Gasket for internal combustion engine

Abstract

Abstract PURPOSE:To obtain the title gasket excellent in a restoring force after compres sion, gasket properties and sealing property, by forming a specified coating layer on at least either surface of a (non)metallic sheet. CONSTITUTION:An interlaminar expanded graphite (a) of a specific volume of 10-300cc/g is obtained by treating graphite with a strong oxidizing agent and a halogen compound to form an intercalating compound, quickly heating this compound to produce a decomposition gas, and expanding the gaps between the graphite layers by this gas pressure. A coating material (B) is obtained by mixing 20-60wt.% component (a) with 40-80wt.% binder (b) comprising a synthetic resin such as a phenolic resin, an epoxy resin, an acrylic resin, a silicone resin or a fluorocarbon resin or a fluororubber. At least either surface of a metallic sheet comprising iron, copper (alloy), Al(alloy) or stainless steel or a nonmetallic sheet (A) comprising asbestos, ceramics, paper, aramid fiber, a synthetic fiber, a synthetic resin, graphite or rubber is coated with component B by coating, printing, soaking, spraying or the like to form a coating layer on the sheet.

Inventors

• 👤 Shusuke Yamaoka
• 👤 Yoshinao Kobayashi
• 👤 Yukisato Suga

Bibliographic Details