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US 12,595,373 B2Granted
Titanium dioxide pigment with coloring after-treatment
AssigneeKronos International, Inc.
InventorsNorbert Bendzko, Frank Mersch
Life of this patent
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Abstract
The invention relates to a colored pigment particle, a method for obtaining said colored pigment particle, and a composition comprised of said particle. In addition, the invention refers to the use of said colored pigment particle.
Claims20
A colored pigment particle comprising:
- a titanium dioxide based pigment;
- and
- at least one layer, wherein, the at least one layer is modified with a coloring component, wherein the coloring component is selected from the group consisting of Co3(PO4)3, NH4MnP2O7, Fe4[Fe(CN)6]3, PbCrO4, BaMnO4, BaCrO4, Fe(OH)3, Fe(OH)2, Cu(OH)2, Ni(OH)2, Co(OH)2, Cr(OH)3, Mn(OH)2, V(OH)5, Bi(OH)3, Cu2O, CuO, CoO, CrO, Cr2O3, CrO2, MnO, Mn2O3, Mn3O4, VO, V2O3, VO2, V2O5, Bi2O3, Bi2O5, La2O3, La(OH)3, CeO2, Ce2O3, Ce3O4, Ce(OH)3, Ce(OH)4, Pr6O11, Pr(OH)3, Ne2O3, Nd(OH)3, Pm2O3, Pm(OH)3, Sm2O3, Sm(OH)3, Eu2O3, Eu(OH)3, Gd2O3, Gd2(OH)3, Tb4O7, Tb(OH)3, Dy2O3, Dy(OH)3, Ho2O3, Ho(OH)3, Er2O3, Er(OH)3, Tm2O3, Tm(OH)3, Yb2O3, Yb(OH)3, Lu2O3, Lu(OH)3, and mixtures thereof.
A colored pigment particle comprising:
- a titanium dioxide based pigment;
- and
- at least one layer, wherein, the at least one layer is modified with a coloring component, wherein:
- the at least one layer is selected from the group consisting of silicon dioxide, aluminum oxide, zirconium oxide, manganese oxide, cerium oxide, titanium dioxide, sulfate and phosphate based inorganic compounds or a mixture thereof;
- the coloring component is selected from the group consisting of Co3(PO4)3, NH4MnP2O7, Fe4[Fe(CN)6]3, PbCrO4, BaMnO4, BaCrO4, Fe(OH)3, Fe(OH)2, Cu(OH)2, Ni(OH)2, Co(OH)2, Cr(OH)3, Mn(OH)2, V(OH)5, Bi(OH)3, FeO, Fe2O3, Cu2O, CuO, CoO, CrO, Cr2O3, CrO2, MnO, Mn2O3, Mn3O4, VO, V2O3, VO2, V2O5, Bi2O3, Bi2O5, La2O3, La(OH)3, CeO2, Ce2O3, Ce3O4, Ce(OH)3, Ce(OH)4, Pr6O11, Pr(OH)3, Ne2O3, Nd(OH)3, Pm2O3, Pm(OH)3, Sm2O3, Sm(OH)3, Eu2O3, Eu(OH)3, Gd2O3, Gd2 (OH)3, Tb4O7, Tb(OH)3, Dy2O3, Dy(OH)3, HO2O3, Ho(OH)3, Er2O3, Er(OH)3, Tm2O3, Tm(OH)3, Yb2O3, Yb(OH)3, Lu2O3, Lu(OH)3, and mixtures thereof;
- the colored pigment further comprising a final layer comprising a silicon based organic compound;
- and
- the pigment particle comprises from about 1 wt. % to about 2 wt. % of the coloring component based on total weight of the colored pigment particle.
5 more elements
A method for obtaining a colored pigment particle comprised of the following steps:
- a) providing an aqueous suspension of a titanium dioxide based pigment,
- b) adding a layer precursor to said suspension,
- c) adding a coloring component to said suspension, and
- d) forming a layer from the layer precursor modified with the coloring component onto the titanium dioxide based pigment to obtain the colored pigment particle;
- wherein steps (b) and (c) can be performed in any order or concurrently;
- and wherein the resulting colored pigment particle comprises the titanium dioxide based pigment and at least one layer that is modified with the coloring component, wherein the coloring component is selected from the group consisting of Co3(PO4)3, NH4MnP2O7, Fe4[Fe(CN)6]3, PbCrO4, BaMnO4, BaCrO4, Fe(OH)3, Fe(OH)2, Cu(OH)2, Ni(OH)2, Co(OH)2, Cr(OH)3, Mn(OH)2, V(OH) s, Bi(OH)3, Cu2O, CuO, CoO, CrO, Cr2O3, CrO2, MnO, Mn2O3, Mn3O4, VO, V2O3, VO2, V2O5, Bi2O3, Bi2O5, La2O3, La(OH)3, CeO2, Ce2O3, Ce3O4, Ce(OH)3, Ce(OH)4, Pr6O11, Pr(OH)3, Ne2O3, Nd(OH)3, Pm2O3, Pm(OH)3, Sm2O3, Sm(OH)3, Eu2O3, Eu(OH)3, Gd2O3, Gd2 (OH)3, Th4O7, Tb(OH)3, Dy2O3, Dy(OH)3, HO2O3, Ho(OH)3, Er2O3, Er(OH)3, Tm2O3, Tm(OH)3, Yb2O3, Yb(OH)3, Lu2O3, Lu(OH)3, and mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.