Dry cleaning methods and compositions

Details Dry cleaning methods and compositions Dry cleaning methods and compositions

D - Textiles, Paper

06

L

8/118, 134/31

D06L 1/00 (2006.01) C11D 1/00 (2006.01) D06L 1/02 (2006.01) D06L 1/04 (2006.01) D06L 1/12 (2006.01)

Patent

CA 2301636

A method for dry-cleaning articles such as fabrics and clothing in carbon dioxide comprises contacting an article to be cleaned with a liquid dry cleaning composition for a time sufficient to clean the fabric. The liquid dry- cleaning composition comprises a mixture of carbon dioxide, water, a surfactant, and an organic co-solvent. After the contacting step, the article is separated from the liquid dry cleaning composition. The method is preferably carried out at ambient temperature. The surfactant is preferably one that does not contain a CO2-philic group. The organic co-solvent is preferably an alkane and has a flash point above 140 ~F.

L'invention concerne un procédé pour le nettoyage à sec, sous dioxyde de carbone, d'articles comme les tissus et les vêtements. On met en contact l'article à nettoyer avec une composition liquide de nettoyage à sec, pendant une durée suffisante pour le nettoyage du tissu. Ladite composition est à base de mélange qui renferme du dioxyde de carbone, de l'eau, un tensioactif, et un cosolvant organique. Après la phase de mise en contact, l'article est séparé de la composition considérée. De préférence, on conduit le procédé à température ambiante et, de préférence, le tensioactif est dépourvu de groupe CO¿2?-phile. De préférence, le cosolvant organique est un alcane, et il possède un point d'éclair supérieur à 140· F.

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