Aqueous dispersion blends of polyesters and polyurethane materia

Details Aqueous dispersion blends of polyesters and polyurethane materia Aqueous dispersion blends of polyesters and polyurethane materia

1988-02-02

1989-07-11

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 94, 524107, 524159, 524160, 524190, 524376, 524377, 524386, 524389, 524431, 524539, 524538, 525424, 525440, C08K 534, C08K 515, C08K 523, C08L 6702

Patent

active

048473162

ABSTRACT:
Compositions useful as printing inks or as dry or wet concentrates for the preparation of inks, comprising substantially homogenous blends of from about 0.1 to about 50.0 wt. % water dispersible polyurethane, and conversely from about 99.9 to about 50.0 wt. % water dispersible polyester, and preferably containing from about 1.0 to about 95.0 wt. % of a solvent system comprising water or water admixed with cosolvent, the cosolvent comprising up to about 30.0 wt. % of the solvent system. These blends show exceptionally marked improvements in certain physical properties such as: stability of viscosity to ambient and process conditions; linearity of viscosity change with water dilution; consistency of viscosity for a great variety of pigments; and greatly improved shelf-life (no significant polymer segregation of layering). Such properties greatly enhance the utility of these blends for use in pigmented or dyed printing inks and in other substrate coating formulations which may or may not contain colorants. Also disclosed is a process useful for the preparation of such compositions.

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