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:
Mar. 20, 1984
Filed:
Apr. 07, 1982
Applicant:
Inventors:
William J Settineri, Midland, MI (US);
John M Hensler, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ;
U.S. Cl.
CPC ...
526 62 ;
Abstract
In the suspension polymerization of monovinyl aromatic polymers, detrimental polymer buildup on the internal surfaces of the reactor is reduced by contacting the internal surfaces of the reactor with sulfur trioxide. This means of retarding polymer buildup is particularly adaptable to suspension polymerization of lightly crosslinked styrene-divinyl benzene copolymer beads which may also contain acrylonitrile.