[12] Patent
[11] Patent No.:GC0010758  
[45] Date of Publishing the Grant of the Patent: 30/Sep /2019                62/2019  
Number of the Decision to Grant the Patent:2019/157098
Date of the Decision to Grant the Patent:17/Sep/2019

[21] Application No.:GC 2013-24307

[22] Filing Date:4/5/2013

[30] Priority:

[33] State [32] Priority date [31] Priority No.
JP
8/5/2012
2012-106530

[72] Inventors:1- SAWASATO Tadashi،2- SATO Eiji،3- NAKAZAWA Hitoshi،4- UEKUSA Shinya

[73] Owner: Denka Company Limited, 1-1, Nihonbashi-Muromachi 2-chome, Chuo-ku, Tokyo 103-8338, Japan, Tokyo, Japan

[74] Agent: Kadasa Law Firm

  

 

  

[51]IPC:
Int. Cl.: C08K 5/01, 5/101, 5/20; C08L 25/04, 53/02 (2006.01)

[56] Cited Documents:

-JP 59-184620 A (ASAHI CHEMICAL INDUSTRY Co., LTD) 20 OCTOBER 1984  
Examiner: Saja Mohammed AlHassan

[54] BLOCK COPOLYMER COMPOSITION AND SHEET
[57] Abstract: A block copolymer composition with a good balance of physical properties suitable for various types of packaging such as food product containers, beverage containers, industrial containers and blister packs, having excellent transparency, gloss, strength, rigidity and formability, having excellent anti-blocking properties and anti-sticking properties, and excelling in the aforementioned properties even when used in mixture with vinyl aromatic hydrocarbon-type polymers is offered. A block copolymer composition of a vinyl aromatic hydrocarbon and a conjugated diene, wherein a block copolymer component (I) having a molecular weight peak in the range of molecular weight 150,000 to 300,000 and comprising tapered blocks has a conjugated diene content of 10 to 20 mass%; a block copolymer component (II) having a molecular weight peak in the range of molecular weight 50,000 to 140,000 and comprising tapered blocks has a conjugated diene content of 30 to 50 mass%; and a ratio (I)/(II) between molecular weight peak areas occupied by block copolymer component (I) and block copolymer component (II) in the block copolymer composition is 20/80 to 80/20.
No. of claims: 13


 

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