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EP0000761B1 - Procédé de préparation de mousses de polyuréthane - Google Patents

Procédé de préparation de mousses de polyuréthane Download PDF

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Publication number
EP0000761B1
EP0000761B1 EP78100555A EP78100555A EP0000761B1 EP 0000761 B1 EP0000761 B1 EP 0000761B1 EP 78100555 A EP78100555 A EP 78100555A EP 78100555 A EP78100555 A EP 78100555A EP 0000761 B1 EP0000761 B1 EP 0000761B1
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EP
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Prior art keywords
compounds
weight
polyisocyanates
groups
mixtures
Prior art date
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Expired
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EP78100555A
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German (de)
English (en)
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EP0000761A1 (fr
Inventor
Hans-Joachim Dr. Meiners
Hans-Heinrich Dr. Moretto
Armand Dr. De Montigny
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Bayer AG
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Bayer AG
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/6552—Compounds of group C08G18/63
    • C08G18/6558—Compounds of group C08G18/63 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6564—Compounds of group C08G18/63 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0042—Use of organic additives containing silicon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0008—Foam properties flexible
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0041—Foam properties having specified density
    • C08G2110/005—< 50kg/m3
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0083—Foam properties prepared using water as the sole blowing agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers

Definitions

  • Foams containing urethane groups are widely used, e.g. in the field of insulation, for the production of structural elements or for upholstery purposes.
  • urethane group-containing foams made from higher molecular weight polyols, e.g. To produce hydroxyl-containing polyethers, polyisocyanates, water and / or other blowing agents in the presence of catalysts, emulsifiers and auxiliaries in blocks and in formula.
  • the task of the emulsifiers and stabilizers in the reaction mixture is to homogenize the reactants and to facilitate the simultaneous foaming process and to prevent the foams from collapsing after the end of gas formation.
  • the catalysts are intended to ensure that the processes taking place during the foam formation are brought into the desired equilibrium and run at the correct speed.
  • hydroxyl groups containing polyethers in which at least about 10% of the OH groups present are primary OH groups and which e.g. have a molecular weight of 400-10000 or polyethers grafted with organic, unsaturated compounds in combination with the polyisocyanates, special polyisocyanates being used in many cases.
  • Special polyisocyanates include In addition to 2,4- and / or 2,6-tolylene diisocyanate, mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates (raw MDI), combinations of tolylene diisocyanates and polyphenylpolymethylene polyisocyanates, also so-called "modified polyisocyanates" in question, e.g.
  • the foams known to date which have urethane groups and are produced, for example, using the "modified polyisocyanates" often have the disadvantage, however, that when they are foamed, they show defects in the form of bubbles under the outer part of the foam part, which can also be found inside can reproduce the foam part.
  • This appearance is extremely disadvantageous. e.g. in the production of molded parts, be it for the furniture industry or automotive industry, because e.g. this blistering clearly shows on fine upholstery fabrics.
  • polysiloxane-polyalkylene oxide copolymers such as are commercially available as foam stabilizers, cannot solve the problem, since in this case, even with the smallest amounts of stabilizers, irreversible shrinkage or collapse occurs and leads to unusable foams.
  • the index a means a whole unbroken number.
  • Formula (I) thus represents discrete compounds (for example with a defined boiling point) and no mixtures of statistical distribution. However, it turns out that these (discrete) compounds do not have a sufficient stabilizing effect. For example, the compound (falling under Formula 1) Purity: 99.8%) not even able to stabilize those (commercial) foam systems that are not very demanding in terms of stabilization.
  • DT-OS 2 533 074 tries to show that (in contrast to the teaching of GB-PS 795 335) the properties of polyurethane foams desired by practice can only be obtained by selecting low-molecular fractions from 4 to a maximum of 12 siloxy units from linear dimethylpolysiloxanes will; Even the smallest amounts of higher molecular weight linear dimethylpolysiloxanes are said to significantly worsen the property profile.
  • the mixtures of organofunctional polysiloxanes to be used according to the invention no restriction of this type in the low and high molecular weight range is necessary.
  • mixtures of compounds to be used according to the invention can be easily and often produced in almost 100% yield by conventional hydrolysis of chlorosilanes, followed by an equilibration known per se.
  • the compound mixtures which are well compatible with foamable polyurethane systems, can be stored without restrictions in polyols, so that there are no problems with storage. They obviously favor the nucleation during the foaming process and give the foam system excellent fluidity, which is the prerequisite for optimal production in the case of the production of foams by shaping with long flow paths or strongly changing cross sections.
  • foams obtained which have excellent physical data but products are also obtained which, when viewed purely subjectively, leave a good impression.
  • the grip and elasticity on the test person are decidedly "personable”.
  • connection mixtures to be used according to the invention can be matched admirably to the corresponding foam systems.
  • the total number of siloxy units is responsible for the stabilizing effect (DT-AS 2 402 691)
  • Suitable starting components according to the invention are aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates, as are described, for example, by W. Siefken in Justus Liebigs Annalen der Chemie, 562, pages 75 to 136, for example ethylene diisocyanate, 1,4 Tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,12-dodecane diisocyanate, cyclobutane-1,3-diisocyanate, cyclohexane-1,3- and -1,4-diisocyanate and any mixtures of these isomers, 1-isocyanato-3,3, 5-trimethyl-5-isocyanatomethyl-cyclohexane (DAS 1 202 785 American patent specification 3 401 190), 2,4- and 2,6-hexahydrotoluenediisocyanate as well as any mixtures of these isomers, hexahydr
  • polyisocyanates prepared by telomerization reactions such as are described, for example, in US Pat. No. 3,654,106, polyisocyanates containing ester groups, as described, for example, in British Patents 956,474 and 1,072,956 in American Patent 3,567,763 and i n of German Patent 1,231,688, reaction products of the above-mentioned isocyanates with acetals according to German Patent 1,072,385 and polymeric fatty acid residues containing polyisocyanates according to American Patent 3,455,883.
  • distillation residues obtained in the technical production of isocyanate and containing isocyanate groups optionally dissolved in one or more of the aforementioned polyisocyanates. It is also possible to use any mixtures of the aforementioned polyisocyanates.
  • polyisocyanates for example the 2,4- and 2,6-tolylene diisocyanate and any mixtures of these isomers (“TDI”), polyphenyl-polymethylene polyisocyanates, such as those obtained from aniline-formaldehyde condensation, are generally particularly preferred and subsequent phosgenation are prepared (“crude MDI”) and carbodiimide groups, urethane groups, allophanate groups, isocyanurate groups, urea groups or biuret groups containing polyisocyanates ("modified polyisocyanates").
  • TDI 2,4- and 2,6-tolylene diisocyanate and any mixtures of these isomers
  • polyphenyl-polymethylene polyisocyanates such as those obtained from aniline-formaldehyde condensation
  • Starting components to be used according to the invention are furthermore compounds having at least two isocyanate-reactive hydrogen atoms with a molecular weight of generally 400-100000.
  • these are preferably polyhydroxyl compounds, in particular two to eight compounds containing hydroxyl groups, especially those having a molecular weight of 800 to 10,000, preferably 1000 to 6000, for example at least two, usually 2 to 8, but preferably 2 to "4, hydroxyl-containing polyesters, polyethers, polythioethers, polyacetals, polycarbonates and polyesteramides as are known per se for the production of homogeneous and cellular polyurethanes. 1
  • the hydroxyl group-containing polyesters are e.g. Reaction products of polyhydric, preferably dihydric and optionally additionally trihydric alcohols with polyhydric, preferably dihydric, carboxylic acids.
  • polyhydric preferably dihydric and optionally additionally trihydric alcohols
  • polyhydric preferably dihydric, carboxylic acids.
  • free polycarboxylic acids it is also possible to use the corresponding polycarboxylic acid anhydrides or corresponding polycarboxylic acid esters of lower alcohols or their mixtures for the preparation of the polyesters.
  • the polycarboxylic acids can be aliphatic, cycloaliphatic, aromatic and / or heterocyclic in nature and optionally, e.g. by halogen atoms, substituted and / or unsaturated.
  • Examples include: succinic acid, adipic acid, suberic acid, azelaic acid, Seba cic acid, phthalic acid, isophthalic acid, trimellitic acid, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrachlorophthalic anhydride, endomethylene tetrahydrophthalic anhydride, glutaric acid anhydride, maleic acid and maleic acid fatty acid, fatty acid mixture, oleic acid fatty acid, fatty acid mixture, such as oleic acid fatty acid, fatty acid mixture, such as oleic acid fatty acid, fatty acid mixture, such as oleic acid fatty acid, fatty acid mixture, such as fatty acid, fatty acid, fatty acid mixture, such as fatty acid, fatty acid, fatty acid mixture, such as fatty acid, fatty acid, fatty acid mixture, such as fatty acid, fatty acid, fatty acid mixture
  • polyethers which are suitable and even preferred according to the invention and which have at least two, generally two to eight, preferably two to three, hydroxyl groups are those of the type known per se and are obtained, for example, by polymerizing epoxides such as ethylene oxide, propylene oxide, butylene oxide and tetrahydrofuran , Styrene oxide or epichlorohydrin with itself, e.g. in the presence of BF 3 , or by the addition of these epoxides, optionally in a mixture or in succession, to starting components with reactive hydrogen atoms such as water, alcohols, ammonia or amines, e.g.
  • epoxides such as ethylene oxide, propylene oxide, butylene oxide and tetrahydrofuran , Styrene oxide or epichlorohydrin
  • Sucrose polyethers such as are described, for example, in German publications 1 176 358 and 1 064 938, are also suitable according to the invention. Polyethers are preferred which have predominantly (up to 90% by weight, based on all the OH groups present in the polyether) primary OH groups.
  • Polyethers modified by vinyl polymers such as those formed by polymerizing styrene and acrylonitrile in the presence of polyethers (American patents 3,383,351, 3,304,273, 3,523,093, 3,110,695, German patent 1,152,536) are also suitable, as are OH -Group polybutadienes.
  • the condensation products of thiodiglycol with themselves and / or with other glycols, dicarboxylic acids, formaldehyde, aminocarboxylic acids or amino alcohols should be mentioned in particular.
  • the products are polythio ether, polythio ether ester or polythio ether ester amide.
  • polyacetals e.g. those from glycols, such as diethylene glycol. Triethylene glycol, 4,4'-dioxäthoxydiphenyldimethylmethan, hexanediol and formaldehyde producible compounds in question.
  • polyacetals suitable according to the invention can also be prepared by polymerizing cyclic acetals.
  • Suitable polycarbonates containing hydroxyl groups are those of the type known per se, which e.g. by reacting diols such as propanediol (1,3), butanediol (1,4) and / or hexanediol (1,6), diethylene glycol, triethylene glycol or tetraethylene glycol with diaryl carbonates, e.g. Diphenyl carbonate, or phosgene can be produced.
  • diols such as propanediol (1,3), butanediol (1,4) and / or hexanediol (1,6)
  • diethylene glycol triethylene glycol or tetraethylene glycol
  • diaryl carbonates e.g. Diphenyl carbonate, or phosgene
  • polyester amides and polyamides include e.g. the predominantly linear condensates obtained from polyvalent saturated and unsaturated carboxylic acids or their anhydrides and polyvalent saturated and unsaturated amino alcohols, diamines, polyamines and their mixtures.
  • Polyhydroxyl compounds which already contain urethane or urea groups and optionally modified natural polyols, such as castor oil, carbohydrates or starch, can also be used. Addition products of alkylene oxides with phenol-formaldehyde resins or also with urea-formaldehyde resins can also be used according to the invention.
  • Compounds with at least two isocyanate-reactive hydrogen atoms with a molecular weight of 32-400 are also suitable as starting components which may be used according to the invention.
  • These compounds generally have 2 to 8 isocyanate-reactive hydrogen atoms, preferably 2 or 3 reactive hydrogen atoms.
  • Examples of such compounds are: ethylene glycol, propylene glycol (1,2) and - (1,3), butylene glycol- (1,4) and - (2,3), pentanediol- (1,5), hexanediol- (1,6), octanediol- (-1,8), neopentylglycol, 1,4-bis-hydroxymethyl-cyclohexane, 2-methyl-1,3-propanediol, glycerol, trimethylolpropane, hexanetriol- (1,2,6), trimethylolethane, pentaerythritol, quinite, mannitol and sorbitol, diethylene glycol, triethylene glycol, tetraethylene glycol, Polyethylene glycols with a molecular weight of up to 400 dipropylene glycol, polypropylene glycols with a molecular weight of up to 400, dibutylene glycol, polybutylene
  • mixtures of different compounds with at least two isocyanate-reactive hydrogen atoms with a molecular weight of 32-400 can be used.
  • polyhydroxyl compounds can also be used in which high molecular weight polyadducts or polycondensates are contained in finely dispersed or dissolved form.
  • modified polyhydroxyl compounds are obtained if polyaddition reactions (e.g. reactions between polyisocyanates and amino-functional compounds) or polycondensation reactions (e.g. between formaldehyde and phenols and / or amines) are carried out directly in situ in the above-mentioned compounds containing hydroxyl groups.
  • water and / or volatile organic substances are also used as blowing agents.
  • organic blowing agents come e.g. Acetone, ethyl acetate, halogen-substituted alkanes such as methylene chloride, chloroform, ethylene chloride, vinylidene chloride, monofluorotrichloromethane, chlorodifluoromethane, dichlorodifluoromethane, butane, hexane, heptane or diethyl ether are also suitable.
  • a blowing effect can also be achieved by adding compounds which decompose at temperatures above room temperature with the elimination of gases, for example nitrogen, e.g. Azo compounds such as azoisobutyronitrile can be achieved.
  • propellants as well as details on the use of propellants can be found in the Kunststoff-Handbuch, Volume VII, published by Vieweg and Höchten, Carl-Hanser-Verlag, Kunststoff 1966, e.g. on pages 108 and 109, 453 to 455 and 507 to 510.
  • catalysts are often also used.
  • Suitable catalysts to be used are those of the type known per se, e.g. tertiary amines, such as triethylamine, tributylamine, N-methylmorpholine, N-ethylmorpholine, N-cocomorpholine, N, N, N ', N'-tetramethyl-ethylenediamine, 1,4-diaza-bicyclo- (2.2 , 2) octane, N-methyl-N'-dimethylaminoethyl-piperazine, N, N-dimethylbenzylamine, bis (N, N-diethylaminoethyl) adipate, N, N-diethylbenzylamine, pentamethyldiethylenetriamine, N, N-dimethylcyclohexylamine, N , N, N ', N'-tetramethyl-1,3-butanediamine, N, N-dimethyl-ß
  • Suitable catalysts are also known Mannich bases from secondary amines, such as dimethylamine, and aldehydes, preferably formaldehyde, or ketones such as acetone, methyl ethyl ketone or cyclohexanone and phenols, such as phenol, nonylphenol or bisphenol.
  • Tertiary amines which have hydrogen atoms active against isocyanate groups as catalysts are e.g. Triethanolamine, triisopropanolamine, N-methyldiethanolamine, N-ethyl-diethanolamine, N, N-dimethyl-ethanolamine, and their reaction products with alkylene oxides, such as propylene oxide and / or ethylene oxide.
  • Silaamines with carbon-silicon bonds such as those e.g. in German Patent 1,229,290 (corresponding to American Patent 3,620,984) are in question, e.g. 2,2,4-trimethyl-2-silamorpholine and 1,3-diethylaminomethyl-tetramethyl-disiloxane.
  • Suitable catalysts are also nitrogen-containing bases such as tetraalkylammonium hydroxides, alkali metal hydroxides such as sodium hydroxide, alkali phenolates such as sodium phenolate or alkali metal alcoholates such as sodium methylate. Hexahydrotriazines can also be used as catalysts.
  • organic metal compounds in particular organic tin compounds, can also be used as catalysts.
  • Preferred organic tin compounds are tin (II) salts of carboxylic acids such as tin (II) acetate, tin (II) octoate, tin (11) ethylhexoate and tin (II) laurate and the tin (IV) compounds, e.g.: Dibutyltin oxide, dibutyltin dichloride, dibutyltin diacetate, dibutyltin dilaurate, dibutyltin maleate or dioctyltin diacetate.
  • tin (II) salts of carboxylic acids such as tin (II) acetate, tin (II) octoate, tin (11) ethylhexoate and tin (II) laurate
  • the tin (IV) compounds e.g.: Dibutyltin oxide, dibutyltin dichloride, dibuty
  • the catalysts are generally used in an amount between about 0.001 and 10 wt .-%, aeration zo g s to the amount of compounds having at least two isocyanate-reactive hydrogen atoms and a molecular weight of 400 to 100,000.
  • surface-active additives such as emulsifiers and foam stabilizers can also be used.
  • the emulsifiers are e.g. the sodium salts of castor oil sulfonates or salts of fatty acids with amines such as oleic acid diethylamine or stearic acid diethanolamine.
  • Alkali or ammonium salts of sulfonic acids such as dodecylbenzenesulfonic acid or dinaphthylmethane disulfonic acid or of fatty acids such as ricinoleic acid or of polymeric fatty acids can also be used as surface-active additives.
  • reaction retarders e.g. acidic substances such as hydrochloric acid or organic acid halides, further cell regulators of the type known per se such as paraffins or fatty alcohols or dimethylpolysiloxanes as well as pigments or dyes and flame retardants of the type known per se, e.g. Tris-chloroethyl phosphate, tricresyl phosphate or ammonium phosphate and polyphosphate, further stabilizers against aging and weather influences, plasticizers and fungistatic and bacteriostatic substances and fillers such as barim sulfate, diatomaceous earth, carbon black or sludge chalk are also used.
  • acidic substances such as hydrochloric acid or organic acid halides
  • cell regulators of the type known per se
  • pigments or dyes and flame retardants e.g. Tris-chloroethyl phosphate, tricresyl phosphate or ammonium phosphate and polyphosphate
  • surface-active additives and foam stabilizers to be used according to the invention as well as cell regulators, reaction retarders, stabilizers, flame-retardant substances, plasticizers, dyes and fillers, as well as fungistatic and bacteriostatic substances, as well as details on the use and mode of action of these additives are given in the Plastics Manual, Volume VII by Vieweg and Höchtlen, Carl-Hanser-Verlag, Kunststoff 1966, e.g. described on pages 103 to 113.
  • reaction components are reacted according to the one-step process, the prepolymer process or the semi-prepolymer process, which are known per se, machine equipment often being used, e.g. those described in U.S. Patent 2,764,565. Details on processing devices which are also suitable according to the invention are given in the plastics manual, volume VII, published by Vieweg and Höchtlen, Carl-Hanser-Verlag, Kunststoff 1966, e.g. described on pages 121 to 205.
  • foaming is often carried out in molds according to the invention.
  • the reaction mixture is introduced into a mold.
  • Metal e.g. Aluminum, or plastic, e.g. Epoxy resin, in question.
  • the foamable reaction mixture foams in the mold and forms the shaped body.
  • the foaming of the mold can be carried out in such a way that the molded part has a cell structure on its surface, but it can also be carried out in such a way that the molded part has a compact skin and a cellular core. According to the invention, one can proceed in this connection in such a way that so much foamable reaction mixture is introduced into the mold that the foam formed just fills the mold.
  • foams can also be produced by block foaming.
  • the products obtainable according to the invention find e.g. Use as upholstery materials.
  • the dried crude product is equilibrated with an acid catalyst.
  • the crosslinking activities are not affected during the foam production, while the blowing activities are only slightly influenced in the last phase (rise time).
  • molded foams can be produced which have no marginal zone defects or bubbles under the surface.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Claims (4)

1. Procédé pour la préparation de mousses à groupes uréthanne ne se rétractant pas, par réaction de composé d'un poids moléculaire de 400 à 100.000, présentant au moins deux atomes d'hydrogène actifs, avec des polyisocyanates en présence d'eau et/ou d'agents porogènes organiques, de composés de silicium et éventuellement en présence de catalyseurs et d'autres additifs, caractérisé en ce que l'on utilise comme composés de silicium des mélanges de composés de formule générale
Figure imgb0030
dans laquelle:
R représente un reste alkyle ou alcényle jusqu'en C3, de préférence un reste méthyle,
R2 représente un reste chlorométhyle,
R1 est un reste R2 ou R,
n est un nombre entier ou fractionnnaire de 0 à 9,
nest un nombre entier ou fractionnnaire de 0 à 9,
n + n'< 10, et

n et n' représentant la composition moyenne des mélanges, qui sont obtenus par hydrolyse connue en soi de chlorosilanes correspondants suivie d'équilibrage, et R1 est égal à R2 lorsque n' est égal à 0, en quantités de 0,01 à 2,0% en poids, de préférence de 0,1 à 1,0% en poids, par rapport aux composés de poids moléculaire de 400 à 100.000 présentant les atomes d'hydrogène actifs.
2. Procédé selon la revendication 1, caractérisé en ce que l'on utilise les composés de silicium en quantités de 0,1 à 1,0% en poids, par rapport aux composés à atomes d'hydrogène actifs, de préférence des polyéthers.
3. Procédé selon les revendications 1 et 2, caractérisé en ce que R dans la formule générale représente un reste méthyle.
4. Procédé selon les revendications 1-3, caractérisé en ce que l'on utilise comme composés d'un poids moléculaire de 400-100.000 présentant des atomes d'hydrogène actifs des polyéthers présentant au moins 2 groupes hydroxyle.
EP78100555A 1977-08-11 1978-07-31 Procédé de préparation de mousses de polyuréthane Expired EP0000761B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2736138 1977-08-11
DE19772736138 DE2736138A1 (de) 1977-08-11 1977-08-11 Verfahren zur herstellung von urethangruppen aufweisenden schaumstoffen

Publications (2)

Publication Number Publication Date
EP0000761A1 EP0000761A1 (fr) 1979-02-21
EP0000761B1 true EP0000761B1 (fr) 1981-11-25

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Family Applications (1)

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EP78100555A Expired EP0000761B1 (fr) 1977-08-11 1978-07-31 Procédé de préparation de mousses de polyuréthane

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Country Link
EP (1) EP0000761B1 (fr)
JP (1) JPS5430299A (fr)
AU (1) AU518959B2 (fr)
BR (1) BR7805123A (fr)
DE (2) DE2736138A1 (fr)
DK (1) DK353478A (fr)
ES (1) ES472468A1 (fr)
IT (1) IT1106871B (fr)
MX (1) MX148879A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614232B2 (ja) * 1983-12-26 1994-02-23 キヤノン株式会社 画像形成法
US4713399A (en) * 1985-12-30 1987-12-15 The Dow Chemical Company Flexible polyurethane foams prepared from poly(alkylene carbonate) polyols
DE3626297C1 (de) * 1986-08-02 1987-07-09 Goldschmidt Ag Th Verfahren zur Herstellung hochelastischer,kalthaertender Polyurethanschaumstoffe
DE4414803C1 (de) * 1994-04-28 1995-10-05 Goldschmidt Ag Th Verfahren zur Herstellung von Polyurethankaltschäumen
DE4444898C1 (de) * 1994-12-16 1996-10-10 Goldschmidt Ag Th Verfahren zur Herstellung von Polyurethankaltschäumen
CN103030809A (zh) * 2012-12-31 2013-04-10 山东大学 一种含氯甲基聚硅氧烷及其合成方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH597270A5 (fr) * 1974-08-30 1978-03-31 Goldschmidt Ag Th

Also Published As

Publication number Publication date
ES472468A1 (es) 1979-03-16
DE2861352D1 (en) 1982-01-28
IT1106871B (it) 1985-11-18
IT7850685A0 (it) 1978-08-09
JPS612085B2 (fr) 1986-01-22
DK353478A (da) 1979-02-12
AU3873478A (en) 1980-02-14
JPS5430299A (en) 1979-03-06
EP0000761A1 (fr) 1979-02-21
DE2736138A1 (de) 1979-03-01
MX148879A (es) 1983-06-29
BR7805123A (pt) 1979-04-10
AU518959B2 (en) 1981-10-29

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