Block copolymer, composition thereof, and film made thereof

Details Block copolymer, composition thereof, and film made thereof Block copolymer, composition thereof, and film made thereof

2005-01-11

2005-01-11

Tarazano, D. Lawrence (Department: 1773)

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

C428S517000, C428S910000, C525S071000, C525S088000, C525S089000, C525S098000, C525S180000, C526S348100, C526S347000

Reexamination Certificate

active

06841261

ABSTRACT:
It is to provide a block copolymer and its copolymer composition which provides a heat shrinkable (multilayer) film with less spontaneous shrinkage while maintaining favorable low temperature shrinkability, and a heat shrinkable (multilayer) film containing the block copolymer. By using a block copolymer comprising a vinyl aromatic hydrocarbon and a conjugated diene characterized in that the relation of the loss tangent value obtained by dynamic viscoelasticity measurement with the temperature satisfies specific conditions, or a composition containing the copolymer composition as an essential component, a heat shrinkable (multilayer) film with less spontaneous shrinkability and less odor while maintaining favorable low temperature shrinkability can be obtained.

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