Pigment dispersion system
AssigneeCroda Singapore Pte Limited
InventorsDavid Dowdell, Steven Wright
Life of this patent
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Abstract
Preblends and preblend systems can be produced for use in, amongst other things, sunscreen products. These preblend systems and preblends can have high pigment loads, generally low viscosity and a relatively high thixotropic index making it both easy to use and very stable. Finished products including preblends and preblend systems are also described.
Claims12
An anhydrous preblend system comprising:
- a mixture of a nonionic emulsifier in an amount of about 5 and about 30% by weight, an emollient ester which is a dicarboxylic acid or tricarboxylic acid ester of alkoxylated fatty alcohols whose acid portion have about 4 to about 6 carbons, fatty portion ranges from about 6 and 22 carbons in length, and which includes 1-50 alkoxy units, provided in an amount which ranges from about 5 to about 30% by weight and a substrate selected from esters and oils, provided in an amount which ranges from about 40 to about 90% by weight, and wherein the weights are measured against the total weight of said preblend system.
An anhydrous preblend system consisting essentially of a mixture of a nonionic emulsifier in an amount of about 5 and about 50% by weight, an emollient ester which is a monocarboxylic acid, dicarboxylic acid or tricarboxylic acid ester of alkoxylated fatty alcohols whose acid portion have about 2 to about 12 carbons, fatty portions range from about 6 and 22 carbons in length, and which includes 1-50 alkoxy units, provided in an amount which ranges from about 5 to about 50% by weight and a substrate selected from esters and oils, provided in an amount which ranges from about 20 to about 90% by weight, and wherein the weights are measured against the total weight of said preblend system.
Dependencies are inferred from the claim text.