Use of water-insoluble polyoxyalkylene-polysiloxane block copolymers for defoaming aqueous media

摘要

The invention relates to the use of water-insoluble polyoxyalkylene-polysiloxane block copolymers of the general average formulawherein the variables and indices are described herein as defoaming agents for aqueous media. This invention also provides for defoaming compositions comprising said water-insoluble polyoxyalkylene-polysiloxane block copolymers as well as coating materials, printing inks and cooling lubricants containing the inventive defoaming compositions.