Back to results
US 4,308,358 AGranted
High impact polystyrene blend compositions
AssigneeShell Oil Company
InventorCharles R. Miller
Life of this patent
Estimating the term…
Abstract
High impact polystyrene compositions are prepared by the intimate melt mixing of a styrene polymer and a particular AB two-block copolymer. The A block is a polymer of a monoalkenyl arene having a specified molecular weight range and the B block is a butadiene polymer block having a 1,2 vinyl content of greater than about 20 percent.
Claims6
An AB block copolymer wherein
- (a) said A block is a polymer block of a monoalkenyl arene having a weight average molecular weight between about 20,000 and about 150,000,
- (b) the weight percent of said A block in said block copolymer is between about 15 percent by weight and about 35 percent by weight;
- and
- (c) said B block is a polymer block of butadiene having a vinyl 1,2 configuration of 20 percent or greater.
1 more element
Dependencies are inferred from the claim text.