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:
Aug. 03, 1982
Filed:
Aug. 14, 1981
Louis M Alberino, Cheshire, CT (US);
Dale F Regelman, Wallingford, CT (US);
The Upjohn Company, Kalamazoo, MI (US);
Abstract
Polyamide polyurethane polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate; (B) at least one organic polyol; and (C) a ketene-aminal having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4, when taken separately, are independently selected from the group consisting of lower alkyl, aralkyl, and cycloalkyl and, when taken together as R.sub.1 with R.sub.2 and R.sub.3 with R.sub.4 with the respective nitrogen atoms to which they are attached, represent independently heterocyclic groups having from 5 to 7 ring atoms, wherein the equivalent proportions of said polyol component (B) to said ketene-aminal component (C) fall within the range of about 1:4 to about 1:80 and the ratio of equivalents of said isocyanate to total equivalents of isocyanate reactive ingredients (B) plus (C) is within the range of about 0.95:1 to 6:1. The polymers find particular utility in the preparation of RIM parts which parts have essentially attained their optimum physical properties without the need of a thermal curing step.