Hydroxyalkyl (meth)acrylate and its production process

Details Hydroxyalkyl (meth)acrylate and its production process Hydroxyalkyl (meth)acrylate and its production process

2007-05-08

2007-05-08

Puttlitz, Karl (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S183000

Reexamination Certificate

active

10436662

ABSTRACT:
The present invention provides: a high-quality hydroxyalkyl (meth)acrylate of which the alkylene glycol di(meth)acrylate content and the acid component content are both low; and its novel production process. The hydroxyalkyl (meth)acrylate, which has a content, in terms of an alkylene glycol di(meth)acrylate as an impurity, of not more than 0.1 weight % and an acid component content of not more than 0.1 weight %, is obtained by a process comprising 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 process making an adjustment as to charging of both raw materials in such a manner that, for, of a time as needed for supplying both raw materials, a supplying time of not less than 40% of a total supplying time when the raw materials as supplied have a temperature of not lower than 40° C., the molar ratio of the integrated amount of the alkylene oxide to the integrated amount of the (meth)acrylic acid that have been added to a reactor by then can be more than 1.0.

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