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. 12, 1985
Filed:
Dec. 19, 1984
Louis M Alberino, Cheshire, CT (US);
Dale F Regelman, Wallingford, CT (US);
Nancy P Vespoli, Guilford, CT (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Polyamide-polyurea containing polymers are disclosed that are derived from the reaction of (A) an organic polyisocyanate; (B) an organic compound having at least two active hydrogen containing groups; and (C) about 15 to about 160 parts per 100 parts of said (B) of a chain extender combination comprising (i) a particular enamine and (ii) an aromatic diamine and optionally (iii) an extender diol wherein the ratio of equivalents of (A) to total equivalents of (B) and (C) is within the range of about 0.90:1 to 1.10:1. The polymers find particular utility in the preparation of RIM parts having excellent physical properties. At the same time, the polymers are characterized by slower gel times than prior art aromatic diamine extended polymers thereby allowing the filling of larger molded parts.