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US 4,520,138 AGranted
Dull, smooth unit soles
AssigneeShell Oil Company
InventorGlenn R. Himes
Life of this patent
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Abstract
Unit soles having a smooth, dull appearance are molded from a polymeric composition comprising a radial (AB)--.sub.x BA monoalkenyl arene/conjugated diene block copolymers, syndiotactic-1,2-polybutadiene a polystyrene resin, a hydrocarbon extending oil, a blowing agent and a filler.
Claims14
A non-delaminating polymeric composition having a smooth, dull appearance in molded unit soles, said composition comprising:
- (a) 100 parts by weight of one or more radial (AB-).sub.x BA block copolymers where x is greater than 1, each block A being a monoalkenyl arene polymer having an average molecular weight between about 5,000 and 75,000, each block B being an elastomeric conjugated diene polymer having an average molecular weight between about 15,000 and about 300,000, and said blocks A comprise 8-90% by weight of each copolymer;
- (b) about 5 to about 100 parts by weight of a syndiotactic 1,2-polybutadiene;
- (c) about 5 to 100 parts by weight of polystyrene;
- (d) about 0 to about 200 parts by weight of a hydrocarbon rubber extending oil;
- (e) about 0 to about 250 parts by weight of a large particle porous filler;
- and
- (f) about 0.01 to about 10 parts by weight of a blowing agent.
4 more elements
Dependencies are inferred from the claim text.