Polyurethanes prepared or combined with another material and a p

Details Polyurethanes prepared or combined with another material and a p Polyurethanes prepared or combined with another material and a p

1987-09-17

1988-10-04

Welsh, Maurice J.

Coating processes

With post-treatment of coating or coating material

Heating or drying

427386, 4284242, 4284244, 4284246, 4284248, 521 99, 521102, 5211091, 521114, 524 11, 524 37, 524 42, 524 77, 524310, 524313, 524378, 524755, 525129, 525130, 525131, 525454, C08G 1814

Patent

active

047755580

ABSTRACT:
Polyurethanes which have been prepared or combined with another material are made by combining or applying a polyurethane-forming reaction mixture or polyurethane to another material such as a PVC foil or textile. The polyurethane-forming mixture or polyurethane is made up of an organic polyisocyanate, a high molecular weight isocyanate reactive material, a catalyst and a stabilizer against thermolysis and contact discoloration. The required stabilizer is an epoxide having an epoxide equivalent weight between 57 and 10,000. Other additives commonly used in polyurethane chemistry such as blowing agents, chain extenders and surfactants may also be employed. The polyurethane composites thus produced are characterized by improved thermal stability and reduced discoloration.

REFERENCES:
patent: 3281379 (1966-10-01), Fontaine et al.
patent: 4271230 (1981-06-01), Sakano et al.

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