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:
Nov. 22, 1988
Filed:
Jun. 16, 1987
Applicant:
Inventor:
Douglas C Edwards, Sarnia, CA;
Assignee:
Polysar Limited, Sarnia, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
5253307 ; 5253308 ; 5253011 ; 5253331 ; 5253332 ; 5253291 ; 5253293 ; 525345 ; 525388 ; 5253279 ; 526290 ; 526291 ; 526295 ; 5263314 ;
Abstract
A process is provided for the production of a polymer of reduced molecular weight by subjecting, in bulk form, a halogenated butyl polymer having at least 75 percent of the unsaturation in the EXO methylene configuration to mastication in an extruder while exposing the masticated polymer to an atmosphere containing ozone. Such reduced molecular weight polymers have an M.sub.n of from about 10,000 to about 40,000 and may be used in caulks and sealants.