Patent ID: 7977433
Filing Date: 2011-07-12
Classification: C08J,C08K

Abstract:
1. A production method of a cross-linked fluororubber product, comprising the steps of: previously polyol-crosslinking, as required: where R represents an alkyl group having a carbon number of 1 to 24 or an aralkyl group having a carbon number of 7 to 20, and X a polyol crosslinking agent; wherein the weight ratio of the cross-linking accelerator to the polyol crosslinking agent is in a range of 0.43 to 0.57; and subsequently heat treating the polyol-crosslinked composition, in a temperature range of 240 to ° C. to 260° C. for 0.1 to 48 hours; wherein the cross-linked fluororubber product produced according to the said production method has a dynamic friction coefficient of 0.1 to 0.4 in conformity to JIS K7125, P 8147, a surface roughness (Ra) of 1.5 to 4.0, and a surface roughness (Ry) of 10 to 25 both in conformity to JIS B-0601, and is formed into a HDD device stopper.