Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2006-05-16
2006-05-16
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S209000
Reexamination Certificate
active
07045651
ABSTRACT:
The present invention provides a novel production process for a hydroxyalkyl (meth)acrylate, in which it is possible that: in a batch reaction system, the amount of the hydroxyalkyl (meth)acrylate (which is the objective product) as produced is kept nearly on the same level as conventional and further, at the same time, there is suppressed the side production of the alkylene oxide's diaddition product (dialkylene glycol mono(meth)acrylate) that lowers the purity of the product to thus give a bad influence upon its quality. The present invention production process comprises the step of carrying out a batch reaction between (meth)acrylic acid and an alkylene oxide in the presence of a catalyst in order to produce the hydroxyalkyl (meth)acrylate; with the production process being characterized by arranging that the reaction should be initiated in a state of a catalyst concentration of more than 1, wherein the catalyst concentration is defined as the amount of the catalyst as used relative to the integrated amount of the (meth)acrylic acid as supplied and is assumed to be 1 in terms of the amount of the entire catalyst to be used relative to the amount of the entire (meth)acrylic acid to be supplied.
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Ishida Tokumasa
Uemura Masahiro
Nippon Shokubai Co. , Ltd.
Oh Taylor Victor
Tsang Cecilia J.
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