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.:
Date of Patent:
Jun. 30, 2020
Filed:
Jun. 24, 2016
Applicant:
Mitsui Chemicals, Inc., Minato-ku, Tokyo, JP;
Inventors:
Assignee:
MITSUI CHEMICALS, INC., Minato-Ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 323/52 (2006.01); C07C 319/12 (2006.01); C08G 18/38 (2006.01); G02B 1/04 (2006.01); C07C 31/24 (2006.01); G01N 21/03 (2006.01);
U.S. Cl.
CPC ...
C07C 319/12 (2013.01); C07C 31/245 (2013.01); C07C 323/52 (2013.01); C08G 18/38 (2013.01); C08G 18/3876 (2013.01); G01N 21/0303 (2013.01); G02B 1/04 (2013.01); G02B 1/041 (2013.01);
Abstract
A process for producing a pentaerythritol mercaptocarboxylic acid ester of the present invention includes: a step of reacting pentaerythritol with a mercaptocarboxylic acid, in which an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.07 or less.