Method for producing polythiol compound, method for producing curable composition, and method for producing cured product

Patent metadata

Field	Value
Publication number	US-2018362699-A1
Application number	US-201816015670-A
Country	US
Kind code	A1
Filing date	Jun 22, 2018
Priority date	Aug 5, 2016
Publication date	Dec 20, 2018
Grant date	—

Abstract

Provided is a method for producing a polythiol compound, including reacting 2-mercaptoethanol with an epihalohydrin, wherein the reaction is carried out in the presence of a halide selected from the group consisting of a 2,3-dihalogeno-1-propanol and an allyl halide, and an amount of the halide in the reaction is more than 0.50% by mass and 10.00% by mass or less with respect to the total amount of the halide and the epihalohydrin. Also provided are a method for producing a curable composition, including producing a polythiol compound by the abovementioned production method, and a method for producing a cured product, including producing a curable composition by the abovementioned production method.

First claim

What is claimed is:

1 . A method for producing a polythiol compound, comprising reacting 2-mercaptoethanol with an epihalohydrin, wherein
the reaction is carried out in the presence of a halide selected from the group consisting of a 2,3-dihalogeno-1-propanol and an allyl halide, and an amount of the halide in the reaction is more than 0.50% by mass and 10.00% by mass or less with respect to the total amount of the halide and the epihalohydrin.

2 . The method for producing a polythiol compound according to claim 1 , wherein one or more polythiol compounds selected from the group consisting of a polythiol compound represented by Formula (3) below, a polythiol compound represented by Formula (4) below, and a polythiol compound represented by Formula (5) below is produced.

3 . The method for producing a polythiol compound according to claim 1 , wherein a polythiol compound represented by Formula (7) below is produced.

4 . A method for producing a curable composition, comprising:
producing a polythiol compound by the production method according to claim 1 ; and mixing the produced polythiol compound with a polyiso(thio)cyanate compound to prepare a curable composition.

5 . A method for producing a cured product, comprising:
producing a curable composition by the production method according to claim 4 ; and curing the produced curable composition to obtain a cured product.

6 . The method for producing a cured product according to claim 5 , wherein
the curing is carried out by subjecting the curable composition to cast polymerization.

7 . The method for producing a cured product according to claim 5 , wherein
the cured product is a spectacle lens base material.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Kageyama Yukio
• Kousaka Masahisa
• Ohnishi Tomofumi

Classifications

• C07C319/14

  of sulfides · CPC title

• C08G18/7642

  containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring · CPC title

• G02B1/041

  Lenses · CPC title

• C08G18/3876 Primary

  containing mercapto groups · CPC title

• C07C321/14

  of an acyclic saturated carbon skeleton · CPC title