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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8148567 B1

PDFFull Text
Expired
Date of Patent:
Apr. 03, 2012

Filed:

Mar. 12, 2009

Process for producing urethane (meth)acrylate

Applicants:

Fumihiko Ishiyama, Sakura, JP;

Takeshi Hizawa, Sakura, JP;

Hideki Watanabe, Ichihara, JP;

Inventors:

Fumihiko Ishiyama, Sakura, JP;

Takeshi Hizawa, Sakura, JP;

Hideki Watanabe, Ichihara, JP;

Assignee:

DIC Corporation, Tokyo, JP;

Attorneys:

Edwards Wildman Palmer LLP

James E. Armstrong, IV

Junko Harada

Primary Examiner:

Sudhakar Katakam

Int. Cl.
CPC ...
C07C 269/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An object of the present invention is to provide a process for producing a urethane (meth)acrylate safely with good productivity, and for achieving the object, the invention provides a process for continuously producing a urethane (meth)acrylate, containing causing a mixed liquid of a compound (A) having a hydroxyl group and a (meth)acryloyl group and a compound (B) having an isocyanate group to pass continuously and densely through a tubular microchannel formed in a heat-conducting reaction device, and reacting the hydroxyl group of the compound (A) with the isocyanate group of the compound (B), in which the tubular microchannel in the reaction device has a space size making a fluid cross-sectional area, through which the mixed liquid passes densely, of from 0.1 to 4.0 mm, and the process contains heating the heat-conducting reaction device to a temperature of from 100 to 250° C., reacting the mixed liquid to provide a Reynolds number of a reaction liquid passing through the tubular microchannel in a range of from 0.2 to 300, and after completing reaction, cooling continuously a reaction product discharged from the heat-conducting reaction device.

Find Patent Forward Citations

Ishiyama, Fumihiko. (2012). Process for producing urethane (meth)acrylate (U.S. Patent No. 8148567). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8148567

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