Polymerizable composition for optical material and optical material

Patent metadata

Field	Value
Publication number	US-10081703-B2
Application number	US-201515114232-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 6, 2014
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

Disclosed is a polymerizable composition for an optical material containing polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2); and polythiol (b) having a di- or higher functional thiol group, in which the modified aliphatic polyisocyanate (a2) is contained in the polyisocyanate (a) in the amount of less than or equal to 60 weight %.

First claim

The invention claimed is:

1. A polymerizable composition for an optical material, containing:
polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2); and
polythiol (b) having a di- or higher functional thiol group,
wherein the modified aliphatic polyisocyanate (a2) is contained in the polyisocyanate (a) in the amount of more than or equal to 1 weight % and less than or equal to 60 weight %,
the aliphatic polyisocyanate (a1) and/or the aliphatic polyisocyanate in the modified aliphatic polyisocyanate (a2) is at least one selected from 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,7-heptamethylene diisocyanate, lysine diisocyanate, lysine triisocyanate, dimer acid diisocyanate, octamethylene diisocyanate, and decamethylene diisocyanate,
the modified aliphatic polyisocyanate (a2) is a mononuclear isocyanurate of the aliphatic polyisocyanate, and
the polythiol (b) is polythiol obtained from a plant-derived material, and is at least one selected from 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, and 4,8-, 4,7-, or 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane.

2. The polymerizable composition for an optical material according to claim 1 ,
wherein the aliphatic polyisocyanate (a1) and/or the aliphatic polyisocyanate in the modified aliphatic polyisocyanate (a2) is obtained from a plant-derived material.

3. The polymerizable composition for an optical material according to claim 1 , further containing:
a non-metal catalyst.

4. A molding, containing:
a resin obtained by polymerizing and curing the polymerizable composition for an optical material according to claim 1 .

5. The molding according to claim 4 ,
wherein the resin has a degree of biomass of greater than or equal to 25%.

6. The molding according to claim 4 ,
wherein the molding has a Tg of higher than or equal to 60° C.

7. An optical material formed of the molding according to claim 4 .

8. A plastic spectacle lens formed of the molding according to claim 4 .

9. A plastic polarization lens, comprising:
a polarizing film; and
a layer formed of the molding according to claim 4 , wherein the layer is laminated on at least one surface of the polarizing film.

10. A method for manufacturing a plastic spectacle lens, comprising:
a step of injecting the polymerizable composition for an optical material according to claim 1 which has viscosity at 20° C. of 20 mPa·s to 1000 mPa·s into a lens casting mold; and
a step of polymerizing and curing the polymerizable composition for an optical material.

11. The method for manufacturing a plastic spectacle lens according to claim 10 ,
wherein in the step of injecting the polymerizable composition for an optical material, the viscosity of the polymerizable composition for an optical material at 20° C. is 20 mPa·s to 800 mPa·s.

12. A method for manufacturing a plastic polarization lens, comprising:
a step of fixing a polarizing film into a lens casting mold in a state in which at least one surface of the polarizing film is separated from a mold;
a step of injecting the polymerizable composition for an optical material according to claim 1 which has viscosity at 20° C. of 20 mPa·s to 1000 mPa·s into a gap between the polarizing film and the mold; and
a step of laminating a layer formed of a polythiourethane resin on at least one surface of the polarizing film by polymerizing and curing the polymerizable composition for an optical material.

13. The method for manufacturing a plastic polarization lens according to claim 12 ,
wherein in the step of injecting the polymerizable composition for an optical material, the viscosity of the polymerizable composition for an optical material at 20° C. is 20 mPa·s to 800 mPa·s.

Assignees

• Mitsui Chemicals Inc

Inventors

• Tsukada Hidetaka
• Ito Shinsuke
• Kakinuma Naoyuki
• Goto Kenichi
• Nakagawa Toshihiko
• Yamasaki Satoshi

Classifications

• C08K5/37

  Thiols · CPC title

• G02B1/041

  Lenses · CPC title

• C08G18/722 Primary

  Combination of two or more aliphatic and/or cycloaliphatic polyisocyanates · CPC title

• C08G18/244

  tin salts of carboxylic acids · CPC title

• B29C45/0053

  combined with a final operation, e.g. shaping (injection-compression moulding B29C45/561) · CPC title