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US 8,574,466 B2Granted
Modified polyamine
AssigneeAjinomoto Co., Inc.
InventorYuji Koshima
Life of this patent
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Abstract
A pigment dispersant which includes a modified polyamine obtained by the reaction of a polyamine having two or more primary and/or secondary amino groups per molecule and containing 2 to 1800 nitrogen atoms per molecule, a polyester, and a phosphorus-containing compound. The modified polyamine exhibits excellent pigment dispersion performance, shows little change in color tone upon heating, and has excellent heat resistance.
Claims18
A modified polyamine produced by a reaction of:
- (i) a polyamine containing 2 to 1800 primary and/or secondary amino groups per molecule;
- (ii) a polyester;
- and
- (iii) a phosphorus-containing compound selected from the group consisting of a compound represented by the formula (1), a tautomer thereof, a metal salt thereof, and an amine salt thereof:
- wherein R1 and R2 each independently represent hydrogen, a hydroxy group, a cyano group, or —O—R3, and R3 represents a hydrocarbon group having 1 to 24 carbon atoms, wherein
- the polyamine and the phosphorous-containing compound form a salt through a free amino group of the polyamine and a hydroxyl group of the phosphorous-containing compound, and
- an amount of the phosphorus-containing compound is from 0.004 to 0.7 mol/a number of moles of amino groups with respect to the number of moles of the primary and/or secondary amino groups of the polyamine.
4 more elements
Dependencies are inferred from the claim text.