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US 6,444,022 B1Granted
Water based offset lithographic printing ink
AssigneeSun Chemical Corporation
InventorsRamasamy Krishnan, Martin Thomas Czebotar, Hugo Babij
Life of this patent
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Abstract
A water based offset lithographic ink comprising water; a modified rosin polymer comprised of resins soluble in water regardless of the pH of the water, resin rosin salts soluble in water at pH ranging from 7.5 to 10 and aqueous emulsion resins; a modified linseed oil; and pigment.
Claims22
A water based offset lithographic printing ink comprising:
- (a) water;
- (b) a modified rosin polymer, in an amount of from about 10 wt. % to about 70 wt. %, based on a total weight of the ink, the modified rosin polymer including at least one compound selected from the group (i)-(iv) consisting of:
- (i) a resin soluble in water regardless of the pH of the water, in an amount of from 0 to about 5 wt. %, based on the total weight of the ink,
- (ii) a rosin resin salt soluble in water at a pH ranging from about 7.5 to about 10, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink,
- (iii) an aqueous emulsion forming resin, in an amount of from 0 wt. % to about 20 wt. %, based on the total weight of the ink, and
- (iv) combinations of at least two of (ii) and one or more of (i) and (iii);
- (c) a polyol modified linseed oil having increased water solubility;
- and
- (d) pigment.
6 more elements
A water based offset lithographic printing ink comprising:
- a. water, in an amount of from about 25 wt. % to about 60 wt. %, based on a total weight of the ink;
- b. a modified rosin polymer, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink, the modified rosin polymer including at least one compound selected from the group (i)-(iv) consisting of:
- (i) a resin soluble in water regardless of the pH of the water, in an amount of from 0 to about 5 wt. %, based on the total weight of the ink,
- (ii) a rosin resin salt soluble in water at a pH ranging from about 7.5 to about 10, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink,
- (iii) an aqueous emulsion-forming resin, in an amount of from 0 wt. % to about 20 wt. %, based on the total weight of the ink, and
- (iv) combinations of at least two of (ii) and one or more of (i) and (iii);
- (c) a linseed oil that has been modified to have increased water solubility, in an amount of from about 25 wt. % to about 60 wt. %, based on the total weight of the ink;
- and
- (d) pigment, in an amount of from about 2 wt. % to about 30 wt. %, based on the total weight of the ink.
6 more elements
A water based offset lithographic printing ink comprising:
- (a) water, in an amount of from about 25 wt. % to about 60 wt. %, based on a total weight of the ink;
- (b) a modified rosin polymer, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink, the modified rosin polymer including at least one compound selected from the group (i)-(iv) consisting of:
- (i) a resin soluble in water regardless of the pH of the water, selected from the group consisting of:
- carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxybutylmethylcellulose, poly(C1-C4)alkylene oxides, polyethyleneimine, polyvinyl alcohol, polyvinyl acetate, polyvinylpyrrolidone, polyvinyl oxazolidone and polyacrylamide, in an amount of from 0 to about 5 wt. %, based on the total weight of the ink,
- (ii) a rosin resin salt soluble in water at a pH ranging from about 7.5 to about 10, selected from the group consisting of:
- methacrylic resins;
- styrene acrylic resins;
- polystyrene sulfonic acid resins;
- and corresponding salts thereof, in an amount of from about 10 wt. % to about 70 wt. %, based on the total weight of the ink,
- (iii) an aqueous emulsion forming resin, selected from the group consisting of:
- acrylic polymers, prepared from acrylic monomers selected from the group consisting of:
- acrylic acid esters, methacrylic acid esters, and methyl methacrylate;
- and vinyl polymers, prepared from vinyl monomers selected from the group consisting of:
- styrene, vinylstyrene, and vinyl acetate, in an amount of from 0 wt. % to about 20 wt. %, based on the total weight of the ink, and
- (iv) combinations of at least two of (ii) and one or more of (i) and (iii);
- (c) a linseed oil that has been modified by reacting it with a polyethylene glycol having an average molecular weight of from 200 to 600, to have increased water solubility, in an amount of from about 25 wt. % to about 60 wt. %, based on the total weight of the ink;
- and
- (d) pigment, in an amount of from about 2 wt. % to about 30 wt. %, based on the total weight of the ink.
15 more elements
Dependencies are inferred from the claim text.