Patent ID: 7098179
Filing Date: 2006-08-29
Classification: C08G,C11D

Abstract:
1. A method of washing a soiled textile comprising cotton, the method comprising contacting the textile with a wash liquor, the wash liquor is comprised of a soil-release effective amount of a soil release polymer which is an ecologically and toxicologically safe polyurethane which is the product of the process comprising the steps of polymerizing one or more polyisocyanates with (a) an excess of one or more polymeric polyols of the formula I to form an OH-terminated prepolymer wherein one or more polymeric polyols have an average molar mass of above 1000 D and a 20° C. water solubility of above 300 g of polymer per liter; wherein a is a number from 1 to 3; b is a number from 17 to 800 and c is a number from 1 to 6; wherein b can vary within any one molecule; W is H— when c=1, —(CH2) d — when c=2, wherein d is a number from 2 to 12; —CH 2 (CH) e CH 2 — when c=e+2, wherein e is a number from 1 to 4; —(CH 2 ) e CH (CH 2 )—(CH 2 ) e — when c=3; or any aliphatic, alicyclic or aromatic radical or a radical which comprises both aliphatic and aromatic groups and (b) reacting the prepolymer with one or more polyols of the formula II, III, IV, or V where X is a linear or branched alkylene group having 1 to 48 carbon atoms and Y is hydrogen or an alkyl group having 1 to 24 carbon atoms; wherein R where Cy is phenylene or cyclohexylidene; R 2 is hydrogen or an alkyl group having 1 to 6 carbon atoms, each of R 3 and R 4 is independently hydrogen or an alkyl group having 1 to 6 carbon atoms or together form an aliphatic bridge (CR 5 R 6 ) s , wherein s is a number from 4 to 6 and each of R 5 and R 6 is independently H or an alkyl group having 1 to 6 carbon atoms or a double bond, wherein each of R 5 and R 6 can vary within any one bridge; each of m and p independently is a number from 0 to 3; each of n and q is independently a number from 1 to 4; each of o and r is independently a number from 0 to 20, wherein R 2 , m and p can vary within any one molecule; wherein each of R 7 and R 8 independently H or an alkyl group having 1 to 6 carbon atoms or a multiple bond to the adjacent carbon atom wherein R 7 and R 8 can vary within any one molecule; each of t and w independently a number from 0 to 20 and u is 1, wherein t, u and w can vary within any one molecule, V is H— or CH 3 — when i=1, —(CH 2 ) k — when i=2, wherein k is a number from 2 to 12; —CH 2 —(CH—) l —CH 2 — where i=l+2, wherein l is a number from 1 to 4, HO—CH 2 —(CH—) l —CH 2 — when i=l+1, wherein l is a number from 1 to 4, —(CH 2 ) l —CH(CH 2 —)—(CH 2 ) l — when c=3, wherein l is a number from 1 to 4, or represents any aliphatic, alicyclic or aromatic radical or a radical which comprises both aliphatic and aromatic groups; wherein each of the compounds of formula II, III, IV and V has an average molar mass of below 12,000 D and a 20° C. water solubility of below 100 g per liter and wherein the ratio of the total number of moles of polyol to the total number of moles of polyisocyanate is from 1:1 to 1.5:1.