Additive composition for water-based inks
AssigneePetrolite Corporation
InventorsTimothy J. Baker, John H. Woods, Jeffrey R. Zerr
Life of this patent
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Abstract
An aqueous dispersion useful in formulating water-based printing inks is provided. The dispersion contains water, an alkoxylated primary linear polymeric alcohol dispersant and a finely divided mostly linear aliphatic hydrocarbon having a molecular weight of about 300-3,000 and/or a finely divided chemically modified mostly linear aliphatic hydrocarbon having a molecular weight of about 300-3,000.
Claims22
A water-based ink containing a pigment and an effective amount of a formulation aid comprising in an aqueous dispersion:
- (a) water;
- (b) a dispersant represented by the formula:
- ##STR3## wherein R and R.sub.1 are independently selected from the group consisting of hydrogen and C.sub.1 -C.sub.10 alkyl;
- R.sub.2 is selected from the group consisting of hydrogen and methyl and x is about 8 to about 75 and n is about 2 to about 65;
- and
- (c) a finely divided mostly linear aliphatic hydrocarbon and/or modified hydrocarbon having a molecular weight of about 300-3,000 and an average particle size of less than about 20 microns.
A water-based pigmented ink containing an effective amount of a formulation aid comprising in an aqueous dispersion:
- (a) water;
- (b) a dispersant represented by the formula:
- ##STR4## wherein R and R.sub.1 are independently selected from the group consisting of hydrogen and C.sub.1 -C.sub.10 alkyl;
- R.sub.2 is selected from the group consisting of hydrogen and methyl and x is about 8-75 and n averages 4-50;
- and
- (c) a mixture of:
- (1) a finely divided unoxidized polyethylene of a molecular weight of about 700 to about 3,000;
- and
- (2) a finely divided oxidized polyethylene of a molecular weight of about 700 to about 3,000.
A water-based pigmented ink containing an effective amount of a formulation aid comprising in an aqueous dispersion:
- (a) about 30-92% by weight of water;
- (b) about 2-40% by weight of a dispersant represented by the formula:
- ##STR5## wherein R and R.sub.1 are independently selected from the group consisting of hydrogen and C.sub.1 -C.sub.10 alkyl;
- R.sub.2 is selected from the group consisting of hydrogen and methyl and x is about 8-75 and n averages about 4-50;
- and
- (c) about 1-60% by weight of a mixture of:
- (1) a finely divided unoxidized polyethylene of a molecular weight of about 700 to about 3,000;
- and
- (2) a finely divided oxidized polyethylene of a molecular weight of about 700 to about 3,000.
Dependencies are inferred from the claim text.