Invention Grant
- Patent Title: Preparing and dispersing surface-modified colour pigments
- Patent Title (中): 制备和分散表面改性的彩色颜料
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Application No.: US13501281Application Date: 2010-10-20
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Publication No.: US08435341B2Publication Date: 2013-05-07
- Inventor: Geert Deroover
- Applicant: Geert Deroover
- Applicant Address: BE Mortsel
- Assignee: AGFA-Gevaert N.V.
- Current Assignee: AGFA-Gevaert N.V.
- Current Assignee Address: BE Mortsel
- Agency: Keating & Bennett, LLP
- Priority: EP09174938 20091103
- International Application: PCT/EP2010/065759 WO 20101020
- International Announcement: WO2011/054667 WO 20110512
- Main IPC: C09B67/20
- IPC: C09B67/20 ; C09B67/14 ; C09B67/22 ; C09B67/46
Abstract:
A method of preparing a pigment includes in order the steps of: a) providing a pigment containing a nucleophile group under basic conditions; b) reacting the pigment with 1,4-butane sultone or 1,3-propane sultone in an alkaline medium to form sulfobutyl groups respectively sulfopropyl groups on the pigment surface; and c) adding acid to convert the sulfobutyl groups or sulfopropyl groups to sulfonic acid groups. Pigments obtainable by the method and non aqueous pigment dispersions are also disclosed.
Public/Granted literature
- US20120199044A1 PREPARING AND DISPERSING SURFACE-MODIFIED COLOUR PIGMENTS Public/Granted day:2012-08-09
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