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Title:
BLOCK COPOLYMER COMPOSITION FOR HOT MELT ADHESIVE AGENT
Document Type and Number:
WIPO Patent Application WO/2013/099973
Kind Code:
A1
Abstract:
Provided is a block copolymer composition for a hot melt adhesive agent, and the composition is capable of providing a hot melt adhesive agent composition having excellent softening agent retention, heat resistance, and transparency. The block copolymer composition for a hot melt adhesive comprises a block copolymer A and a block copolymer B, each of which has a predetermined structure. The aromatic vinyl monomer unit content of the block copolymer A is between 30 and 50 wt%. The aromatic vinyl monomer unit content of the block copolymer B is between 15 and 25 wt%. The ratio of aromatic vinyl monomer units per the entire polymer content of the block copolymer composition is between 18 and 45 wt%. The weight ratio (A/B) of the block copolymer A to the block copolymer B is between 20/80 and 80/20. The ratio (MwA/MwB) of the weight-average molecular weight (MwA) of the block copolymer A to the weight-average molecular weight (MwB) of the block copolymer B is between 0.65 and 1.5.

Inventors:
ODA RYOUJI (JP)
FURUKO AYAKO (JP)
Application Number:
PCT/JP2012/083705
Publication Date:
July 04, 2013
Filing Date:
December 26, 2012
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
C09J153/02; C09J11/06; C09J191/00
Domestic Patent References:
WO1995011130A11995-04-27
WO2010113883A12010-10-07
Foreign References:
JPH11512468A1999-10-26
JP2011127089A2011-06-30
JP2008239931A2008-10-09
JPH0860120A1996-03-05
JPS52140545A1977-11-24
JPH04501285A1992-03-05
JPH04351689A1992-12-07
JP2012207127A2012-10-25
JPH08283685A1996-10-29
JPH1030079A1998-02-03
JP2001504519A2001-04-03
Other References:
RUBBER CHEM. TECHNOL., vol. 45, 1972, pages 1295
Attorney, Agent or Firm:
YAMASHITA, Akihiko et al. (JP)
Akihiko Yamashita (JP)
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Claims:



 
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