Claims
- 1. A rubber modified polystyrene resin, said rubber modified polystyrene comprising a polystyrene matrix in which there is uniformly dispersed a discontinuous phase comprising particles of a styrene homopolymer englobulated in a diene rubber membrane, said particles having an average size ranging from about 0.1 to about 0.7 microns, the membrane thickness being not in excess of about 1/4th the average particle diameter, and the diene rubber content being from about 1 to about 10% by weight of the rubber modified polystyrene.
- 2. A resin as defined in claim 1 wherein said rubber modified polystyrene resin contains from about 3 to about 8% by weight of said diene rubber.
- 3. A resin as defined in claim 1 wherein said diene rubber is a polybutadiene or a rubbery copolymer of styrene and butadiene.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 246,383, filed Mar. 23, 1981, now U.S. Pat. No. 4,373,064, issued Feb. 8, 1983 which is a continuation of application Ser. No. 846,544, filed Oct. 28, 1977, abandoned, which is a continuation of application Ser. No. 725,740, filed Sept. 23, 1976, abandoned, which is a continuation of application Ser. No. 283,093, filed Aug. 23, 1972, abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1180085 |
Feb 1970 |
GBX |
Continuations (4)
|
Number |
Date |
Country |
Parent |
246383 |
Mar 1981 |
|
Parent |
846544 |
Oct 1977 |
|
Parent |
725740 |
Sep 1976 |
|
Parent |
283093 |
Aug 1972 |
|