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. 22, 1986
Filed:
Oct. 09, 1984
Robert R Blanchard, Brusly, LA (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Chlorosulfonated polyethylene materials having (a) weight average molecular weight of from about 40,000 to about 300,000, (b) a chemically combined chlorine content of from about 20 to about 50 percent by weight of polymer, (c) a chemically combined sulfur content of from about 0.8 to about 2.5 percent by weight of polymer and (d) a 100 percent modulus of from about 0.6 to about 4.8 megapascals are prepared in an anhydrous process wherein an amorphous chlorinated polyethylene starting material is first fluidized and then exposed to a gaseous mixture of sulfur dioxide and chlorine having a ratio of sulfur dioxide to chlorine of from about 1:1 to about 16:1 in the presence of a chlorine free radical generator such as ultraviolet light, at a temperature of from about 25.degree. to about 100.degree. Centigrade, for a period of two hours or less.