Linear block copolymer composition

Details Linear block copolymer composition Linear block copolymer composition

2011-07-12

2011-07-12

Mullis, Jeffrey C (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S098000, C525S099000, C525S250000, C525S271000, C525S314000

Reexamination Certificate

active

07977428

ABSTRACT:
To provide a block copolymer composition excellent in balance of transparency, impact resistance, etc. in the form of not only an excluded product and a blow molded product but also an injection molded product.A linear block copolymer composition having at least three types of polymer blocks with different molecular weights each comprising a vinyl aromatic hydrocarbon as monomer units, wherein the molecular weight distribution of a mixture of the polymer blocks is within a specific range, and in GPC of the mixture, M1/M2is within a specific range, where M1is the peak top molecular weight corresponding to a peak at which the peak top molecular weight becomes maximum among peaks forming a proportion of the area of at least 30% to the whole peak area, and M2 is the peak top molecular weight corresponding to a peak at which the peak top molecular weight becomes minimum among peaks at which the peak top molecular weight is at most 50,000 and which form a proportion of the area of at least 20% to the whole peak area.

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Office Action issued Sep. 14, 2010, in Japanese Patent Application No. 2005-504019 (with English-language Translation).

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