Title:
ゲルを含まない透明フィルムの製造に使用するスチレンブロックコポリマー組成物
Document Type and Number:
Japanese Patent JP2006509089
Kind Code:
A
Abstract:
A composition to be used for the manufacture of transparent, gelfree films, comprising: a) at least 65 wt% of a styrenic block copolymer, having a molecular structure according to the formula S-(I/B)-S (1) or ÄS-(I/B)Ün X (2), wherein each S independently is a polymer block of predominantly styrene and (I/B) is a substantially random polymer block of predominantly isoprene and butadiene in a mutual weight ratio in the range of from 30/70 to 70/30, wherein said polymer block (I/B) has a glass transition temperature (Tg) of at most -60 DEG C (determined according to ASTM E-1356-98), wherein n is an integer equal to or greater than 2, and wherein X is the residue of a coupling agent, wherein said styrenic block copolymer having a poly(styrene) content in the range of from 28 to 31 % by weight, having poly(styrene) blocks S of an apparent molecular weight in the range of from 10,000 to 15,000, having an apparent molecular weight of the complete block copolymer in the range of from 110,000 to 160,000 and wherein the diblock S-(I/B) optionally occurs in a content of at most 20 mol%, b) from 5 to 25 wt% of a second thermoplastic resin, c) from 1 to 10 wt% of a plasticizing oil, the sum of the percentages of the components a, b and c being 100%, and all weight percentages being relative to the weight of the complete composition and extruded or cast or blown mono- or multi-layer films prepared from them.
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Inventors:
J. Jolie, Hert
Murren Hout, Yak Rodewake
Murren Hout, Yak Rodewake
Application Number:
JP2004558106A
Publication Date:
March 16, 2006
Filing Date:
December 03, 2003
Export Citation:
Assignee:
Clayton Polymers Research B.B.
International Classes:
C08L53/02; C08L23/02; C08L25/06
Attorney, Agent or Firm:
Yoshio Kawaguchi
Makoto Ono
Katsuma Osaki
Mitsuaki Tsubokura
Makoto Ono
Katsuma Osaki
Mitsuaki Tsubokura