Pigment dispersions
OwnerFarshid Sabooriinventor
Life of this patent
Estimating the term…
Abstract
This invention relates to compositions that are dispersions of pigments in the form of premixes that may be used to colour a variety of products such as plastics materials, inks and surface coatings and more particularly to compositions that are thixotropic. It also relates to premixes based on water soluble pigments that display Newtonian rheology. The compositions utilise water insoluble pigments having particle sizes that are less then about 10 microns. Both the thixotropic compositions and the Newtonian compositions include water soluble polyols and water. The pH of the premix may be adjusted to be in the range of 4-9 utilising acid or alkali as appropriate.
Claims15
A thixotropic premix composition comprising a tinctorially effective amount of one or more water insoluble pigments having a particle size of less than about 10 microns, one or more water soluble polyols and water, and optionally, one or more water soluble alcohols, an antifoam, soya lecithin, one or more preservatives, and sufficient acid or alkali so that the premix has a pH in the range of from 4 to 9.
A coloured product which includes a tinctorially effective amount of a thixotropic premix composition which comprises one or more water insoluble pigments having a particle size of less than about 10 microns, one or more water soluble polyols and water, and optionally, one or more water soluble alcohols, an antifoam, soya lecithin, one or more preservatives and sufficient acid or alkali so that the premix has a pH in the range of from 4 to 9.
A Newtonian premix composition comprising a tinctorially effective amount of one or more water soluble pigments, one or more water soluble polyols and water, and optionally, one or more water soluble alcohols, an antifoam, soya lecithin, one or more preservatives and sufficient acid or alkali so that the premix has a pH in the range of from 4 to 9.
A coloured product which includes a tinctorially effective amount of a Newtonian premix composition which comprises one or more water soluble pigments, one or more water soluble polyols and water, and optionally, one or more water soluble alcohols, an antifoam and soya lecithin, one or more preservatives and sufficient acid or alkali so that the premix has a pH in the range of from 4 to 9.
Dependencies are inferred from the claim text.