Claims
- 1. A polymeric composition produced by polymerizing, in the presence of a rubber having a glass transition temperature below 0.degree. C., a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride and a C.sub.1 to C.sub.3 alkyl methacrylate to produce a composition comprising from 2 to 30% of the rubber, (ungrafted basis), grafted with a superstrate polymer and dispersed in a matrix polymer, the superstrate and matrix polymers each comprising from 45 to 83% of the monoalkenyl aromatic monomer, from 15 to 35% of the unsaturated dicarboxylic acid anhydride and from 2 to 20% of the C.sub.1 to C.sub.3 alkyl methacrylate, all percentages being by weight.
- 2. The composition according to claim 1 in which the amount of C.sub.1 to C.sub.3 alkyl methacrylate is from 4 to 10% by weight in both the superstrate and matrix polymers.
- 3. The composition according to claim 1 in which the C.sub.1 to C.sub.3 alkyl methacrylate is methyl methacrylate.
- 4. The composition according to claim 1 in which the rubber substrate is a polybutadiene comprising at least 90% of cis 1,4-polybutadiene units.
- 5. The composition according to claim 1 in which the rubber is polypentenamer.
- 6. A polymeric composition produced by polymerizing, in the presence of a rubber having a glass transition temperature below -30.degree. C., a monoalkenyl aromatic monomer, an unsaturated dicarboxylic acid anhydride and a C.sub.1 to C.sub.3 alkyl methacrylate to produce a composition comprising from 5 to 25% of the rubber (ungrafted basis), grafted with a superstrate polymer and dispersed in a matrix polymer, both superstrate and matrix polymers comprising from 50 to 75% of the monoalkenyl aromatic monomer, from 20 to 30% of the unsaturated dicarboxylic acid anhydride and from 2 to 20% of the C.sub.1 to C.sub.3 alkyl methacrylate, all percentages being by weight.
- 7. The composition of claim 6 that includes up to 5% by weight of an effective antioxidant stabilizer.
- 8. The composition of claim 7 in which the antioxidant stabilizer is a combination comprising a rubber stabilizer and 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.
- 9. A polymeric composition produced by polymerizing, in the presence of a polybutadiene rubber having at least 90% cis 1,4-butadiene units, a monomer composition consisting of styrene, maleic anhydride and methyl methacrylate to produce a composition comprising from 2 to 30% of the polybutadiene rubber, (ungrafted basis), grafted with a superstrate polymer and dispersed in a matrix polymer, said superstrate and matrix polymers each comprising from 60 to 75% of styrene, 20 to 30% of maleic anhydride and 4 to 10% of methyl methacrylate, and incorporating in said composition up to 2% of 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl) benzene; all percentages being by weight.
BACKGROUND OF THE INVENTION
This is a continuation-in-part of U.S. application Ser. No. 865,049, filed Dec. 27, 1977, U.S. Pat. No. 4,197,376.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3919354 |
Moore et al. |
Nov 1975 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
865049 |
Dec 1977 |
|