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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 10266636 B1

PDFFull Text
Date of Patent:
Apr. 23, 2019

Filed:

Mar. 11, 2015

Process for producing episulfide compound for optical material, episulfide-containing composition, and polymerizable composition for optical material including the same composition

Applicant:

Mitsui Chemicals, Inc., Minato-ku, Tokyo, JP;

Inventors:

Hidetaka Tsukada, Omuta, JP;

Masaru Kawaguchi, Omuta, JP;

Assignee:

MITSUI CHEMICALS, INC., Minato-Ku, Tokyo, JP;

Attorney:

Buchanan, Ingersoll & Rooney PC

Primary Examiner:

David T Karst

Int. Cl.
CPC ...
C08G 18/38 (2006.01); G02B 1/04 (2006.01); C08G 18/73 (2006.01); C08G 18/79 (2006.01); C08G 18/02 (2006.01); B29D 11/00 (2006.01); C08J 5/00 (2006.01); G02C 7/12 (2006.01); C07D 331/02 (2006.01); C08G 18/75 (2006.01); C08L 75/04 (2006.01); C08L 81/00 (2006.01); B29K 75/00 (2006.01); B29K 105/20 (2006.01);
U.S. Cl.
CPC ...
C08G 18/3874 (2013.01); B29D 11/00009 (2013.01); B29D 11/00442 (2013.01); B29D 11/00644 (2013.01); C07D 331/02 (2013.01); C08G 18/022 (2013.01); C08G 18/3876 (2013.01); C08G 18/73 (2013.01); C08G 18/753 (2013.01); C08G 18/758 (2013.01); C08G 18/792 (2013.01); C08J 5/00 (2013.01); G02B 1/04 (2013.01); G02B 1/041 (2013.01); G02C 7/12 (2013.01); B29K 2075/00 (2013.01); B29K 2105/20 (2013.01); B29K 2995/0034 (2013.01); C08J 2375/04 (2013.01); G02C 2202/16 (2013.01);
Abstract

A process for producing an episulfide compound for an optical material of the present invention includes a step of chlorinating glycerin to obtain dichloropropanol; a step of epoxidizing the dichloropropanol to obtain epichlorohydrin; a step of reacting the epichlorohydrin with a sulfating agent to obtain a bis(chlorohydrin) (di)sulfide compound thought a thiol compound; a step of epoxidizing the bis(chlorohydrin) (di)sulfide compound under basic conditions to obtain an epoxy compound; and a step of reacting the epoxy compound with a sulfating agent to obtain an episulfide compound represented by following General Formula (1):

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