 1994-09-16 1996-03-21 Basf Ag Thermoplastische Formmassen auf der Basis von Polyarylenethern und aromatischen Polycarbonat-Recyclaten
JP3618152B2 (ja) * 1995-09-22 2005-02-09 ジャパンゴアテックス株式会社 液晶ポリマー層を有する中空成形品
WO1999033634A1 (fr) * 1997-12-26 1999-07-08 Nippon Steel Chemical Co., Ltd. Dispositif de moulage par soufflage et procede de moulage
MY119540A (en) 1998-04-24 2005-06-30 Ciba Spacialty Chemicals Holding Inc Increasing the molecular weight of polyesters
DE19933128A1 (de) 1999-07-19 2001-01-25 Bayer Ag Polycarbonat und dessen Formkörper
DE19933132A1 (de) 1999-07-19 2001-01-25 Bayer Ag Verfahren zur Herstellung von modifizierten Polycarbonaten
DE19943643A1 (de) 1999-09-13 2001-03-15 Bayer Ag Behälter aus Polycarbonat
DE19943642A1 (de) 1999-09-13 2001-03-15 Bayer Ag Behälter
US20020182352A1 (en) * 2001-05-23 2002-12-05 Mitten Michael R. Multi-layer plastic articles and methods of making the same
US20040198893A1 (en) * 2001-06-18 2004-10-07 Nelson Roger W. Container for alkaline solution
DE10216175C1 (de) * 2002-04-12 2003-07-24 Stiebel Eltron Gmbh & Co Kg Bauteil, insbesondere Behälter oder Rohr, und Verfahren zur Herstellung eines Behälters
US6984442B2 (en) * 2002-07-19 2006-01-10 Cryovac, Inc. Multilayer film comprising an amorphous polymer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008113479A1 *

Also Published As

Publication number Publication date
WO2008113479A1 (fr) 2008-09-25
DE102007013273A1 (de) 2008-09-18
MX2009009770A (es) 2009-09-23
WO2008113479A9 (fr) 2010-01-21
US8414823B2 (en) 2013-04-09
CN101631662A (zh) 2010-01-20
US20100086716A1 (en) 2010-04-08

Similar Documents

Publication Publication Date Title
EP2139664A1 (fr) Procédé de fabrication de récipients multicouches
EP1218436B1 (fr) Contenant realise en polycarbonate ramifie
EP2558515B1 (fr) Compositions de polycarbonates à propriétés optiques et thermiques améliorées
EP3247743B1 (fr) Masses de formages ignifuges, contenant de la fibre de verre comprenant un co-condensat séquencé de polycarbonate contenant du siloxane
EP2098553B1 (fr) Procédé destiné à la fabrication de polycarbonate selon le procédé de surfaces de limite de phases
DE102008008841A1 (de) Verfahren zur Herstellung von Polycarbonaten
WO2016087477A1 (fr) Compositions de polycarbonate contenant des cires de polyéthylène
EP2333014B1 (fr) Film obtenu à partir d'une composition de polycarbonate
EP2114672A1 (fr) Matériau composite multicouche comprenant une couche de polycarbonate
EP3707209B1 (fr) Composition thermoplastique à charge minérale ayant de bonnes propriétés mécaniques
EP3097135B1 (fr) Procédé destiné à la fabrication de polycarbonate selon le procédé de surfaces de limite de phases
DE102006051306A1 (de) Substratmaterialien für Extrusionsfolien mit geringen Oberflächenstörungen
EP3502183B1 (fr) Compositions de polycarbonate chargées de talc
EP2955201A1 (fr) Compositions à base de polycarbonate renforcées en fibres de verre
EP3247742B1 (fr) Masses de formages ignifuges, contenant un co-condensat séquencé de polycarbonate contenant du siloxane
EP2742092B1 (fr) Composition polymère remplie et plaque coextrudée étant obtenue à partir de celle-ci
EP3555210A1 (fr) Compositions thermoplastiques présentant de bonnes propriétés mécaniques
EP4367163B1 (fr) Polycarbonate ayant des groupes terminaux carboxy et procédé de production de polycarbonate
DE102004002523A1 (de) Polyformale und Copolyformale als Hydrolyseschutzschicht auf Polycarbonat
DE10249270B4 (de) Rücklöseverfahren
EP3985047A1 (fr) Procédé de fabrication d'un polycarbonate selon le procédé d'interphase par échange des solvants
DE10248951A1 (de) Herstellung von Polycarbonat mit Hilfe eines Filtrationskonzeptes
EP1277780A1 (fr) Traitement de solutions de polymères après synthèse
DE10248021A1 (de) Verfahren zur Herstellung von Polycarbonat nach dem Phasengrenzflächenverfahren mit Verweiltank
DE10249269A1 (de) Verfahren zur Herstellung von Polycarbonaten unter Rückführung von Polycar-bonatlösung aus Abwasser-und Abfallströmen in den Herstellungsprozess

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20091016

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20100630

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BAYER INTELLECTUAL PROPERTY GMBH

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130531

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20130719