Organo-modified siloxanes, antifoams

An overview is presented of antifoam chemistry from Degussa and its application to the production and formulation of organo-modified siloxane anti-foaming agents for polyvinyl chloride. 7 refs. 

Whereas organic oils do sometimes not perform effectively but usually show good compatibility, filled silicone oils are highly active but very incompatible and tend to separate from the bulk or induce faults such as craters in paints and inks. Antifoams based on organo-modified siloxanes can surpass traditional formulations in performance because they combine excellent activity with good compatibility (Fig. 20). 

Chem. Descrip. Organo-modified siloxane-based emulsion Uses Antifoam... 

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