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. 21, 1998
Filed:
Dec. 30, 1988
Applicant:
Inventor:
Birger Johannessen, Maplewood, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
C06B / ;
U.S. Cl.
CPC ...
149 196 ; 149 191 ; 149 194 ; 528 65 ; 555 12 ;
Abstract
Epichlorohydrin is polymerized in the presence of anhydrous stannic chloride catalyst and an alcohol initiator to produce a polyepichlorohydrin product comprising predominantly secondary hydroxyl-terminated polyepichlorohydrin polymer having low polydispersity, from which polyurethanes and azide derivatives can be made, polyurethanes prepared from such azide derivatives being useful as a binder for solid rocket propellants.