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US 6,605,731 B2Granted
Magenta colorants
AssigneeMilliken & Company
InventorsRajnish Batlaw, Patrick D. Moore
Life of this patent
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Abstract
Novel addition products of isocyanates with oxyalkylene-substituted aminophenol compounds as intermediates for the production of urethane-substituted xanthene colorants, particularly triphenylmethane derivatives such as rhodarnines, are provided. The xanthene colorants exhibit improved wax and/or oil solubility and high purity. The urethane-substituted xanthene, colorant features very good wax and/or oil solubility, and is believed to be relatively nontoxic. A method for producing this novel colorant is also provided.
Claims1
A xanthene compound having the structure of Formula (II)
- wherein x+y is greater than 0 and less than 4;
- wherein R is selected from the group consisting of hydrogen, halo, formyl, C1-C20 alkoxy, and C1-C20 alkyl;
- wherein R′ is selected from the group consisting of C1-C10 alkoxy, C1-C10 polyoxyalkoxy, C1-C10 alkylester, and C1-C10 alkyl;
- and wherein R″ is selected from the group consisting of hydrogen and C1-C4 alkyl groups;
- and wherein R′″ is selected from the group selected from hydrogen and C1-C24 alkyl groups;
- or any salts thereof.
3 more elements
Dependencies are inferred from the claim text.