METHOD FOR MANUFACTURING BISMUTH VANADATE PIGMENT HAVING AN IMPROVED ALKALINE RESISTANCE

The present invention is directed to a method for manufacturing a bismuth vanadate pigment having an improved alkaline resistance, the method comprising: 115-. (canceled)16. A method for manufacturing a bismuth vanadate pigment having an improved alkaline resistance , the method comprising:(a) obtaining a dried bismuth vanadate pigment;(b) encapsulating the bismuth vanadate pigment with a functionalized silane having the formula R—Si(OR′)3 wherein R is an alkyl group; and R′ is a methyl or ethyl group to form an encapsulated pigment;(c) final processing of the encapsulated pigment; and(d) drying the pigment.17. The method of claim 16 , wherein R is an alkyl group having more than 10 carbon atoms; and R′ is a methyl or ethyl group.18. The method of claim 16 , wherein R is an alkyl group having more than 10 carbon atoms and one or more substituents comprising an aryl group and one or more fluorine atoms.19. The method of claim 16 , wherein the functionalized silane is a mix of(a) a functionalized silane of the formula R—Si(OR′)3 wherein R is an alkyl group having more than 10 carbon atom(s); and R′ is a methyl or ethyl group, and(b) a functional silane selected from the group consisting of amino-3-propyltriethoxysilane, N-(2-aminoethyl-3-aminopropyl)-trimethoxysilane, phenyltriethoxysilane, hexadecyltrimethoxysilane, propyltrimethoxysilane, methyltriethoxysilane, N-benzyl-N-aminoethyl-3-aminopropyltrimethoxysilane, N-vinylbenzyl-N′-aminoethyl-3-aminopropylpolysiloxane, N-(n-butyl)-3-aminopropyltrimethoxysilane, and combinations thereof.20. The method of claim 16 , wherein the method further comprises the step of reslurrying the pigment by adding water to form a dispersion claim 16 , and stirring said dispersion at a temperature ranging from 10° C. to 100° C. claim 16 , for a time period ranging from 30 minutes to 140 minutes.21. The method of claim 16 , wherein encapsulating comprises adding the functionalized silane in a range from 0.1% to 10% by weight with respect ...

Method For Manufacturing Bismuth Based Pigment Having An Improved Alkaline Resistance By Encapsulating Said Pigment With A Chelating Agent

The present invention is directed to a method for manufacturing a bismuth based pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth based pigment; ii) encapsulation of the bismuth based pigment using a chelating agent; iii) final processing of the encapsulated pigment; and v) drying of the pigment. In addition, the present invention is directed to a bismuth based pigment encapsulated by a layer of chelating agent. 1. A method for manufacturing a bismuth based pigment having an improved alkaline resistance , the method comprising:i) providing a dried bismuth based pigment;ii) encapsulating the bismuth based pigment with a chelating agent, wherein encapsulation is performed in a slurry; andiii) drying of the pigment.2. The method of claim 1 , wherein the method further comprises a step of forming the slurry by:adding the pigment to water to form a dispersion; andstirring said dispersion at a temperature between 10° C. and 100° C., for a time period between 30 minutes and 120 minutes.3. The method of claim 2 , wherein the step of forming a slurry is performed prior to the step of encapsulating.4. The method of claim 3 , wherein the step of encapsulating comprises adding the chelating agent to the slurry in an amount between 0.1% and 30% of the weight of the pigment.5. The method of claim 1 , wherein the step of encapsulating comprises forming the slurry by adding the pigment to an aqueous solution that includes the chelating agent at a concentration between 0.1% and 50%.6. The method of claim 4 , wherein one or more inorganic compounds are added to the slurry before the chelating agent is added to the slurry claim 4 , said inorganic compounds being selected from one or more salts claim 4 , or one or more oxides claim 4 , heteropolyacids claim 4 , organic acids claim 4 , sulphites claim 4 , sulfides claim 4 , sulfates claim 4 , phosphates claim 4 , pyrophosphates claim 4 , polyphosphates claim 4 , hydrates claim 4 , ...

Methods For Manufacturing Azoic Pigments

A method for manufacturing an azoic pigment is disclosed, according to an illustrative embodiment of the present invention. The method includes producing slurry of the azoic pigment. The slurry includes primary aromatic amine (PAA). The method further includes the derivatization of the residual PAA in the slurry, followed by encapsulation of the slurry. The slurry is acidified or basified. Finally, the slurry is further processed, thereby forming PAA migration free azoic pigment. The derivatization and encapsulation additively or synergistically reduce the PAA content thereby inhibiting migration of PAA from the pigment into a substrate onto which the pigment is loaded. 1. A method for manufacturing an azoic pigment , the method comprising the steps ofi) obtaining a slurry of an azoic pigment, the slurry including residual primary aromatic amine (PAA);ii) derivatization of the residual PAA in the slurry;iii) encapsulation of the slurry;iv) final processing of the slurry, the final processing including forming PAA migration free azoic pigment;wherein the derivatization and encapsulation synergistically reduce PAA content thereby inhibiting migration of PAA from the pigment to a surface in contact.2. The method of claim 1 , wherein the method optionally further comprises an acidification or basification of the slurry.3. The method of claim 1 , wherein the method optionally further comprises a method of working up the slurry claim 1 , the method comprising the steps of filtering and washing the pigment to obtain a pigment paste claim 1 , and reslurrying the pigment paste by adding an amount of solvent; stirring said dispersion in a temperature range comprised between 10° C. and 180° C.4. The method of claim 3 , wherein the working up of the slurry is performed prior to step ii).5. The method of claim 3 , wherein the working up of the slurry performed prior to step iii).6. The method of claim 2 , wherein the acidification/basification step is performed after step i) ...

A Coated Bismuth Oxy Halide-Based Pigment

The present invention is directed to a coated bismuth oxy halide-based pigment having a coating comprising an anti-oxidant, said antioxidant is being a phenol based, a phosphite or phosphonate based, or a thioether based stabilizer, and the coating comprising an inner coating and an outer coating, wherein the outer coating comprises the antioxidant, and wherein the inner coating comprises a first layer consisting of one or more salts, or one or more oxides, heteropolyacids, organic acids, sulphites, sulfides, sulfates, phosphates, pyrophosphates, polyphosphates, hydrates, carbonates, or a combination thereof, selected from the group of alkali-earth metals, metals, non-metals, transition metals or lanthanides. Further, the present invention is directed to a composition comprising a paint, a lacquer, an ink, a cosmetic, a resin, a plastisol or a polymer formulation, and such pigment. In addition, the present invention is directed to a method for manufacturing a coated bismuth oxy halide-based pigment, said method comprising the steps of:—providing a dispersion of a bismuth oxy halide-based pigment,—adding a dispersion of an antioxidant,—mixing and drying. 1. A coated bismuth oxy halide-based pigment having a coating comprising an antioxidant , said antioxidant being a phenol based , a phosphite or phosphonate based , or a thioether based stabilizer , and said coating comprising an inner coating and an outer coating , wherein the outer coating comprises the antioxidant , and wherein the inner coating comprises a first layer comprising one or more salts , or one or more oxides , heteropolyacids , organic acids , sulphites , sulfides , sulfates , phosphates , pyrophosphates , polyphosphates , hydrates , carbonates , or a combination thereof , selected from the group of alkali-earth metals , metals , non-metals , transition metals or lanthanides.2. The coated bismuth oxy halide-based pigment according to claim 1 , wherein the inner coating comprises a second layer ...

A coated bismuth oxy halide-based pigment

Method for manufacturing bismuth vanadate pigment having an improved alkaline resistance

The present invention is directed to a method for manufacturing a bismuth vanadate pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth vanadate pigment; ii) encapsulation of the bismuth vanadate pigment using a functionalized silane of the general formula R-Si(OR')3 wherein R is an alkyl group; and R' is a methyl or ethyl group; iii) final processing of the encapsulated pigment; and v) drying of the pigment. In addition, the present invention is directed to a bismuth vanadate pigment encapsulated with a functionalized silane of the general formula R-Si(OR')3 wherein R is an alkyl group; and R' is a methyl or ethyl group.

Methods for manufacturing azoic pigments

A method for manufacturing an azoic pigment is disclosed, according to an illustrative embodiment of the present invention. The method includes producing slurry of the azoic pigment. The slurry includes primary aromatic amine (PAA). The method further includes the derivatization of the residual PAA in the slurry, followed by encapsulation of the slurry. The slurry is acidified or basified. Finally, the slurry is further processed, thereby forming PAA migration free azoic pigment. The derivatization and encapsulation additively or synergistically reduce the PAA content thereby inhibiting migration of PAA from the pigment into a substrate onto which the pigment is loaded.

Method for manufacturing bismuth based pigment having an improved alkaline resistance by encapsulating said pigment with a chelating agent

The present invention is directed to a method for manufacturing a bismuth based pigment having an improved alkaline resistance, the method comprising: i) obtaining a dried bismuth based pigment; ii) encapsulation of the bismuth based pigment using a chelating agent; iii) final processing of the encapsulated pigment; and v) drying of the pigment. In addition, the present invention is directed to a bismuth based pigment encapsulated by a layer of chelating agent.

Método para la fabricación de pigmento de vanadato de bismuto que tiene una resistencia alcalina mejorada

La presente invención está dirigida a un método para fabricar un pigmento de vanadato de bismuto que tiene una resistencia alcalina mejorada, comprendiendo el método: i) obtener un pigmento de vanadato de bismuto seco; ii) encapsulación del pigmento vanadato de bismuto usando un silano funcionalizado de fórmula general R-Si(OR')3 en la que R es un grupo alquilo; y R' es un grupo metilo o etilo; iii) procesamiento final del pigmento encapsulado; y v) secado del pigmento. Además, la presente invención se dirige a un pigmento de vanadato de bismuto encapsulado con un silano funcionalizado de fórmula general R-Si(OR')3 en la que R es un grupo alquilo; y R' es un grupo metilo o etilo. (Traducción automática con Google Translate, sin valor legal)