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. 31, 1992
Filed:
May. 29, 1990
John W Reisch, Guilford, CT (US);
Maurice C Raes, Branford, CT (US);
Olin Corporation, Cheshire, CT (US);
Abstract
The present invention relates to a process for preparing polyurethane/polyurea or polyurea elastomers by spray processing or reaction injection molding a reaction mixture comprising an A-side and a B-side, wherein said A-side comprises a polyisocyanate or an isocyanato-terminated polyurethane prepolymer and wherein said B-side comprises a polyol or polyamine plus a chain extender, in order to form a polyurethane/polyurea or polyurea elastomer, said polyol having an equivalent of between about 1,000 and about 20,000, a preferred molecular weight of between about 5,000 and about 30,000 and an end group unsaturation level of no greater than 0.06 milliequivalents per gram of polyol, said polyol being prepared using a double metal cyanide complex catalyst, said polyamine being fabricated by amine-capping said polyol with an amine-containing compound, said chain extender being selected from the group consisting of diol and aromatic diamine chain extenders with the proviso that said B-side contain at least some amount of said polyamine or of said aromatic diamine chain extender.