Dry cleaning textiles with a composition containing one or more alcohol polyoxyalkylene derivatives and/or one or more benzoate or phenyl alkylcarboxylate esters
Textiles are cleaned by first treating soiled areas of the textile with at least one pre-spotter material which is an alcohol polyoxyalkylene derivative or a benzoate ester. The textiles are subsequently dry cleaned in a medium based on liquid C0 2 , typically also including a cleaning additive, particularly a multi-ester. The textile may also be treated with a fabric conditioner, particularly a fatty alcohol or fatty acid branched polyalkoxylate which may be included in the dry cleaning medium or in a subsequent rinse cycle.
1. A method of dry cleaning, comprising:
i) contacting a textile material with a pre-spotter material, comprising:
(a) one or more alcohol polyoxyalkylene derivatives of formula (I):
R 1 —(OA) m —OR 2 (I)
where
R 1 is a C 1 to C 6 alkyl group;
R 2 is H or a C 1 to C 4 alkyl group;
OA is a random copolymeric chain of oxyethylene and oxypropylene groups; and
m is from 2 to 50; and/or
(b) one or more benzoate esters or phenyl alkylcarboxylate esters; and
ii) subsequently dry cleaning the textiles in a medium based on liquid CO 2 .
2. The method of claim 1 , wherein R 2 is hydrogen.
3. The method of claim 1 , wherein the molar ratio of oxyethylene to oxypropylene groups of from 1:5 to 10:1 and m is from 2 to 20.
4. The method of claim 3 , wherein the random copolymeric chain has a molar ratio of from 1:3 to 3:1.
5. The method of claim 1 , wherein the alcohol polyoxyalkylene derivative is present as a solution or mixture with water.
6. The method of claim 5 , wherein the proportion of water to alcohol alkoxylate is from 50:1 to 1:10 by weight.
7. The method of claim 5 , wherein the alcohol polyoxyalkylene derivative is present as an aqueous solution at a concentration of from 5 to 75% by weight.
8. The method of claim 1 , wherein the benzoate ester or phenyl alkylcarboxylate ester is one or more compounds of the formula (II):
(R 4 ) p -Ph-(CH 2 ) m —COO—R 3 (II)
where
R 3 is a C 1 to C 18 alkyl group;
m is 0, 1 or 2;
Ph is a phenyl group
R 4 is independently a C 1 to C 4 alkyl or alkoxy group; and
p is 0, 1 or 2.
9. The method of claim 8 , wherein the benzoate ester is 2-ethylhexyl benzoate.
10. The method of claim 8 , wherein the benzoate ester is present as an emulsion or microemulsion in water.
11. The method of claim 10 wherein the benzoate ester is present as an aqueous microemulsion and the microemulsion includes a non-ionic surfactant and an anionic surfactant.
12. The method of claim 1 , wherein in the medium based on liquid CO 2 includes one or more cleaning additives which is a multi-ester.
13. The method of claim 12 , wherein the multi-ester is a compound of the formula (III):
R 5 (—C(O)O—R 6 ) n (III)
where
R 5 is a direct bond or the residue of a C 1 to C 10 hydrocarbyl group from which n hydrogen atoms have been removed;
R 6 is a hydrocarbyl group; and
n is from 2 to 5.
14. The method of claim 13 , wherein group R 6 is a C 1 to C 30 hydrocarbyl group.
15. The method of claim 13 , wherein the multi-ester is a di-ester of one or more of succinic, glutaric and adipic acids.
16. The method of claim 13 , wherein the multi-ester is a methyl, ethyl or propyl ester.
17. The method of claim 16 , wherein the multi-ester is a mixture of the di-methyl esters of succinic, glutaric and adipic acids.
18. The method of claim 13 , wherein the multi-ester is a C 6 to C 24 hydrocarbyl ester.
19. The method of claim 13 , wherein the multi-ester is an adipate ester.
20. The method of claim 13 , wherein the multi-ester is, di-(2-ethylhexyl) adipate, di-decyl adipate or di-iso-decyl adipate.
21. The method of claim 1 , wherein the medium based on liquid CO 2 includes one or more fatty alcohol polyalkoxylate or fatty acid polyalkoxylate fabric conditioners.
22. The method of claim 12 , wherein the medium based on liquid CO 2 includes one or more fatty alcohol polyalkoxylate or fatty acid polyalkoxylate fabric conditioners.
23. The method of claim 22 , wherein the fatty alcohol polyalkoxylate is a fatty alcohol polypropoxylate.
24. The method of claim 11 , wherein the non-ionic surfactant is an alcohol alkoxylate, and the anionic surfactant is a sulphosuccinate.
25. The method of claim 13 , wherein group R 5 is —(CH 2 ) m — where m =2 to 6.
26. The method of claim 1 , further comprising rinsing the dry cleaned textiles with a rinse medium based on liquid CO 2 .
27. The method of claim 26 , wherein the rinse medium includes one or more fatty alcohol polyalkoxylate or fatty acid polyalkoxylate fabric conditioners.
28. The method of claim 27 , wherein at least one of the fabric conditioners is a fatty alcohol polypropoxylate.
29. The method of claim 21 , wherein at least one of the fabric conditioners is a fatty alcohol polypropoxylate.