Compositions – Preservative agents – Anti-corrosion
Patent
1989-02-10
1994-02-01
Dean, Ralph H.
Compositions
Preservative agents
Anti-corrosion
252321, 524588, 524501, 524863, B01D 1904
Patent
active
052830047
ABSTRACT:
A defoamer composition is obtained when a mixture of certain siloxane-containing components, a finely divided filler, a reaction catalyst and at least one compound having in each molecule at least 1 group expressed by --COR.sup.5, --COOR.sup.6 or --(OR.sup.7).sub.n -- is heated. R.sup.5 and R.sup.6 are the hydrogen atom or saturated or unsaturated monovalent hydrocarbon groups, R.sup.7 is a divalent hydrocarbon group having two to six carbon atoms, and the average value of n is at least 1. The siloxane-containing components comprise resinous polyorganosiloxanes and typically, polydiorganosiloxanes. The heated mixture is useful for defoaming anionic systems.
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Dean Ralph H.
Dow Corning Corporation
Grindahl George A.
McKellar Robert L.
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