Process for cleaning dishware

Patent metadata

Field	Value
Publication number	US-2018201876-A1
Application number	US-201615742568-A
Country	US
Kind code	A1
Filing date	Jul 6, 2016
Priority date	Jul 9, 2015
Publication date	Jul 19, 2018
Grant date	—

Abstract

A process for cleaning dishware soiled with fatty residue is disclosed. The process is carried out at a temperature in the range of from 45 to 65° C. and using at least one formulation, comprising (A) at least one complexing agent, selected from the alkali metal salts of citric acid, aminocarboxylic acids and from sodium tripolyphosphate, (B) at least one non-ionic surfactant of general formula R 1 —CH(OH)—CH 2 —O-(AO) x —R 2 , and (C) at least one copolymer.

First claim

1 . A process for cleaning dishware soiled with fatty residue, wherein said process is carried out at a temperature in the range of from 45 to 65° C. using at least one formulation, comprising
(A) at least one complexing agent, selected from alkali metal salts of citric acid, of aminocarboxylic acids and from sodium tripolyphosphate,
(B) at least one non-ionic surfactant of general formula (I)
R 1 —CH(OH)—CH 2 —O-(AO) x —R 2   (I), and

(C) at least one copolymer selected from polyalkoxylated polyalkylenimes and polyalkoxylated polyalkanolamines, wherein said at least one copolymer contains at most 25 mol-% of ethylene oxide moieties in polyalkylenoxide chains with respect to total alkylenoxide content,
wherein:
R 1 is selected from C 4 -C 30 -alkyl, straight-chain or branched, and from C 4 -C 30 -alkylene, straight-chain or branched, with at least one C—C double bond,
R 2 is selected from C 1 -C 30 -alkyl, straight-chain or branched, and from C 2 -C 30 -alkylene, straight-chain or branched, with at least one C—C double bond,
x is selected from one to 100, and
AO is identical or different alkylene oxides, selected from CH 2 —CH 2 —O, (CH 2 ) 3 —O, (CH 2 ) 4 —O, CH 2 CH(CH 3 )—O, CH(CH 3 )—CH 2 —O— and CH 2 CH(n-C 3 H 7 )—O.

2 . The process according to claim 1 , wherein said formulation contains
in the range of from 10 to 50% by weight complexing agent (A), in the range of from 1 to 10% by weight of non-ionic surfactant (B), in the range of from 0.1 to 10% by weight of copolymer (C), based on a total solids content of said formulation.

3 . The process according to claim 1 , wherein complexing agent (A) is further selected from alkali metal salts of methyl glycine diacetate (MGDA), iminodisuccinic acid (IDS) and glutamic acid diacetate (GLDA).

4 . The process according to claim 1 , wherein copolymer (C) has an average molecular weight M w in the range of from 2,500 to 100,000 g/mol.

5 . The process according to claim 1 , wherein polyalkoxylated polyalkanolamines are selected from polycondensates of triethanolamine with an average of at least 8 equivalents of propylene oxide per OH group.

6 . The process according to claim 1 , wherein said formulation further contains an alkali metal salt of a (meth)acrylic acid homopolymer.

7 . The process according to claim 1 , wherein copolymer (C) is selected from polyalkoxylated polyethylenimes and polyalkoxylated polyalkanolamines with a solubility in water of at most 5 g/l at 20° C.

8 . A formulation, comprising
(A) at least one complexing agent, selected from alkali metal salts of citric acid, aminocarboxylic acids and from sodium tripolyphosphate, (B) at least one non-ionic surfactant of general formula (I)
R 1 —CH(OH)—CH 2 —O-(AO) x —R 2   (I), and

(C) at least one copolymer selected from polyalkoxylated polyalkylenimes and polyalkoxylated polyalkanolamines, wherein said at least one copolymer contains at most 25 mol-% of ethylene oxide moieties in polyalkylenoxide chains with respect to total alkylenoxide content, wherein: R 1 is selected from C 4 -C 30 -alkyl, straight-chain or branched, and from C 4 -C 30 -alkylene, straight-chain or branched, with at least one C—C double bond, R 2 is selected from C 1 -C 30 -alkyl, straight-chain or branched, and from C 2 -C 30 -alkylene, straight-chain or branched, with at least one C—C double bond, x is selected from one to 100, and AO is identical or different alkylene oxides, selected from CH 2 —CH 2 —O, (CH 2 ) 3 —O, (CH 2 ) 4 —O, CH 2 CH(CH 3 )—O, CH(CH 3 )—CH 2 —O— and CH 2 CH(n-C 3 H 7 )—O.

9 . The formulation according to claim 8 , wherein said formulation contains
in the range of from 10 to 50% by weight complexing agent (A), in the range of from 1 to 10% by weight of non-ionic surfactant (B), in the range of from 0.1 to 10% by weight of copolymer (C), based on a total solids content of said formulation.

10 . The formulation according to claim 8 , wherein complexing agent (A) is further selected from alkali metal salts of methyl glycine diacetate (MGDA), iminodisuccinic acid (IDS) and glutamic acid diacetate (GLDA).

11 . The formulation according to claim 8 , wherein polyalkoxylated polyalkanolamines are selected from polycondensates of triethanolamine with an average of at least 8 equivalents of propylene oxide per OH group.

12 . The formulation according to claim 8 , wherein said formulation further contains an alkali metal salt of a (meth)acrylic acid homopolymer.

13 . The formulation according to claim 8 , wherein copolymer (C) has an average molecular weight M w in the range of from 2,500 to 100,000 g/mol.

14 . The formulation according to claim 8 , wherein copolymer (C) is selected from polypropoxylated polyethylenimes and polypropoxylated polyalkanolamines with a solubility in water of at most 5 g/l at 20° C.

Assignees

• Basf Se

Inventors

• Garcia Marcos Alejandra
• Weber Heike
• Hueffer Stephan
• Reis-Walther Eva-Maria
• Dietsche Frank

Classifications

• C11D3/37

  Polymers {(polymeric surface-active agents C11D1/008; polysaccharides C11D3/222)} · CPC title

• C11D1/825 Primary

  Mixtures of compounds all of which are non-ionic · CPC title

• C08G73/024 Primary

  Polyamines containing oxygen in the form of ether bonds in the main chain · CPC title

• C11D3/33

  Amino carboxylic acids · CPC title

• B08B3/08

  the liquid having chemical or dissolving effect · CPC title