Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2006-06-13
2006-06-13
Zimmer, Marc S (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S205000
Reexamination Certificate
active
07060779
ABSTRACT:
A process for efficiently producing hydrocarbon/phenol resin having a satisfactory hue through reaction of phenol with an unsaturated cyclic hydrocarbon having two or more carbon—carbon double bonds in the presence of an acid catalyst, which comprises (1) a step in which the molar fraction of ether type reaction products to all the reaction products is regulated to at least 0.1 and (2) a step in which the ether type reaction products yielded by the progress of the reaction is substantially eliminated. The hydrocarbon/phenol resin thus obtained is reacted with an epihalohydrin in the presence of a base catalyst to obtain an epoxy resin having an excellent hue.
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Mori Satoshi
Shimizu Isoo
Hollander Law Firm, P.L.C.
Nippon Petrochemicals Company Limited
Zimmer Marc S
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