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Title:
HYDROGENATED BLOCK COPOLYMER, HYDROGENATED BLOCK COPOLYMER COMPOSITION AND HEAT-SHRINKABLE FILM MADE THEREOF
Document Type and Number:
Japanese Patent JP2007016134
Kind Code:
A
Abstract:

To provide a hydrogenated block copolymer suitable for a heat-shrinkable film and having well-balanced properties such as transparency, solvent resistance, spontaneous shrinking property, low-temperature shrinking property, etc., and provide a composition of the copolymer.

The hydrogenated block copolymer is composed of a vinyl aromatic hydrocarbon and a conjugated diene at a weight ratio of 60/40 to 95/5, the number-average molecular weight of the copolymer is 30,000-500,000 determined by gel permeation chromatography (GPC), the relationship of the loss tangent determined by dynamic viscoelasticity measurement to temperature satisfies a specific condition and the hydrogenation ratio of the copolymer is ≥60%.


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Inventors:
HOSHI SUSUMU
YAMAURA YUKIO
Application Number:
JP2005199267A
Publication Date:
January 25, 2007
Filing Date:
July 07, 2005
Export Citation:
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Assignee:
ASAHI KASEI CHEMICALS CORP
International Classes:
C08F8/04; C08J5/18; C08L51/04; C08L53/02
Domestic Patent References:
JP2006117879A2006-05-11
JP2005126546A2005-05-19
Foreign References:
WO2002038642A12002-05-16
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki



 
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