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Weather resistant polyurethane elastomer

A technology of polyurethane elastomers and elastomers, applied in the field of polyurethane elastomers, can solve problems such as no working examples

Inactive Publication Date: 2008-12-10
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While various patents generally disclose cycloaliphatic isocyanates in a long list of isocyanates described as being suitable for the RIM process, few patents mention any working examples using cycloaliphatic isocyanates

Method used

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  • Weather resistant polyurethane elastomer
  • Weather resistant polyurethane elastomer
  • Weather resistant polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] Isocyanate A: A trimer of isophorone diisocyanate with an NCO group content of about 30%,

[0082] Functionality is about 2.3, catalyzed by N,N,N-trimethylbenzene-methylammonium hydroxide

[0083] Preparation of partial trimerization of isophorone diisocyanate in the presence of

[0084] The proportion of the body is about 65% by weight: 35% by weight

[0085] Polyol A: Polyether polyols having a nominal functionality of about 3 and a molecular weight of about 6000,

[0086] The OH value is about 28 and the maximum unsaturation content is about 0.005 meq / g.

[0087]The polyether polyol comprises the reaction product of glycerol with propylene oxide / ethylene oxide

[0088] Compounds, containing about 20% EO capping, in the presence of double metal cyanide catalysts

[0089] Made under.

[0090] Polyol B: Crosslinking agent with a nominal functionality of a...

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Abstract

This invention relates to polyurethane elastomers and to a process for their production. These elastomers comprise the reaction product of a (cyclo)aliphatic isocyanate component having an NCO group content of about 20 to about 45%, with an isocyanate-reactive component comprising one or more low unsaturation polyether polyols, a low molecular weight organic compound containing two hydroxyl groups and which is free of amine groups, and, optionally, one or more organic compounds having a molecular weight of about 200 to about 500, a hydroxyl functionality of 3 to 4 and comprising an amine-initiated polyether polyol.

Description

Background of the invention [0001] The present invention relates to a polyurethane elastomer with improved weather resistance and a production method thereof. [0002] The production of polyurethane molded articles by reaction injection molding (ie RIM) technology is well known and described, for example, in US Patent 4,218,543. The RIM method involves a mold-filling technique by which highly active liquid starting components are mixed in a very short time using high-output, high-pressure metering equipment after they have been mixed in a so-called "fully controlled mixing head" Inject into the mold. [0003] In the production of polyurethane moldings by the RIM process, the reaction mixture generally comprises a part A based on a polyisocyanate and a part B based on an organic compound containing isocyanate-active hydrogen atoms, and suitable chain extenders, catalysts, Foaming agents and other additives. Polyisocyanates suitable for commercial RIM processes are aromatic i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/20C08G18/48
CPCC08G18/482C08G18/4841C08G18/4866C08G18/5024C08G18/6674C08G18/792C08G2120/00C08G18/79C08G18/20C08G18/48C08G18/24
Inventor S·J·哈拉辛R·R·罗斯勒R·V·斯塔彻C·L·金尼J·T·加勒特
Owner BAYER MATERIALSCIENCE AG
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