Soap free conveyor lubricant that gives clear solutions in water comprising alkoxyphosphate ester, alkyl benzene sulfonate and carboxylic acid
AssigneeEcolab Inc.
InventorsRolf Scharf, Karl-Heinz Schmitz
Life of this patent
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Abstract
The invention relates to aqueous, clear solution-forming, substantially soap free lubricant compositions and to the use of the lubricant compositions according to the invention, especially as lubricants for the transport of glass bottles or poly(ethylene terephthalate) bottles. The substantially neutral aqueous lubricant compositions (pH 6-8) contain alkyl benzenesulfonates, partial phosphate esters with alkoxylated aliphatic alcohols, and aliphatic carboxylic acids, optionally in addition to typical solubilizers, solvents, foam inhibitors and disinfectants.
Claims14
An aqueous, optically clear, substantially soap free lubricant composition having a pH value in the range from about 6 to about 8, capable of being diluted with optically clear hard water to form an optically clear solution therein, and comprising water and:
- (a) from about 0.02 to about 15% by weight based on the total composition of alkyl benzene sulfonate molecules containing 10 to 18 carbon atoms in the alkyl part and having cations that are selected from the group consisting of alkali metal ions, ammonium ions and alkanolammonium ions containing 1 to about 14 carbon atoms in the alkanolamine part;
- (b) from about 0.02 to about 15% by weight based on the total composition of partially esterified phosphonic acid or phosphate molecules corresponding to general formula (I) ##STR2## in which R.sup.1 is selected from the group consisting of aliphatic monovalent hydrocarbon radicals containing about 12 to about 18 carbon atoms, R.sup.2 is H or CH.sub.3, X is hydrogen or an alkali metal, and n is an integer in the range of about 8 to about 12;
- and
- (c) from about 0.01 to about 10% by weight of the total composition of molecules selected from the group consisting of aliphatic carboxylic acids containing about 6 to about 22 carbon atoms and having a titer of not more than 20.degree. C.;
- and, optionally,
- (d) conventional solubilizers, solvents, foam inhibitors, disinfectants, or mixtures thereof, component (a) and component (b) being present in a ratio by weight of about 3:1 to about 1:3 and component (c) being present in a ratio by weight to the sum of components (a) and (b) of from about 1:20 to about 1:4.
In a process comprising lubricating continuous conveyors of vessels for containing food or beverages, the improvement wherein the lubricant used is an aqueous, optionally clear, substantially soap free lubricant composition having a pH value in the range from about 6 to about 8, and comprises water and:
- (a) from about 0.02 to about 15% by weight based on the total composition of alkyl benzenesulfonate molecules containing about 10 to about 18 carbon atoms in the alkyl part and having cations there are selected from the group consisting of alkali metal ions, ammonium ions, and alkanolammonium ions containing 1 to about 14 carbon atoms in the alkanolamine part;
- (b) from about 0.02 to about 15% by weight based on the total composition of partially esterified phosphonic acid or phosphate molecules corresponding to general formula (I) ##STR3## in which R.sup.1 is selected from the group consisting of aliphatic monovalent hydrocarbon radicals containing about 12 to about 18 carbon atoms, R.sup.2 is H or CH.sub.3, X is hydrogen or an alkali metal, and n is an integer in the range from about 8 to about 12;
- and
- (c) from about 0.01 to about 10% by weight of the total composition of molecules selected from the group consisting of aliphatic carboxylic acids containing about 6 to about 22 carbon atoms and having a titer of not more than about 20.degree. C.;
- and, optionally,
- (d) conventional solubilizers, solvents, foam inhibitors, disinfectants, or mixtures thereof, component (a) and component (b) being present in a ratio by weight of about 3:1 to about 1:3 and component (c) being present in a ratio by weight to the sum of components (a) and (b) of from about 1:20 to about 1:4.
Dependencies are inferred from the claim text.