Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-04-11
2006-04-11
Pezzuto, Helen L. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S333300, C525S333400, C525S333500, C525S343000
Reexamination Certificate
active
07026409
ABSTRACT:
The present invention provides a solid acid catalyst that is excellent from the point of toxicity, environment and others, wherein reaction can be progressed effectively with Bronsted acid or Lewis acid catalyst. For example, the benzoylation reaction of alcohol can also be progressed easily, and further, the catalyst can be recovered and recycled easily. The para position of arylbis(perfluoroalkylsulfonyl)methane represented by the general formula [1] (wherein R1shows a substituted or unsubstituted aryl group, Rf1and Rf2are independent to each other and show a perfluoroalkyl group), a pentafluorophenylbis(perfluoroalkylsulfonyl)methane, for example, is supported on a polystyrene resin, and a polystyrene-supported arylbis(perfluoroalkylsulfonyl)methane represented by the general formula [3] (wherein R3shows a substituted or unsubstituted arylene group, Rf1and Rf2are the same as described above) is obtained.
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Ishihara Kazuaki
Yamamoto Hisashi
Japan Science and Technology Agency
Morgan & Finnegan L.L.P.
Pezzuto Helen L.
Sonnenfeld Kenneth H.
Willis Michael A.
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