Title:
GRAFT COPOLYMER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3389627
Kind Code:
B2
Abstract:
PURPOSE: To produce easily at good efficiency a graft copolymer comprising a thermoplastic elastomer segment and a vinyl polymer segment and improved in heat resistance, mechanical properties, moldability and molding appearance without detriment to the inherent flexibility of the thermoplastic elastomer.
CONSTITUTION: This graft copolymer is the one comprising a thermoplastic elastomer segments and vinyl polymer segments and having a multi-phase structure in which segments of one kind form a disperse phase of spherical particles as fine as 0.01-5μm in a continuous phase formed from segments of the other kind. This production process comprises producing a precursor of a graft polymer from a thermoplastic elastomer and a vinyl polymer which is a copolymer of a vinyl monomer with a radical-polymerizable organic peroxide and having an active oxygen content of 0.003-0.73wt.% and melt-kneading this precursor.
Inventors:
Motoyuki Sugiura
Tomiho Yamada
Tetsuya Ito
Tomiho Yamada
Tetsuya Ito
Application Number:
JP4689293A
Publication Date:
March 24, 2003
Filing Date:
March 08, 1993
Export Citation:
Assignee:
Nippon Oil & Fat Co., Ltd.
International Classes:
C08F255/06; C08F255/02; C08F255/04; C08F283/00; C08F285/00; C08F287/00; C08F291/00; C08F291/02; C08G81/02; (IPC1-7): C08G81/02; C08F255/02; C08F283/00; C08F291/02
Domestic Patent References:
| JP1138214A | ||||
| JP3237146A |
Attorney, Agent or Firm:
Hironobu Onda
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