Alkyl glycidyl ether-capped diamine foam controlling agent

In a method for controlling the foaming in an industrial process which is an oil well production, acid gas scrubbing, food processing, pulp or paper processing, fermentation, metal treatment, polymer or chemical synthesis, waste-water treatment, or textile dyeing or finishing process employing a waterborne composition by the incorporation of a foam controling agent in an amount effective for controlling foam, the improvement which comprises employing as the foam controlling agent an alkyl glycidyl ether-capped diamnine compound of the formula:

• where L is a linker group comprising a linear, branched, or cyclic alkyl group having from 2 to about 6 carbon atoms or an alkyl ether group having from about 4 to about 0 carbon atoms;
• R is independently selected from hydrogen or —CH2CHOHCH2OR′;
• and R′ is an akyl group haying from about 4 to about 22 carbon atoms;
• the compound generating an initial foam height at least 30% less than a 0.1 wt% aqueous solution of dioctyl sodium sulfosuccinate (DOSS), when added at 0.1 wt % to the aqueous DOSS solution.

An aqueous composition comprising a foam controlling agent, which composition is a protective or decorative coating;

• an ink composition;
• an adhesive composition;
• an overprint varnish;
• a radiation cured coating, ink, overprint varnish, or adhesive composition:
• an agricultural composition, or an acid gas scrubbing composition and manifests greater foaming in the absence of the foam controlling agent, wherein the foam controlling agent is an alkyl glycidyl ether-capped diamine foam control agent present in an amount effective for controlling foam and has the formula:
• where L is a linker group comprising a linear, branched, or cyclic alkyl group having from 2 to about 6 catbon atoms or an alkyl ether group having from about 4 about 8 carbon atoms;
• R is —Ch2CHOHCH2OR′;
• and R′ is an alkyl group having from about 4 to about 22 carbon atoms;
• the compound generating an initial foam height at least 30% less than a 0.1 wt % aqueous solutin of dioctyl sodium mifocuccinate DOSS), when added at 0.1 wt% to the aqueous DOSS solution.