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
1984-06-01
1985-01-29
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...
4273855, 528 67, 528 73, C08G 1838
Patent
active
044966849
ABSTRACT:
Uretdione group-containing polyurethane oligomers are prepared by reacting a hydroxyl-terminated prepolymer with a dicarboxylic acid anhydride. The hydroxyl-terminated prepolymer is the reaction product of a uretdione group-containing organic polyisocyanate with an isocyanate reactive hydrogen atom-containing compound. The polyurethane oligomers are useful in the preparation of aqueous polyurethane dispersions, which can be used as adhesives in making molded wood products, and as coatings and other useful products.
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Saunders et al., Polyurethanes, Part I, Interscience, NY, 1962, pp. 91-94.
O'Connor James M.
Schnabel Wilhelm J.
Olin Corporation
Sabo William D.
Welsh Maurice J.
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