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1. (WO1997006785) SURFACE-MODIFIED POWDERS

Pub. No.:    WO/1997/006785    International Application No.:    PCT/IL1996/000062
Publication Date: Feb 27, 1997 International Filing Date: Jul 24, 1996
IPC: C08F 292/00
C09C 1/02
C09C 1/28
C09C 3/08
D21H 17/67
D21H 17/69
D21H 21/52
Applicants: BARAN ADVANCED MATERIALS (94) LTD.
YANIV, Isaac
Inventors: YANIV, Isaac
Title: SURFACE-MODIFIED POWDERS
Abstract:
A process for the preparation of surface modified minerals essentially consisting of water insoluble or sparingly soluble natural and/or artificial mineral powders based on Ca and/or Mg, the said powder particles being coated with water-soluble salts of bivalent and/or trivalent metal cations (of which concentrations are: > 100ppm for CaCO3 and > 500ppm for other minerals, based on the aqueous solutions) at a controlled pH in the range between 5.5 and 12.5 or, if the natural PZC of the specific minerals is lower than 5.5, at a pH between the PZC and 12.5.