Method for improving the release of a moulded concrete body from the mould

A method for improving the release of a molded concrete body from a mold, comprising applying to the mold an effective amount of an oil-in-water emulsion having a pH of 7.4-10.5 and a viscosity below 40 cp at 40.degree. C. as determined by means of an Emila Viscosimeter, and containing

• 20-80% by weight of water, calculated on the total emulsion;
• 15-75% by weight, calculated on the total emulsion, of an oil component selected from the group consisting of esters of aliphatic carboxylic acids with mono- or dihydric alcohols, the total number of carbon atoms in the esters ranging from 8 to 46 and said esters having melting points below 25.degree. C.;
• 1-12% by weight, calculated on the total emulsion, of at least one non-ionic surfactant having a HLB value of at the most 9.9;
• and
• 1-100% by weight, calculated on the amount of non-ionic surfactant, of at least one anionic surfactant provided a salt selected from the group consisting of sodium, potassium, lithium, ammonium, lower alkylamine, lower alkyl-alkanolamine, and lower alkanolamine salts having up to 8 carbon atoms of phosphate esters and carboxylic acids, or provided as a mixed salt thereof;
• and after application, said oil-in-water emulsion is converted into an oily film or a water-in-oil emulsion.

A method for improving the release of a molded concrete body from a mold, comprising applying to the mold an effective amount of an oil-in-water emulsion having a pH of 7.4-10.5 and a viscosity below 40 cp at 40.degree. C. as determined by an Emila viscosimeter, and containing

• 20-80% by weight of water, calculated on the total emulsion;
• 10-40% by weight, calculated on the total emulsion, of an oily component selected from the group consisting of mineral oils, triglycerides and esters of aliphatic carboxylic acids with mono- or dihydric alcohols, the total number of carbon atoms in the esters ranging from 8 to 46 and said esters having melting points below 25.degree. C.;
• 1-12% by weight, calculated on the total emulsion, of at least one non-ionic surfactant having a HLB value of at the most 9.9;
• and
• 1-100% by weight, calculated on the amount of non-ionic surfactant, of at least one anionic surfactant provided as a salt selected from the group consisting of sodium, potassium, lithium, ammonium, lower alkylamine, lower alkylalkanolamine, and lower alkanolamine salts having up to 8 carbon atoms of phosphate esters and carboxylic acids, or provided as a mixed salt thereof;
• and after application, said oil-in-water emulsion is converted into an oily film or a water-in-oil emulsion.

A method for improving the release of a molded concrete body from a mold, comprising applying to the mold an effective amount of an oil-in-water emulsion having a pH of 7.4-10.5 and a viscosity below 40 cp at 40.degree. C. as determined by means of an Emila Viscosimeter, and containing

• 20-80% by weight of water, calculated on the total emulsion;
• 10-40% by weight, calculated on the total emulsion, of an oil component selected from the group consisting of esters of aliphatic carboxylic acids with mono- or dihydric alcohols, the total number of carbon atoms in the esters ranging from 8 to 46 and said esters having melting points below 25.degree. C.;
• 1-12% by weight, calculated on the total emulsion, of at least one non-ionic surfactant having a HLB value of at the most 9.9;
• and
• 1-100% by weight, calculated on the amount of non-ionic surfactant, of at least one anionic surfactant provided a salt selected from the group consisting of sodium, potassium, lithium, ammonium, lower alkylamine, lower alkyl-alkanolamine, and lower alkanolamine salts having up to 8 carbon atoms of phosphate esters and carboxylic acids, or provided as a mixed salt thereof;
• and after application, said oil-in-water emulsion is converted into an oily film or a water-in-oil emulsion.