Rinse composition

Claim 1

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 1 is --(CH 2 ) x CH 3 or --(CH 2 ) x C 6 H 5 ; R 2 is --(CH 2 ) y CH 3 or --(CH 2 ) y C 6 H 5 ; R 3 is >CH-(CH 2 ) z --,>CH--(CH 2 ) z --C 6 H 4 --,>C 6 H 3 --(CH 2 ) z --, or ##EQU5## and x,y or z are zero or integers such that x + y + z are from 7 to 17 when R 1 , R 2 or R 3 comprise alkyl hydrocarbon groups and 6 to 16 when R 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 4 a linear alkyl hydrocarbon chain wherein when n is 0 R 4 is C 10-16 alkyl and when n is from 1-5 R 4 is C 10-18 alkyl; and (c) from 35-80% by weight of lactic, citric or glutaric acid or a mixture thereof.

Claim 6

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 1 is --(CH 2 ) x CH 3 or --(CH 2 ) x C 6 H 5 ; R 2 is --(CH 2 ) y CH 3 or --(CH 2 ) y C 6 H 5 ; R 3 is >CH--(CH 2 ) z --,>CH--(CH 2 ) z --C 6 H 4 --,>C 6 H 3 --(CH 2 ) z --, or ##EQU8## and x, y or z are zero or integers such that x + y + z are from 7 to 17 when R 1 , R 2 or R 3 comprise alkyl hydrocarbon groups and 6 to 16 when R 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 4 a linear alkyl hydrocarbon chain wherein when n is 0 R 4 is C 10-16 alkyl and when n is from 1-5 R 4 is C 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° hardness the dilute solution obtained has a pH of less than 6.5.

Claim 7

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 1 is --(CH 2 ) x CH 3 or --(CH 2 ) x C 6 H 5 ; R 2 is --(CH 2 ) y CH 3 or --(CH 2 ) y C 6 H 5 ; R 3 is >CH--(CH 2 ) z --,>CH--(CH 2 ) z --C 6 H 4 --,>C 6 H 3 --(CH 2 ) z --, or ##EQU8## and x, y or z are zero or integers such that x + y + z are from 7 to 17 when R 1 , R 2 or R 3 comprise alkyl hydrocarbon groups and 6 to 16 when R 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 4 a linear alkyl hydrocarbon chain wherein when n is 0 R 4 is C 10-16 alkyl and when n is from 1-5 R 4 is C 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° hardness the dilute solution obtained has a pH of less than 6.5.