Laminated body for optical purposes that includes a melanin-containing layer and an optical product which includes the laminate

• US 20090323179A1
• Filed: 02/26/2007
• Published: 12/31/2009
• Est. Priority Date: 02/24/2006
• Status: Active Grant

• Current Assignee: MGC Filsheet Co., Ltd
• Original Assignee: MGC Filsheet Co., Ltd
• Inventors: Aoki, Yoshiyuki, Kawai, Ryozo, Namiki, Masahiko, Miura, Mitsuo, Aoki, Eiko
• Granted Patent: US 7,872,795 B2
• Time in Patent Office: Days
• US Class Current: 359/359
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2307/40 having particular optical properties light or UV resistant B32B2307/71
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/306 comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/365 comprising polycarbonates
• CPC Class Codes: B32B 27/40 comprising polyurethanes
• CPC Class Codes: C08F 220/281 and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/6446 Proteins and derivatives thereof
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 33/10 Homopolymers or copolymers of methacrylic acid esters
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: G02B 1/04 made of organic materials, e.g. plastics G02B1/08 takes precedence
• CPC Class Codes: G02B 5/23 : Photochromic filters
• CPC Class Codes: G02B 5/3033 : in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: G02C 2202/16 : Laminated or compound lenses
• CPC Class Codes: G02C 7/102 : Photochromic filters
• CPC Class Codes: G02C 7/108 : Colouring materials
• CPC Class Codes: G02C 7/12 : Polarisers

Abstract

A laminated body of the present invention includes a melanin-containing layer, wherein the melanin-containing layer is formed by curing a composition that includes at least a melanin, a polymerizable monomer, and a urethane-derived composition. The composition for the laminated body of the present invention is used for producing the laminated body and includes at least a melanin, a polymerizable monomer, and a urethane-derived composition. The optical product of the present invention is formed including the laminated body.

Claims

1. A laminated body for optical purposes comprising a melanin-containing layer, wherein said melanin layer is formed by curing a composition that comprises melanin, a polymerizable monomer, and a urethane-derived composition.

2. A laminated body for optical purposes according to claim 1, wherein the content of the melanin of the melanin layer is 1.5% or more by weight.

3. A laminated body for optical purposes according to claim 1 or 2, wherein said melanin is any one selected from the group consisting of an eumelanin, a pheomelanin, and an allomelanin.

4. A laminated body for optical purposes according to any one of claims 1-3, wherein said polymerizable monomer is a (meth)acrylate ester or an acroyl monomer.

5. A laminated body for optical purposes according to claim 4, wherein said (meth)acrylate ester is at least any one selected from the group consisting of a tetrahydrofuryl (meth)acrylate, a glycidyl (meth)acrylate, a 3-hydroxypropyl (meth)acrylate, and a 2-hydroxypropyl (meth)acrylate.

6. A laminated body for optical purposes according to claim 4, wherein said acroyl monomer is N-acroylmorphorine or N-acroyl-2-pyrrolydone or both.

7. A laminated body for optical purposes according to any one of claims 1-6, wherein the urethane-derived composition is a thermal-curable composition that consists of a polyurethane polymer and a curing agent.

8. A laminated body for optical purposes according to any one of claims 1-7 that consists of a melanin layer, and two transparent resin layers between which the melanin layer is held.

9. A laminated body for optical purposes according to any one of claims 1-7 that consists of a polarizing film, a melanin layer and a photochromic layer between which the polarizing film is held, and two transparent resin layers between which the melanin layer and the photochromic are held.

10. A laminated body for optical purposes according to claim 8 or 9, wherein the transparent resin layers are at least one selected from the group consisting of a polycarbonate resin, a cellulose resin, an alicyclic polyolefin resin, and a polyester resin.

11. A laminated body for optical purposes according to claim 8 or 9, wherein the transparent resin layers are polycarbonate resins.

12. A composition for producing the laminated body for optical purposes according to any one of claims 1-11, wherein the composition comprises at least one of melanin, a polymerizable monomer, and a urethane composition.

13. A composition for producing the laminated body for optical purposes according to claim 12, wherein the melanin is any one selected from the group consisting of an eumelanin, a pheomelanin, and an allomelanin.

14. A composition for producing the laminated body for optical purposes according to claim 12 or 13, wherein the polymerizable monomer is a (meth)acrylic acid ester or an acroyl monomer.

15. A composition for producing the laminated body for optical purposes according to claim 12 or 14, wherein the urethane composition is a thermal curable composition which consists of a polyurethane polymer and a curing agent.

16. A melanin-containing optical product wherein it is formed so that it includes the laminated body for optical purposes of any one of claims 1-11.

17. A melanin-containing optical product according to claim 16 that is any one selected from the group consisting of a polarizing lens, a polarizing plate, sunglasses, goggles, glass for automobiles, window glass, and a sunvisor.