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US 5,331,048 AGranted
Blends of vinylaromatic-conjugated diene block copolymers and polybutenes
AssigneePhillips Petroleum Company
InventorLori C. Hasselbring
Life of this patent
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Abstract
Blends of monovinyl aromatic-conjugated diene block copolymers with polybutene are provided. Methods of making these resins and articles made therefrom are provided.
Claims15
A composition comprising:
- (a) a resinous polymodal monovinyl aromatic-conjugated diene block copolymer;
- and (b) at least one liquid polybutene;
- wherein said polymodal monovinyl aromatic-conjugated diene block copolymer is present in an amount in the range of about 85 to about 97 weight percent, based on total weight of said monovinyl aromatic-conjugated diene block copolymer and said at least one polybutene;
- and
- wherein said at least one polybutene is present in an amount in the range of about 3 to about 20 weight percent, based on total weight of said monovinyl aromatic-conjugated diene block copolymer and said at least one polybutene.
2 more elements
A method for improving the impact strength of monovinyl aromatic-conjugated diene block copolymers, said method comprising admixing with a polymodal monovinyl aromatic-conjugated diene block copolymer an amount of low molecular weight polybutene in the range of about 3 to about 20 weight percent based on total weight of the composition.
Dependencies are inferred from the claim text.