Blend of styrene-maleic anhydride and high impact polystyrene
US4335037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1981 |
| Grant date | Jun 15, 1982 |
| Priority date | — |
| Expiry date | Mar 26, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A blend having advantageous toughness and impact resistance is prepared by hot working of a mixture of from about 5 to about 25% of a high impact polystyrene containing from about 4 to about 16% rubber, said high impact polystyrene having an average molecular weight which is significantly higher than the average molecular weight of the hereafter described styrene-maleic anhydride resin and about 95 to 75% of a styrene-maleic anhydride resin containing from about 80 to 94% styrene, from about 5 to 15% maleic anhydride, and from about 1 to about 5% rubber. The blend is especially useful in molding fiber-reinforced articles. The blend has outstanding toughness when green. That is, hot and freshly molded articles can be removed from the mold with minimized breakage, thus decreasing the amount of scrap arising from the breakage of a green molded item at the time of being ejected and/or removed from a mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.