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Title:
STABILIZER FOR POLYOLEFIN RESIN AND STABILIZED POLYOLEFIN RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2008/062860
Kind Code:
A1
Abstract:
Disclosed is a stabilizer capable of providing a polypropylene resin (PP resin) with high thermal stability. Also disclosed is a PP resin composition having high stability into which the stabilizer is added. Specifically disclosed is a stabilizer containing a copolymer (A) which is obtained by polymerizing an unsaturated monomer mixture composed of 1-50 parts by mass of an ethylenically unsaturated monomer (a) represented by the general formula (I) below and having a piperidyl group in a molecule, 50-99 parts by mass of at least one monomer (b) selected from isobutyl methacrylates, alkyl (meth)acrylates having an alkyl group with 6-13 carbon atoms and aromatic vinyl monomers, and 0-20 parts by mass of an ethylenically unsaturated monomer (c) other than the components (a) and (b) (with the total of the components (a), (b) and (c) being 100 parts by mass). (I) (In the formula, R1 represents a hydrogen atom or an alkyl group having 1-2 carbon atoms; X represents an oxygen atom or an imino group; Y represents a hydrogen atom or an alkyl group or alkoxyl group having 1-20 carbon atoms; and Z represents a hydrogen atom or a cyano group.)

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Inventors:
KIURA MASAAKI (JP)
MUKUDA TAKAHIRO (JP)
Application Number:
PCT/JP2007/072618
Publication Date:
May 29, 2008
Filing Date:
November 22, 2007
Export Citation:
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Assignee:
MITSUBISHI RAYON CO (JP)
KIURA MASAAKI (JP)
MUKUDA TAKAHIRO (JP)
International Classes:
C08L101/00; C08F220/10
Foreign References:
JP2002533548A2002-10-08
JPS5421489A1979-02-17
JP2001106864A2001-04-17
JP2003040937A2003-02-13
JPH10338777A1998-12-22
JP2003040937A2003-02-13
Other References:
"Polymer Handbook", 1989, A WILEY-INTERSCIENCE PUBLICATION
See also references of EP 2088172A4
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (16th Kowa Bldg.9-20, Akasaka 1-chom, Minato-ku Tokyo 52, JP)
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