Invention Grant
- Patent Title: Surface-reacted precipitated calcium carbonate, process to make same, and uses thereof
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Application No.: US12734992Application Date: 2008-12-02
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Publication No.: US10280309B2Publication Date: 2019-05-07
- Inventor: Daniel E. Gerard , Patrick A. C. Gane , Joachim Schölkopf , Hans-Joachim Weitzel
- Applicant: Daniel E. Gerard , Patrick A. C. Gane , Joachim Schölkopf , Hans-Joachim Weitzel
- Applicant Address: CH Oftringen
- Assignee: Omya International AG
- Current Assignee: Omya International AG
- Current Assignee Address: CH Oftringen
- Agency: Amster, Rothstein & Ebenstein LLP
- Priority: EP07123077 20071212
- International Application: PCT/EP2008/066631 WO 20081202
- International Announcement: WO2009/074492 WO 20090618
- Main IPC: C09C1/02
- IPC: C09C1/02 ; D21H17/69
Abstract:
The present invention relates to a process for the preparation of a surface-reacted precipitated calcium carbonate (PCC) pigment having an insoluble, at least partially crystalline calcium salt on its surface. In the process of the present invention, a PCC containing pigment is contacted with H3O+ ions and a solubilized anion in an aqueous medium in the presence of excess solubilized calcium ions to form the surface-reacted PCC having an insoluble, at least partially crystalline calcium salt of the anion formed on its surface.
Public/Granted literature
- US20100282127A1 SURFACE-REACTED PRECIPITATED CALCIUM CARBONATE, PROCESS TO MAKE SAME, AND USES THEREOF Public/Granted day:2010-11-11
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