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:
Dec. 02, 2008
Filed:
Oct. 08, 2003
Isao Kubota, Tokyo, JP;
Kiyonori Umetsu, Tokyo, JP;
Yoshiaki Aimura, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
An acrylic rubber composition comprising (A) 100 weight parts of an acrylic rubber comprising 80-99.9 weight % of units of a monomer selected from acrylic acid ester monomers and methacrylic acid ester monomers, and 0.1-20 weight % of units of an α,β-ethylenically unsaturated carboxylic acid monomer, (B) 5-200 weight parts of synthetic silica, and (C) 0.05-20 weight parts of a crosslinking agent. The acrylic rubber composition preferably further comprises 5-200 weight parts of aluminum silicate containing at least 5 weight % of AlOwherein the total amount of AlOand SiOis at least 60 weight %. The rubber composition has good storage stability and gives a crosslinked object having good heat aging resistance, reduced compression set and good mechanical properties.