Blend of resinous radial copolymers of a monovinyl-...

Details Blend of resinous radial copolymers of a monovinyl-... Blend of resinous radial copolymers of a monovinyl-...

C - Chemistry, Metallurgy

08

L

400/3036

C08L 25/10 (2006.01) C08J 3/24 (2006.01) C08L 55/00 (2006.01) C08L 87/00 (2006.01)

Patent

CA 1090034

BLEND OF RESINOUS RADIAL COPOLYMERS OF A MONOVINYL- SUBSTITUTED AROMATIC COMPOUND AND A CONJUGATED DIENE Abstract of the Disclosure A composition comprising a blend of at least two resinous radial copolymers of a monovinyl-substituted aromatic compound and a conjugated diene, said blend having a heterogeneity index of polymerized monovinyl-substituted aromatic compound blocks within the range of about 2.8 to 3.5. The heterogeneity index is the ratio of weight average to number average molecular weight. Such compositions exhibit high strength and are made by blending at least two resinous radial block copolymers made under different conditions so as to give different lengths of the polymerized monovinyl-substituted aromatic compound blocks. These compositions are particularly useful in applications such as injection molded articles where high impact strength is desirable.

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