Process for improving storage stability of pigments

Details Process for improving storage stability of pigments Process for improving storage stability of pigments

1992-08-11

1994-02-01

Group, Karl

Compositions: coating or plastic

Materials or ingredients

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

106450, 106481, 106499, C09C 136

Patent

active

052828972

ABSTRACT:
A process for improving the storage stability of a colored organic pigment in powder form which comprises coating pigment particles with a partially or completely hydrolysed compound of an element of Group IVA or Group IVB of the Periodic Table in its IV oxidation state, thereby inhibiting reduction of the tinting strength of the pigment on storage.

REFERENCES:
patent: 4880472 (1989-11-01), Bugnon et al.
patent: 4889562 (1989-12-01), Bugnon et al.
patent: 5017231 (1991-05-01), Nishihara et al.
Derw. Abst. 73-765530.
Derw. Abst. 87-299965.

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