Patent attributes
Compositions comprising(A) an organosilicon compound of the formulaRa(R1O)bR2cSiO(4-a-b-c)/2 (I)in whichR2 independently denotes a monovalent, SiC-bonded, optionally substituted, aliphatic cyclic or aliphatic branched hydrocarbon radical having at least 3 carbon atoms, R, and R1 are hydrogen or hydrocarbon radicals, the sum a+b+c≦3, the organosilicon compound has at least one unit of the formula (I) with c other than 0, and in at least 50% of all of the units of the formula (I) in the organosilicon compound the sum a+b+c is 2;at least one additive (B) selected from(B1) filler particles and/or(B2) organopolysiloxane resin(s)and optionally(C) an organosilicon compound which has units of the formula (III),R5g(R6O)hSiO(4-g-h)/2 where R5 and R6 are hydrogen or a hydrocarbon radical, g+h≦3 and in at least 50% of the units (III), g+h=2, are highly effective and long lasting defoamers.
