Transparent heat-resistant styrene-base copolymer
US5191046A · kind A · utility
3Cited by
28References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Mar 1, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F212/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A transparent heat-resistant styrene-base copolymer comprising specific amounts of units derived respectively from (a) a styrene-type monomer, (b) a (meth)acrylonitrile monomer and/or (meth)acrylic ester type monomer and (c) a phenylmaleimide monomer, in which the weight ratio (b)/(c) and the ratio of the weight average molecular weight to the number average molecular weight fall within their respective specific ranges and the amount of the phenylmaleimide-type monomer still remaining in the copolymer is below a certain specific concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.