Ansai
Ryuichi Ansai, Hiroshima JP
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20110137072 | METHOD FOR PRODUCING (METH)ACRYLIC ANHYDRIDE, METHOD FOR STORING (METH)ACRYLIC ANHYDRIDE, AND METHOD FOR PRODUCING (METH)ACRYLATE - It is an object of the present invention to provide a method for producing (meth)acrylic anhydride that provides high yield and high efficiency and can suppress side reactions, in a method for reacting (meth)acrylic acid with a fatty acid anhydride to produce (meth)acrylic anhydride. The method for producing (meth)acrylic anhydride according to the present invention is a method for producing (meth)acrylic anhydride, including reacting a fatty acid anhydride with (meth)acrylic acid to produce (meth)acrylic anhydride, while extracting a fatty acid produced as a by-product, wherein the reaction is performed, while adjustment is performed so that a molar ratio of the (meth)acrylic acid to the (meth)acrylic anhydride in a reaction liquid is 0.3 or more. | 06-09-2011 |
20110301379 | METHOD FOR PRODUCING A (METH)ACRYLATE - Disclosed is a method for producing a (meth)acrylate ester wherein a high purity (meth)acrylate ester is obtained with a high yield, with a reduced loss of (meth)acrylic acid anhydride. In the method, (meth)acrylic acid is recovered with a high yield, and the (meth)acrylate ester is purified easily. Specifically disclosed is a method for producing a (meth)acrylate ester which comprises: (1) a step of producing (meth)acrylic acid anhydride by reacting a specific fatty acid anhydride and (meth)acrylic acid, while removing a by-produced fatty acid; (2) a step of obtaining a (meth)acrylate ester by reacting an alcohol and unpurified (meth)acrylic acid anhydride obtained in step (1) preferably at a temperature not less than 90° C.; and (3) a step of recovering (meth)acrylic acid by distillation preferably at a temperature not less than 90° C. The method may also comprise a step of heating or distilling the reaction liquid obtained in step (2) at a temperature not less than 90° C. | 12-08-2011 |
Ryuichi Ansai, Toyohashi-Shi JP
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20130286146 | PLASTIC ROD LENS, PLASTIC ROD LENS ARRAY, COLOR IMAGE SENSOR HEAD, AND LED PRINTER HEAD - A transparent plastic rod lens which has a cylindrical shape with a radius r in which a refractive index n | 10-31-2013 |
Ryuichi Ansai, Otake-Shi JP
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20140005435 | METHOD FOR PRODUCING (METH)ACRYLIC ANHYDRIDE, METHOD FOR STORING (METH)ACRYLIC ANHYDRIDE, AND METHOD FOR PRODUCING (METH)ACRYLATE | 01-02-2014 |
Ryuichi Ansai, Yokohama-Shi JP
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20140371412 | RESIST COPOLYMER AND RESIST COMPOSITION - Provided is a resist copolymer which has favorable sensitivity, enables a resist pattern to be formed to have a favorable shape, has favorable dry etching resistance when a dry etching is carried out using the resist pattern as a mask, and suppresses the surface roughness of a pattern formed by carrying out a dry etching process to a substrate. | 12-18-2014 |