Process for surface-treated organic pigments
AssigneeBayer Aktiengesellschaft
InventorsIbraheem T. Badejo, Charles E. Shannon, Guenter G. Franke
Life of this patent
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Abstract
This invention relates to a process for preparing pigment compositions comprising (a) treating an organic pigment with (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine, (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble, thereby forming a suspension of the surface-treated pigment composition in the liquid; (b) exposing the suspension to cavitating conditions; and (c) collecting the pigment composition.
Claims13
A process for preparing a pigment composition comprising
- (a) treating an organic pigment with
- (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,
- (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and
- (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,
- thereby forming a suspension of the surface-treated pigment composition in the liquid;
- (b) exposing the suspension to ultrasound;
- and
- (c) collecting the pigment composition.
A pigment composition prepared according to a process comprising
- (a) treating an organic pigment with
- (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,
- (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and
- (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,
- thereby forming a suspension of the surface-treated pigment composition in the liquid;
- (b) exposing the suspension to ultrasound;
- and
- (c) collecting the pigment composition.
A pigmented macromolecular material containing as pigment a pigment composition prepared according to a process comprising
- (a) treating an organic pigment with
- (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,
- (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and
- (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,
- thereby forming a suspension of the surface-treated pigment composition in the liquid;
- (b) exposing the suspension to ultrasound;
- and
- (c) collecting the pigment composition.
A pigmented coating composition containing as pigment a pigment composition prepared according to a process comprising
- (a) treating an organic pigment with
- (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,
- (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and
- (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,
- thereby forming a suspension of the surface-treated pigment composition in the liquid;
- (b) exposing the suspension to ultrasound;
- and
- (c) collecting the pigment composition.
A pigmented printing ink containing as pigment a pigment composition prepared according to a process comprising
- (a) treating an organic pigment with
- (1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,
- (2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and
- (3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,
- thereby forming a suspension of the surface-treated pigment composition in the liquid;
- (b) exposing the suspension to ultrasound;
- and
- (c) collecting the pigment composition.
Dependencies are inferred from the claim text.