Foam control composition

Abstract

A process for washing a substrate. The process involves providing a detergent composition that includes a surfactant and an antifoam. The antifoam comprises a hydrophobic fluid having a surface tension of at least 27 mN/m and less than 40 mN/m and a finely divided solid hydrophobic filler dispersed in the hydrophobic fluid. The process further involves washing the substrate in an aqueous medium with the detergent composition. The antifoam does not affect foaming during the washing step. During the washing step, the detergent composition is applied to the substrate. The process further involves rinsing the substrate with the applied detergent composition with water, whereby foaming during the rinsing step is inhibited.

1 - 11 . (canceled) 
     
     
         12 . A detergent composition comprising:
 a surfactant; and   an antifoam comprising;   (A) a hydrophobic fluid having a surface tension of at least 27 mN/m and less than 40 mN/m, and   (B) a finely divided solid hydrophobic filler dispersed in the (A) hydrophobic fluid;   wherein the detergent composition is free of an organosilicon resin; and   wherein the detergent composition is adapted to have foaming in a washing step of a process for washing a substrate and is adapted to have inhibited foaming in a rinsing step of the process for washing a substrate.   
     
     
         13 . The detergent composition of  claim 12 , wherein the (A) hydrophobic fluid is an organopolysiloxane fluid. 
     
     
         14 . The detergent composition of  claim 13 , wherein the organopolysiloxane fluid contains aryl groups. 
     
     
         15 . The detergent composition of  claim 14 , wherein the organopolysiloxane fluid contains phenyl groups. 
     
     
         16 . The detergent composition of  claim 12 , wherein the amount of the (B) finely divided solid hydrophobic filler is 0.5 to 50% by weight based on the (A) hydrophobic fluid. 
     
     
         17 . The detergent composition of  claim 16 , wherein the amount of the (B) finely divided solid hydrophobic filler is 1 to 15% by weight based on the (A) hydrophobic fluid. 
     
     
         18 . The detergent composition of  claim 12 , wherein the (B) finely divided solid hydrophobic filler is hydrophobic silica. 
     
     
         19 . The detergent composition of  claim 12 , wherein the surfactant has a critical micelle concentration of between 0.2 g/L and 0.6 g/L. 
     
     
         20 . The detergent composition of  claim 19 , wherein the washing step is further defined as washing the substrate in an aqueous medium with the detergent composition, the rinsing step is further defined as rinsing the substrate with the applied detergent composition with water, the concentration of the surfactant in the aqueous medium during the washing step is above the critical micelle concentration, and the concentration of the surfactant in the rinse water in the rinsing step is below the critical micelle concentration. 
     
     
         21 . The detergent composition of  claim 12 , wherein the surfactant comprises an anionic surfactant and/or a nonionic surfactant. 
     
     
         22 . The detergent composition of  claim 21 , wherein the surfactant comprises an anionic surfactant. 
     
     
         23 . The detergent composition of  claim 12 , wherein the surfactant is present in an amount of from 5 to 40 wt % of the detergent composition. 
     
     
         24 . The detergent composition of  claim 12 , wherein the detergent composition is a laundry detergent composition. 
     
     
         25 . The detergent composition of  claim 12 , wherein the detergent composition is a personal care composition. 
     
     
         26 . The detergent composition of  claim 25 , wherein the personal care composition is a shampoo, a shower gel, or soap bar. 
     
     
         27 . The detergent composition of  claim 12 , wherein the detergent composition is in powder, liquid or tablet form, or in the form of a solid bar. 
     
     
         28 . The detergent composition of  claim 27 , wherein the detergent composition is in powder form and contains a granulated foam control agent comprising the antifoam supported on a particulate carrier. 
     
     
         29 . A silicone oil-in-water emulsion comprising;
 an antifoam; and   water;   wherein the emulsion is free of an organosilicon resin; and   wherein the antifoam comprises;   (A) a hydrophobic fluid having a surface tension of at least 27 mN/m and less than 40 mN/m, and   (B) a finely divided solid hydrophobic filler dispersed in the (A) hydrophobic fluid.   
     
     
         30 . Foam inhibiting granules comprising:
 an antifoam;   a particulate carrier; and   a binder;   wherein the granules are free of an organosilicon resin; and   wherein the antifoam comprises;   (A) a hydrophobic fluid having a surface tension of at least 27 mN/m and less than 40 mN/m, and   (B) a finely divided solid hydrophobic filler dispersed in the (A) hydrophobic fluid.