Phosphate-free liquid detergent of high alkalinity

摘要

A detergent concentrate suitable for preparing liquid concentrated stock solutions contains (A) 5 to 20% by weight of nonionic surfactants where (A1) 4 to 20% by weight are alkyl glucosides of the formula R-O-Gx and (A2) 0 to 2% by weight are C12-18-alkyl polyglycol ethers with 5 to 9 ethylene glycol ether groups, (B1) 4 to 20% by weight of sodium hydroxide, (B2) 0.5 to 12% by weight of sodium silicate in Na2O:SiO2 = 1:1 to 1:3.4, (B3) 2 to 12% by weight of sodium nitrilotriacetate and 0 to 3% by weight of at least one phosphonic acid in the form of the sodium salt. In the formula R-O-Gx, R is a C8-14-alkyl radical, G is a glucose residue and the index x is numbers from 1.2 to 5. The total of ingredients (B3) and (B4) is 3 to 12% by weight.