Dry cleaning system using densified carbon dioxide and a surfact

Details Dry cleaning system using densified carbon dioxide and a surfact Dry cleaning system using densified carbon dioxide and a surfact

1999-09-02

2000-10-17

Del Cotto, Gregory R.

Textiles: fluid treating apparatus

Machines

Combined

8142, 510288, 510289, 510291, 510466, 510467, 510470, 510488, 510492, 510499, 510505, 510506, D06F 4302, C11D 172, C11D 1722, C11D 182, C11D 316

Patent

active

061314218

ABSTRACT:
A system for dry cleaning soils from fabrics comprising densified carbon dioxide and a surfactant in the densified CO.sub.2. The densified carbon dioxide is in a temperature range of about -78.5.degree. C. to about 100.degree. C. and a pressure range of about 14.7 to about 10,000 psi. At least 0.1% by volume of a modifier is preferably present. The surfactant has a polysiloxane, a branched polyalkylene oxide or a halocarbon group which is a functional CO.sub.2 -philic moiety connected to a CO.sub.2 -phobic functional moiety. The surfactant either exhibits an HLB of less than 15 or has a ratio of siloxyl to substituted siloxyl groups of greater than 0.5:1.

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