Two-colored molded product of polyurethanes made by RIM and proc

Stock material or miscellaneous articles – Composite – Of polyamidoester

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428195, 4283188, 4283202, 4283211, 4283222, 4284239, 4284242, 528 53, 528 55, 528 57, 521 51, 521 55, 521124, 521125, 264 464, 264 466, 264 54, 264255, 264267, B32B 2700

Patent

active

059621427

ABSTRACT:
A small amount of a non-yellowing surface-forming polyurethane material containing a polyether polyol, a hexamethylene diisocyanate trimer, a coloring agent and an organic bismuth catalyst is initially injected into a mold cavity under reduced pressure to form e.g. the surface portion of a polyurethane covering for a steering wheel. An inner-forming polyurethane material is subsequently injected into the cavity under reduced pressure to form an inner portion of the covering.

REFERENCES:
patent: 4025466 (1977-05-01), Jourquin et al.
patent: 4150206 (1979-04-01), Jourquin et al.
patent: 4389454 (1983-06-01), Horacek et al.
patent: 5071613 (1991-12-01), Fukami et al.
patent: 5159012 (1992-10-01), Doesburg et al.

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