Stable nonaqueous polyurethane microparticle dispersions

Details Stable nonaqueous polyurethane microparticle dispersions Stable nonaqueous polyurethane microparticle dispersions

C - Chemistry, Metallurgy

08

L

400/5510, 400/74

C08L 75/04 (2006.01) C08G 18/08 (2006.01)

Patent

CA 1322803

Abstract A stable, nonaqueous polyurethane microparticle dispersion is characterized in that less than 20 percent of the polymer microparticles have a mean diameter greater than 5 microns. further characterized in that at a total solids content of 60 percent the Brookfield viscosity is less than 1000 centipoise measured at 50 RPM using a number 3 spindle at 25°C, the polyurethane being prepared from reactants which are substantially free of acrylic polymer and the polyurethane being further characterized in that it is substantially free of unreacted polyisocyanate monomer.

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