| 摘要 |
The invention relates to new antifoaming powders having delayed antifoaming effect, containing (1) 5 to 35 wt% of an antifoaming agent, which is an aminofunctional organopolysiloxane and comprises at least one siloxane unit of general formula (I) and siloxane units of general formula (II), where R1 is the same or different and stands for a hydrogen atom, a monovalent, optionally fluorine-, chlorine-, or bromine-substituted C1 to C18 hydrocarbon group, a C1 to C12 alkoxy group, or a hydroxy group, Q stands for an amino group of the general formula -R2-[NR3-(CH2)m-]xNR4R5 (III) or forms thereof partially or completely protonated at the nitrogen atoms, where R2 stands for a bivalent C1-C18 hydrocarbon group, R3, R4, and R5 stand for a hydrogen atom or a C1-C10 alkyl group independently of each other, a stands for 0, 1, or 2, b stands for 1, 2, or 3, c stands for 0, 1, 2, or 3, m stands for 2, 3, or 4, and x stands for 0, 1, or 2, and the sum a+b is <= 3, and (2) 65 to 95 wt% of a carrier material selected from the group of sodium carbonate, aluminosilicate, potassium carbonate, potassium sulfate, sodium hydrogen carbonate, potassium hydrogen carbonate, and zeolites and mixtures thereof. The invention also relates to the use of the antifoaming agents or powders thereof in detergents. |
