Polyurethane and/or polyurea dispersions in active hydrogen-cont

Details Polyurethane and/or polyurea dispersions in active hydrogen-cont Polyurethane and/or polyurea dispersions in active hydrogen-cont

1989-09-12

1991-11-26

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

25218227, 521115, 521137, 524757, 524762, 525458, C08L 7504

Patent

active

050682806

ABSTRACT:
Polyurethane and/or polyurea dispersions are prepared by reacting certain coreactants with a polyisocyanate in the presence of a preformed polyurethane and/or polyurea dispersion. The resulting products are epsecially useful to prepare flexible polyurethane foams which exhibit low shrinkage. In addition, polyurethane and/or polyurea dispersions having a bimodal particle size distribution are disclosed.

REFERENCES:
patent: 4785026 (1988-11-01), Yeakey et al.

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