Kabushiki Kaisha Toshiba

Toshiba Silicone Co., Ltd.

Japan Field Co., Ltd.

Asahi Breweries, Ltd.

Nobuhiro Saitoh

Minoru Inada

Yasutaka Imajo

Kimiaki Kabuki

Noriaki Yagi

Akitsugu Kurita

Yoshiaki Takezawa

Takayuki Oguni

Hiroshi Shimozawa

Tadayuki Nakamura

Takehisa Shimada

Hideaki Takemoto

Mayumi Koga

Fumihiko Tsuchitani

Masaru Kumagai

Shigeo Yamafuji

A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and l is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained. In addition, to use as a dewatering cleaning agent, the low molecular weight polyorganosiloxane is additionally mixed alone or with a surfactant and/or a hydrophilic solvent. Accordingly, cleaning and water substituting properties equivalent to flon containing dewatering cleaning agents and environmental safety can be obtained.

Cleaning compositions

A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained. In addition, to use as a dewatering cleaning agent, the low molecular weight polyorganosiloxane is additionally mixed alone or with a surfactant and/or a hydrophilic solvent. Accordingly, cleaning and water substituting properties equivalent to flon containing dewatering cleaning agents and environmental safety can be obtained.

An object to be cleaned is cleaned with an cleaning agent which mixes a base cleaning agent such as silicon-containing cleaning agent or an isoparaffin containing cleaning agent with a surfactant or a hydrophilic solvent to promote the cleaning power. The object is rinsed with the base cleaning agent alone after it goes through the first cleaning step as described above. Then, this is followed by the finishing treatment by the use of hot air or steam drying. The base cleaning agents can be recovered and recycled, improving economy in the case with the use of two or more cleaning agents in combination. The excellent properties of degreasing and dewatering, comparable to those of flon system, can be obtained using a mixture of silicon-containing or isoparaffin-containing cleaning agents with surfactants and hydrophilic solvents and maintaining safety in environment.

Cleaning method

Method of cleaning an object including a cleaning step and a vapor

Detergent, method of cleaning, and apparatus for cleaning

Dewatering cleaning method, dewatering cleaning apparatus, and

Method for cleaning an object using an agent that includes a

A continuous method for cleaning and/or removing liquid from industrial parts that includes contacting the part with a cleaning or rinsing composition that contains a straight chain or cyclic polyorganosiloxane.

Continuous method for cleaning industrial parts using a

A method for drying parts that includes contacting the part with a liquid removing composition that contains a straight chain or cyclic polyorganosiloxane.

Method for drying parts using a polyorganosiloxane

A method for removing liquid from parts that includes contacting the part with a cleaning or rinsing composition that contains a straight chain or cyclic polyorganosiloxane.

Method for removing residual liquid from parts using a polyorganosiloxane

A method for cleaning an industrial object by use of an aqueous agent that includes a polyorganosiloxane. The method uses a plurality of vessels and the agent is recovered and resupplied to the method.

Method for cleaning an object with an agent including water and a

Cleaning method and cleaning apparatus

Method of cleaning an object

Growing community of inventors

Ota, Japan

Nobuhiro Saitoh