C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/04 (2006.01) B29C 33/60 (2006.01)
Patent
CA 2131050
The present invention is directed to an improved internal mold release system for the production of high density molded SRIM parts, i.e. molded parts having a density of from 1.3 to 2.0 g/cc. In particular, the process comprises reacting a reaction mixture comprising an organic polyisocyanate and at least one organic compound containing isocyanate-reactive hydrogens in the presence of a catalyst and an internal mold release agent in a closed mold. The internal mold release agent comprises: a) mixed esters comprising the reaction product of i) aliphatic dicarboxylic acids, ii) aliphatic polyols, and iii) monocarboxylic acids with 12 to 30 carbon atoms in the molecule. The reaction mixture may additionally comprise a fatty acid such as, for example, oleic acid.
Lesko Merle W.
Mitesser Richard W.
Parks Kristen L.
Corporation Bayer
Miles Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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