Heat stable, pigmented sintered material comprising a boride, carbide, silicide, nitride or phosphide
AssigneeCiba Specialty Chemicals Corporation
InventorsSeiji Homma, Hans-Thomas Schacht, Zhimin Hao
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Abstract
The present invention relates to a process for pigmenting a porous sintered material comprising boride, carbide, silicide, nitride or phosphide compounds by applying a solution of a soluble pigment derivative to the non-coloured sintered material and regenerating the organic pigment by heating, whereby the organic pigment is deposited into the sintered material's pores, as well as to the new pigmented sintered materials themselves.
Claims9
A process for pigmenting a porous sintered material comprising a boride, carbide, silicide, nitride or phosphide compound with an organic pigment by
- (a) treating said sintered material with a solution or melt of a soluble pigment precursor such that at least part of the pigment precursor enters its pores, and
- (b) forming said organic pigment within the pores, through thermal fragmentation of the pigment precursor that has entered the pores of the sintered material in accordance with treatment (a), by means of heating,
- wherein said soluble pigment precursor is a compound of the formula (I) or a mixture of 2 or more compounds of the formula (I)
- A(B)x (I),
- in which x is an integer from 1 to 8,
- A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, indanthrone, isoindolinone, isoindoline, dioxazine, azo, phthalocyanine or diketopyrrolopyrrole series which is attached to x groups B via one or more heteroatoms selected from the group consisting of N, O and S and forming part of the radical A,
- B is hydrogen or a group of the formula
- where at least one group B is not hydrogen and, if x is from 2 to 8, the groups B can be identical or different, and
- L is any suitable solubilizing group.
A porous sintered material comprising a boride, carbide, silicide, nitride or phosphide compound, wherein said sintered material comprises a pigment precursor which is soluble at a concentration of at least 0.01% by weight in an organic solvent and can be fragmented to an organic pigment by means of heating or irradiation.
A porous sintered material comprising a boride, carbide, silicide, nitride or phosphide compound, wherein said sintered material comprises a pigment precursor which is soluble at a concentration of at least 0.01% by weight in an organic solvent and can be fragmented to an organic pigment by means of heating or irradiation, wherein said pigment precursor is a compound of the formula (I) or a mixture of 2 or more compounds of the formula (I)
- A(B)x (I),
- in which x is an integer from 1 to 8,
- A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, indanthrone, isoindolinone, isoindoline, dioxazine, azo, phthalocyanine or diketopyrrolopyrrole series which is attached to x groups B via one or more heteroatoms selected from the group consisting of N, O and S and forming part of the radical A,
- B is hydrogen or a group of the formula
- where at least one group B is not hydrogen and, if x is from 2 to 8, the groups B can be identical or different, and
- L is any suitable solubilizing group.
Dependencies are inferred from the claim text.