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. 06, 1982
Filed:
Dec. 28, 1979
Yoshiyuki Mukoyama, Hitachi, JP;
Nobutoshi Chikazumi, Hitachi, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
Granular polymers having a relatively uniform fine particle size as small as about 10 .mu.m can be produced in high yield by suspension polymerization by conducting the polymerization of one or more crosslinkable polymerizable monomers, non-crosslinkable polymerizable monomers or a mixture thereof in the presence of a suspension agent, and if necessary, together with a suspension assistant and/or a non-reactive organic solvent, under stirring accompanying high speed shearing until the percentage conversion becomes 1 to 50% and continuing the polymerization under stirring without the accompanying high speed shearing and mechanical cutting.