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...
Patent
1987-12-03
1988-11-08
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...
524872, 524873, 524875, 528 48, 528 76, 528 83, C08L 7500
Patent
active
047835028
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.degree. 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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Faler Dennis L.
Hartman Marvis E.
McCollum Gregory J.
O'Dwyer James B.
Pingitore Linda
PPG Industries Inc.
Welsh Maurice J.
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