Urethane prepolymer, process for producing urethane prepolymer,

Details Urethane prepolymer, process for producing urethane prepolymer, Urethane prepolymer, process for producing urethane prepolymer,

1996-07-30

1998-06-09

Cooney, Jr., John M.

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...

524591, 524839, 524840, 528 71, C08J 300, C08G 1828

Patent

active

057635269

ABSTRACT:
A polyurethane dispersion is disclosed, which is obtained by a process comprising the step of reacting a urethane prepolymer having both at least one anionic group and at least one cationic group in the molecule and having an isocyanate group at each of molecular ends thereof with a chain extender in water. The polyurethane dispersion is capable of forming a coating film having high acid and alkali resistance and has satisfactory dispersion stability.

REFERENCES:
patent: 5561187 (1996-10-01), Bechara et al.
patent: 5608000 (1997-03-01), Duan et al.
patent: 5610232 (1997-03-01), Duan et al

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