Additives to prevent degradation of alkyl-hydrogen siloxanes

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United States of America Patent

APP PUB NO 20060159861A1
SERIAL NO

11361723

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Abstract

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An organohydrosiloxane composition comprising: a) one or more organohydrosiloxane compounds, each having at least one [--HSiR-O--] unit, wherein R.dbd.C.sub.1-C.sub.18 linear, branched, or cyclic alkyl, C.sub.1-C.sub.18 linear, branched, or cyclic alkoxy, or substituted or unsubstituted aryl, and b) an antioxidant compound shown in Formula (1) wherein the antioxidant compound is a phenolic compound and is present in a concentration from about 1 ppm to about 5,000 ppm and wherein R.sup.1 through R.sup.5 can each independently be H, OH, C.sub.1-C.sub.18 linear, branched, or cyclic alkyl, C.sub.1-C.sub.18 linear, branched, or cyclic alkoxy or substituted or unsubstituted aryl. The compositions of present invention exhibit stability and significantly extend the shelf life of organohydrosiloxane products and allow greater flexibility in handling these products in chemical processes or semiconductor manufacturing. The resulting stabilization of siloxanes prevents the possibility of complete polymerization (i.e., solidification) of product in chemical delivery lines or valves, which lowers equipment maintenance and costs and reduces time the machinery is out of production.

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Patent Owner(s)

Patent OwnerAddress
FUJIFILM ELECTRONIC MATERIALS U S A INC80 CIRCUIT DRIVE NORTH KINGSTOWN RI 02852

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Andreyka, Tim S Gold Canyon, AZ 3 59
Chagolla, John L Mesa, AZ 8 81
Smith, Gregory B Gilbert, AZ 7 146
Teff, Daniel J Chandler, AZ 8 81

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