Process for preparing .alpha.-methylstyrene-acrylonitrile copolymers
US4618663A · kind A · utility
7Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1983 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Sep 23, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing .alpha.-methylstyrene/acrylonitrile copolymers by suspension or bulk polymerization of .alpha.-methylstyrene and acrylonitrile with or without other vinyl compounds such as styrene, methyl methacrylate, vinyl toluene and t-butylstyrene in the presence of a difunctional organic peroxide, preferably a difunctional organic peroxide having a 10 hour half-life temperature of 60.degree. to 110.degree. C., at a polymerization temperature of 80.degree. to 120.degree. C. The process produces the copolymers having excellent transparency, heat resistance and strength in high conversions in a short time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.