Stable, compatible thixotropic gel with copolymer gelling agent
AssigneeAllied Chemical Corporation
InventorIrving B. Chang
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Abstract
A stable, compatible thixotropic gel of the type gelled from a mixture including a solvent, a cosolvent and a gelling agent. The gelling agent comprises a copolymer of ethylene and at least one comonomer selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, esterified acrylic acid, vinyl acetate, vinyl formate, vinyl propionate and mixtures thereof. The copolymer has a number average molecular weight between about 500 and about 10,000.
Claims35
A stable, compatible thixotropic gel composition having in the oil phase between about 5 and about 60 weight % gellant, between about 5 and about 50 weight % of a solvent incompatible at room temperature with the gellant and between about 20 and about 90 mole % of a cosolvent compatible with both the gellant and the solvent, at least 25 weight % of said gellant being a copolymer having between about 40 and about 96 mole % ethylene monomer and between about 4 and about 60 mole % of a comonomer selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, esterified acrylic acid, vinyl acetate, vinyl formate, vinyl propionate and mixtures thereof, said copolymer having a number average molecular weight between about 500 and about 10,000, said copolymer being present in a proportion great enough to maintain said gel composition stable from 10.degree. to 50.degree. C.
The gel composition of clim 10 containing the oil phase said copolymer, isopropyl myristate and silicone oil in proportions within the region bounded by line F in FIG. 2.
Dependencies are inferred from the claim text.