Silica containing self-dispersing pigments
AssigneeE. I. Du Pont de Nemours and Company
InventorsMitchell Scott Chinn, Franck Andre Vanhecke
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Abstract
The disclosure provides a self-dispersing pigment having an isoelectric point of at least about 8 comprising an inorganic particle having a silica treatment and an outermost treatment prepared by sequentially: (a) hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface; and (b) adding a dual-functional compound comprising an anchoring group that attaches the dual-functional compound to the pigment surface, and a basic amine group comprising a primary, secondary or tertiary amine. These self-dispersing pigments are useful in making décor paper that may be used in paper laminates.
Claims21
A self-dispersing pigment having an isoelectric point of at least about 8, more preferably about 8 to 10, comprising an inorganic particle having a silica treatment and an outermost treatment prepared by sequentially:
- (a) hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface;
- and
- (b) adding a dual-functional compound comprising
- i. an anchoring group that attaches the dual-functional compound to the pigment surface, and
- ii. a basic amine group comprising a primary, secondary or tertiary amine.
Dependencies are inferred from the claim text.