Cover-gasket assembly for hard disk device

摘要

A cover-gasket assembly for a hard disk device which comprises a gasket applied to a predetermined position of a cover for the hard disk device, wherein the gasket is formed essentially of a cured product of a fluorosilicone rubber composition. The assembly is particularly excellent in sealing property against permeation of water vapor, and can be used extremely effectively for hard disk devices for handy office-automation apparatuses such as laptop or pocket-size personal computers, word processors and the like which are expected to be used under various temperature and humidity conditions. The fluorosilicone rubber composition comprises (a) a silicone containing an Si-R4-Rf group where R4 is alkylene or oxa-alkylene (preferably ethylene) and Rf is a pefluoroalkyl or perfluoroalkyl ether group (preferably C8F17 or C3F7-O-C3 F6-O-C2F4O-) (b) a filler; and (c) a catalyst. mp