Method of improving storage stability of pigments

Details Method of improving storage stability of pigments Method of improving storage stability of pigments

1992-08-11

1993-12-21

Group, Karl

Compositions: coating or plastic

Materials or ingredients

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

106437, 106450, 106481, 106499, C09B 6708

Patent

active

052717690

ABSTRACT:
A method of improving the storage stability of a coloured organic pigment in powder form which comprises coating pigment particles with a solid polymer which is a polar group-containing vinyl polymer, said polar group being a hydroxy, carboxyl, carboxylic ester, anhydride or carboxamide group, or a cellulosic polymer, thereby inhibiting reduction of tinting strength of the pigment on storage.

REFERENCES:
patent: 3904562 (1975-09-01), Hopfenberg et al.
patent: 4325862 (1982-04-01), Schuster
patent: 4417013 (1983-11-01), Schuster
patent: 4464203 (1984-08-01), Belde et al.
patent: 4808230 (1989-12-01), Bugnon et al.
patent: 4889562 (1989-12-01), Bugnon et al.
Derwent Abst. 87-299965/43, Oct. (1987).

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