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:
Apr. 02, 1985
Filed:
Feb. 18, 1983
Takao Miyoshi, Ube, JP;
Akira Sakanoue, Ube, JP;
Central Glass Company Limited, Ube, JP;
Abstract
A polymer-coated particulate inorganic material, e.g. graphite, graphite fluoride or molybdenum disulfide, is obtained by preparing a reaction system containing a liquid medium, fine particles of the inorganic material, at least one vinylic monomer which undergoes radical polymerization or copolymerization and a polymerization initiator and allowing the vinylic monomer(s) in the reaction system to undergo polymerization and to bond to the surfaces of the inorganic material particles by graft polymerization. To enhance the efficiency of graft polymerization to thereby realize uniform coating even when the inorganic material is very low in surface energy as typified by graphite fluoride, the pH of the reaction system is adjusted to a value ranging from 5 to 9 by adding alkali to the reaction system soon after the addition of the polymerization initiator or alternatively by treating the inorganic material with alkali in advance of preparation of the reaction system. The polymer-coated inorganic material can easily be shaped into a solid body by compacting, optionally with addition of a synthetic resin.