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US 5,026,755 AGranted
Water-based printing ink prepared from polyamide/acrylic graft copolymers
AssigneeSun Chemical Corporation
InventorsAlbert A. Kveglis, Robert J. Catena
Life of this patent
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Abstract
A water-dispersible graft copolymer of a polyamide and at least one acrylic monomer is prepared by reacting the polyamide with the acrylic monomer(s) in an alcohol solution in the presence of a free radical peroxidic initiator. The graft copolymer is particularly useful as the resin component of a water-based printing ink.
Claims30
A water-based printing ink comprising
- (a) a resin component, said resin component comprising at least about 15 wt. %, based on the weight of the resin component, of a graft copolymer of a polyamide and at least one acrylic monomer, said polyamide having a weight average molecular weight of at least about 15,000, the remainder of the resin component comprising unreacted polyamide and polymers of said acrylic monomer, said graft copolymer having a pH of at least
- (b) water;
- and
- (c) at least one pigment.
1 more element
An aqueous varnish comprising:
- (a) a resin component present as a solution in a C.sub.1 -C.sub.4 alcohol, said resin component comprising at least about 15 wt. %, based on the weight of the resin component, of a graft copolymer of a polyamide and at least one acrylic monomer, said polyamide having a weight average molecular weight of at least about 15,000, the remainder of the resin component comprising unreached polyamide and polymers of said acrylic monomer, said graft copolymer having a pH of at least 7, the resin component being present in an amount of about 10 to about 40 wt. % solids, based on the weight of the aqueous varnish;
- and
- (b) water.
Dependencies are inferred from the claim text.