# US 10,308,813 B2 · Dry mineral pigment containing calcium carbonate, aqueous suspension containing said pigment, and the uses thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,308,813 B2 - Document ID: US10308813B2 - Status: Granted - Kind: B2 - Application number: 11/597,703 - Filed: 2005-06-08 - Published: 2008-01-31 - Granted: 2019-06-04 - Earliest claimed: 2004-06-11 - Assignees: Omya International AG - Applicants: Matthias Buri; Rene Burkhalter; Peter Haldemann - Inventors: Matthias Buri; Rene Burkhalter; Peter Haldemann - Web page: https://patentgrep.com/patent/US10308813B2 ## CPC - C09C 1/021: {Calcium carbonates} - C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer - C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer - C01P 2006/12: Surface area - C01P 2006/22: Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS ## Abstract The invention concerns a process for manufacturing a dry mineral pigment containing a product formed in situ by the multiple reaction between a calcium carbonate and the product or products of reaction of the said carbonate with one or more moderately strong to strong H3O+ ion donators and the product or products of reaction of the said carbonate with gaseous CO2 formed in situ and/or originating from an external supply and one or more compounds of formula R—X together with the mineral pigment obtained by the process, and its applications in the field of paint and/or plastics. ## Claims ### Claim 1 A product obtained by a process consisting of the steps of: (a) treating calcium carbonate, that is dispersed with a dispersing agent, in an aqueous suspension for 0.2 to 10 hours with the following consisting of: (i) phosphoric acid at a molar quantity, relative to the number of moles of calcium carbonate, of 0.001 to 1, (ii) gaseous CO2 formed in situ and/or coming from an external supply, and (iii) one or more compounds of formula R—X at a molar quantity, relative to the number of moles of calcium carbonate, of 0.001 to 1, wherein the one or more compounds of formula R—X have 8 to 24 carbon atoms and are selected from the group consisting of linear fatty acids, ramified fatty acids, fatty amines, fatty alcohols, whether or not saturated, mixtures thereof, and their mixtures with synthetic or natural fatty compounds, to obtain an aqueous suspension of mineral pigment; (b) optionally adjusting the pH of the aqueous suspension of mineral pigment by the addition of a base; (c) optionally introducing at least one anionic or cationic electrolyte to the aqueous suspension of mineral pigment; and (d) optionally drying the aqueous suspension of mineral pigment obtained from step (a), step (b) and/or step (c), wherein the calcium carbonate in step (a) is selected from the group consisting of ground marble, calcite, chalk, dolomite and any mixture thereof. ### Claim 2 (depends on 1) The product according to claim 1, wherein in step (a) the calcium carbonate is treated for 0.2 to 6 hours. ### Claim 3 (depends on 1) The product according to claim 1, wherein the calcium carbonate is treated in part (i) with phosphoric acid at a molar quantity, relative to the number of moles of calcium carbonate, of 0.1 to 0.5. ### Claim 4 (depends on 1) The product according to claim 1, wherein in step (a) the calcium carbonate is treated at temperature of between 5° C. and 100° C. ### Claim 5 (depends on 1) The product according to claim 1, wherein in step (a) the calcium carbonate is treated at temperature of between 65° C. and 80° C. ### Claim 6 (depends on 1) The product according to claim 1, wherein the calcium carbonate is treated in part (iii) with one or more compounds of formula R—X at a molar quantity, relative to the number of moles of calcium carbonate, of 0.002 to 0.01. ### Claim 7 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a fatty acid. ### Claim 8 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a fatty amine. ### Claim 9 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a fatty alcohol. ### Claim 10 (depends on 1) The product according to claim 1, wherein the fatty acids, fatty amines, fatty alcohols and their mixtures are of the stearic, oleic, linoleic, myristic, or octylic type, or their mixtures. ### Claim 11 (depends on 1) The product according to claim 1, wherein the fatty acids, fatty amines, fatty alcohols, and their mixtures have 16 to 18 carbon atoms. ### Claim 12 (depends on 1) The product according to claim 1, wherein the natural fatty compound is of animal origin. ### Claim 13 (depends on 1) The product according to claim 1, wherein the natural fatty compound is of vegetal origin. ### Claim 14 (depends on 1) The product according to claim 1, wherein the natural fatty compound is tallow oil. ### Claim 15 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is stearic acid. ### Claim 16 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of stearic acid and a fatty acid. ### Claim 17 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of palmitic acid and stearic acid. ### Claim 18 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of a fatty acid and a fatty alcohol. ### Claim 19 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of a vegetal oil-based fatty acid and stearilic acid. ### Claim 20 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of a vegetal oil-based fatty acid and dodecylic alcohol. ### Claim 21 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is stearilic alcohol. ### Claim 22 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is lauric acid or laurylic acid. ### Claim 23 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is a mixture of fatty acids. ### Claim 24 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is sunflower oil. ### Claim 25 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is linseed oil. ### Claim 26 (depends on 1) The product according to claim 1, wherein the one or more compounds of formula R—X is coco oil. ### Claim 27 (depends on 1) The product according to claim 1, wherein the mineral pigment has a BET specific surface area of 1 m2/g to 200 m2/g. ### Claim 28 (depends on 1) The product according to claim 1, wherein the mineral pigment has a BET specific surface area of 5 m2/g to 80 m2/g. ### Claim 29 (depends on 1) The product according to claim 1, wherein the mineral pigment has a BET specific surface area of 20 m2/g to 60 m2/g. ### Claim 30 (depends on 1) The product according to claim 1, wherein the mineral pigment has a median diameter of 0.1 to 50 micrometers. ### Claim 31 (depends on 1) The product according to claim 1, wherein the mineral pigment has a median diameter of 1 to 10 micrometers. ### Claim 32 (depends on 1) The product according to claim 1, having a moisture content of less than 1.50% after drying for 2 hours at 120° C. in an oven at atmospheric pressure. ### Claim 33 (depends on 1) The product according to claim 1, wherein step (b) is performed. ### Claim 34 (depends on 1) The product according to claim 1, wherein step (c) is performed. ### Claim 35 (depends on 1) The product according to claim 1, wherein step (d) is performed. ### Claim 36 (depends on 1) The product according to claim 1, wherein steps (b) and (c) are performed. ### Claim 37 (depends on 1) The product according to claim 1, wherein steps (c) and (d) are performed. ### Claim 38 (depends on 1) The product according to claim 1, wherein steps (b) and (d) are performed. ### Claim 39 (depends on 1) The product according to claim 1, wherein steps (b), (c) and (d) are performed.