Method of reducing hot hydrocarbon oil swell of filled silicone sealant gaskets

摘要

A method of making a gasket from a room temperature vulcanizable silicone sealant composition containing a hydroxyl endblocked polydimethylsiloxane; calcium carbonate or a combination of calcium carbonate and reinforcing silica filler, a specifically selected ketoximosilane crosslinker combination such as vinyltriketoximosilane and methyltriketoximosilane and a catalyst. The gasket has a reduced swell in hot hydrocarbon oil and cures rapidly enough to be used on an automated production line for formed-in-place gaskets.