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US 3,939,112 AGranted
Thermoplastic resin composition having high impact strength
AssigneePhillips Petroleum Company
InventorDonald G. Needham
Life of this patent
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Abstract
A thermoplastic resin composition is disclosed which contains a polymodal, resinous, branched block butadiene/styrene copolymer and a naphthenic extender oil. The resin has very high impact strength.
Claims9
A composition consisting essentially of
- a. a polymodal radial brached block copolymer of the general formula
- (A- B).sub.x Y
- wherein A is essentially a block of polymerized monovinyl-substituted aromatic monomers of 8 to about 16 carbon atoms;
- B is essentially a polymerized conjugated alkadiene block, the alkadiene having 4 to about 12 carbon atoms;
- Y is an atom or group of atoms derived from a polyfunctional coupling agent;
- and x represents the number of functional groups of said polyfunctional coupling agent, and
- b. an amount of a naphthenic extender oil which increases the impact strength.
4 more elements
Dependencies are inferred from the claim text.