PHASE-SEGMENTED NON-ISOCYANATE ELASTOMERS

摘要

Elastomers are prepared from a reaction mixture that contains a polyene compound, an epoxy resin, a thiol curing agent and a basic catalyst. The polyene compound has an average of at least two groups containing aliphatic carbon-carbon double bonds capable of reaction with a thiol group. At least one of said aliphatic carbon-carbon double bonds is separated from each other said aliphatic carbon-carbon double bond by an aliphatic spacer group having a weight of at least 500 atomic mass units. These elastomers are typically phase-separated materials having good elongation and tensile properties.

主权项

1. A process for forming an elastomeric polymer, comprising a) forming a reaction mixture containing 1) at least one ene-terminated polyether having a molecular weight of 4,000 to 8,000, 2 to 6 aliphatic carbon-carbon double bonds capable of reaction with a thiol group, wherein at least one of said aliphatic carbon-carbon double bonds is separated from each other said aliphatic carbon-carbon double bond by an aliphatic spacer group having a weight of at least 1000 atomic mass units, 2) from 20 to 150 parts by weight, per 100 parts by weight of component 1), of at least one epoxy resin having an average of at least 1.5 epoxide groups per molecule and an epoxy equivalent weight of up to 1000, 3) at least one curing agent having at least two thiol groups, 4) at least one basic catalyst, and b) curing the reaction mixture to form the polymeric elastomer.