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. 30, 1996
Filed:
Jul. 21, 1993
Charles M Leir, Falcon Heights, MN (US);
Jerome J Hoffman, Hastings, MN (US);
Leonard A Tushaus, White Bear Lake, MN (US);
Gary T Wiederholt, West St. Paul, MN (US);
Mjeczyslaw H Mazurek, Roseville, MN (US);
Audrey A Sherman, St. Paul, MN (US);
William R Bronn, Maplewood, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
Block copolymers having a repeating unit comprised of polysiloxane and urea segments are prepared by copolymerizing certain diaminopolysiloxanes with diisocyanates. The invention also provides novel diaminopolysiloxanes useful as precursors in the preparation of the block copolymers and methods of making such diaminopolysiloxanes. Pressure sensitive adhesive compositions comprising the block copolymer are also provided as are sheet materials coated with the same.