Polysulfide-epoxy thermoplastic elastomers

Details Polysulfide-epoxy thermoplastic elastomers Polysulfide-epoxy thermoplastic elastomers

1995-10-13

1997-03-11

Krass, Frederick

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525535, 528109, 528374, C08G 5966, C08G 8100

Patent

active

056102437

ABSTRACT:
A thermoplastic elastomer is made by the reaction of an epoxy resin with a liquid mercapto-terminated polysulfide wherein the ratio of epoxy equivalents in the epoxy resin to mercapto equivalents is from about 0.6 to about 0.98, with the proviso that when the ratio is greater than about 0.95:1, the polysulfide is further reacted with an amount of a mono-epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents to a maximum of 1:1. An elastomer having residual --SH groups is air-curable. The elastomer is useful as a hot melt sealant for insulated window units.

REFERENCES:
patent: 4689389 (1987-08-01), Lee et al.

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