Claims
- 1. A method of preparing a deicing/anti-icing composition for treatment of aircraft which comprises an aqueous glycol and/or glycerin solution thickened with a polymeric thickener, and/or its salt after neutralization, in an amount sufficient to thicken the fluid to permit its adherence to aircraft surfaces when applied to a stationary aircraft but also permit its windshear-induced removal during takeoff, said polymeric thickener comprising units of, by weight of said thickener,
- (A) about 1 to about 99.9% of one or more alpha, beta-monoethylenically unsaturated carboxylic acids;
- (B) 0 to about 98.9% of one or more monoethylenically unsaturated monomers;
- (C) about 0.1 to about 99% of one or more monoethylenically unsaturated monomers containing at least one pendant hydrophobe moiety; and
- (D) 0 to about 20% of one or more polyethylenically unsaturated monomers,
- said composition comprising, by weight of the total composition,
- (1) at least about 40% of one or more glycols or glycerin or mixture thereof,
- (2) at least about 0.05% of said thickener,
- (3) a neutralizing agent comprising an alkali metal hydroxide in an amount sufficient to provide a pH of at least about 7.1,
- (4) a surfactant which associates with the thickener, in sufficient amount to increase the thickening effect of the thickener,
- (5) optionally an effective amount of a corrosion inhibitor,
- (6) optionally one or more dyes, and
- (7) the remainder being water,
- said method comprising (a) preparing a concentrate of said composition by adding, with agitation, to about 1 to about 20% by weight of the total desired amount of glycol (and/or glycerin)/water solvent, the surfactant and thickener; (b) adding, with agitation, the concentrate of (a) to the remainder of the solvent and agitating sufficiently to create a homogeneous slurry; (c) adding, with agitation, the neutralizing agent to the slurry of (b) and agitating sufficiently to create a homogeneous solution.
- 2. A composition prepared by the method of claim 1.
Parent Case Info
This application is a Division of prior U.S. application Ser. No. 08/586,970 Jan. 16, 1995, now U.S. Pat. No. 5,708,068.
US Referenced Citations (59)
Foreign Referenced Citations (4)
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EPX |
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Non-Patent Literature Citations (2)
Entry |
Jenkins, R.D. et al., Associative Polymers with Novel Hydrophobe Structures, ACS Meeting, New York, New York, Aug. 26, 1991. |
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Divisions (1)
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Number |
Date |
Country |
Parent |
586970 |
Jan 1995 |
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