Two-step cleaning or dewatering with siloxane azeotropes

Details Two-step cleaning or dewatering with siloxane azeotropes Two-step cleaning or dewatering with siloxane azeotropes

C - Chemistry, Metallurgy

11

D

C11D 7/50 (2006.01) B01D 12/00 (2006.01) C11D 3/43 (2006.01) C23G 5/02 (2006.01) C11D 7/26 (2006.01)

Patent

CA 2150405

A process for cleaning or dewatering a surface is described in which there is applied to the surface a washing composition containing a volatile methyl siloxane such as hexamethyldisiloxane or octamethyltrisiloxane and an agent for enhancing cleaning or dewatering such as a glycol ether or surface active agent. While the surface is still wet with the washing composition, it is rinsed with an azeotrope containing hexamethyldisiloxane or octamethyltrisiloxane and 2-pentanol, 2-methyl-1-pentanol, 3-methyl-3-pentanol, 1- methoxy-2-propanol, 1-butoxy-2-propanol, 1-hexanol, n- propoxypropanol or ethyl lactate. The surface is then dried or permitted to dry.

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