C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/167
C08G 18/10 (2006.01) C08G 18/32 (2006.01) C08G 18/65 (2006.01) C08G 18/66 (2006.01) C08G 18/67 (2006.01)
Patent
CA 1235844
ABSTRACT OF THE DISCLOSURE 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) from 15 to 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 from 0.90:1 to 1.10:1. The polymers find particular utility in the prepara- tion 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 poly- mers thereby allowing the filling of larger molded parts.
495406
Alberino Louis M.
Regelman Dale F.
Vespoli Nancy P.
Gowling Lafleur Henderson Llp
The Dow Chemical Company
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