Title:
ブロック共重合体及びその組成物
Document Type and Number:
Japanese Patent JP4530669
Kind Code:
B2
Abstract:
The present invention provides a block copolymer or a hydrogenated product thereof excellent in low-temperature shrinkability, natural shrinkability, rigidity and the like, excellent in a balance of physical properties such as blocking resistance, resistance to fusion bonding in hot water, impact resistance and the like, and having a few fish eyes (FE's) caused by gels. Further, the invention provides a heat shrinkable film and a heat shrinkable multilayer film suitable for drink container packaging, cap seals and the like, using such a block copolymer or the hydrogenated product thereof. The invention provides a block copolymer having a weight ratio of a vinyl aromatic hydrocarbon and a conjugated diene of 60/40 to 90/10 and a number average molecular weight measured by gel permeation chromatography (GPC) of 30,000 to 500,000, wherein the vinyl aromatic hydrocarbon constituting the block copolymer has a block rate of from 10 to 90% by weight, the vinyl aromatic hydrocarbon polymer blocks constituting the block copolymer have a peak molecular weight within the molecular weight range of 5,000 to 30,000, and 40 to 80% by weight of the vinyl aromatic hydrocarbon polymer blocks have a molecular weight of 35,000 or less.
More Like This:
| WO/2007/014998 | RUBBER COMPOSITION CONTAINING BRANCHED BLOCK POLYMERS |
| WO/2003/066696 | NOVEL BLOCK COPOLYMERS AND METHOD FOR MAKING SAME |
| WO/2004/065442 | POLYMER NANO-STRINGS |
Inventors:
Star advance
Mori Masahiro
Yukio Yamaura
Toshinori Shiraki
Mori Masahiro
Yukio Yamaura
Toshinori Shiraki
Application Number:
JP2003587858A
Publication Date:
August 25, 2010
Filing Date:
April 23, 2003
Export Citation:
Assignee:
Asahi Kasei Chemicals Corporation
International Classes:
C08F297/04; B29C61/06; B32B27/08; C08F8/04; C08G81/02; C08J5/18; C08K5/07; C08K5/09; C08K5/105; C08K5/20; C08K5/3435; C08K5/3475; C08K5/372; C08L25/02; C08L53/02; C08L91/00; C08K5/134
Domestic Patent References:
| JP2001002871A | 2001-01-09 | |||
| JP2000026698A | 2000-01-25 | |||
| JPH09324084A | 1997-12-16 | |||
| JP2001354827A | 2001-12-25 | |||
| JPH11158241A | 1999-06-15 | |||
| JP2002030126A | 2002-01-31 |
Foreign References:
| WO2002002692A1 | 2002-01-10 | |||
| WO2002002693A1 | 2002-01-10 | |||
| WO2003060009A1 | 2003-07-24 |
Attorney, Agent or Firm:
Masami Sakai
Norio Kagami
Norio Kagami