Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1978-05-01
1981-01-20
Lieberman, Paul
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
20415915, 525455, 525920, C08L 7506, C08L 7508
Patent
active
042463793
ABSTRACT:
Unsaturated addition-polymerizable urethane resins prepared from at least one polyisocyanate, at least one monomeric or polymeric polyol, and at least one unsaturated addition-polymerizable monomeric organic compound characterized by the presence of a single isocyanate-reactive active hydrogen group, wherein said polyol has a hydroxyl functionality of at least 2.1, and the amount of polyisocyanate is sufficient to provide an NCO:OH ratio, with respect to said polyol, of at least 2.1:1, are characterized by reduced viscosity, improved physical stability, and by improved solubility and compatibility in organic solvents/diluents. Particularly advantageous resins are obtained by employing isocyanate-functional prepolymers as precursors for such unsaturated addition-polymerizable urethane resins.
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Gazewood John A.
Lieberman Paul
Lord Corporation
Wright James W.
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