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Title:
BLOCK COPOLYMER COMPOSITION, MOLDED ARTICLE, METHOD FOR PRODUCING MOLDED ARTICLE, AND METHOD FOR ADJUSTING HAZE VALUE OF MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2020/153169
Kind Code:
A1
Abstract:
Provided is a block copolymer composition containing a block copolymer a and a copolymer b, the mass ratio of the block copolymer a to the copolymer b being 20/80 to 75/25, wherein: the block copolymer a includes a polymer block mainly composed of a vinyl aromatic hydrocarbon monomer unit and a polymer block mainly composed of a conjugated diene monomer unit, and the vinyl aromatic hydrocarbon monomer unit/the conjugated diene monomer unit is 50/50 to 95/5; the copolymer b is a random copolymer of a vinyl aromatic hydrocarbon monomer unit and a (meth)acrylic acid and/or (meth)acrylic acid alkyl ester monomer unit, and the vinyl aromatic hydrocarbon monomer unit/(the (meth)acrylic acid and/or (meth)acrylic acid alkyl ester monomer unit) is 50/50 to 90/10; the copolymer b has a Mw of 150,000-250,000; the half-value width in a molecular weight distribution curve is 30% or more; and an external haze value is 4.0% or less as measured according to the ISO14782.

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Inventors:
SATO NAOHIKO (JP)
Application Number:
PCT/JP2020/000856
Publication Date:
July 30, 2020
Filing Date:
January 14, 2020
Export Citation:
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Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C08L25/14; C08L53/02
Foreign References:
JP2019094387A2019-06-20
JP2005298775A2005-10-27
JP2007177119A2007-07-12
JP2008248056A2008-10-16
JP2003128861A2003-05-08
JP2006249446A2006-09-21
JPH06240098A1994-08-30
JPS3619286B11961-10-13
JPS4317979B1
JPS482423B1
JPS4936957A1974-04-05
JPS5749567A1982-03-23
JPS5811446A1983-01-22
US5708092A1998-01-13
GB2241239A1991-08-28
US5527753A1996-06-18
JP2019009876A2019-01-17
Other References:
I.M. KOLTHOFF ET AL., J. POLYM. SCI., vol. 1, 1946, pages 429
See also references of EP 3916050A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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