Claims
- 1. A method of washing a soiled textile comprising cotton, the method comprising contacting the textile with a wash liquor, the wash liquor containing a soil-release effective amount of one or more soil release polymers obtained by polymerizing one or more polyisocyanates with one or more polymeric polyols having an average molar mass of above 1000 D and a 20° C. water solubility of above 300 g of polymer per liter, one or more polyols having an average molar mass of below 12,000 D and a 20° C. water solubility of below 100 g per liter, and optionally one or more further polyols.
- 2. The method of claim 1, wherein the textile has already been washed in the presence of the one or more soil release polymers before becoming soiled.
- 3. The method of claim 1, wherein the wash liquor further comprises one or more polyester-active dicarboxylic acid soil release polymers and optionally one or more polymeric diols.
- 4. The mthod of claim 1, wherein the one or more polymeric polyols having an average molar mass of above 1000 D and a 20° C. water solubility of above 300 g of polymer per liter comprise a compound of formula (I)
- 5. The method of claim 1, wherein the one or more polymeric polyols having an average molar mass of above 1000 D and a 20° C. water solubility of above 300 g of polymer per liter comprise a polyethylene glycol.
- 6. The method of claim 5, wherein the polyethylene glycol has an average molar mass between 3000 and 12,000 D.
- 7. The method of claim 1, wherein the one or more polyols having an average molar mass of below 12,000 D and a 20° C. water solubility of below 100 g per liter conform to one or more of the general formulae (II) to (V)
- 8. The method of claim 1, wherein the one or more polyisocyanates comprise a molecule of the general structure (O═C═N-)tZ, wherein t represents 2 or 3, Z is an aliphatic or aromatic radical or a radical which comprises both aliphatic and aromatic groups.
- 9. The method of claim 8, wherein the one or more polyisocyanates comprise a diisocyanate.
- 10. The method of claim 9, wherein the diisocyanate is diphenylmethane diisocyanate and/or tetramethylxylol diisocyanate.
- 11. The method of claim 1, using a molar ratio of polyol to polyisocyanate of 1:1 to 1.5:1.
- 12. The method of claim 11, using a molar ratio of polyol to polyisocyanate of 1.05:1 to 1.3:1.
- 13. The method of claim 1, comprising a first stage of forming a prepolymer by reacting a diisocyanate and a polymeric diol of formula (I)
- 14. The method of claim 13, wherein a different diisocyanate is used in the second stage than in the first stage.
- 15. The method of claim 13, wherein a plurality of polymeric diols of formula (I) having different degrees of polymerization is used, the polymeric diol of formula (I) having the lowest degree of polymerization being used in the first stage, and that or those polymeric diols of formula (I) having having higher degrees of polymerization being used in the second stage together with the one or more diols of formulae (II), (III), (IV) or (V).
- 16. The method of claim 15, wherein the first stage uses one or more polymeric diols of formula (I) where b represents a number from 3 to 16 and the second stage uses one or more polymeric diols of formula (I) where b represents a number from 17 to 800.
- 17. A laundry detergent composition comprising a soil release polymer obtained by polymerization of one or more polyisocyanates with one or more polymeric polyols having an average molar mass of above 1000 D and a 20° C. water solubility of above 300 g of polymer per liter and also one or more polyols having an average molar mass of below 12,000 D and a 20° C. water solubility of below 100 g per liter and also optionally one or more further polyols and mixtures thereof.
- 18. The composition of claim 17, comprising the soil release polymer in amounts from 0.1% to 5% by weight.
- 19. The composition of claim 18, comprising the soil release polymer in amounts from 0.5% to 2.5% by weight.
Priority Claims (2)
Number |
Date |
Country |
Kind |
101 51 287.2 |
Oct 2001 |
DE |
|
101 52 308.4 |
Oct 2001 |
DE |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation under 35 U.S.C. § 365(c) and 35 U.S.C. § 120 of international application PCT/EP02/11446, filed on Oct. 12, 2002. This application also claims priority under 35 U.S.C. § 119 of DE 101 51 287.2, filed Oct. 22, 1001 and DE 101 52 308.4, filed Oct. 26, 2001, each of which is incorporated herein by reference in its entirety.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP02/11446 |
Oct 2002 |
US |
Child |
10830501 |
Apr 2004 |
US |