Low temperature self-crosslinking aqueous dispersions of urethan

Details Low temperature self-crosslinking aqueous dispersions of urethan Low temperature self-crosslinking aqueous dispersions of urethan

1997-06-16

1999-11-02

Redding, Judy M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523402, 523417, 524457, 524507, 524589, 524590, 524591, C08L 6300

Patent

active

059772158

ABSTRACT:
The present invention is directed to improved aqueous dispersions containing polyurethane/vinyl polymers. The improved aqueous dispersions comprise polymer particles of a urethane prepolymer having carboxyl functionality therein and a vinyl monomer polymerized thereon, which are shelf stable and self crosslinkable at a low temperature. The polyurethanes have pendant carboxyl functionality in quaternary form and pendant epoxide groups provided by glycidyl acrylates and/or methacrylates. When the aqueous dispersions are cast as film and the water is removed, crosslinking between the carboxyl group and the epoxide group occurs.

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