Terpene-base microemulsion cleaning composition
AssigneePPG Industries, Inc.
InventorWilliam A. Williams
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Abstract
Oil-in-water microemulsion cleaning compositions comprising four principal components are described. These four components are a terpene solvent, e.g., d-limonene, an aliphatic glycol monoether co-solvent, e.g., dipropylene glycol monomethyl ether, a mixture of non-ionic surfactants selected from (1) a capped alkylphenol ethoxylate or an ethoxylated higher aliphatic alcohol, and (2) a fatty acid alkanolamide, and water. The cleaning composition may be used in concentrated form or in a diluted form. The composition may be used for cleaning soil from among others glass and metal parts.
Claims8
A cleaning composition in concentrated form consisting essentially of an oil-in-water microemulsion of:
- (a) from about 5 to about 20 weight percent of terpene hydrocarbon solvent,
- (b) from about 30 to about 50 weight percent of a non-ionic surfactant mixture of:
- (1) a first nonionic surfactant selected from the group consisting of:
- (i) capped alkylphenol alkoxylate surfactant represented by the general formula,
- (R).sub.a Ph--O--A--O.sub.y (CH.sub.2 --CH.sub.2 --O.sub.x --B,
- wherein R is a C.sub.8 -C.sub.12 alkyl, Ph is phenylene, A is a bivalent alkyleneoxy group selected from the group consisting of propyleneoxy, butyleneoxy and mixtures of propyleneoxy and butyleneoxy groups, B is selected from the group consisting of benzyl, methyl, ethylchloro and (CH.sub.2 --CH(CH.sub.3)--O--.sub.b H, a is the integer 1 or 2, b is a number from 3 to 4, x is a number of from 6 to 20, and y is a number from 0 to 4, and
- (ii) an alkoxylated aliphatic alcohol surfactant represented by the general formula,
- R"--O--A--O.sub.y CH.sub.2 --CH.sub.2 --O.sub.x H,
- wherein R" is a C.sub.8 -C.sub.18 alkyl, and A , x and y are as defined hereinabove, and
- (2) a second nonionic surfactant comprising a fatty acid alkanolamide, produced by condensing equimolar amounts of amine and fatty acid, represented by the general formula,
- R'--C(O)--N(R.sub.1)CH.sub.2 CH.sub.2 OH,
- wherein R' is a C.sub.12 -C.sub.18 aliphatic group and R.sub.1 is hydrogen or hydroxyethyl, the weight ratio of surfactant (1) to surfactant (2) being from about 2:1 to about 5:1, and
- (c) from about 10 to about 35 weight percent of a monoether co-solvent represented by the general formula,
- R.sub.2 O CH.sub.2 --CH(R.sub.3)--O.sub.z CH.sub.2 --CH(CH.sub.3)--O.sub.w H,
- wherein R.sub.2 is selected from the group consisting of a C.sub.1 -C.sub.4 alkyl and phenyl, R.sub.3 is a hydrogen or methyl, w is 0 or 1, and z is a number of from 1 to 2, provided that z is 1 and R.sub.3 is hydrogen when w is 1, and
- (d) the balance water.
Dependencies are inferred from the claim text.