Washing method and clothes detergent composition
First Claim
1. A clothes washing method which comprises:
- (i) adding a phosphorus-free clothes detergent composition comprising (a) one or more surfactants, (b) one or more alkali metal silicates having an SiO2 /M2 O ratio of from 0.5 to 2.6 wherein M stands for an alkali metal, and (c) one or more metal ion capturing agents other than the alkali metal silicate (b) selected from the group consisting of carboxylate polymers;
aluminosilicates;
aminotri(methylenephosphonic acid);
1-hydroxyethylidene-1,1-diphosphonic acid;
ethylenediaminetetra (methylenephosphonic acid);
diethylenetriaminepenta (methylenephosphonic acid); and
salts thereof;
salts of phosphonocarboxylic acids;
amino acid salts and aminopolyacetates, wherein the total amount of (a), (b), and (c) components occupies 70 to 100% by weight of the entire composition, and wherein the weight ratio of the alkali metal silicate (b) to the metal ion capturing agent other than the alkali metal silicate (c) is not more than 5/1, to washing water in an amount sufficient to produce a washing liquid having the following washing conditions;
(1) a pH of not less than 10.60;
(2) containing a material having an ion capturing capacity in an amount sufficient for theoretically changing the water hardness of said washing water to be not more than 0.5°
DH; and
(3) having a surfactant concentration of from 0.07 to 0.17 g/L; and
(ii) washing clothes in said washing liquid.
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Accused Products
Abstract
A washing method is described which has excellent washing power and a low surfactant concentration. The described clothes washing method comprises the use of a phosphorus-free clothes detergent composition comprising (a) one or more surfactants, (b) one or more alkali metal silicates, and (c) one or more metal ion capturing agents other than the alkali metal silicate (b). The above detergent composition is added to water in an amount sufficient to produce a washing liquid having the following washing conditions (1) a pH of not less than 10.60; (2) containing a material having an ion capturing capacity in an amount sufficient for theoretically changing the water hardness of said water to be not more than 0.5° DH; and (3) having a surfactant concentration of from 0.07 to 0.17 g/L.
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Citations
17 Claims
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1. A clothes washing method which comprises:
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(i) adding a phosphorus-free clothes detergent composition comprising (a) one or more surfactants, (b) one or more alkali metal silicates having an SiO2 /M2 O ratio of from 0.5 to 2.6 wherein M stands for an alkali metal, and (c) one or more metal ion capturing agents other than the alkali metal silicate (b) selected from the group consisting of carboxylate polymers;
aluminosilicates;
aminotri(methylenephosphonic acid);
1-hydroxyethylidene-1,1-diphosphonic acid;
ethylenediaminetetra (methylenephosphonic acid);
diethylenetriaminepenta (methylenephosphonic acid); and
salts thereof;
salts of phosphonocarboxylic acids;
amino acid salts and aminopolyacetates, wherein the total amount of (a), (b), and (c) components occupies 70 to 100% by weight of the entire composition, and wherein the weight ratio of the alkali metal silicate (b) to the metal ion capturing agent other than the alkali metal silicate (c) is not more than 5/1, to washing water in an amount sufficient to produce a washing liquid having the following washing conditions;(1) a pH of not less than 10.60; (2) containing a material having an ion capturing capacity in an amount sufficient for theoretically changing the water hardness of said washing water to be not more than 0.5°
DH; and(3) having a surfactant concentration of from 0.07 to 0.17 g/L; and (ii) washing clothes in said washing liquid. - View Dependent Claims (2, 3, 4, 5)
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6. A phosphorous-free clothes detergent composition comprising components (a) to (c):
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(a) one or more surfactants; (b) one or more alkali metal silicates having an SiO2 /M2 O ratio of from 0.5 to 2.6 wherein M stands for an alkali metal; and (c) one or more metal ion capturing agents selected from the group consisting of carboxylate polymers;
aluminosilicates;
aminotri(methylenephosphonic acid);
1-hydroxyethylidene-1,1-diphosphonic acid;
ethylenediaminetetra (methylenephosphonic acid);
diethylenetriaminepenta (methylenephosphonic acid); and
salts thereof;
salts of phosphonocarboxylic acids;
amino acid salts and aminopolvacetates,wherein the total amount of (a), (b), and (c) components occupies 70 to 100% by weight of the entire composition, and wherein the weight ratio of component (b) to component (a) is 9/1 to 1/2, and the weight ratio of component (b) to component (c) is 5/1 to 1/15. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A clothes washing method which comprises:
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(i) adding a phosphorus-free clothes detergent composition comprising (a) one or more surfactants, (b) one or more alkali metal silicates having an SiO2 /M2 O ratio of from 0.5 to 2.6 wherein M stands for an alkali metal, and (c) one or more metal ion capturing agents selected from the group consisting of carboxylate polymers;
aluminosilicates;
aminotri(methylenephosphonic acid);
1-hydroxyethylidene-1,1-diphosphonic acid;
ethylenediaminetetra(methylenephosphonic acid);
diethylenetriaminepenta(methylenephosphonic acid); and
salts thereof;
salts of phosphonocarboxylic acid;
amino acid-- salts and aminopolyacetates, wherein the total amount of (a), (b), and (c) components occupies 70 to 100% by weight of the entire composition,and wherein the weight ratio of component (b) to component (a) is 9/1 to 1/2, and the weight ratio of component (b) to component (c) is 5/1 to 1/15, to washing water in an amount sufficient to produce a washing liquid having the following washing conditions; (1) a pH of not less than 10.60; (2) containing a material having an ion capturing capacity in an amount sufficient for theoretically changing the water hardness of said washing water to be not more than 0.5°
DH; and(3) having a surfactant concentration of from 0.07 to 0.17 g/L; and (ii) washing clothes in said washing liquid.
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Specification