Process for the preparation of molded parts of polyurethane or p

Details Process for the preparation of molded parts of polyurethane or p Process for the preparation of molded parts of polyurethane or p

1982-06-28

1984-09-04

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 53, 264 54, 2643286, 264DIG83, 521129, 528 53, B29D 2700, C08G 1820, C08J 904, C08K 534

Patent

active

044696531

ABSTRACT:
The invention relates to a process for the preparation of polyurethane or polyurethane-polyurea molded parts by reacting organic polyisocyanates, polyols and chain extenders in the presence of monocyclic amidines having the formula ##STR1## as catalyst or catalyst mixtures of monocyclic amidines having the formula (I) and (a) tertiary amines, (b) metal salts having the formula Me X.sub.n Y.sub.m (II), and/or (c) optionally-substituted aliphatic carboxylic acids. R.sup.1 and R.sup.2, Me, X, Y, n, and m are defined herein.

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Knipp, Ulrich "Plastics for Automobile Safety Bumpers," in Journal of Cellular Plastics, vol. 9, No. 2, Mar./Apr. 1973, pp. 76-84.
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