Lyondell Chemical Technology, L.p.

Paul E Galick

Larry W Arndt

Ellen S Lenz

David R Kinney

Shao-Hua Guo

Frank J Liotta, Jr

Jude T Ruszkay

Mark A Liepa

A drycleaning method is disclosed. The method uses a composition comprising 30 to 90 wt. % of a dipropylene glycol C-Calkyl ether, 5 to 65 wt. % of one or more C-Chydrocarbons, and 1 to 10 wt. % of water. The method combines acceptable stain removal with faster-than-expected evaporability, particularly at the elevated temperatures used in commercial drycleaning.

Drycleaning method

A drycleaning method is disclosed. In the method, a composition that comprises at least about 85 wt. % dipropylene glycol dimethyl ether (DMM) is used. The limited solubility of water in DMM is ideal for drycleaning. The method provides good stain removal and fast drying while avoiding excessive fabric shrinkage or soil redeposition.

Drycleaning method using dipropylene glycol dimethyl ether

A drycleaning method is disclosed. In the method, a composition that comprises dipropylene glycol n-propyl ether (DPnP) and is essentially free of siloxanes or polysulfonic acids is used. The composition contains at least about 80 wt. % DPnP and up to about 15 wt. % of water. The method enables superior stain removal while avoiding excessive fabric shrinkage or soil redeposition.

Drycleaning method using dipropylene glycol n-propyl ether

The color of organic carbonate such as ethylene carbonate or propylene carbonate is substantially improved by ultraviolet irradiation.

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West Chester, PA, United States of America

Paul E Galick