CA2480959A1 - Process for the preparation of coated finely divided inorganic solids and their use - Google Patents

Process for the preparation of coated finely divided inorganic solids and their use Download PDF

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Publication number
CA2480959A1
CA2480959A1 CA002480959A CA2480959A CA2480959A1 CA 2480959 A1 CA2480959 A1 CA 2480959A1 CA 002480959 A CA002480959 A CA 002480959A CA 2480959 A CA2480959 A CA 2480959A CA 2480959 A1 CA2480959 A1 CA 2480959A1
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CA
Canada
Prior art keywords
organic
finely divided
process according
coated
divided inorganic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002480959A
Other languages
French (fr)
Other versions
CA2480959C (en
Inventor
Djamschid Amirzadeh-Asl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Venator Germany GmbH
Original Assignee
Sachtleben Chemie GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sachtleben Chemie GmbH filed Critical Sachtleben Chemie GmbH
Priority to CA2480959A priority Critical patent/CA2480959C/en
Publication of CA2480959A1 publication Critical patent/CA2480959A1/en
Application granted granted Critical
Publication of CA2480959C publication Critical patent/CA2480959C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/30—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using agents to prevent the granules sticking together; Rendering particulate materials free flowing in general, e.g. making them hydrophobic

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Medicinal Preparation (AREA)
  • Cosmetics (AREA)

Abstract

A process for the preparation of coated finely divided inorganic solids is described, in which the surface of finely divided inorganic solids particles is coated with at least two different organic additives, at least one additive comprising a wetting agent, dispersing agent or deflocculating agent and the proportion of additives being not more than 15 wt.% of the coated solids.

Claims (14)

1. Process for the preparation of coated finely divided inorganic solids, characterised in that the surface of finely divided inorganic solids particles is coated with at least two different organic additives, at least one additive comprising a wetting agent, dispersing agent or deflocculating agent and the proportion of additives being not more than 15 wt.%
of the coated solids, the finely divided inorganic solids being in the foam of an aqueous suspension or in the form of a filter cake (paste-like or in dough form} and the two different organic additives being added to the finely divided inorganic solids separately or in the form of a mixture, the resulting suspension being dried and the coated finely divided inorganic solids having a mean particle size d50 of from 0.001 to 20 µm.
2. Process according to claim 1, characterised in that the finely divided inorganic solids are in the form of a powder instead of in the form of a suspension or filter cake and are mixed with the two different organic additives in a mixer and the mixture is then ground.
3. Process according to claim 1 or 2, characterised in that the proportion of additives is not more than wt.% of the coated solids.
4. Process according to any one of claims 1 to 3, characterised in that the proportion of additives is not more than 5 wt.% of the coated solids.
5. Process according to any one of claims 1 to 4, characterised in that there are used as the finely divided inorganic solids, separately or in the form of a mixture, titanium dioxide, barium sulfate, lithopone, zinc sulfide, zinc oxide, calcium carbonate, calcium sulfate, iron oxide, silicon dioxide, talcum, kaolin, mica, aluminium oxide, aluminium hydroxide, metal titanates, coloured titanates (e.g. chrome nickel titanates), zirconium oxide, magnesium oxide, hydrotalcite, chalk, mixed-phase pigments, anticorrosive pigments, inorganic flameproofing pigments, black pigments (e.g. iron oxide black), inorganic special-effect pigments, or metal nitrides, carbides and borides.
6. Process according to any one of claims 1 to 5, characterised in that the wetting, dispersing or deflocculating agent comprises one or more of the following substances: alkali metal salts or ammonium salts of organic acids (e.g. salts of poly(meth)acrylic acid), alkali metal salts of acrylate or methacrylate copolymers, polyphosphates (inorganic or organic polyphosphates, e.g.
poly(meth)acrylate phosphates), generally poly(meth)acrylates, polyethers, anionically modified polyethers, fatty alcohol polyglycol ethers, modified polyurethanes or anionically active aliphatic esters.
7. Process according to any one of claims 1 to 6, characterised in that the added amount of wetting, dispersing or deflocculating agent is from 0.001 to wt.%, based or the finished coated product.
8. Process according to claim 7, characterised in that the added amount of wetting, dispersing or deflocculating agent is from 0.001 to 5 wt. %, based on the finished coated product.
9. Process according to any one of claims 1 to 8, characterised in that the second organic additive comprises one or more of the following substances:
carboxylic acids, soaps, metal soaps, alcohols (e. g.
1,1,1-trimethylolpropane), pentaerythritol, neopentyl glycol, polyglycols (e.g, polyethylene glycol), polyethylene glycol ethers, organic esters (e.g, neopentyl glycol dibenzoate), silanes, siloxanes, silicone oils, organic sulfones of the formula RSO2R, organic ketones (R-(C=O)-R), organic nitriles (RCN), organic sulfoxides (R2-SO2), organic amides (R-(C=O)-NR'R or R-(S=O)-ONR'R), fatty acid esters or fatty acid amides.
10. Process according to any one of claims 1 to 9, characterised in that the added amount of the second organic additive is from 0.01 to 10 wt.%, based on the finished coated product.
11. Process according to claim 10, characterised in that the added amount of the second organic additive is from 0.01 to 5 wt.%, based or the finished coated product.
12. Process according to any one of claims 1 to 11, characterised in that the coated finely divided inorganic solids have a mean particle size d50 of from 0.005 to 5 µm.
13. Use of the coated finely divided inorganic solids prepared by a process according to any one of claims 1 to 12 as an additive in plastics, in the preparation of polymers, in surface coatings and paints/inks, in paper production, in ceramics, medical and cosmetic products.
14. Use according to claim 13, characterised in that the coated finely divided inorganic solids are dispersed in water or as organic solvent, an antifoam being added in an added amount of up to 3 wt.%, based on the solids content of the suspension.
CA2480959A 2004-09-08 2004-09-08 Process for the preparation of coated finely divided inorganic solids and their use Expired - Fee Related CA2480959C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2480959A CA2480959C (en) 2004-09-08 2004-09-08 Process for the preparation of coated finely divided inorganic solids and their use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2480959A CA2480959C (en) 2004-09-08 2004-09-08 Process for the preparation of coated finely divided inorganic solids and their use

Publications (2)

Publication Number Publication Date
CA2480959A1 true CA2480959A1 (en) 2006-03-08
CA2480959C CA2480959C (en) 2012-01-03

Family

ID=36035862

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2480959A Expired - Fee Related CA2480959C (en) 2004-09-08 2004-09-08 Process for the preparation of coated finely divided inorganic solids and their use

Country Status (1)

Country Link
CA (1) CA2480959C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114854249A (en) * 2022-03-25 2022-08-05 广东欧文莱陶瓷有限公司 Metal ink for rock plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114854249A (en) * 2022-03-25 2022-08-05 广东欧文莱陶瓷有限公司 Metal ink for rock plate
CN114854249B (en) * 2022-03-25 2023-02-10 广东欧文莱陶瓷有限公司 Metal ink for rock plate

Also Published As

Publication number Publication date
CA2480959C (en) 2012-01-03

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Effective date: 20190909