Sizing methods and compositions for carbon dioxide dry cleaning
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United States of America Patent
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Aug 28, 2001
Grant Date -
N/A
app pub date -
Jul 21, 1999
filing date -
Jul 21, 1999
priority date (Note) -
Expired
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Abstract
A method for dry-cleaning articles such as fabrics and clothing in carbon dioxide while concurrently applying a sizing agent to the articles 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, a surfactant, a sizing agent. An organic co-solvent is preferably included. After the contacting step, the article is separated from the liquid dry cleaning composition. The method is preferably carried out at ambient temperature. Preferred sizing agents are low molecular weight hydrocarbon resins. The surfactant is preferably one that does not contain a CO.sub.2 -philic group. The organic co-solvent is preferably an alkane and has a flash point above 140.degree. F.
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