Transparent polyblends
US5053456A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a polyblend comprising from 20 to 80% of a polymer A and from 80 to 20% of a polymer B, based on the total weight of polymers A and B in the polyblend, and wherein: PA0 Polymer A is a copolymer of 35 to 65% of methyl methacrylate and 35 to 65% of styrene grafted on butadienestyrene rubber, methyl methacrylate being partially replaceable by an acrylic ester, and either methyl methacrylate or grafting styrene being partially replaceable by acrylonitrile; and PA0 Polymer B is a copolymer of from 20 to 60% of a vinylaromatic hydrocarbon monomer, from 20 to 60% of a C.sub.1 -C.sub.4 -alkyl acrylate or a C.sub.1 -C.sub.4 -alkyl methacrylate ester, and from 12 to 30% of maleic anhydride or maleimide or a N-substituted maleimide or a mixture of such maleic acid derivatives. The polyblends have heat resistance, transparency and impact strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.