EP2566905A1 - Élastomères de polyuréthane, leur procédé de fabrication et leur utilisation - Google Patents

Élastomères de polyuréthane, leur procédé de fabrication et leur utilisation

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Publication number
EP2566905A1
EP2566905A1 EP11717624A EP11717624A EP2566905A1 EP 2566905 A1 EP2566905 A1 EP 2566905A1 EP 11717624 A EP11717624 A EP 11717624A EP 11717624 A EP11717624 A EP 11717624A EP 2566905 A1 EP2566905 A1 EP 2566905A1
Authority
EP
European Patent Office
Prior art keywords
polyisocyanate
monomeric
stopper
reacted
trimerization catalyst
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Withdrawn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
EP11717624A
Other languages
German (de)
English (en)
Inventor
Jens Krause
Manfred Schmidt
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 Intellectual Property GmbH
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 Intellectual Property GmbH filed Critical Bayer Intellectual Property GmbH
Publication of EP2566905A1 publication Critical patent/EP2566905A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C08G18/02—Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only
    • 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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7692—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing at least one isocyanate or isothiocyanate group linked to an aromatic ring by means of an aliphatic group
    • 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
    • C08G18/02—Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only
    • C08G18/022—Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only the polymeric products containing isocyanurate groups
    • 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
    • C08G18/08—Processes
    • 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
    • C08G18/08—Processes
    • C08G18/089—Reaction retarding agents
    • 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
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • 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
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
    • 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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • 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
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
    • C08G18/794—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aromatic isocyanates or isothiocyanates
    • 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

Definitions

  • the present invention relates to cellular and non-cellular polyurethane (PUR) elastomers of NCO-functional prepolymers based on polyisocyanates with proportions of trimers, a process for their preparation and their use.
  • PUR polyurethane
  • Polyurethane elastomers are used in numerous wear-prone applications.
  • wear due to, for example, abrasion and / or lack of tear propagation resistance in dynamic applications, e.g. Rollers, wheels, gaskets, cellular buffer elements and cellular shoe soles, wear due to deformation and / or heat build-up after a certain number of repeated loads. These loads usually occur periodically. This leads to high permanent deformations, which make further use impossible.
  • the internal heat build-up (by non-elastic interactions) may be so high that the polyurethane heats up to burst under stress. It is also known that by increasing the functionality of the polyol above 2, the dynamic resistance increases, but at the same time the tear values decrease so much that the elastomer is destroyed by non-dynamic wear phenomena.
  • the object of the invention was therefore to provide an elastomer available which has a low functionality and at the same time shows a very good tear strength and a very good dynamic behavior.
  • the invention relates to a process for the preparation of polyurethane elastomers, which is characterized in that a) monomeric polyisocyanate is reacted by means of a trimerization catalyst in an amount of 0, 1 to 2000 ppm, based on monomeric polyisocyanate, wherein the reaction with the trimerization catalyst at a content of 0.01 to 5.0 wt .-% of reacted polyisocyanate, based on the total polyisocyanate, by means of a stopper, which is used in a molar ratio of stopper to trimerization catalyst of 1: 2 to 20: 1 is stopped .
  • the mixture of monomeric and reacted polyisocyanate from a) is reacted with polyols having OH numbers of 20 to 200 mg KOH / g and functionalities of 1.95 to 2.40 to give an NCO-terminated prepolymer
  • polyols having OH numbers of 20 to 200 mg KOH / g and functionalities of 1.95 to 2.40 to give an NCO-terminated prepolymer
  • the NCO- terminated prepolymer is reacted with chain extenders and / or crosslinkers to polyurethane elastomer, wherein the monomeric polyisocyanate and / or the polyols may optionally contain auxiliaries and / or additives.
  • Another object of the invention is a process for the preparation of NCO-terminated prepolymers, which is characterized in that a) monomeric polyisocyanate by means of a trimerization catalyst in an amount of
  • Another object of the invention is a process for the preparation of mixtures of monomeric and non-monomeric polyisocyanates, which is characterized in that a) monomeric polyisocyanate by means of a trimerization catalyst in an amount of 0, 1 to 2000 ppm, based on monomeric polyisocyanate, is reacted wherein the reaction with the trimerization catalyst at a proportion of 0.01 to 5.0 wt .-% of reacted polyisocyanate, based on the total polyisocyanate, by means of a stopper, in a molar ratio of stopper to Trimer Deutschenskatalysator of 1: 2 to 20: 1 is used is stopped, wherein the monomeric polyisocyanate may optionally contain auxiliaries and / or additives.
  • the invention also polyurethane elastomers, which are available from a) a mixture of monomeric and non-monomeric polyisocyanate in a proportion of 0.01 to 5.0 wt .-% of non-monomeric polyisocyanate, based on the total polyisocyanate, wherein the mixture is obtainable from monomeric polyisocyanate by means of a trimerization catalyst in an amount from 0, 1 to 2000 ppm, based on monomeric polyisocyanate, and by means of a stopper in a molar ratio of stopper to trimerization catalyst of 1: 2 to 20: 1, b) polyols having OH numbers of 20 to 200 mg KOH / g and Functionalities of 1.95 to 2.40 and c) chain extenders and / or crosslinkers, d) optionally in the presence of auxiliaries and / or additives.
  • NCO-terminated prepolymers which are obtainable from a) a mixture of monomeric and non-monomeric polyisocyanate in a proportion of 0.01 to 5.0 wt .-% of non-monomeric polyisocyanate, based on the total polyisocyanate wherein the mixture is obtainable from monomeric polyisocyanate by means of a trimerization catalyst in an amount of 0, 1 to 2000 ppm, based on monomeric polyisocyanate, and by means of a stopper in a molar ratio of stopper to trimerization catalyst from 1: 2 to 20: 1, and b) polyols having OH numbers of 20 to 200 mg KOH / g and functionalities of 1.95 to 2.40, d) optionally in the presence of auxiliaries and / or additives.
  • Another object of the invention are mixtures of monomeric and non-monomeric polyisocyanate in a proportion of 0.01 to 5.0 wt .-% of non-monomeric polyisocyanate, based on the total polyisocyanate, obtainable from a) monomeric polyisocyanate by means of a trimerization catalyst in one Amount of 0.1 to 2000 ppm, based on monomeric polyisocyanate, and by means of a stopper in a molar ratio of stopper to trimerization catalyst of 1: 2 to 20: 1.
  • the reaction is carried out by means of customary trimerization catalysts, as described in Houben-Weyl, Methods of Organic Chemistry, Volume E20, Part 2, Georg Thieme Verlag, Stuttgart, 1987, pp. 1739-1751, such as quaternary ammonium hydroxides, benzyldimethyl amine, triethylamine, Mannich bases of phenols or mixtures of these catalysts.
  • customary trimerization catalysts such as described in Houben-Weyl, Methods of Organic Chemistry, Volume E20, Part 2, Georg Thieme Verlag, Stuttgart, 1987, pp. 1739-1751, such as quaternary ammonium hydroxides, benzyldimethyl amine, triethylamine, Mannich bases of phenols or mixtures of these catalysts.
  • phenol Mannich bases are used, which can be obtained by reacting phenol or bisphenol A with dimethylamine and formaldehyde.
  • the trimerization catalyst can be dissolved in a solvent such as toluene, ethyl acetate, alcohol (eg, methanol, ethanol and 2-ethyl-1-hexanol), ethers or polyethers, phosphoric acid esters such as tris (2-chloroisopropyl) phosphate (TCPP) or Triethyl phosphate (TEP) are present.
  • a solvent such as toluene, ethyl acetate, alcohol (eg, methanol, ethanol and 2-ethyl-1-hexanol), ethers or polyethers, phosphoric acid esters such as tris (2-chloroisopropyl) phosphate (TCPP) or Triethyl phosphate (TEP) are present.
  • the reaction is stopped, preferably with Broenstedt or Lewis acids, such as hydrochloric acid, benzoyl chloride or organomercinic acids, e.g. Dibutyl phosphate.
  • Broenstedt or Lewis acids such as hydrochloric acid, benzoyl chloride or organomercinic acids, e.g. Dibutyl phosphate.
  • the polyurethane elastomers according to the invention have very good dynamic properties combined with good mechanical-physical properties.
  • the polyurethane elastomers according to the invention are preferably used as cast elastomers for the production of, for example, rollers, wheels and conveyor belts.
  • the polyurethane elastomer parts are produced by the casting process.
  • the NCO-terminated prepolymers are first prepared.
  • the NCO-terminated prepolymers are reacted either directly after their preparation with a chain extender / crosslinker, or they are cooled to low temperatures (storage temperature) for the purpose of subsequent chain extension / V ernetzung and stored.
  • the NCO-terminated prepolymers are first degassed by applying a reduced pressure at room temperature or at elevated temperature and then reacted - usually at elevated temperature - with the chain extender / V ernetzer.
  • the NCO-terminated prepolymer is preferably heated to a temperature of 60 ° C to 110 ° C and degassed with stirring under vacuum. Thereafter, the chain extender and / or crosslinker is added in liquid form, which is optionally heated to temperatures of typically at least 5 ° C above its melting point.
  • This reaction mixture is preferably poured into preheated molds (preferably 90 ° C to 120 ° C) and held at 90 ° C to 140 ° C for about 24 hours.
  • the NCO-functional prepolymers are preferably prepared from the following polyisocyanates: NDI (1,5-naphthalene diisocyanate), TDI (2,4- and 2,6-toluene diisocyanate or mixtures thereof), MDI (2,2'-, 2,4 ') and 4,4'-MDI or mixtures thereof), TODI (3,3'-dimethyl-4,4'-biphenyl diisocyanate), PPDI (1, 4-paraphenylene diisocyanate) and CHDI (cyclohexyl diisocyanate) and mixtures of the polyisocyanates and / or modified compounds of the polyisocyanates, such as uretonimines, polymers of isocyanates (polymeric MDI, such as Desmodur ® 44V20L from Bayer MaterialScience AG) or other modified isocyanates.
  • polyisocyanates such as uretonimines, polymers of isocyanates (polymeric MDI,
  • aliphatic isocyanates such as isophorone diisocyanate, ring-hydrogenated MDI (Desmodur ® W), and hexamethylene diisocyanate and derivatives of these isocyanates may be used or added.
  • the NCO-functional prepolymers are prepared with an excess of isocyanate.
  • the free isocyanate is removed, so that the content of free isocyanate is reduced to ⁇ 1% by weight, preferably to ⁇ 0.1% by weight.
  • the removal is usually carried out in vacuo (for example by thin layers of short and / or falling film evaporator).
  • this entrainment agents can be used. This can e.g. a solvent or gas, e.g. Be nitrogen.
  • NCO prepolymers thus obtained may be blended, and as Wegkom- ponentiges system, for example, with blocked amines, such as diaminodiphenylmethane blocked (eg Caytur ® 31) (partially in the literature also referred to as component system) verwen- be det.
  • blocked amines such as diaminodiphenylmethane blocked (eg Caytur ® 31) (partially in the literature also referred to as component system) verwen- be det.
  • polyols it is possible to use, for example, polyether, polyester, polycarbonate and polyetherester polyols having hydroxyl numbers (OH numbers) of 20 to 200 mg KOH / g, preferably 27 to 150, particularly preferably 27 to 120.
  • OH numbers hydroxyl numbers
  • Polyether polyols are prepared either by alkaline catalysis or by Doppelmetallcyanid- catalysis or optionally in stepwise reaction by alkaline catalysis and Doppelmetallcyamdkatalyse of a starter molecule and epoxides, preferably ethylene and / or propylene oxide and have terminal hydroxyl groups.
  • Suitable starters are the compounds with hydroxyl and / or amino groups known to those skilled in the art, as well as water. The functionality of the starter is at least 2 and at most 4. Of course, mixtures of multiple starters can be used.
  • mixtures of several polyether polyols can be used as polyether polyols.
  • polyether polyols based on C p preference is given to using polyether polyols based on C p, for example polytetrahydrofuran become.
  • C3-polyols based on 1,3-propylene glycol preference is given to using so-called C3-polyols based on 1,3-propylene glycol.
  • Polyester polyols are prepared in a conventional manner by polycondensation of alipahtic and / or aromatic polycarboxylic acids having 4 to 16 carbon atoms, optionally from their anhydrides and optionally from their low molecular weight esters, including ring esters, being used as the reaction component predominantly low molecular weight polyols having 2 to 12 carbon atoms come.
  • the functionality of the synthesis components for polyester polyols is preferably 2, but in individual cases may be greater than 2, wherein the components are used with functionalities greater than 2 only in small amounts, so that the arithmetic number average functionality of polyester polyols in the range of 2 to 2.5, preferably 2 to 2.1.
  • Polyetheresterpolyole be prepared for example by concomitant use of polyether polyols in the Polyesterpolyolsynthese.
  • Polycarbonate polyols are prepared according to the prior art e.g. from carbonic acid derivatives, e.g. Dimethyl or diphenyl carbonate or phosgene and polyols obtained by polycondensation.
  • carbonic acid derivatives e.g. Dimethyl or diphenyl carbonate or phosgene
  • chain extenders and / or crosslinkers e.g. aromatic aminic substances, e.g. Diethyltoluenediamine (DETDA), 3,3'-dichloro-4,4'-diaminodiphenylmethane (MBOCA), 3,5-diamino-4-chloro-isobutylbenzoate, 4-methyl-2,6-bis (methylthio) -l , 3-diaminobenzene (Ethacure 300), trimethylene glycol di-p-aminobenzoate (Polacure 740M) and 4,4'-diamino-2,2'-dichloro-5,5'-diethyldiphenylmethane (MCDEA) and 4,4 '- Diamino-diphenylmethane (MDA) or salt-blocked MDA (Caytur 21, 31, etc.
  • aromatic aminic substances e.g. Diethyltoluenediamine (DETDA), 3,
  • Aliphatic aminic chain extenders and / or crosslinkers may also be used or co-used.
  • chain extenders and / or crosslinkers from the group of polyols such as 1,2-ethanediol, 1, 2-propanediol, 1, 3-propanediol, 1, 4-butanediol, glycerol, trimethylolpropane and mixtures thereof can be used. Particular preference is given to using 1,4-butanediol as chain extender.
  • auxiliaries and additives such as catalysts, stabilizers, UV protectants, hydrolysis protectants, emulsifiers, preferably incorporable dyes and color pigments, cell regulators and fillers can be used.
  • catalysts are trialkylamines, diazabicyclooctane, tin dioctoate, dibutyltin dilaurate, N-alkylmorpholine, lead, zinc, calcium, magnesium octoate, the corresponding naphthenates and p-nitrophenolate.
  • stabilizers are Broenstedt and Lewis acids, such as hydrochloric acid, benzoyl chloride, Organomineralklaren, for example, dibutyl phosphate, adipic acid, malic acid, succinic acid, racemic acid or citric acid.
  • Lewis acids such as hydrochloric acid, benzoyl chloride, Organomineralklaren, for example, dibutyl phosphate, adipic acid, malic acid, succinic acid, racemic acid or citric acid.
  • UV protectants and hydrolysis protectants are 2,6-dibutyl-4-methylphenol and sterically hindered carbodiimides.
  • Incorporatable dyes are those which have Zerewitinoff-active hydrogen atoms, so can react with NCO groups.
  • polyurethane elastomers prepared according to the invention are preferred for the production of cast elastomers such as rollers, wheels, rollers, hydrocyclones, sieves, pigs and cellular and non-cellular elastomers for buffer elements.
  • Polyester molecular weight ethylene butylene adipates Mono 2000 g / mol based on, Desmophen ® 2001 KS from Bayer MaterialScience AG
  • the MDI was initially introduced at 60 ° C., admixed with 200 ppm based on MDI, catalyst and stirred for 1 hour 30 minutes. Thereafter, the reaction was treated with a 1.5 molar excess of stoppers.
  • the NCO content was determined to be 32.9% by weight. 34.218 parts by weight of this mixture were added at 60 ° C with 65.682 parts by weight of polyester polyol at 60 ° C and reacted with stirring for 3 hours at 80 ° C with each other.
  • the NCO content of the prepolymer was determined to be 8.42% by weight.
  • the prepolymer contained undissolved particles and could be processed by hand into an elastomer.
  • Prepolymer 2 (according to the invention):
  • prepolymer 1 A portion of prepolymer 1 was removed and filtered so that undissolved particles are no longer present. Particles may be annoying when machined.
  • the NCO content was determined to be 8.40% by weight.
  • Prepolymer 3 (according to the invention):
  • the MDI was initially charged at 60 ° C., admixed with 50 ppm, based on MDI, catalyst, and stirred for 1 hour 30 minutes. Thereafter, the reaction was treated with a 1.5 molar excess of stoppers.
  • the NCO content was determined to be 33.5% by weight. 33.72 parts by wt. MDI were added at 60 ° C with 66.28 wt. Parts Polyesterpolyol at 60 ° C and reacted with stirring for 3 hours at 80 ° C with each other.
  • the NCO content of the prepolymer was determined to be 8.50% by weight.
  • the prepolymer contained no undissolved particles.
  • Prepolymer 4 (not according to the invention):
  • Polyurethane elastomer prepoly- prepolyPrepolyPrepolymer4 mer 1 mer 2 mer 3
  • Table 2 Dynamic results of the polyurethane elastomers Cylinders made of polyurethane elastomer with a diameter of 18 mm and a height of 25 mm were tested in each case. The cylinder was pulsed with a force of 1, 2 kN and a fixed frequency at an amplitude of 0.8 kN. The test was stopped at a deformation of 60%.
  • the systems according to the invention have a unique combination of advantageous properties with respect to prepolymer viscosity, casting time, mechanical and mechanical-dynamic properties.

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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)

Abstract

La présente invention concerne des élastomères de polyuréthane (PUR) cellulaires et non cellulaires constitués de prépolymères à fonction NCO à base de polyisocyanates avec des fractions de non-monomères, leur procédé de fabrication et leur utilisation.
EP11717624A 2010-05-07 2011-05-02 Élastomères de polyuréthane, leur procédé de fabrication et leur utilisation Withdrawn EP2566905A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010019701 2010-05-07
PCT/EP2011/056955 WO2011138275A1 (fr) 2010-05-07 2011-05-02 Élastomères de polyuréthane, leur procédé de fabrication et leur utilisation

Publications (1)

Publication Number Publication Date
EP2566905A1 true EP2566905A1 (fr) 2013-03-13

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Country Status (9)

Country Link
US (1) US20130109830A1 (fr)
EP (1) EP2566905A1 (fr)
JP (1) JP2013525583A (fr)
KR (1) KR20130103337A (fr)
CN (1) CN102933631A (fr)
MX (1) MX2012012904A (fr)
RU (1) RU2012152518A (fr)
WO (1) WO2011138275A1 (fr)
ZA (1) ZA201209249B (fr)

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CN113997590A (zh) * 2021-11-09 2022-02-01 衡水众一机械设备有限公司 一种新型热塑型材料制作水力旋流器的新型制作工艺

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DE69025028T2 (de) * 1989-05-16 1996-07-18 Nippon Polyurethane Kogyo Kk Verfahren zur herstellung modifizierter organischer polyisocyanate
DE19548771A1 (de) * 1995-12-23 1997-06-26 Basf Ag Mikrozelluläres, harnstoffgruppenhaltiges Polyurethanelastomer
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RU2012152518A (ru) 2014-06-20
KR20130103337A (ko) 2013-09-23
CN102933631A (zh) 2013-02-13
US20130109830A1 (en) 2013-05-02
ZA201209249B (en) 2014-05-28
WO2011138275A1 (fr) 2011-11-10
JP2013525583A (ja) 2013-06-20

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