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:
Sep. 26, 2000
Filed:
Mar. 31, 1998
Kazutoshi Haraguchi, Chiba, JP;
Yusho Usami, Chiba, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A composite of a thermosetting resin with a metallic oxide, prepared by a process which comprises subjecting a metal alkoxide containing a silicon alkoxide and/or a low condensate thereof to hydrolysis and polycondensation in a solution of a phenolic resin and/or thermosetting resin containing a phenolic resin while effecting the removal of the solvents and/or curling reaction of the resins to incorporate a particulate metallic oxide having an average particle diameter of from 0.01 to 5 .mu.m homogeneously in the thermosetting resin with a good interfacial wettability without causing macroscopic phase separation, as well as a process for the preparation of such a composite of a thermosetting resin with a metallic oxide and a process for the preparation of a crack-free molded composite product. A tribological material such as bearing, brake and clutch material includes such a composite as an essential constituent. The composite provides a thermosetting resin with an enhancement in surface properties such as hardness, sliding properties such as friction coefficient, critical PV value and wearability and mechanical properties such as impact resistance, particularly strength, elastic modulus and elongation. Thus, a cured or uncured composite of a thermosetting resin with a metallic oxide can be used as a molding material, sliding material, friction material, coating material, film-forming material, and the like.