C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/100, 403/14,
C08L 75/08 (2006.01) C08G 18/08 (2006.01) C08L 75/04 (2006.01)
Patent
CA 1310148
ABSTRACT In one aspect, this invention is a polyurethane polymer having dispersed therein elongate particles of a high-melting, rigid polymer in an amount sufficient to measurably increase the tensile strength and/or elongation of the polyurethane relative to a like polyurethane which is prepared in the absence of said elongated particles. The elongate particles have an average length of less than 10 micrometers and an aspect ratio of greater than 1. The rigid polymer is advantageously formed separately from the formation of the poly- urethane polymer. Preferably, the rigid polymer is dispersed in the active hydrogen-containing composition employed in making the polyurethane. A particularly useful rigid polymer is a polymer which is a reaction product of an aromatic diamine and an aromatic diisocyanate. 31,498-F
539047
Smart & Biggar
The Dow Chemical Company
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