Siloxane automotive protectant compositions
AssigneeWacker Silicones Corporation
InventorsRonald L. Muntz, Michael D. Lowery, Bryan E. Fry
Life of this patent
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Abstract
Gloss and ease of application of sprayable aqueous organopolysiloxane vinyl protectant emulsions are both improved by the addition of a gloss-improving additive. Protectants may be formulated to achieve higher gloss with the same amount of active organopolysiloxane or the same or higher gloss with less organopolysiloxane. Preferred gloss-improving additives are water soluble organic viscosifiers and/or minor amounts of inorganic, viscosity-increasing particulate solids.
Claims24
A sprayable automotive protectant, suitable for applying to an elastomeric polymer surface, said protectant comprising an aqueous dispersion of an organopolysiloxane active ingredient comprising one or more organopolysiloxane fluids, said one or more fluids individually having a neat viscosity of from about 10 cSt to about 1,000,000 cSt, said active ingredient present in an amount of less than or equal to 20 weight percent, and a gloss-improving additive which provides for higher gloss when applied to said elastomeric polymer surface than the same composition not including said gloss-improving additive, said protectant having an emulsion viscosity of less than about 4,000 cP, wherein said emulsion viscosity is greater by minimally 100% in the presence of said gloss-improving additive than the viscosity in the absence of said gloss-improving additive, said gloss-improving additive selected from the group consisting of water soluble thickeners and water-insoluble inorganic thickeners, said gloss-improving additive present in an amount of 2% by weight solids or less based on the weight of the protectant.
A method of improving the gloss of an aqueous, sprayable organopolysiloxane automotive protectant emulsion containing from 10 to 20% by weight organopolysiloxane based on the total weight of the protectant emulsion said method comprising increasing the viscosity of said emulsion by adding an effective viscosity increasing amount and less than 2% by weight of a gloss-improving additive based on the total weight of the protectant emulsion, the final protectant viscosity being less than about 4000 cP.
A sprayable automotive protectant suitable for applying to elastomeric polymer surfaces, said protectant comprising an aqueous emulsion of 20 weight percent or less based on the weight of the protectant of at least one organopolysiloxane having a neat viscosity of 10 cSt to 1,000,000 cSt, an amount of an organic thickening agent sufficient to produce at least a 200% increase in emulsion viscosity relative to the viscosity of the organopolysiloxane emulsion not containing said organic thickening agent, said organic thickening agent present in an amount which is insufficient, upon drying, to form a coherent polymer film, the viscosity of said protectant being 4000 cP or less.
Dependencies are inferred from the claim text.