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US 5,349,021 AGranted
Thermosetting printing ink composition
AssigneeSun Chemical Corporation
InventorsJohn M. Rooney, Narendra M. Patel, Albert A. Kveglis, Robert J. Catena, Leonard Di Leo, Selcuk Avci
Life of this patent
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Abstract
A thermosetting printing ink composition comprising a functional copolymer of a thermosettable polyester and a polysiloxane, a pigment, a crosslinking agent and a curing catalyst which may be a strong acid or a metal salt thereof. The composition desirably also includes a reactive diluent such as a glycol, glycol ether or alcohol. The compositions are especially useful for imprinting metal containers such as beer and soda cans.
Claims11
A thermosetting printing ink composition comprising:
- (a) a copolymer of a thermosettable polyester and a polysiloxane comprising a hydrogen-terminated polyalkylene oxide-modified polymethylsiloxane having a number average molecular weight of about 3,000 to 5,000 and the general formula:
- ##STR4## wherein PE=--CH.sub.2 CH.sub.2 CH.sub.2 O(EO).sub.m (PO).sub.n (BO).sub.q H in which EO=ethyleneoxy, PO=propyleneoxy and BO=butyleneoxy, and m, n and q are independently integers of 0 to 10, and the sum of m, n and q is at least 1, x is an integer having a value of 0 to about 250 and y is an integer having a value of 1 to about 500, and the polysiloxane content of the copolymer is in the range of 1.9 to 5 wt. %, based on the weight of the copolymer;
- (b) a pigment;
- (c) a crosslinking agent;
- and
- (d) a curing catalyst comprising a strong acid or metal salt thereof.
3 more elements
Dependencies are inferred from the claim text.