| 摘要 |
of the Invention A foam control agent which is free from hydrocarbon oils and comprises (A) an organopolysiloxane with 0 to 60% of units (i) RaSiO wherein R denotes a C8 hydrocarbon group and a is 0-3, and 40 to 100% of units (ii) RbR?SiO wherein R" is -Zz-R' with R' being an C9-35 alkyl, Z is a linking group and z is 0 or 1, b 0, 1 or 2, c 1 or 2 and b+c 1, 2 or 3, provided more than 70% by weight of the carbon content of (A) is due to R", (B) a finely divided hydrophobic particulate material and (C) optionally a MQ organosilicon resin. The agents give improved performance and stability e.g in detergent powders.
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