Claims
- 1. A thermoplastic molding composition which comprises:
- (a) from 40-95 parts by weight of a copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride; and
- (b) from 10-50 parts by weight of an emulsion graft copolymer comprising (1) from 20-80% by weight of a backbone polymer of the units of butadiene or butadiene and styrene, wherein the butadiene units are present in quantities of at least 40% by weight of the backbone polymer, (2) 80-20% by weight of an acrylic monomer chosen from the group consisting of lower alkyl methacrylates, alicyclic methacrylates and alkyl acrylates, graft polymerized to (1) and (3) 0 to 60% by weight of a styrene monomer graft polymerized to (1) sequentially before the polymerization of (2).
- 2. A thermoplastic molding composition which comprises from 60-75 parts by weight of a copolymer of styrene-maleic anhydride, from 10-40 parts by weight of an emulsion graft copolymer comprising (1) from 20-80% by weight of a backbone polymer of the units of butadiene or butadiene and styrene, wherein the butadiene units are present in quantities of at least 40% by weight of the backbone polymer, (2) 80-20% by weight of an acrylic monomer chosen from the group consisting of lower alkyl methacrylates, alicyclic methacrylates and alkyl acrylates, graft polymerized to (1) and (3) 0 to 60% by weight of a styrene monomer graft polymerized to (1) sequentially before the polymerization of (2) and
- from 5-30 parts by weight of a polyphenylene ether resin.
Parent Case Info
This is a division of application Ser. No. 935,919 filed Aug. 23, 1978, which in turn is a division of application Ser. No. 477,435 filed June 7, 1974, now U.S. Pat. No. 4,124,654.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3792123 |
Abolins et al. |
Feb 1974 |
|
4113797 |
Lee |
Sep 1978 |
|
4131598 |
Abolins et al. |
Dec 1978 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
935919 |
Aug 1978 |
|
Parent |
477435 |
Jun 1974 |
|