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:
May. 13, 2014
Filed:
Oct. 16, 2006
Hiroyuki Sano, Fujisawa, JP;
Hiroki Matsumoto, Fujisawa, JP;
Hiroyuki Sano, Fujisawa, JP;
Hiroki Matsumoto, Fujisawa, JP;
NOK Corporation, Tokyo, JP;
Abstract
[Problem]To provide a method for producing a polyol-crosslinking, crosslinked fluororubber product which exhibits low tack properties and significantly increased rubber hardness. [Means for Solving the problem] The method comprises pressurizing, heating, and vulcanizing a fluororubber composition to mold a vulcanized product; the fluororubber composition comprising a polyol-crosslinkable fluororubber, a crosslinking accelerator including a quarternary phosphonium salt or a quarternary ammonium salt, and a polyol crosslinking agent, the weight ratio X of the crosslinking accelerator to the polyol crosslinking agent (crosslinking accelerator/polyol crosslinking agent) being from 0.90 to 3.00 for a quarternary phosphonium salt, and being from 0.4 to 0.6 for a quarternary ammonium salt; applying a treatment solution containing the polyol crosslinking agent and the crosslinking accelerator dissohttp://reedman/Manuals/Text_Manual/Section_03.htm - 3.1lved in a solvent to a surface of the vulcanized product; and heat-treating the resulting vulcanized product at a temperature ranging from 200 to 300° C. for 1 to 20 hours.