Highly concentrated aqueous suspension of minerals and/or filler

Details Highly concentrated aqueous suspension of minerals and/or filler Highly concentrated aqueous suspension of minerals and/or filler

1990-06-06

1991-12-31

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106429, 106447, 106960, 106971, 106487, 106499, 2523635, 252351, 252354, 252355, 252356, 252357, 210710, 210725, 210734, 210735, C09C 310

Patent

active

050768468

ABSTRACT:
An aqueous suspension of minerals and/or fillers and/or pigments having a solid content .gtoreq.60% by weight, the mineral or the filler or the pigment being dispersed with one or more dispersing agents, is characterized in that the dispersing agent contains one or more amphoteric polyelectrolytes and/or cationic polyelectrolytes and/or amphoteric cationoic polyelectrolytes and/or amphoteric anionic polyelectrolytes and/or partially neutralized anionic polyelectrolytes and/or partially neutralized amphoteric anionic polyelectrolytes, the filler and/or pigment and/or mineral particles carrying a charge neutral or positive to the outside.
Furthermore is disclosed a process characterized in that a part of the polyelectrolytes according to the invention is added before the grinding, a part thereof may be added during the grinding and a part thereof may be added after the grinding. According to the invention grinding and dispersing is achieved in only one process step.

REFERENCES:
patent: 4305860 (1981-12-01), Iovine et al.
patent: 4455240 (1984-06-01), Costello
patent: 4510059 (1985-04-01), Amjad et al.
patent: 4610801 (1986-09-01), Matthews et al.
patent: 4687592 (1987-08-01), Collins et al.
patent: 4711727 (1987-12-01), Matthews et al.
patent: 4841040 (1989-06-01), Just et al.

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