Processes for the preparation of crosslinked copolymers
US4894309A · kind A · utility
4Cited by
10References
11Claims
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Key dates
| Filing date | Sep 19, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Sep 19, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08737
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A free radical suspension polymerization process for obtaining crosslinked styrene butadiene ternary copolymers which comprises the polymerization of styrene monomers, butadiene monomers, and crosslinking components in the presence of a surfactant, a stabilizer, and a first and second initiator; and wherein the aforementioned components are present in an aqueous phase; heating the resulting aqueous mixture at a temperature of from about 50.degree. C. to about 110.degree. C.; thereafter heating the mixture at a temperature of from about 110.degree. C. to about 150.degree. C.; followed by cooling and isolating the desired product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.