Self-dispersing pigments
AssigneeE.I. du Pont de Nemours and Company
InventorsFranck Andre Vanhecke, Mitchell Scott Chinn
Life of this patent
Estimating the term…
Abstract
The disclosure provides self-dispersing pigment having an isoelectric point of at least about 8 comprising an inorganic particle, and in particular a titanium dioxide (TiO2) pigment, treated sequentially by: hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface; and 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.
Claims19
A self-dispersing pigment having an isoelectric point of at least about 8, preferably about 8 to about 10, comprising an inorganic particle treated sequentially by
- (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.