Mineral pigment containing calcium carbonate, an aqueous suspension containing it and uses thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09C-001/02
C04B-014/00
C04B-014/04
D21H-017/67
B41M-005/00
D21H-019/38
B41M-005/52
출원번호
US-0464933
(2017-03-21)
등록번호
US-9862830
(2018-01-09)
우선권정보
FR-03 03281 (2003-03-18)
발명자
/ 주소
Gane, Patrick
Buri, Matthias
Blum, René Vinzenz
출원인 / 주소
Omya International AG
대리인 / 주소
Amster, Rothstein & Ebenstein LLP
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
The present invention concerns the technical sector of mineral pigments containing a product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the said carbonate with one or more moderately strong to strong H3O+ion donors and th
The present invention concerns the technical sector of mineral pigments containing a product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the said carbonate with one or more moderately strong to strong H3O+ion donors and the reaction product or products of the said carbonate with gaseous CO2 formed in situ and/or coming from an external supply, and at least one aluminium silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt such as sodium silicate and/or potassium silicate and/or lithium silicate, and/or at least one aluminium hydroxide and/or at least one sodium and/or potassium aluminate, containing less than 0.1% by weight silicate of a monovalent salt such as sodium, potassium or lithium silicate or mixtures thereof, relative to the dry weight of calcium carbonate, having a pH greater than 7.5 measured at 20° C., and their uses in papermaking applications such as mass filling and/or the coating of paper and more particularly of printing paper, in particular for offset printing, or digital printing such as inkjet and/or laser printing.
대표청구항▼
1. A process comprising the steps of: (a) treating a natural ground calcium carbonate-containing mineral pigment, that is dispersed with a dispersing agent, in an aqueous suspension for 0.2 to 24 hours with: (i) phosphoric acid at a molar quantity, relative to the number of moles of calcium carbonat
1. A process comprising the steps of: (a) treating a natural ground calcium carbonate-containing mineral pigment, that is dispersed with a dispersing agent, in an aqueous suspension for 0.2 to 24 hours with: (i) phosphoric acid at a molar quantity, relative to the number of moles of calcium carbonate, of 0.05 to 1,(ii) gaseous CO2 formed in situ and/or coming from an external supply, and(iii) 0.1 to 25% by dry weight, relative to the dry weight of calcium carbonate, of one or more of aluminium silicate, synthetic silica, calcium silicate, silicate of a monovalent salt, sodium aluminate and potassium aluminate,to obtain an aqueous suspension of mineral pigment having a pH of greater than 7.5 measured at 20° C. between one hour and twenty-four hours after treatment,wherein addition of the one or more of aluminium silicate, synthetic silica, calcium silicate, silicate of a monovalent salt, sodium aluminate and potassium aluminate to the aqueous suspension occurs before, during or after reaction of the surface of the natural ground calcium carbonate with the phosphoric acid;(b) optionally adjusting the pH of the aqueous suspension of mineral pigment obtained in step (a) 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). 2. The process according to claim 1, wherein in step (a) the mineral pigment is treated for 0.2 to 6 hours. 3. The process according to claim 1, wherein the mineral pigment 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. 4. The process according to claim 1, wherein the mineral pigment is treated in part (iii) with 5 to 10% by dry weight, relative to the dry weight of calcium carbonate, of one or more of aluminium silicate, synthetic silica, calcium silicate, silicate of a monovalent salt, sodium aluminate and potassium aluminate. 5. The process according to claim 1, wherein in step (a) the mineral pigment is treated at temperature of between 5° C. and 100° C. 6. The process according to claim 1, wherein in step (a) the mineral pigment is treated at temperature of between 65° C. and 90° C. 7. The process according to claim 1, wherein the mineral pigment is treated in part (iii) with a silicate of monovalent salt. 8. The process according to claim 1, wherein the silicate of monovalent salt is sodium silicate, potassium silicate, lithium silicate, and any mixture thereof. 9. The process according to claim 1, wherein the silicate of monovalent salt is sodium silicate. 10. The process according to claim 1, wherein the natural ground calcium carbonate-containing mineral pigment is treated with 0.1 to 25% by dry weight, relative to the dry weight of calcium carbonate, of aluminum silicate. 11. The process according to claim 1, wherein the mineral pigment is a mixture of natural ground calcium carbonate with one or more of talc, kaolin, titanium dioxide, or magnesium oxide. 12. The process according to claim 1, wherein the natural ground calcium carbonate is obtained from ground marble, calcite, chalk, dolomite or any mixture thereof. 13. The process according to claim 1, wherein the mineral pigment has a BET specific surface area of 25 m2/g to 200 m2/g. 14. The process according to claim 1, wherein the mineral pigment has a BET specific surface area of 30 m2/g to 80 m2/g. 15. The process according to claim 1, wherein the mineral pigment has a BET specific surface area of 35 m2/g to 60 m2/g. 16. The process according to claim 1, wherein the mineral pigment has a median diameter of 0.1 to 50 micrometers. 17. The process according to claim 1, wherein the mineral pigment has a median diameter of 0.5 to 40 micrometers. 18. The process according to claim 1, wherein the mineral pigment has a median diameter of 1 to 10 micrometers. 19. The process according to claim 1, wherein step (b) is performed. 20. The process according to claim 1, wherein step (c) is performed. 21. The process according to claim 1, wherein step (d) is performed. 22. The process according to claim 1, wherein the dispersing agent in step (a) is sodium polyacrylate.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (11)
Passaretti June D. (Liberty Corner NJ), Acid-stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper.
Passaretti June D. (Liberty Corner NJ), Acid-stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper.
Chapnerkar Vasant D. (Tampa FL) Lasmarias Vicente B. (Tacoma WA) Mathur Vijay K. (Federal Way WA), Method for preparing acid resistant calcium carbonate pigments.
Snowden Kevin J. ; Wu Kuan-Ting,TWX ; Rodriguez Jose M., Stabilized calcium carbonate composition using sodium silicate and one or more weak acids or alum and uses therefor.
Gane, Patrick Arthur Charles; Gisella, Uwe; Laufmann, Maximilian; Ridgway, Catherine Jean, Use of a surface-reacted calcium carbonate in tissue paper, process to prepare a tissue paper product of improved softness, and resulting improved softness tissue paper products.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.