Powder watercolour paint

Abstract

A powder watercolour paint is provided for achieving special colour effects, wherein the paint comprises a powder filler having hydrophobic treatment and particles of an aqueous liquid coloured base containing 0.5 to 10% by weight of coloured pigment or pigment paste, 1.5 to 5% by weight of natural or synthetic gum, and 1 to 5% by weight of a hydrophobizing oil ingredient.

What is claimed is: 
     
         1 . Powder watercolour paint comprising:
 a) powder filler having hydrophobic treatment and in said powder filler encased/dispersed   b) particles of an aqueous liquid coloured base containing in each case, based on the ingredient b), 0.5 to 10% by weight of coloured pigment or pigment paste, 1.5 to 5% by weight of natural or synthetic gum, 1 to 5% by weight of a hydrophobizing oil ingredient, where the balance up to 100% by weight of the ingredient b) consists of water and optionally other common additives for aqueous paint systems,   wherein the ratio is 5 to 20 weight parts of the ingredient b) to each 1 weight part of the ingredient a).   
     
     
         2 . The powder watercolour paint according to  claim 1 , wherein the powder filler is selected from the group of natural or synthetic oxides, silicates or aluminosilicates, optionally hydrated forms thereof. 
     
     
         3 . The powder watercolour paint of  claim 2 , wherein the powder filler is silicon dioxide. 
     
     
         4 . The powder watercolour paint of  claim 1 , wherein the hydrophobic treatment of the powder filler is achieved with the use of a non-polar substance from the group of natural or synthetic solid or liquid hydrocarbons, waxes, fats, oils and synthetic siloxanes. 
     
     
         5 . The powder watercolour paint of  claim 1 , wherein the content of water in the ingredient a) is lower than 20% by weight. 
     
     
         6 . The powder watercolour paint of  claim 1 , wherein the average particle size of the ingredient a) is less than 100 μm. 
     
     
         7 . The powder watercolour paint of  claim 1 , wherein the ingredient b) contains up to 5% by weight of white pigment or pigment paste. 
     
     
         8 . The powder watercolour paint of  claim 1 , wherein the hydrophobizing oily component in the ingredient b) is silicone oil. 
     
     
         9 . The powder watercolour paint of  claim 1 , wherein the natural or synthetic gum in the ingredient b) is guar gum or xanthan gum. 
     
     
         10 . The powder watercolour paint of  claim 1  according to any of the previous claims, characterized in that the viscosity of the ingredient b) is 100 to 5000 mPa·s. 
     
     
         11 . The powder watercolour paint of  claim 1 , wherein the mean diameter of particles of the ingredient b) of the powder watercolor paint is 0.5 to 5 mm. 
     
     
         12 . The powder watercolour paint of  claim 1 , wherein said paint in its ingredient b) contains at least one of other common additives selected independently from the group consisting of a soluble dye, organic water-miscible solvent, glycerol, organic or inorganic acid, dispersing agent, defoaming agent, sodium or potassium hydroxide, natural gum, carboxymethyl cellulose, pearling agent and metallic particles.