Invention Grant
- Patent Title: Process for preparing self-dispersing pigments
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Application No.: US14441243Application Date: 2013-10-24
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Publication No.: US09701842B2Publication Date: 2017-07-11
- Inventor: Franck Andre Vanhecke , Mitchell Scott Chinn
- Applicant: CHEMOURS COMPANY TT LLC
- Applicant Address: US PA Harrisburg
- Assignee: THE CHEMOURS COMPANY TT, LLC
- Current Assignee: THE CHEMOURS COMPANY TT, LLC
- Current Assignee Address: US PA Harrisburg
- International Application: PCT/US2013/066484 WO 20131024
- International Announcement: WO2014/078040 WO 20140522
- Main IPC: C09C1/36
- IPC: C09C1/36 ; C09C1/16 ; D21H17/68 ; D21H17/69 ; D21H17/67 ; C09C1/40 ; C09C3/00 ; C09C3/06 ; C09C3/08 ; C09C1/02 ; C09C1/04 ; D21H27/26 ; D21H27/30 ; D21H19/38

Abstract:
The disclosure provides a process for preparing a self-dispersing pigment having an isoelectric point of at least about 8 comprising: (a) adding a dual functional compound with an acidic aluminum salt to form an aqueous solution, wherein the dual functional compound comprises an anchoring group that attaches the dual-functional compound to the pigment surface, and a basic amine group comprising a primary, secondary or tertiary amine; (b) adding a base to the mixture from step (a) whereby the pH is raised to about 4 to about 9 to form a turbid solution; and (c) adding the mixture from step (b) to a slurry of inorganic particles whereby a hydrous alumina and the dual functional compound are deposited on the pigment surface. The self-dispersing pigments prepared by this process are useful in making décor paper that may be used in paper laminates.
Public/Granted literature
- US20150337138A1 PROCESS FOR PREPARING SELF-DISPERSING PIGMENTS Public/Granted day:2015-11-26
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