Grinding and/or dispersing agent containing polymers and/or copo

Details Grinding and/or dispersing agent containing polymers and/or copo Grinding and/or dispersing agent containing polymers and/or copo

1995-02-06

1996-10-29

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524556, C08K 300

Patent

active

055697020

ABSTRACT:
A grinding agent containing polymers and/or copolymers partially neutralized by magnesium, for aqueous suspensions of mineral substances to be used in pigmentary applications is disclosed.
A grinding agent composed of polymers and/or copolymers having a specific viscosity of between 0.3 and 0.8 and obtained by treatment, using one or several solvents, of a polymer and/or copolymer resulting from polymerization and/or copolymerization of acrylic and/or vinyl monomers comprising acid groups whose active acid sites are partially or completely neutralized to a degree of neutralization of 40 to 60%, including terminals, of the active acid sites using a neutralizing agent containing magnesium ions, and a degree of neutralization reaching 60% using a neutralizing agent containing sodium ions is disclosed.
A procedure for grinding in an aqueous suspension using said agent, as well as aqueous suspensions produced using said procedure and their applications to the fields of weight fillers, paper coating, paints, and plastics is also disclosed.

REFERENCES:
patent: 5145902 (1992-09-01), Ravet et al.
patent: 5278248 (1994-01-01), Egraz et al.
FR2650594 Published Feb. 8, 1991 (French Equivalent of U.S. Pat. 5,145,902) .

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