Detergents or cleaning agents comprising a water-soluble building block system and a cellulose derivative with dirt dissolving properties
View Patent ↗A builder-containing laundry detergent or cleaning composition comprising: (1) a water-soluble builder block which comprised of: a) from 5% by weight to 35% by weight of citric acid, an alkali metal citrate, an alkali metal carbonate, and/or an alkali metal hydrogen carbonate, b) up to 5% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5, c) up to 2% by weight of phosphonic acid and/or alkali metal phosphate, d) up to 50% by weight of alkali metal phosphate, and e) up to 10% by weight of polymeric polycarboxylate, wherein at least two of components b), c), d) and e) are present in amounts greater than 0% by weight, and (2) a soil release-capable alkyl or hydroxyalkyl cellulose derivative. The soil release-capable action of cellulose derivatives is particularly marked when they are used in laundry detergents or cleaning compositions which comprise only water-soluble builders.
1. A builder-containing laundry detergent or cleaning composition comprising:
(1) a water-soluble builder comprising:
a) from 5% by weight to 35% by weight of either citric acid or an alkali metal citrate in combination with a carbonate mixture comprising an alkali metal carbonate and an alkali metal hydrogen carbonate;
b) from 1% to 5% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5;
c) from 0.05% to 1% by weight of phosphonic acid and/or alkali metal phosphonate;
d) from 15% to 35% by weight of alkali metal phosphate;
e) from 1.5% to 5% by weight of polymeric polycarboxylate; and
(2) a soil release-capable cellulose derivative composition comprising a C 1 to C 3 alkyl cellulose derivative and a C 2 to C 10 hydroxyalkyl cellulose derivative.
2. The composition of claim 1 wherein the mean molar mass of the cellulose derivative is from 10 000 D to 150 000 D.
3. The composition of claim 2 wherein the mean molar mass of the cellulose derivative is from 40 000 D to 120 000 D.
4. The composition of claim 3 wherein the mean molar mass of the cellulose derivative is from 80 000 D to 110 000 D.
5. The composition of claim 1 comprising from 0.1% by weight to 5% by weight of the cellulose derivative.
6. The composition of claim 5 comprising from 0.5% by weight to 2.5% by weight of the cellulose derivative.
7. The composition of claim 1 wherein the amount of the builder is at least 25% by weight.
8. The composition of claim 1 wherein the amount of the builder is up to 55% by weight.
9. The composition of claim 1 wherein the amount of the builder is from 55% by weight to 50% by weight.
10. The composition of claim 1 wherein component a) is comprised of from 15% by weight to 25% by weight of an alkali metal hydrogen carbonate and from 0.05% to 5% by weight of citric acid and/or alkali metal citrate.
11. The composition of claim 10 wherein the amount of citric acid and/or alkali metal citrate is from 0.5% by weight to 2.5% by weight.
12. The composition of claim 1 wherein component a) is comprised of from 5% by weight to 25% by weight of citric acid and/or alkali metal citrate, and from 1% to 5% by weight of an alkali metal carbonate and an alkali metal hydrogen carbonate mixture.
13. The composition of claim 1 wherein component a) comprises an alkali metal carbonate and alkali metal hydrogen carbonate in a weight ratio of from 10:1 to 1:1.
14. The composition of claim 1 wherein component c) is a hydroxyalkylphosphonic and/or aminoalkylphosphonic acid and/or the alkali metal salts thereof.
15. The composition of claim 1 wherein alkali metal phosphate is trisodium polyphosphate.
16. The composition of claim 1 wherein the polymeric polycarboxylate is a homo or copolymer of acrylic acid, methacrylic acid and/or maleic acid.
17. A method of cleaning a textile material comprising contacting a textile material with a laundry detergent according to claim 1 .
18. A process for producing a solid laundry detergent composition comprising mixing a composition comprised of:
(1) particles of a soil release-capable cellulose derivative composition comprising a C 1 to C 3 alkyl cellulose derivative and a C 2 to C 10 hydroxyalkyl cellulose derivative;
(2) a water-soluble builder which is comprised of:
a) from 5% by weight to 35% by weight of either citric acid or an alkali metal citrate in combination with a carbonate mixture comprising an alkali metal carbonate and an alkali metal hydrogen carbonate;
b) from 1% to 5% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5;
c) from 0.05% to 1% by weight of phosphonic acid and/or alkali metal phosphonate;
d) from 15% to 35% by weight of alkali metal phosphate;
e) from 1.5% to 5% by weight of polymeric polycarboxylate; and
(3) a laundry detergent in particulate form.
19. The process of claim 18 wherein the particle which comprises the soil release-capable cellulose derivative is prepared by spray-drying.
20. The process of claim 18 wherein the particle which comprises the soil release-capable cellulose derivative is prepared by using a compacting compounding step.