Colored nacreous pigment and a method for its preparation

Details Colored nacreous pigment and a method for its preparation Colored nacreous pigment and a method for its preparation

1989-01-18

1991-10-29

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

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

427218, 427337, 428363, 428404, 106DIG3, C04B 1420

Patent

active

050613170

ABSTRACT:
The invention relates to a new nacreous pigment which contains a dye or a color pigment and is based on metal-oxide-coated mica particles or other layer silicate particles, and to a method for preparing it. The pigment particles consist of metal-oxide-coated, porous silica skeletons of mica particles or of other silicate particles, containing few or no cations and having at least one dye or color pigment attached to them. In the method, a) a preliminary-stage product is prepared from mica particles or other layer silicate particles and a metal-oxide coating, the metal-oxide coating being poorly soluble or insoluble in acids, b) the thus obtained metal-oxide-coated mica particles or other layer particles are leached with a mineral acid, possibly together with an oxidant, and c) the dyeing of the thus produced metal-oxide-coated, porous silica skeletons of mica particles or of other layer silicate particles, containing few or no cations, is carried out using at least one dye or one color pigment.

REFERENCES:
patent: 4192691 (1990-03-01), Armanini
patent: 4883539 (1989-11-01), Mattila et al.

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