The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1998
Filed:
May. 06, 1997
Applicant:
Inventors:
Katsuhiko Kimura, Akashi, JP;
Taizo Aoyama, Takasago, JP;
Assignee:
Kaneka Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525319 ; 525191 ; 525227 ; 525241 ; 525310 ;
Abstract
The present invention provides the composite rubber particles and graft copolymer particles of composite rubber which can be used as the impact modifier being excellent in weather resistance, thermal stability, and particularly impact resistance without substantially lowering transparency of each resin. The composite rubber particles have intertwined molecular chains of the isobutylene polymer and the vinyl polymer so that the both polymers cannot be separated substantially from each other and the graft copolymer particles of composite rubber are prepared by graft-polymerizing at least one vinyl polymer to the above composite rubber particles.