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Title:
STAIN-PROOFING AGENT FOR IMPACT RESISTING COPOLYMER, AND METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2015091961
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a hetero-phase copolymer by which the stain of a reactor during polymerization is suppressed.SOLUTION: In the method for producing a hetero-phase copolymer such as a propylene-ethylene copolymer by two-step polymerization, a stain-proofing agent is introduced into a secondary polymerization reactor operated in series with a first polymerization reactor. The antifouling agent may be a multi-component stain-proofing agent and/or a coating agent. The multicomponent stain-proofing agent is made of an active limitation agent and a selectivity control agent made of alkoxysilane expressed by general formula SiRm(OR'). By the feed of the stain-proofing agent, the stain of the reactor during polymerization is suppressed, and the production of a hetero-phase copolymer having a rubber content of about 10 to 50% is made possible.

Inventors:
JAN W VAN EGMOND
PAINTER ROGER B
ZUZANNA KULIK
JOEL D WIELICZKO
Application Number:
JP2014224019A
Publication Date:
May 14, 2015
Filing Date:
November 04, 2014
Export Citation:
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Assignee:
WR GRACE & CO CONNECTICUT
International Classes:
C08F4/642; C08F2/00; C08F210/00; C08F297/08
Domestic Patent References:
JP2002060450A2002-02-26
Attorney, Agent or Firm:
特許業務法人小田島特許事務所