| abstract |
A phosphate-free powdered laundry detergent having cleaning ability comparable to a detergent containing super phosphate comprises: (A) 1-30% by weight of a surfactant, (B) 1-50% by weight of sodium aluminum silicate detergent builder, (C) 1-20% by weight sodium silicate, (D) 0.1-5% by weight anti-redeposition agent, and ( E) 10 to 80% by weight of an inorganic filler, the surfactant consisting of (1) a mixture of 20 to 98% by weight of an ethoxylated fatty alcohol, 1 to 75% by weight of a metal alkali metal or ammonium salt of an alkyl benzene sulfonate in which the alkyl group contains 10 to 18 carbon atoms, and 1 to 20% by weight of an amine oxide corresponding to the formula RR'R ''NO where R is a primary alkyl group containing 8 to 24 carbon atoms; R' is methyl, ethyl or 2-hydroxy-ethyl; and R'' is independently selected from methyl, ethyl, 2-hydroxyethyl, and primary alkyl containing 8 to 24 carbon atoms, or (2) a mixture of 85 to 98% by weight ethoxylate, 1 to 12% by weight of a fatty acid soap, and 1 to 6% by weight of amine oxide. |