Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
2006-10-31
2006-10-31
Moore, Margaret G. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C524S266000, C524S588000, C524S351000, C524S345000, C524S353000, C524S350000, C252S183120, C556S451000, C106S287140
Reexamination Certificate
active
07129311
ABSTRACT:
An organohydrosiloxane composition comprising:a) one or more organohydrosiloxane compounds, each having at least one [—HSiR—O—] unit, wherein R═C1–C18linear, branched, or cyclic alkyl, C1–C18linear, branched, or cyclic alkoxy, or substituted or unsubstituted aryl, andb) 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 R1through R5can each independently be H, OH, C1–C18linear, branched, or cyclic alkyl, C1–C18linear, 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.
REFERENCES:
patent: 4234441 (1980-11-01), Scott et al.
patent: 5028566 (1991-07-01), Lagendijk
patent: 5118735 (1992-06-01), Burnier
patent: 5470800 (1995-11-01), Muroyama
patent: 6858697 (2005-02-01), Mayorga et al.
patent: 2003/0149213 (2003-08-01), Mayorga et al.
patent: 2004/0039219 (2004-02-01), Chen et al.
patent: 2004/0054114 (2004-03-01), Mayorga et al.
patent: 1321469 (2003-06-01), None
patent: 07145179 (1995-06-01), None
Andreyka Tim S.
Chagolla John L.
Smith Gregory B.
Teff Daniel J.
Arch Specialty Chemicals, Inc.
Moore Margaret G.
Ohlandt Greeley Ruggiero & Perle LLP
LandOfFree
Additives to prevent degradation of alkyl-hydrogen siloxanes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Additives to prevent degradation of alkyl-hydrogen siloxanes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Additives to prevent degradation of alkyl-hydrogen siloxanes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3704859