GB1017475A - Aqueous titanium dioxide suspensions - Google Patents
Aqueous titanium dioxide suspensionsInfo
- Publication number
- GB1017475A GB1017475A GB47018/63A GB4701863A GB1017475A GB 1017475 A GB1017475 A GB 1017475A GB 47018/63 A GB47018/63 A GB 47018/63A GB 4701863 A GB4701863 A GB 4701863A GB 1017475 A GB1017475 A GB 1017475A
- Authority
- GB
- United Kingdom
- Prior art keywords
- titanium dioxide
- alkali metal
- cellulose
- slurry
- dispersing agent
- 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.)
- Expired
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title abstract 14
- 239000004408 titanium dioxide Substances 0.000 title abstract 6
- 239000000725 suspension Substances 0.000 title abstract 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract 4
- 239000002002 slurry Substances 0.000 abstract 4
- 150000001340 alkali metals Chemical class 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 239000002270 dispersing agent Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 2
- 125000000129 anionic group Chemical group 0.000 abstract 2
- 239000007900 aqueous suspension Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 229920000058 polyacrylate Polymers 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 229920003169 water-soluble polymer Polymers 0.000 abstract 2
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical class O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 abstract 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052684 Cerium Inorganic materials 0.000 abstract 1
- 229920000896 Ethulose Polymers 0.000 abstract 1
- 239000001859 Ethyl hydroxyethyl cellulose Substances 0.000 abstract 1
- 239000001828 Gelatine Chemical class 0.000 abstract 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- 229920001732 Lignosulfonate Polymers 0.000 abstract 1
- 239000004117 Lignosulphonate Substances 0.000 abstract 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229920002472 Starch Chemical class 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 abstract 1
- 229940072056 alginate Drugs 0.000 abstract 1
- 235000010443 alginic acid Nutrition 0.000 abstract 1
- 229920000615 alginic acid Polymers 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 229910000318 alkali metal phosphate Inorganic materials 0.000 abstract 1
- -1 alkali metal salt Chemical class 0.000 abstract 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 239000000908 ammonium hydroxide Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract 1
- 239000005018 casein Chemical class 0.000 abstract 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical class NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 abstract 1
- 235000021240 caseins Nutrition 0.000 abstract 1
- 239000001913 cellulose Chemical class 0.000 abstract 1
- 229920002678 cellulose Chemical class 0.000 abstract 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 235000019326 ethyl hydroxyethyl cellulose Nutrition 0.000 abstract 1
- 229920003089 ethylhydroxy ethyl cellulose Polymers 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Substances O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 1
- 229920000159 gelatin Chemical class 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 239000003292 glue Chemical class 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 abstract 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 abstract 1
- 235000019357 lignosulphonate Nutrition 0.000 abstract 1
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical class CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229920000609 methyl cellulose Polymers 0.000 abstract 1
- 239000001923 methylcellulose Substances 0.000 abstract 1
- 235000010981 methylcellulose Nutrition 0.000 abstract 1
- 244000005700 microbiome Species 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 229920005615 natural polymer Polymers 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 229920000515 polycarbonate Polymers 0.000 abstract 1
- 239000004417 polycarbonate Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 abstract 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 abstract 1
- 235000019698 starch Nutrition 0.000 abstract 1
- 239000008107 starch Chemical class 0.000 abstract 1
- 229920001059 synthetic polymer Polymers 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3692—Combinations of treatments provided for in groups C09C1/3615 - C09C1/3684
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
- C09C3/041—Grinding
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
An aqueous suspension of pigmentary titanium dioxide is produced by miling raw titanium dioxide, forming an aqueous slurry of the milled material, subjecting the material, if desired, to a wet coating process, adjusting the solids content of the slurry to between 30% and 90%, preferably between 40% and 70%, by weight and adding a minor proportion of a water-soluble natural or synthetic polymer. The raw titanium dioxide, for example rutile or anatase obtained from the initial manufacturing process and prior to development of the pigmentary properties, is preferably subjected to sand milling in the form of an aqueous slurry, for example by agitating the slurry with a grinding medium having a mean particle size of from 300 to 1000, preferably of from 500 to 900, microns. The milled titanium dioxide may be wet coated with hydrous oxides of titanium, aluminium, silicon, zirconium and/or cerium, and/or with a phosphate. The water-soluble polymer may be an alkali metal or ammonium polyacrylate or polyvinylalcoholate, or alginate, glue, casein, starch or gelatine, or a cellulose derivative, for example a sodium carboxymethyl cellulose, a methyl cellulose, an ethyl hydroxy- or ethyl hydroxyethyl-cellulose or a hydroxypropyl cellulose. To inhibit attack by micro-organisms a phenyl mercuric compound, an alkali metal phenate, chlorophenate or phenylphenate or a chlorinated metacresol may also be added. An anionic dispersing agent, for example an alkali metal phosphate or silicate, sodium or ammonium polyacrylate or polycarbonate, or an alkali metal salt of a napththalene-formaldehyde condensate or lignosulphonate, may also be added, preferably after a washing step which follows the coating step but prior to the formation of the final suspension by adjustment of the solids content; to enhance the action of the dispersing agent, where this is present, a small amount of alkali, for example alkali metal or ammonium hydroxide, may also be added. Preferred amounts of coating materials, water-soluble polymer and anionic dispersing agent, based on the titanium dioxide content of the suspension, are given in the Specification together with numerous examples describing the preparation of such sedimentation-resisting aqueous suspensions.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB47018/63A GB1017475A (en) | 1963-11-28 | 1963-11-28 | Aqueous titanium dioxide suspensions |
| FR993273A FR1413458A (en) | 1963-11-28 | 1964-10-30 | Improved aqueous titanium dioxide pigment suspensions |
| NL6413129A NL6413129A (en) | 1963-11-28 | 1964-11-11 | |
| BE656373A BE656373A (en) | 1963-11-28 | 1964-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB47018/63A GB1017475A (en) | 1963-11-28 | 1963-11-28 | Aqueous titanium dioxide suspensions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1017475A true GB1017475A (en) | 1966-01-19 |
Family
ID=10443412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB47018/63A Expired GB1017475A (en) | 1963-11-28 | 1963-11-28 | Aqueous titanium dioxide suspensions |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE656373A (en) |
| GB (1) | GB1017475A (en) |
| NL (1) | NL6413129A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536510A (en) * | 1967-11-20 | 1970-10-27 | Du Pont | High solids tio2 slurry |
| DE3028332A1 (en) * | 1979-07-27 | 1981-02-19 | Canadian Titanium Pigments | METHOD FOR PRODUCING A SLURRY OF RUTILE TITANIUM DIOXIDE |
| GB2226018A (en) * | 1988-12-16 | 1990-06-20 | Tioxide Group Plc | Titanium dioxide dispersions |
| EP0748362B2 (en) † | 1994-02-28 | 2001-04-18 | E.I. Du Pont De Nemours And Company | PROCESS FOR PREPARING SILANIZED TiO 2 PIGMENTS USING A MEDIA MILL |
| EP2963089A1 (en) * | 2014-07-02 | 2016-01-06 | United Technologies Corporation | Chemical synthesis of hybrid inorganic-organic nanostructured corrosion inhibitive pigments |
| CN110964346A (en) * | 2019-11-18 | 2020-04-07 | 中信钛业股份有限公司 | Preparation method of universal titanium dioxide water slurry |
| CN113831763A (en) * | 2021-11-01 | 2021-12-24 | 河南佰利联新材料有限公司 | Preparation method of high-dispersity titanium white slurry suspension |
| CN114806225A (en) * | 2022-03-28 | 2022-07-29 | 浙江恒逸石化研究院有限公司 | Preparation method of liquid titanium dioxide |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1560944A (en) * | 1975-12-23 | 1980-02-13 | Laporte Industries Ltd | Slurries of titanium dioxide |
-
1963
- 1963-11-28 GB GB47018/63A patent/GB1017475A/en not_active Expired
-
1964
- 1964-11-11 NL NL6413129A patent/NL6413129A/xx unknown
- 1964-11-27 BE BE656373A patent/BE656373A/xx unknown
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3536510A (en) * | 1967-11-20 | 1970-10-27 | Du Pont | High solids tio2 slurry |
| DE3028332A1 (en) * | 1979-07-27 | 1981-02-19 | Canadian Titanium Pigments | METHOD FOR PRODUCING A SLURRY OF RUTILE TITANIUM DIOXIDE |
| GB2226018A (en) * | 1988-12-16 | 1990-06-20 | Tioxide Group Plc | Titanium dioxide dispersions |
| US5068056A (en) * | 1988-12-16 | 1991-11-26 | Tioxide Group Plc | Aqueous dispersions of acicular titanium dioxide |
| GB2226018B (en) * | 1988-12-16 | 1992-08-05 | Tioxide Group Plc | Dispersions |
| EP0748362B2 (en) † | 1994-02-28 | 2001-04-18 | E.I. Du Pont De Nemours And Company | PROCESS FOR PREPARING SILANIZED TiO 2 PIGMENTS USING A MEDIA MILL |
| EP2963089A1 (en) * | 2014-07-02 | 2016-01-06 | United Technologies Corporation | Chemical synthesis of hybrid inorganic-organic nanostructured corrosion inhibitive pigments |
| US10323185B2 (en) | 2014-07-02 | 2019-06-18 | United Technologies Corporation | Chemical synthesis of hybrid inorganic-organic nanostructured corrosion inhibitive pigments and methods |
| US11845891B2 (en) | 2014-07-02 | 2023-12-19 | Rtx Corporation | Chemical synthesis of hybrid inorganic-organic nanostructured corrosion inhibitive pigments and methods |
| CN110964346A (en) * | 2019-11-18 | 2020-04-07 | 中信钛业股份有限公司 | Preparation method of universal titanium dioxide water slurry |
| CN110964346B (en) * | 2019-11-18 | 2021-09-14 | 中信钛业股份有限公司 | Preparation method of universal titanium dioxide water slurry |
| CN113831763A (en) * | 2021-11-01 | 2021-12-24 | 河南佰利联新材料有限公司 | Preparation method of high-dispersity titanium white slurry suspension |
| CN114806225A (en) * | 2022-03-28 | 2022-07-29 | 浙江恒逸石化研究院有限公司 | Preparation method of liquid titanium dioxide |
| CN114806225B (en) * | 2022-03-28 | 2023-08-29 | 浙江恒逸石化研究院有限公司 | Preparation method of liquid titanium dioxide |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6413129A (en) | 1965-05-31 |
| BE656373A (en) | 1965-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3513007A (en) | Mixed coating process | |
| US3758322A (en) | Rutile tio2 slurries | |
| US5730795A (en) | Process for manufacturing titanium dioxide pigment having a hydrous oxide coating using a media mill | |
| RU2052479C1 (en) | Method of producing titanium dioxide slime pigment | |
| US4052223A (en) | Treatment of pigment | |
| EP0078633A1 (en) | Pigments and their preparation | |
| JPH0212503B2 (en) | ||
| CA1319491C (en) | Process for preparation of an acid resistant coating on filler particles | |
| GB1017475A (en) | Aqueous titanium dioxide suspensions | |
| US4818294A (en) | Kaolinite aggregation using organo-silicon compounds | |
| US3804655A (en) | Pigments | |
| JPS6223989B2 (en) | ||
| US5755870A (en) | Composite aggregate pigments for the coating industry | |
| US5028268A (en) | Method for improving the rheology of calcined kaolin clay products | |
| US5089056A (en) | Opacifying kaolin pigments and process for making same by reacting with sodium hydroxide in water | |
| US4170485A (en) | Titanium dioxide slurries from recycle material | |
| US3503772A (en) | Sio2-zno treated tio2 pigments for paper laminates | |
| JPS6149250B2 (en) | ||
| US5312485A (en) | Precipitated encapsulated paper pigments and methods | |
| US5232495A (en) | Method of producing aggregated kaolinite pigment using organic silicon compounds | |
| GB2268171A (en) | Coated composite pigmentary material | |
| JPH02194065A (en) | Minute titanium dioxide composition | |
| GB1025960A (en) | Coated titanium dioxide pigments | |
| US2457797A (en) | Process for the preparation of apigment complex, including a reacted starch | |
| US3658566A (en) | Titanium oxide pigments |