Method of making broader molecular weight distribution polystyrene
US4029869A · kind A · utility
17Cited by
2References
1Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 30, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Dec 30, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F212/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Attempts to prepare polystyrene by peroxide-initiated suspension polymerization at 125.degree. C resulted in polymer having narrower molecular weight distribution than desired. The problem has been solved by copolymerizing the styrene with from 0.05 to 0.35 weight per cent, based on styrene, of a modifying comonomer consisting of a non-conjugated diolefinic compound having one very reactive olefinic group and one less reactive olefinic group such as, for example, allyl methacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.