Prevention of foam in alkaline cleansing bath by the use of...

Details Prevention of foam in alkaline cleansing bath by the use of... Prevention of foam in alkaline cleansing bath by the use of...

C - Chemistry, Metallurgy

11

D

134/56

C11D 3/20 (2006.01) C11D 1/72 (2006.01) C11D 3/00 (2006.01)

Patent

CA 1157736

A B S T R A C T An alkaline washing composition comprised of strongly alkaline reacting inorganic salts, optionally wetting agents and a defoaming effective amount of at least one mixed formal of an alkylpolyglycol ether having the formula: R1 - O - (CH2CH2O)m - CH2 - (OCH2CH2)n - O - R2 wherein R1 is a straight or branched chain alkyl or alkenyl with from 8 to 22 carbon atoms, R2 is a straight or branched chain alkyl with from 1 to 5 carbon atoms, m is a number from 2 to 30 and n is a number from 1 to 3; as well as the improve- ment in the process of washing rigid solid articles comprising contacting the soiled rigid solid articles with a strongly alkaline washing solution containing a defoaming effective amount of a defoaming agent, rinsing said rigid solid articles and recovering cleaned rigid solid articles, the improvement consisting of using said mixed formal as said defoaming agent. - A -

376613

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