Polysulfide-epoxy thermoplastic elastomers
US5610243A · kind A · utility
19Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Oct 13, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.