Claims
- 1. A water-based ink comprising ink pigments dispersed with a grinding resin let down in a binder resin emulsion, wherein said grinding resin is the fusion esterification reaction product of:
- (a) 70 to 96% by weight of a member selected from the group consisting of fumarated rosin, maleated rosin, and combinations thereof;
- (b) 1 to 9% by weight of a polyol selected from the group consisting of pentaerythritol, glycerol, sorbitol, neopentyl glycol, ethylene glycol, and combinations thereof;
- (c) 1 to 9% by weight of polyethylene glycol having an average molecular weight in the range of 100-5,000; and
- (d) 2 to 40% by weight of a hydroxyacrylic resin comprising the free radical addition polymerization reaction product of:
- (1) 50.0-89.5 parts by weight of a member selected from the group consisting of styrene, alkyl acrylate, cycloalkyl acrylate, methacrylate, and combinations thereof, where the alkyl or cycloalkyl group contains 1-18 carbon atoms,
- (2) 10.0-50.0 parts by weight of a hydroxy-containing monomer, or combination of monomers, having the chemical structure: ##STR2## where R.sub.1 is a hydrogen or methyl group and R.sub.2 is a C.sub.2 -C.sub.4 alkylene,
- (3) 0.5-12.0 parts by weight of a peroxide or azo catalytic initiator, and
- (4) up to 10.0 parts by weight of a mercaptan-containing chain transfer agent.
- 2. The water-based ink of claim 1 wherein said hydroxyacrylic resin has a molecular weight in the range of 1,000 to 9,000.
- 3. The water-based ink of claim 1 wherein said hydroxyacrylic resin is a solid resin.
Parent Case Info
This application is a continuation-in-part of our commonly assigned, co-pending U.S. patent application Ser. No. 7/967,052 filed Oct. 28, 1992 now U.S. Pat. No. 5,216,071; which is a continuation-in-part of our commonly assigned, co-pending U.S. patent application Ser. No. 07/923,543 filed Aug. 3, 1992 now U.S. Pat. No. 5,189,090, entitled "Hydroxyacrylic Modified Rosin Resins For Water-Based Coatings"; which, in turn, was a continuation-in-part of U.S. patent application Ser. No. 07/796,651 filed Nov. 22, 1991, and expressly abandoned on Aug. 14, 1992.
US Referenced Citations (10)
Divisions (1)
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Date |
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Parent |
967052 |
Oct 1992 |
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Continuation in Parts (2)
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923543 |
Aug 1992 |
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Parent |
796651 |
Nov 1991 |
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