Defoamer compositions

Details Defoamer compositions Defoamer compositions

2005-07-07

2009-06-23

Kugel, Timothy J. (Department: 1796)

Colloid systems and wetting agents; subcombinations thereof; pro

Compositions containing an agent for breaking ; processes of...

Continuous liquid phase colloid system and discontinuous gas...

C510S349000, C510S466000, C516S123000

Reexamination Certificate

active

07550514

ABSTRACT:
Compositions comprising(A) an organosilicon compound of the formulain-line-formulae description="In-line Formulae" end="lead"?Ra(R1O)bR2cSiO(4-a-b-c)/2  (I)in-line-formulae description="In-line Formulae" end="tail"?in whichR2independently denotes a monovalent, SiC-bonded, optionally substituted, aliphatic cyclic or aliphatic branched hydrocarbon radical having at least 3 carbon atoms, R, and R1are 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),in-line-formulae description="In-line Formulae" end="lead"?R5g(R6O)hSiO(4-g-h)/2in-line-formulae description="In-line Formulae" end="tail"?where R5and R6are 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.

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