Antifoaming agents and use thereof in detergents

摘要

Antifoam powders with delayed anti-foaming action, contain
(1) 5 to 35% by weight of an anti-foaming agent which is an amino-functional organopolysiloxane and consists of at least one siloxane unit of the formula;Ra1⁢Qb⁢SiO4-(a+b)2(I)and siloxane units of the general formula;Rc1⁢SiO4-c2(II)
where

Q is an amino group of the general formula
—R2—[NR3—(CH2)m—]xNR4R5  (III)
or forms thereof with partial or full protonation on the nitrogen atoms,
(2) 65 to 95% by weight of a carrier material selected from the group of sodium carbonate, sodium sulphate, aluminium silicate, potassium carbonate, potassium sulphate, sodium hydrogencarbonate, potassium hydrogencarbonate, zeolites, and mixtures thereof.

主权项

1. An anti-suds powder with delayed anti-sudsing action, comprising
(1) 5 to 35% by weight of an anti-sudsing agent which is an amino-functional organopolysiloxane and consists of at least one siloxane unit of the formulaRa1⁢Qb⁢SiO4-(a+b)2(I) and siloxane units of the general formulaRc1⁢SiO4-c2(II) where R1 is the same or different and is a hydrogen atom, a monovalent, optionally fluorine-, chlorine- or bromine-substituted C1- to C18-hydrocarbyl radical or a C1- to C12-alkoxy radical or a hydroxyl radical, Q is an amino group of the formula
—R2—[NR3—(CH2)m—]xNR4R5  (III) or partially or fully protonated forms thereof, and mixtures thereof where R2 is a divalent C1-C18-hydrocarbyl radical, R3 is a hydrogen atom or a C1-C10-alkyl radical, R4 is a hydrogen atom or a C1-C10-alkyl radical, R5 is a hydrogen atom or a C1-C10-alkyl radical, a is 0, 1 or 2, b is 1, 2 or 3, c is 0, 1, 2 or 3, m is 2, 3 or 4, and x is 0, 1 or 2, and the sum of a+b is less than or equal to 3, (2) 65 to 95% by weight of a sodium carbonate, sodium sulphate, aluminium silicate, potassium carbonate, potassium sulphate, sodium hydrogencarbonate, potassium hydrogencarbonate, or zeolite carrier material, with the proviso that the anti-suds powder is free of silicas.