초록 ▼

Water based defoamer compositions which are invert (water in oil) emulsions containing quick-chilled amides, hydrophobic silica, polymers, emulsifiers, oil and water are useful in defoaming aqueous systems such as found in the kraft pulping process. Optionally, these defoamer compositions may contai

Water based defoamer compositions which are invert (water in oil) emulsions containing quick-chilled amides, hydrophobic silica, polymers, emulsifiers, oil and water are useful in defoaming aqueous systems such as found in the kraft pulping process. Optionally, these defoamer compositions may contain silicone surfactants, formaldehyde solution and silicone oil.

대표청구항 ▼

A water in oil emulsion defoamer composition comprising: (a) from about 0.5 to about 10 percent by weight of quick-chilled amide, which is a reaction product of a polyamide having at least one alkylene group of 2 to 10 carbon atoms and a fatty acid of from 6 to 18 carbon atoms, (b) from about 0.3 to

A water in oil emulsion defoamer composition comprising: (a) from about 0.5 to about 10 percent by weight of quick-chilled amide, which is a reaction product of a polyamide having at least one alkylene group of 2 to 10 carbon atoms and a fatty acid of from 6 to 18 carbon atoms, (b) from about 0.3 to about 10 percent by weight of hydrophobic silica (c) from about 0.5 to about 5 percent by weight of polymer selected from the group consisting of copolymer of vinyl acetate and fumaric acid esterified with tallow alcohol, copolymer of vinyl acetate with maleic acid esters, copolymer of vinyl acetate with ethylene, copolymer of vinyl acetate with propylene, copolymer of vinyl acetate with butylene, methyl glucoside alkoxylated with four moles of propylene oxide, glycerine alkoxylated with fifteen moles of ethylene oxide and forty-five moles of propylene oxide, butanol alkoxylated with thirty moles of propylene oxide, copolymer of lauryl methacrylate and vinyl pyrrolidone, methacrylate copolymer dissolved in refined oil, blown hydrogenated soya oil, blown vegetable oil, blown castor oil, soya alkyd, phenol modified coumarone indene resin, glycerol ester of gum rosin, glycerine ester of polyvinylpyrrolidone, lauric acid, palmitic acid, stearic acid, linseed oil, castor oil, lard and tallow, (d) from about 0.5 to about 5 percent by weight of emulsifier selected from the group consisting of nonionic, anionic acid cationic surfactants, (e) from about 15 to about 65 percent by weight of oil, (f) from about 20 to about 60 percent by weight of water, (g) from about 0 to about 3 percent by weight of silicone surfactant, (h) from about 0 to about 0.5 percent by weight of formaldehyde solution and (i) from about 0 to about 0.5 percent by weight of silicone oil. The process of defoaming an aqueous system comprising adding a foam controlling amount of the defoamer composition of claim 1 to the aqueous system.