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US 3,941,713 AGranted
Rinse composition
AssigneeLever Brothers Company
InventorsPeter Leonard Dawson, Michael David Rickard, Michael Tom Rothwell
Life of this patent
Estimating the term…
Abstract
A machine dishwasher rinse aid having the property of imparting an anti-resoiling or non-stick finish to aluminium articles such as pans. The rinse aid contains an anti-resoiling agent which is preferably a monoalkylphosphate ester to achieve this effect. It also contains a nonionic surface active agent and a pH controller in the form of citric, lactic or glutaric acid.
Claims5
A liquid rinse composition for use in machine dishwashing comprising
- a. from 3-30% by weight of a low foaming nonionic surface active agent selected from the group consisting of polyoxyethylene-polyoxypropylene-polyoxyethylene polyols;
- polyoxyethylene-polyoxypropylene condensates of higher aliphatic alcohols having from 8-22 carbon atoms in the aliphatic portion and from 3-50 oxyalkylene units in the oxyalkylene portion;
- polyoxyethylene esters of higher fatty acids having from 8-22 carbon atoms in the acyl group and from 8-30 ethylene oxide units in the oxyethylene portion;
- and polyoxyethylene condensates of higher fatty acid amines and amides having from 8-22 carbon atoms in the fatty alkyl or acyl group and from 10-30 ethylene oxide units in the oxyethylene portion;
- b. from 0.5-10% by weight of a monoalkylphosphate ester selected from the group consisting of esters of the general formula ##EQU4## where n, the actual number of ethylene oxide units, is 0-5;
- R.sub.1 is --(CH.sub.2).sub.x CH.sub.3 or --(CH.sub.2).sub.x C.sub.6 H.sub.5 ;
- R.sub.2 is --(CH.sub.2).sub.y CH.sub.3 or --(CH.sub.2).sub.y C.sub.6 H.sub.5 ;
- R.sub.3 is >CH-(CH.sub.2).sub.z --,>CH--(CH.sub.2).sub.z --C.sub.6 H.sub.4 --,>C.sub.6 H.sub.3 --(CH.sub.2).sub.z --, or ##EQU5## and x,y or z are zero or integers such that x + y + z are from 7 to 17 when R.sub.1, R.sub.2 or R.sub.3 comprise alkyl hydrocarbon groups and 6 to 16 when R.sub.3 comprises aryl or hydroxyalkyl groups;
- and mono-substituted organic phosphates of the general formula ##EQU6## n being the actual number of ethylene oxide units and R.sub.4 a linear alkyl hydrocarbon chain wherein when n is 0 R.sub.4 is C.sub.10-16 alkyl and when n is from 1-5 R.sub.4 is C.sub.10-18 alkyl;
- and
- (c) from 35-80% by weight of lactic, citric or glutaric acid or a mixture thereof.
8 more elements
A method of providing an anti-resoiling film on the surface of aluminium articles which comprises rinsing the articles in a dilute solution of a rinse composition, said rinse comprising
- a. from 3-30% by weight of a low foaming surface active agent selected from the group consisting of polyoxyethylene-polyoxypropylene-polyoxyethylene polyols;
- polyoxyethylenepolyoxypropylene condensates of higher aliphatic alcohols having from 8-22 carbon atoms in the aliphatic portion and from 3-50 oxyalkylene units in the oxyalkylene portion;
- polyoxyethylene esters of higher fatty acids having from 8-22 carbon atoms in the acyl group and from 8-30 ethylene oxide units in the oxyethylene portion;
- and polyoxyethylene condensates of higher fatty acid amines and amides having from 8-22 carbon atoms in the fatty alkyl or acyl group and from 10-30 ethylene oxide units in the oxyethylene portion;
- b. from 0.5-10% by weight of a monoalkylphosphate ester selected from the group consisting of esters of the general formula ##EQU7## where n, the actual number of ethylene oxide units, is 0-5;
- R.sub.1 is --(CH.sub.2).sub.x CH.sub.3 or --(CH.sub.2).sub.x C.sub.6 H.sub.5 ;
- R.sub.2 is --(CH.sub.2).sub.y CH.sub.3 or --(CH.sub.2).sub.y C.sub.6 H.sub.5 ;
- R.sub.3 is >CH--(CH.sub.2).sub.z --,>CH--(CH.sub.2).sub.z --C.sub.6 H.sub.4 --,>C.sub.6 H.sub.3 --(CH.sub.2).sub.z --, or ##EQU8## and x, y or z are zero or integers such that x + y + z are from 7 to 17 when R.sub.1, R.sub.2 or R.sub.3 comprise alkyl hydrocarbon groups and 6 to 16 when R.sub.3 comprises aryl or hydroxyalkyl groups;
- and mono-substituted organic phosphates of the general formula ##EQU9## n being the actual number of ethylene oxide units and R.sub.4 a linear alkyl hydrocarbon chain wherein when n is 0 R.sub.4 is C.sub.10-16 alkyl and when n is from 1-5 R.sub.4 is C.sub.10-18 alkyl;
- and
- c. citric, lactic or glutaric acids or a mixture thereof in amount, being not less than 35 nor more than 80% by weight of said rinse composition, such that when 6 mls of said rinse composition is added to from 9-10 liters of water of 24.degree. hardness the dilute solution obtained has a pH of less than 6.5.
8 more elements
Dependencies are inferred from the claim text.