Patent ID: 6384110
Filing Date: 2002-05-07
Classification: C08F,C08L,C09D

Abstract:
A process for preparing an aqueous monomer/oil-modified polyurethane emulsion which comprises:mixing at least one oil-modified polyurethane resin having at least two carbon-carbon double bonds in at least one ethylenically unsaturated monomer or mixture thereof, thereby forming an oil-modified-polyurethane-resin-in-monomer solution, and combining the oil-modified-polyurethane-resin-in-monomer solution solution with water, and at least one surfactant, and agitating the resulting mixture under high shear; thereby obtaining an aqueous monomer emulsion comprising: an aqueous continuous phase; and an organic disperse phase; the organic disperse phase comprising: said at least one ethylenically unsatured monomer or mixture thereof and said at least one oil-modified polyurethane resin; and said organic disperse phase being in the form of droplets having an average droplet diameter range from about 10 to about 1,000 nanometers; wherein said oil-modified-polyurethane-resin-in-monomer solution comprises: about 10 percent to about 120 percent of oil-modified polyurethane resin based on the weight of the at least one ethylenically unsaturated monomer.