Urethane modified waterborne dispersions

Details Urethane modified waterborne dispersions Urethane modified waterborne dispersions

1993-04-14

1994-11-29

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 320, C08L 6302

Patent

active

053691520

ABSTRACT:
An excess of a urethane modified polyfunctional epoxide compound is reacted with a tertiary amine salt to form a quaternized epoxy resin. The quaternized epoxy resin is then dispersed in water. Therein the residual epoxy functionality is reacted with a polyamine, to form a waterborne epoxy resin system. The urethane modification leads to significant improvements in properties such as dry rate, adhesion, and chemical resistance, particularly aviation hydraulic fluid resistance. The waterborne dispersions of the urethane modified epoxy resins are useful in coating, ink and adhesive applications at ambient and elevated temperature curing conditions.

REFERENCES:
patent: 3804786 (1974-04-01), Sekmakas
patent: 4260716 (1981-04-01), Christenson et al.
patent: 5089100 (1992-02-01), Debroy et al.

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