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US 6,486,248 B2Granted
Liquid colorant and method
AssigneeMilliken & Company
InventorsDavid E. Ashley, Leonard J. Starks, Paul D. Halphen
Life of this patent
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Abstract
A solvent free, diluent free, hydrocarbon soluble liquid polymeric colorant. Also disclosed is a method for applying a liquid colorant to solid granular substrates, such as fertilizer, to provide a colored substrate where the colorant exhibits a reduced tendency to bleed or migrate from the surface of the colored substrate onto other surfaces.
Claims17
A method for coloring solid granular substrates, said method comprising the steps of:
- providing a solvent free, diluent free, liquid hydrocarbon soluble colorant having a viscosity level of less than 1000 cps;
- adding said colorant to an oleophilic binder;
- and
- applying said colorant and said binder to a solid granular substrate.
1 more element
A solvent free, diluent free, liquid hydrocarbon soluble colorant comprising:
- a chromophore;
- an oleophilic binder;
- and
- an alcohol including a carbon chain having a carbon chain from between C3--C30.
1 more element
A solvent free, diluent free, liquid hydrocarbon soluble colorant comprising:
- a chromophore;
- an oleophilic binder;
- and
- at least one reactive group selected from the group consisting of alkoxylated alcohol, fatty acid, amine, amide, ester of alkoxylated fatty alcohol, alkoxylated triglyceride, mono-, di, tri-ester of alkoxylated triglyceride, alkoxylated polyhydric alcohol or esters thereof, or polyether carboxylate or esters thereof.
1 more element
Dependencies are inferred from the claim text.