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US 12,043,745 B2Granted
Hybrid pigments and methods of making same
AssigneeDay-Glo Color Corp.
InventorsThomas Dipietro, Liming Tang, Christopher Newbacher
Life of this patent
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Abstract
Provided herein are hybrid pigments and methods of making the same. The hybrid pigments include a natural polyamide substrate and an acid dye disposed on the natural polyamide substrate. The hybrid pigments are biodegradable, compostable, or both, and provide an environmentally friendly alternative to synthetic polymer particle-based pigments.
Claims27
A hybrid pigment comprising:
- from 90% to 99% by weight of a natural polyamide substrate;
- and
- from 1% to 10% by weight of an acid dye disposed on the natural polyamide substrate.
A method of making a hybrid pigment comprising:
- a) preparing a suspension comprising water and a natural polyamide substrate;
- b) heating the suspension with agitation;
- c) adding with agitation an acid dye to the suspension;
- d) separating solids from the suspension to form a wet cake;
- e) drying the wet cake to form a dry cake;
- and
- f) comminuting the dry cake to form the hybrid pigment.
4 more elements
A hybrid pigment comprising:
- a natural polyamide substrate;
- and
- an acid dye disposed on the natural polyamide substrate,
- wherein the hybrid pigment has an average particle size of less than 30 μm.
1 more element
Dependencies are inferred from the claim text.