Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1993-12-21
1996-03-26
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
264 41, 264 455, 264 51, 2643281, 2643282, 2643286, 521155, 521159, 521160, 521163, 521170, 528 52, 528 53, 528 55, 528 58, 528 59, 528 60, 528 61, 528 65, 528 67, 528 76, 528 85, C08G 1814
Patent
active
055021476
ABSTRACT:
The present invention is directed to polyurethane moldings produced via the RIM process. These polyurethane moldings have excellent reactivity, demold properties (at a 30 s demold), and good elongation and tear strength, and comprise the reaction product of an aliphatic polyisocyanate having a viscosity of less than about 20,000 mPa.multidot.s at 25.degree. C. and a NCO functionality of 2.3 to 4.0 with an isocyanatereactive component comprising b1) a relatively high molecular weight organic compound containing at least one of the groups selected from the group consisting of hydroxy groups and amine groups; and b2) a low molecular weight chain extender selected from the group consisting of diols, triols, primary amines, secondary amines, aminoalcohols, and mixtures thereof; in the presence of a catalyst. The OH:NH ratio of the chain extender is from 1:1 to 25:1.
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Keegan Richard E.
Loring Robert M.
Magnotta Albert
Nodelman Neil H.
Slack William E.
Bayer Corporation
Brown N. Denise
Cooney Jr. John M.
Gil Joseph C.
Seidleck James J.
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