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US 5,208,319 AGranted
Rosin-based grind resins for aqueous printing inks
AssigneeWestvaco Corporation
InventorPeter Schilling
Life of this patent
Estimating the term…
Abstract
The invention is ink pigment grinding resins for waterbased printing inks which are produced by the amidation of maleated or fumarated rosin with a polyamine containing a primary amine group to produce the water soluble polyaminoamidoimide resin. The resulting rosin resin may be employed over a wide range of pH values to produce stable low or high viscosity grind bases.
Claims20
A water soluble grinding resin comprising the reaction product of:
- (a) 100 parts by weight of rosin reacted in a cycloaddition reaction with 5 to 30 parts by weight of a member selected from the group consisting of maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, and fumaric acid to produce a rosin adduct;
- and
- (b) 100 parts by weight of said rosin adduct reacted in a condensation reaction with 5 to 25 parts by weight of a polyamine containing at least one primary amine group to produce said reaction product.
Dependencies are inferred from the claim text.