WO2015088013A1 - 光学材料用重合性組成物、光学材料及びその製造方法 - Google Patents
光学材料用重合性組成物、光学材料及びその製造方法 Download PDFInfo
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- WO2015088013A1 WO2015088013A1 PCT/JP2014/083014 JP2014083014W WO2015088013A1 WO 2015088013 A1 WO2015088013 A1 WO 2015088013A1 JP 2014083014 W JP2014083014 W JP 2014083014W WO 2015088013 A1 WO2015088013 A1 WO 2015088013A1
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- optical material
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- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- AAPAGLBSROJFGM-UHFFFAOYSA-N naphthalene-1,5-dithiol Chemical compound C1=CC=C2C(S)=CC=CC2=C1S AAPAGLBSROJFGM-UHFFFAOYSA-N 0.000 description 1
- XMHBJPKFTZSWRJ-UHFFFAOYSA-N naphthalene-2,6-dithiol Chemical compound C1=C(S)C=CC2=CC(S)=CC=C21 XMHBJPKFTZSWRJ-UHFFFAOYSA-N 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- UWHMFGKZAYHMDJ-UHFFFAOYSA-N propane-1,2,3-trithiol Chemical compound SCC(S)CS UWHMFGKZAYHMDJ-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 210000001116 retinal neuron Anatomy 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- WTSBJMAOQNCZBF-UHFFFAOYSA-N sulfanylmethylsulfanylmethanethiol Chemical compound SCSCS WTSBJMAOQNCZBF-UHFFFAOYSA-N 0.000 description 1
- QNITWMBGUWZSSI-UHFFFAOYSA-N sulfanylmethylsulfanylmethylsulfanylmethanethiol Chemical compound SCSCSCS QNITWMBGUWZSSI-UHFFFAOYSA-N 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- UVZICZIVKIMRNE-UHFFFAOYSA-N thiodiacetic acid Chemical compound OC(=O)CSCC(O)=O UVZICZIVKIMRNE-UHFFFAOYSA-N 0.000 description 1
- 235000019303 thiodipropionic acid Nutrition 0.000 description 1
- 125000005068 thioepoxy group Chemical group S(O*)* 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- TWXMZYPORGXIFB-UHFFFAOYSA-N thiophene-3,4-dithiol Chemical compound SC1=CSC=C1S TWXMZYPORGXIFB-UHFFFAOYSA-N 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/108—Colouring materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
- C08G18/3876—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur containing mercapto groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/722—Combination of two or more aliphatic and/or cycloaliphatic polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3472—Five-membered rings
- C08K5/3475—Five-membered rings condensed with carbocyclic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection
Definitions
- the present invention relates to a polymerizable composition for an optical material that gives a polythiourethane molded article, an optical material obtained therefrom, and a method for producing the same.
- Plastic lenses are lighter, harder to break than inorganic lenses, and can be dyed. Therefore, plastic lenses are rapidly spreading to optical elements such as eyeglass lenses and camera lenses.
- Various resins for eyeglass lenses have been developed so far. in use.
- representative examples include allyl resins obtained from diethylene glycol bisallyl carbonate and diallyl isophthalate, (meth) acrylic resins obtained from (meth) acrylates, and polythiourethane resins obtained from isocyanates and thiols.
- the polythiourethane resin is one of the most suitable resins for plastic lenses having high transparency, high refractive index and low dispersion, and excellent in impact resistance, dyeability, workability and the like.
- a polythiourethane resin plastic lens is manufactured by a method in which an isocyanate compound and a thiol compound are cast polymerized with a glass mold.
- a release agent is essential.
- the mold release agent there are a method of applying an external mold release agent to the mold in advance and a method of adding an internal mold release agent to the polymerization monomer. From the viewpoint of productivity and the quality of the manufactured plastic lens, internal mold release agents such as acidic phosphates are widely used.
- Patent Document 1 discloses a method for producing a resin for a thiourethane optical material, which includes a step of preparing a resin composition comprising a polythiol compound and a polyisocyanate compound under a predetermined condition and performing cast polymerization. .
- a resin composition comprising a polythiol compound and a polyisocyanate compound under a predetermined condition and performing cast polymerization.
- Patent Documents 2 and 3 describe external mold release agents and methods for producing plastic lenses using them.
- Non-patent document 1 describes the influence of short wavelength blue light of about 420 nm on the eyes.
- damage to retinal nerve cells rat cultured retinal nerve R28 cells
- blue LED light having different peak wavelengths of 411 nm and 470 nm
- irradiation with blue light having a peak wavelength at 411 nm causes cell death of retinal neurons within 24 hours, whereas blue light having a peak wavelength at 470 nm has the same amount.
- Patent Document 4 discloses that the average light transmittance in a region of 300 nm or more and 400 nm or less is suppressed by adding an ultraviolet absorber.
- Patent Document 5 discloses that at least two kinds of ultraviolet absorbers having different maximum absorption wavelengths are contained.
- Patent Document 6 discloses a plastic lens in which the lens is not yellowed or changed in refractive index due to the addition of an ultraviolet absorber, and the mechanical strength of the lens does not decrease.
- Patent Document 7 discloses an ultraviolet transmittance at 400 nm or less in a 1.1 mm-thick plastic lens in which a benzotriazole derivative is added as an ultraviolet absorber.
- Patent Document 8 discloses a resin composition containing a thermoplastic resin, an ultraviolet absorber, and iron oxide fine particles.
- Deterioration of releasability is directly related to defects such as breakage of the glass mold and the molded body itself, which greatly affects productivity.
- the internal mold release agent there was a trade-off relationship between the improvement in productivity due to the improvement in mold releasability of the molded body and the improvement in yield of the molded body due to improvement in transparency and the like. Therefore, there has been a demand for a material having sufficient releasability and improved transparency of the molded body.
- the resin may be yellowed depending on the type of the ultraviolet absorber, or optical In some cases, the resin composition was precipitated without being completely dissolved in the material composition, and the resin became cloudy.
- Patent Document 8 The technique described in Patent Document 8 is to add iron oxide fine particles, and the molded body may be colored. In fields requiring transparency such as eyeglass lenses, there was a problem in appearance. Further, a polycarbonate resin is used as the transparent thermoplastic resin, and there is room for improvement in optical properties such as refractive index and Abbe number. Thus, there has been a demand for a material that has an improved blocking effect of about 420 nm of blue light from harmful ultraviolet rays, is colorless and transparent, and has an excellent appearance.
- the present inventors have intensively studied to solve the above problems.
- the use of a polyisocyanate containing 20 mol% or more of the secondary isocyanato groups makes it an internal mold release agent. It has been found that a small amount of phosphate ester can be obtained, and a molded body having improved mold release properties and improved transparency can be obtained.
- the molding has a high blocking effect on blue light of about 420 nm from harmful ultraviolet rays, is colorless and transparent, and has an excellent appearance. We found that the body was obtained.
- Polythiol (B) is pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), bis (mercaptoethyl) sulfide, 4-mercaptomethyl-1,8-dimercapto-3 , 6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-tri Thiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 2,5-dimercaptomethyl-1,4-dithiane, 1,1,3,3-tetrakis (Mercaptomethylthio) propane, 4,6-bis (mercaptomethylthio) -1,3-dithiane,
- [8] A molded product obtained by curing the polymerizable composition for optical materials according to any one of [1] to [7].
- An optical material comprising the molded article according to [8].
- a method for manufacturing a plastic spectacle lens using a lens casting mold comprising: Injecting the polymerizable composition for an optical material according to any one of [1] to [7] into the gap surrounded by the first surface, the second surface and the cavity; Polymerizing and curing the polymerizable composition for an optical material in the voids; Including A method of manufacturing a plastic spectacle lens, wherein a radius of curvature R of at least one of the first surface and the second surface is 30 mm ⁇ R ⁇ 100 mm.
- the polymerizable composition for an optical material according to the present invention uses a specific amount of a polyisocyanate containing a secondary isocyanate group, whereby the addition amount of an acidic phosphate ester is improved in terms of the transparency of the molded product, and the mold release.
- the amount can also be improved.
- by using a predetermined ultraviolet absorber it is possible to selectively absorb light in a low wavelength region of 400 nm to 420 nm, and provide an optical material with improved blue light blocking effect can do.
- the polymerizable composition for an optical material of the present invention the transparency and the like of the molded body are improved, the yield is further improved, and the breakage of the glass mold and the molded body itself is suppressed by further improving the releasability. It is excellent in productivity, and further, the influence of harmful light on the eyes can be reduced and obstacles such as eye strain and stress can be suppressed. Therefore, it can be suitably used particularly as a plastic spectacle lens.
- the polymerizable composition for an optical material of the present embodiment includes a polyisocyanate (A), Polythiol (B) and the following general formula (1)
- An acidic phosphate ester (C) represented by: And one or more ultraviolet absorbers (D) having a maximum absorption peak in the range of 350 nm or more and 370 nm or less.
- the polyisocyanate (A) contains 20 mole% or more of secondary isocyanate groups
- the acidic phosphate ester (C) is contained in an amount of 100 to 700 ppm based on the total weight of the polyisocyanate (A) and the polythiol (B).
- the polyisocyanate (A) is an isocyanate having two or more isocyanato groups. When the total number of moles of all isocyanato groups is 100 mol%, the secondary isocyanate group is contained in an amount of 20 mol% or more.
- Polyisocyanate (A) may be comprised from 1 type of polyisocyanate, and may be comprised by 2 or more types.
- polyisocyanate (A) examples include aliphatic polyisocyanates, alicyclic polyisocyanates, aromatic polyisocyanates, and heterocyclic polyisocyanates.
- the polyisocyanate (A) is used singly or in combination of two or more to satisfy the above conditions. .
- These polyisocyanates may include dimers, trimers and prepolymers.
- Aliphatic polyisocyanates include hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, pentamethylene diisocyanate, lysine diisocyanatomethyl ester, lysine triisocyanate, m- Xylylene diisocyanate, ⁇ , ⁇ , ⁇ ', ⁇ '-tetramethylxylylene diisocyanate, bis (isocyanatomethyl) naphthalene, mesitylylene triisocyanate, bis (isocyanatomethyl) sulfide, bis (isocyanatoethyl) sulfide, Bis (isocyanatomethyl) disulfide, bis (isocyanatoethyl) disulfide, bis (isocyanatomethylthio) methane, bis (isocyanatoethylthio) methane, bis
- aromatic polyisocyanate examples include tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, phenylene diisocyanate, etc.
- the tolylene diisocyanate is more preferable than 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate.
- tolylene diisocyanate examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, or a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate. Can be used.
- Heterocyclic polyisocyanates include 2,5-diisocyanatothiophene, 2,5-bis (isocyanatomethyl) thiophene, 2,5-diisocyanatotetrahydrothiophene, 2,5-bis (isocyanatomethyl) tetrahydrothiophene 3,4-bis (isocyanatomethyl) tetrahydrothiophene, 2,5-diisocyanato-1,4-dithiane, 2,5-bis (isocyanatomethyl) -1,4-dithiane, 4,5-diisocyanato-1 , 3-dithiolane, 4,5-bis (isocyanatomethyl) -1,3-dithiolane, and the like, and at least one of them can be used.
- the polyisocyanate (A) contains at least 20 mol% of secondary isocyanate groups when the total number of moles of all isocyanate groups is 100 mol% in combination of one or more selected from these polyisocyanates. Can be used.
- the polyisocyanate (A) preferably contains at least one selected from hexamethylene diisocyanate, bis (4-isocyanatocyclohexyl) methane and isophorone diisocyanate.
- the secondary isocyanato group is 20 mol% or more, preferably 20 to 100 mol%, more preferably 30 to 100 mol%, when the total number of moles of all isocyanato groups is 100 mol%.
- it can be contained in an amount of 40 to 100 mol%.
- Polythiol (B) The polythiol (B) used in the present embodiment is a compound having two or more mercapto groups. Polythiol (B) can use the compound which has a 2 or more mercapto group 1 type or in combination of 2 or more types.
- polythiol (B) examples include methanedithiol, 1,2-ethanedithiol, 1,2,3-propanetrithiol, 1,2-cyclohexanedithiol, bis (2-mercaptoethyl) ether, tetrakis (mercaptomethyl) Methane, diethylene glycol bis (2-mercaptoacetate), diethylene glycol bis (3-mercaptopropionate), ethylene glycol bis (2-mercaptoacetate), ethylene glycol bis (3-mercaptopropionate), trimethylolpropane tris (2 -Mercaptoacetate), trimethylolpropane tris (3-mercaptopropionate), trimethylolethane tris (2-mercaptoacetate), trimethylolethanetris (3-mercaptopropionate), pe Taerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), bis (
- oligomers of these polythiols and halogen-substituted products such as chlorine-substituted products and bromine-substituted products may be used.
- active hydrogen compounds can be used alone or in combination of two or more.
- polythiol (B) examples include pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), bis (mercaptoethyl) sulfide, 4-mercaptomethyl-1,8-dimercapto-3,6 -Dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 2,5-dimercaptomethyl-1,4-dithiane, 1,1,3,3-tetrakis (mercapto Methylthio) propane, 4,6-bis (mercaptomethylthio) -1,3-dit
- the acidic phosphate ester (C) can be represented by the general formula (1).
- m represents an integer of 1 or 2
- n represents an integer of 0 to 18
- R 1 represents an alkyl group having 1 to 20 carbon atoms
- R 2 and R 3 are each independently A hydrogen atom, a methyl group, or an ethyl group is shown.
- the number of carbon atoms in m is preferably 4 to 20.
- R 1 in the general formula (1) is, for example, linear aliphatic such as methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, tetradecane, hexadecane, etc.
- organic residues derived from alicyclic compounds such as cyclopentane, cyclohexane, 1,2-dimethylcyclohexane, 1,3-dimethylcyclohexane, 1,4-dimethylcyclohexane, and the like. At least one selected from can be used. In addition, it is not limited only to these exemplary compounds.
- acidic phosphate ester (C) at least one kind or a mixture of two or more kinds can be used.
- n is preferably 0 or 1.
- R 1 is preferably a linear or branched alkyl group having 4 to 12 carbon atoms, and more preferably a linear alkyl group having 8 to 12 carbon atoms.
- R 1 is preferably a linear or branched alkyl group having 1 to 20 carbon atoms, and is preferably a linear or branched alkyl group having 3 to 12 carbon atoms.
- the acidic phosphate ester (C) can be used as one or a mixture of two or more selected from these.
- the ultraviolet absorber (D) is not particularly limited as long as it has a maximum absorption wavelength in the range of 350 nm or more and 370 nm or less when dissolved in a chloroform solution.
- an optical material that selectively absorbs light in a low wavelength region of 400 nm to 420 nm, has a very high blue light blocking effect, is colorless and transparent, and has an excellent appearance can be obtained. .
- a benzotriazole-based compound is preferable, and 2- (2H-benzotriazol-2-yl) -4-tert-octylphenol, 2- (5-chloro-2H-benzotriazol-2-yl) Examples include -4-methyl-6-tert-butylphenol and 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -chlorobenzotriazole. Of these, chloro-substituted benzotriazole compounds are more preferred, and examples include 2- (2-hydroxy-3-t-butyl-5-methylphenyl) -chlorobenzotriazole.
- 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -chlorobenzotriazole examples include TINUVIN 326 manufactured by BASF, SEESERB 703 manufactured by Sipro Kasei Co., Ltd., Biosorb 550 manufactured by Kyodo Kasei Co., Ltd. Is mentioned. Since the ultraviolet absorber (D) is a kind selected from chloro-substituted benzotriazole compounds, an optical material that has a very high blocking effect of about 420 nm of blue light from harmful ultraviolet rays, is colorless and transparent, and has an excellent appearance. It can be obtained more effectively.
- any ultraviolet absorber which comprises an ultraviolet absorber (D) has the maximum absorption peak in the range of 350 nm or more and 370 nm or less.
- the polymerizable composition for an optical material of the present embodiment is the above-mentioned (A), (B), (C) for the purpose of improving various physical properties, operability, polymerization reactivity and the like of the obtained polythiourethane molded product.
- active hydrogen compounds represented by catalysts, alcohols, hydroxythiols, amines, etc., epoxy compounds, thioepoxy compounds, olefin compounds, carbonate compounds, ester compounds, metals, metal oxides and their fine particles
- resin modifiers other than urethane-forming raw materials such as organically modified metal (oxide) fine particles, organic metal compounds, and inorganic substances can be included.
- the catalyst examples include Lewis acid, amine, organic acid, amine organic acid salt and the like, Lewis acid, amine and amine organic acid salt are preferable, and dimethyltin chloride, dibutyltin chloride and dibutyltin laurate are more preferable.
- chain extenders such as chain extenders, crosslinking agents, light stabilizers, antioxidants, oil-soluble dyes, fillers, and bluing agents, as in known molding methods. Can do.
- the addition amount of these additives is 0.05 to 2.0 parts by weight with respect to 100 parts by weight of the total of the polyisocyanate (A) and the polythiol (B) and the polymerizable compound that can be added as necessary. Parts by weight are preferred, and 0.05 to 1.5 parts by weight are more preferred.
- the polymerizable composition for an optical material of the present embodiment can be obtained by mixing the aforementioned components.
- the mixing method can be performed by a conventionally known method.
- the polymerizable composition for an optical material of the present embodiment is a molar ratio of the total mercapto groups of the polythiol (B) contained in the polymerizable composition to the total isocyanate groups of the polyisocyanate (A) contained in the polymerizable composition. Is in the range of 0.8 to 1.2, preferably in the range of 0.85 to 1.15, and more preferably in the range of 0.9 to 1.1. Within the said range, the polymeric composition for optical materials used suitably as an optical material, especially a plastic spectacle lens can be obtained.
- the ultraviolet absorber (D) is 0 in 100% by weight of the polymerizable composition for an optical material from the viewpoint of blocking blue light of about 420 nm from harmful ultraviolet rays. 0.1 to 1.5% by weight, preferably 0.1 to 0.8% by weight, more preferably 0.2 to 0.6% by weight, particularly preferably 0.3 to 0.5% by weight. .
- the method for producing the optical material is not particularly limited, but cast polymerization may be mentioned as a preferred production method.
- the optical material of the present embodiment uses the acidic phosphate ester (C) as a mold release agent, but improves the transparency and the like of the molded product and has excellent mold release properties, and further has a low wavelength region of 400 nm to 420 nm. Is selectively absorbed, so that the blue light blocking effect is excellent, and the balance of these physical properties is excellent.
- C acidic phosphate ester
- the optical material of the present embodiment can improve obstacles such as eye strain and stress by cutting light having a wavelength of 400 nm to 420 nm.
- Optical materials include plastic eyeglass lenses, goggles, eyesight correction eyeglass lenses, imaging equipment lenses, liquid crystal projector Fresnel lenses, lenticular lenses, contact lenses and other plastic lenses, light emitting diode (LED) encapsulants, light Waveguides, optical lenses and optical adhesives used to join optical waveguides, antireflection films used for optical lenses, etc., transparent coatings used on liquid crystal display device members (substrates, light guide plates, films, sheets, etc.) or the front of cars Examples thereof include a sheet or film to be attached to glass or a motorcycle helmet, and a transparent substrate.
- LED light emitting diode
- the optical material of the present embodiment has a thickness of 2 mm.
- the light transmittance at a wavelength of 410 nm is 10% or less, preferably 5% or less
- the light transmittance at a wavelength of 420 nm is 70% or less, preferably 50% or less
- the light transmittance at a wavelength of 440 nm is 80% or more, preferably 85% or more.
- the blocking effect of blue light of about 420 nm from harmful ultraviolet rays is high, and it is colorless and transparent and excellent in appearance.
- the molded object (optical material) excellent in the colorless and transparent external appearance can be obtained by the light transmittance of 440 nm being 80% or more.
- an optical material composed of a lens base material typically, an optical material composed of a lens base material, an optical material composed of a lens base material and a film layer, an optical material composed of a lens base material and a coating layer, and a lens base
- An optical material comprising a material, a film layer, and a coating layer can be mentioned.
- the lens substrate is obtained from the polymerizable composition for an optical material of the present embodiment, and the aforementioned ultraviolet absorber (D) is included in the lens substrate.
- the ultraviolet absorber (D) may be contained in the film layer and / or the coating layer.
- an optical material composed only of a lens base material, an optical material in which a film layer is laminated on at least one surface of the lens base material, and at least one surface of the lens base material An optical material in which a coating layer is laminated, an optical material in which a film layer and a coating layer are laminated on at least one surface of a lens substrate, an optical material in which a film layer is sandwiched between two lens substrates, etc. Is mentioned.
- the optical material of the present embodiment has the characteristics (1) to (3) as a whole, and can be manufactured as follows.
- the ultraviolet absorber (D) contained in an optical material should just contain 1 or more types of compounds which satisfy
- the lens substrate, the film layer, or the coating layer may further contain a known ultraviolet absorber other than the ultraviolet absorber (D).
- a molded body (lens substrate) can be prepared using the polymerizable composition for an optical material of the present embodiment, and an optical material can be prepared using the molded body.
- the optical material of the present embodiment can be suitably used as a plastic lens such as a plastic spectacle lens.
- the optical material of this embodiment will be described using a plastic lens.
- plastic lens of the present embodiment examples include the following configurations.
- Plastic lens A The lens base material which consists of the polymeric composition for optical materials of this embodiment is provided.
- Plastic lens B A film or a layer is provided on at least one surface of a lens substrate (lens substrate obtained from the composition for optical materials of the present embodiment).
- Plastic lens C A lens substrate (a lens substrate obtained from the composition for optical materials of the present embodiment) is laminated on both surfaces of the film.
- the plastic lenses A to C obtained with the above configuration are designed so as to satisfy the characteristics (1) to (3) of the present invention.
- the optical material can be suitably used for a plastic spectacle lens.
- the plastic lens A in the present embodiment includes a lens substrate made of a polymerizable composition for optical materials.
- the obtained plastic lens is designed to satisfy the characteristics (1) to (3) of the present invention.
- the method for producing the plastic lens A provided with the lens substrate made of the polymerizable composition for optical materials is not particularly limited, but a preferred production method includes casting polymerization using a lens casting mold.
- the plastic lens A of the present embodiment includes a first mold having a first surface for forming one surface of the plastic lens A, and a second surface for forming the other surface of the plastic lens A. It can be manufactured using a lens casting mold comprising a second mold and a cavity for fixing these surfaces facing each other.
- the curvature radius R of at least one of the first surface and the second surface is 30 mm ⁇ R ⁇ 100 mm. According to the polymerizable composition for an optical material of the present embodiment, even a lens casting mold having a lens forming surface having such a radius of curvature is excellent in releasability.
- a plastic lens A10 having a convex surface 14a and a concave surface 14b having a radius of curvature R of 30 mm ⁇ R ⁇ 100 mm as shown in FIG. 1 is used as a lens casting mold 20 as shown in FIG. Can be obtained.
- the lens casting mold 20 includes a first mold 22a having a first surface (concave surface a) for forming one surface of a plastic spectacle lens, and a second surface (convex surface) for forming the other surface.
- the material of the gasket 22c is polyvinyl chloride, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-propylene copolymer, ethylene-propylene-diene copolymer, polyurethane elastomer, fluororubber, or a soft elastic blended with polypropylene. Resins are used. A material that neither swells nor elutes with respect to the polymerizable composition for optical materials used in the present embodiment is preferable.
- Examples of the material of the first mold 22a and the second mold 22b include glass and metal, and glass is usually used.
- a coating liquid for imparting hard coating performance to the lens material may be applied in advance to the mold.
- the polymerizable composition for optical material is injected into the gap 24 of the lens casting mold 20 by a predetermined injection means.
- a defoaming treatment under reduced pressure, a filtration treatment such as pressurization and reduced pressure, and the like as necessary.
- the polymerizable composition for an optical material is polymerized and cured in the gap 24.
- the polymerization conditions are not limited because the conditions vary greatly depending on the polymerizable composition for the optical material, the type and amount of the catalyst used, the shape of the mold, etc., but about 1 to about -50 to 150 ° C. It takes 50 hours. In some cases, it is preferable to hold in the temperature range of 10 to 150 ° C. or gradually raise the temperature and cure in 1 to 25 hours.
- the obtained molded body is released from the lens casting mold 20.
- the molded body may be subjected to a treatment such as annealing as necessary.
- the treatment temperature is usually 50 to 150 ° C., preferably 90 to 140 ° C., more preferably 100 to 130 ° C.
- the molded body thus obtained can be used as a plastic spectacle lens.
- the plastic lens A 10 includes a convex surface 14a and a concave surface 14b having a radius of curvature R of 30 mm ⁇ R ⁇ 100 mm.
- the plastic lens A in the present embodiment may have various coating layers on a lens substrate made of a polymerizable composition for optical materials according to the purpose and application.
- the coating layer can be prepared using a coating material (composition), and the coating material may contain an ultraviolet absorber (D).
- the ultraviolet absorber (D) is dispersed in the coating layer by immersing the plastic lens with the coating layer in a dispersion obtained by dispersing the ultraviolet absorber (D) in water or a solvent. It can be prepared by impregnating.
- the plastic lens B in this embodiment includes a film or a layer on at least one surface of the lens base material surface made of the polymerizable composition for optical materials.
- the obtained plastic lens is designed to satisfy the characteristics (1) to (3) of the present invention.
- a manufacturing method of the plastic lens B (1) a method of manufacturing a lens substrate made of a polymerizable composition for an optical material, and then laminating a film or sheet on at least one surface of the lens substrate; 2) In a cavity of a molding mold held by a gasket or tape as described later, a film or a sheet is disposed along one inner wall of the mold, and then the polymerizable composition for optical material is injected into the cavity. And a curing method.
- the film or sheet used in the method (1) is not particularly limited, but pellets of the composition obtained by melt-kneading or impregnation are conventionally known in various known methods, specifically, for example, injection molding. Method, profile extrusion molding method, pipe molding method, tube molding method, dissimilar molded body coating molding method, injection blow molding method, direct blow molding method, T-die sheet or film molding method, inflation film molding method, press molding method, etc. It can be obtained by a molding method.
- the resulting film or sheet comprises polycarbonate, polyolefin, or the like.
- the film or sheet may contain an ultraviolet absorber (D).
- a known method can be used as a method of bonding the film or sheet onto the surface of the lens substrate.
- the casting polymerization in the method (2) can be performed in the same manner as in the plastic lens A method.
- the plastic lens B in the present embodiment may have various coating layers on a lens substrate or a “film or layer” made of a polymerizable composition for optical materials, in accordance with the purpose and application. Good.
- the coating layer can contain an ultraviolet absorber (D).
- plastic lens C In the plastic lens C in the present embodiment, a lens base material obtained from the polymerizable composition for an optical material of the present embodiment is laminated on both surfaces of the film.
- the obtained plastic lens is designed to satisfy the characteristics (1) to (3) of the present invention.
- a manufacturing method of the plastic lens C (1) a method of manufacturing a lens substrate made of the polymerizable composition for an optical material according to the present embodiment, and laminating it on both surfaces of a film or a sheet; In the cavity of the molding mold held by the method, a film or a sheet is placed in a state of being separated from the inner wall of the mold, and then the polymerizable composition for an optical material of the present embodiment is injected into the cavity and cured. Can be mentioned.
- the film or sheet and the lens substrate used in the method (1) can be the same as the method (1) for the plastic lens B.
- a known method can be used as a method of bonding the film or sheet onto the surface of the lens substrate.
- the method (2) can be specifically performed as follows. A film or sheet is placed in the space of the lens casting mold used in the method for manufacturing the plastic lens A so that both surfaces thereof are parallel to the front mold inner surface facing each other. Next, in the space of the lens casting mold, the polymerizable composition for an optical material of the present embodiment is injected into two gaps between the mold and the polarizing film by a predetermined injection means.
- the lens casting mold is heated and molded by a predetermined temperature program in a heatable apparatus such as an oven or water.
- the resin molded body may be subjected to a treatment such as annealing as necessary.
- the plastic lens C in the present embodiment may have various coating layers on the lens substrate in accordance with the purpose and application. Similar to the plastic lens A, the coating layer can contain an ultraviolet absorber (D).
- a plastic spectacle lens can be obtained using the plastic lens of the present embodiment.
- a coating layer may be provided on one side or both sides.
- the coating layer include a primer layer, a hard coat layer, an antireflection film layer, an antifogging coat film layer, an antifouling layer, and a water repellent layer.
- Each of these coating layers can be used alone, or a plurality of coating layers can be used in multiple layers. When a coating layer is applied to both sides, a similar coating layer or a different coating layer may be applied to each surface.
- Each of these coating layers is an ultraviolet absorber for the purpose of protecting the lens and eyes from ultraviolet rays, an infrared absorber for the purpose of protecting the eyes from infrared rays, a light stabilizer, an antioxidant, and a lens for the purpose of improving the weather resistance of the lens.
- an ultraviolet absorber for the purpose of protecting the lens and eyes from ultraviolet rays
- an infrared absorber for the purpose of protecting the eyes from infrared rays
- a light stabilizer for the purpose of protecting the eyes from infrared rays
- an antioxidant for the purpose of improving the weather resistance of the lens.
- a lens for the purpose of improving the weather resistance of the lens.
- dyes and pigments, photochromic dyes and photochromic pigments, antistatic agents, and other known additives for enhancing the performance of the lens may be used in combination.
- various leveling agents for the purpose of improving coating properties may be used.
- the primer layer is usually formed between a hard coat layer described later and the optical lens.
- the primer layer is a coating layer for the purpose of improving the adhesion between the hard coat layer formed thereon and the lens, and in some cases, the impact resistance can also be improved.
- Any material can be used for the primer layer as long as it has high adhesion to the obtained optical lens, but usually it is mainly composed of urethane resin, epoxy resin, polyester resin, melanin resin, and polyvinyl acetal.
- a primer composition or the like is used.
- the primer composition may use an appropriate solvent that does not affect the lens for the purpose of adjusting the viscosity of the composition. Of course, you may use it without a solvent.
- the plastic spectacle lens using the thiourethane resin of the present embodiment may be dyed using a dye according to the purpose for the purpose of imparting fashionability or photochromic properties.
- the lens can be dyed by a known dyeing method.
- the radius of curvature R of at least one of the first surface and the second surface may be 30 mm ⁇ R ⁇ 100 mm.
- the radius of curvature R is 30 mm ⁇ R ⁇ 100 mm
- the second surface is a substantially flat surface
- the first surface is a convex surface.
- the obtained plastic spectacle lens may have a curvature radius R of at least one surface of 30 mm ⁇ R ⁇ 100 mm.
- a curvature radius R of at least one surface of 30 mm ⁇ R ⁇ 100 mm when (1) one surface is convex and the radius of curvature R is 30 mm ⁇ R ⁇ 100 mm and the other surface is substantially flat, (2) one surface is concave, When the radius of curvature R is 30 mm ⁇ R ⁇ 100 mm and the other surface is substantially flat, (3) one surface and the other surface are both concave surfaces, and the curvature radius R of both surfaces is 30 mm. In the case of ⁇ R ⁇ 100 mm, (4) one surface and the other surface are both convex surfaces, and the curvature radius R of both surfaces is 30 mm ⁇ R ⁇ 100 mm.
- a polymerizable composition is injected into a molding mold in which a glass substrate having a concave surface a and a convex surface b with a curvature radius R of 30 mm ⁇ R ⁇ 100 mm is combined, and the composition is polymerized.
- a wedge-shaped release jig is inserted into the contact surface between the obtained molded body and the molding mold, and the molded body is peeled off from the mold.
- a molded product and a mold that was released without any defects such as breakage and breakage of the mold were evaluated as ⁇ .
- a case where defects such as breakage of the molded body at the time of the operation, part of the cracked mold joined to the molded body, and damage to the mold was evaluated as x.
- Example 1 ZelecUN (manufactured by STEPAN, acidic phosphate represented by the general formula (1)) 0.05 parts by weight, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -chlorobenzotriazole (BASF TINUVIN 326: maximum absorption wavelength 352 nm) 1.1 parts by weight and bis (4-isocyanatocyclohexyl) methane 60.2 parts by weight were stirred and mixed at 20 ° C. to obtain a uniform solution.
- BASF TINUVIN 326 maximum absorption wavelength 352 nm
- Example 2 A molded body was obtained in the same manner as in Example 1 except that 0.05 g by weight of ZelecUN (manufactured by STEPAN) was changed to 0.03 parts by weight. At the time of mold release, the molded body was not broken and the molded mold was not damaged. The molded body was colorless and transparent. The ultraviolet-visible light spectrum of the obtained molded body was measured using a spectrophotometer UV-1600 (manufactured by Shimadzu Corporation). The evaluation results are shown in Table 1.
- Example 3 ZelecUN (manufactured by STEPAN, acid phosphate represented by general formula (1)) 0.03 part by weight, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -chlorobenzotriazole (BASF TINUVIN 326: maximum absorption wavelength: 352 nm) 0.8 parts by weight and 56.1 parts by weight of isophorone diisocyanate were stirred and mixed at 20 ° C. to obtain a uniform solution.
- STEPAN acid phosphate represented by general formula (1)
- 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -chlorobenzotriazole BASF TINUVIN 326: maximum absorption wavelength: 352 nm
- ZelecUN manufactured by STEPAN, acidic phosphate represented by the general formula (1)
- BASF TINUVIN 326 maximum absorption wavelength: 352 nm
- 0.8 part by weight, 45.7 parts by weight of isophorone diisocyanate and 9.1 parts by weight of hexamethylene diisocyanate were stirred and mixed at 20 ° C. to obtain a uniform solution.
- m-1 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane
- m-2 bis (4-isocyanatocyclohexyl) methane
- m-3 isophorone diisocyanate
- m-4 hexamethylene diisocyanate
- the polymerizable composition for an optical material obtained by mixing with a polyisocyanate compound containing a predetermined amount of a secondary isocyanato group and a polythiol compound has a radius of curvature of 30 mm ⁇ R Even when ⁇ 100 mm, the mold could be easily released. Since it becomes possible to suppress breakage of the glass mold and the molded body itself, it is possible to improve productivity.
- light in a low wavelength region of 400 nm to 420 nm is selected by using an ultraviolet absorber (D) whose maximum absorption peak is in the range of 350 nm to 370 nm. Absorbed. This makes it possible to provide an optical material with an improved blue light blocking effect.
- D ultraviolet absorber
- the present invention includes the following aspects.
- polyisocyanate (A) contains at least one selected from bis (4-isocyanatocyclohexyl) methane and isophorone diisocyanate.
- Polythiol (B) is pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), bis (mercaptoethyl) sulfide, 4-mercaptomethyl-1,8-dimercapto-3 , 6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-tri Thiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 2,5-dimercaptomethyl-1,4-dithiane, 1,1,3,3-tetrakis (Mercaptomethylthio) propane, 4,6-bis (mercaptomethylthio) -1,3-dithiane
- [A4] A molded product obtained by curing the polymerizable composition for optical materials according to any one of [a1] to [a3].
- [A5] An optical material comprising the molded article according to [a4].
- [A6] A plastic spectacle lens made of the optical material according to [a5].
- [A7] The plastic spectacle lens according to [a6], wherein a curvature radius R of at least one surface satisfies 30 mm ⁇ R ⁇ 100 mm.
- a method for producing an optical material comprising a step of cast polymerization of the optical material polymerizable composition according to any one of [a1] to [a3].
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Abstract
Description
特許文献2および3には、外部離型剤およびそれらを用いたプラスチックレンズの製造方法について記載されている。
また、長い間、眼に青色光の照射を浴びることは、眼精疲労やストレスを受けることが懸念されており、加齢黄斑変性を引き起こす要因と考えられている。
特許文献5には、極大吸収波長が異なる紫外線吸収剤を少なくとも2種含有することが開示されている。特許文献6には、紫外線吸収剤の添加によるレンズの黄色化や屈折率変化等がなく、さらにレンズの機械強度が低下しないプラスチックレンズが開示されている。
特許文献7には、ベンゾトリアゾール誘導体を紫外線吸収剤として添加し1.1mm厚のプラスチックレンズにおける400nm以下での紫外線透過率が開示されている。特許文献8には、熱可塑性樹脂、紫外線吸収剤、および酸化鉄微粒子を含む樹脂組成物が開示されている。
特許文献2および3に記載のように外部離型剤を用いる場合、成形の度に鋳型の内部表面に外部離型剤を塗付する必要があるため、成形物の生産性が低下することがあった。さらに、外部離型剤が成形物表面に付着し、成形物表面にムラを生じたり、または成形物の表面を塗装したり成形物を染色する際に塗装不良や染色不良が生じ、所望の製品が得られないことがあった。さらに、透明樹脂成形物に濁りが生ずる等の外観に問題が生じることがあった。
一方、酸性リン酸エステル量を減らした場合、成形体の透明性等は改善されるものの、成型モールドからの離型性は低下し、成形体に破断等が観察される場合があった。特に、レンズの曲率半径が小さくなり度数が大きくなる場合、つまりレンズ表面の湾曲が大きい場合、離型性は低下する傾向があった。離型性悪化は、ガラスモールドおよび成形体自体の破損等の不具合にも直結するので、生産性に大きな影響を与えてしまう。
このように、内部離型剤を用いる場合、成形体の離型性の向上による生産性の改善と、透明性等の改善による成形体の歩留まりの改善はトレードオフの関係にあった。したがって、十分な離型性を有しつつ、成形体の透明性等が改善された材料が望まれていた。
このように、有害な紫外線から420nm程度の青色光の遮断効果が改善され、無色透明で外観に優れる材料が望まれていた。
さらに、上記構成に加えて、極大吸収ピークが所定の範囲にある一種以上の紫外線吸収剤を用いることで、有害な紫外線から420nm程度の青色光の遮断効果が高く、無色透明で外観に優れる成形体が得られることを見出した。
[1] ポリイソシアネート(A)と、
ポリチオール(B)と、
下記一般式(1)
極大吸収ピークが350nm以上370nm以下の範囲である一種以上の紫外線吸収剤(D)と、を含んでなり、
ポリイソシアネート(A)中のイソシアナト基の合計モル数を100モル%とした場合において、2級イソシアナト基が20モル%以上含まれ、
酸性リン酸エステル(C)が、ポリイソシアネート(A)とポリチオール(B)の総重量に対して100~700ppmの量で含まれる、光学材料用重合性組成物。
[2] 前記紫外線吸収剤(D)が、ベンゾトリアゾール系化合物から選択された一種である[1]に記載の光学材料用重合性組成物。
[3] 前記ベンゾトリアゾール系化合物が、クロロ置換ベンゾトリアゾール系化合物から選択された一種である[2]に記載の光学材料用重合性組成物。
[4] 前記クロロ置換ベンゾトリアゾール系化合物が、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾールである[3]に記載の光学材料用重合性組成物。
[5] 前記紫外線吸収剤(D)は、光学材料用重合性組成物100重量%中に0.1~1.5重量%含まれる、[1]~[4]のいずれかに記載の光学材料用重合性組成物。
[6] ポリイソシアネート(A)が、ビス(4-イソシアナトシクロへキシル)メタン、イソホロンジイソシアネートから選択される少なくとも一種を含む、[1]~[5]のいずれかに記載の光学材料用重合性組成物。
[7] ポリチオール(B)が、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、ビス(メルカプトエチル)スルフィド、4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン、5,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,8-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、2,5-ジメルカプトメチル-1,4-ジチアン、1,1,3,3-テトラキス(メルカプトメチルチオ)プロパン、4,6-ビス(メルカプトメチルチオ)-1,3-ジチアン、2-(2,2-ビス(メルカプトメチルチオ)エチル)-1,3-ジチエタン、エチレングリコールビス(3-メルカプトプロピオネート)から選択される少なくとも一種である、[1]~[6]のいずれかに記載の光学材料用重合性組成物。
[8] [1]~[7]のいずれかに記載の光学材料用重合性組成物を硬化させて得られる成形体。
[9] [8]に記載の成形体からなる光学材料。
[10] 厚み2mmで測定した光透過率が下記(1)~(3)の特性を満たす、[9]に記載の光学材料;
(1)波長410nmにおける光透過率が10%以下である。
(2)波長420nmにおける光透過率が70%以下である。
(3)波長440nmにおける光透過率が80%以上である。
[11] [9]または[10]に記載の光学材料からなるプラスチック眼鏡レンズ。
[12] 少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmである、[11]に記載のプラスチック眼鏡レンズ。
[13] [1]~[7]のいずれかに記載の光学材料重合性組成物を注型重合する工程を含む、光学材料の製造方法。
[14] プラスチック眼鏡レンズの一方の面を形成するための第1の面を備える第1モールドと、他方の面を形成するための第2の面を備える第2モールドと、これらの面を対向して固定するキャビティと、を備えるレンズ注型用鋳型を用いたプラスチック眼鏡レンズの製造方法であって、
前記第1の面、前記第2の面および前記キャビティで囲繞された空隙内に、[1]~[7]のいずれかに記載の光学材料用重合性組成物を注入する工程と、
前記光学材料用重合性組成物を前記空隙内で重合硬化する工程と、
を含み、
前記第1の面および前記第2の面の少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmである、プラスチック眼鏡レンズの製造方法。
つまり、本発明の光学材料用重合性組成物によれば、成形体の透明性等が改善され、さらに歩留まりに優れ、またさらに離型性向上により、ガラスモールドおよび成形体自体の破損が抑制され生産性にも優れ、さらに有害光の眼への影響が軽減され眼精疲労やストレスなどの障害を抑えることもできるため、特にプラスチック眼鏡レンズとして好適に用いることができる。
本実施形態の光学材料用重合性組成物は、ポリイソシアネート(A)と、
ポリチオール(B)と、下記一般式(1)
で表される酸性リン酸エステル(C)と、
極大吸収ピークが350nm以上370nm以下の範囲である一種以上の紫外線吸収剤(D)と、を含んでなる。
ポリイソシアネート(A)は、全イソシアナト基の合計モル数を100モル%とした場合において、2級イソシアナト基が20モル%以上含まれ、
酸性リン酸エステル(C)は、ポリイソシアネート(A)とポリチオール(B)の総重量に対して100~700ppmとなる量で含まれる。
ポリイソシアネート(A)は、イソシアナト基を二つ以上有するイソシアネートであって、全イソシアナト基の合計モル数を100モル%とした場合において、2級イソシアナト基が20モル%以上含まれる。ポリイソシアネート(A)は、1種のポリイソシアネートから構成されていてもよく、2種以上で構成されていてもよい。
ポリイソシアネート(A)は、ヘキサメチレンジイソシアネート、ビス(4-イソシアナトシクロへキシル)メタンおよびイソホロンジイソシアネートから選択される少なくとも1種を含むことが好ましい。
これにより、酸性リン酸エステル(C)の量を減らすことができるので、透明性等に優れた成形体を得ることができ、さらに離型性にも優れており、ガラスモールドおよび成形体自体の破損を抑制することができる。すなわち、成形体の離型性の向上による生産性の改善と、成形体の歩留まりの改善を両立することができる。
本実施形態で用いられるポリチオール(B)は、2以上のメルカプト基を有する化合物である。ポリチオール(B)は、2以上のメルカプト基を有する化合物を1種または2種以上を組み合わせて用いることができる。
1,2-ジメルカプトベンゼン、1,3-ジメルカプトベンゼン、1,4-ジメルカプトベンゼン、1,2-ビス(メルカプトメチル)ベンゼン、1,3-ビス(メルカプトメチル)ベンゼン、1,4-ビス(メルカプトメチル)ベンゼン、1,2-ビス(メルカプトエチル)ベンゼン、1,3-ビス(メルカプトエチル)ベンゼン、1,4-ビス(メルカプトエチル)ベンゼン、1,3,5-トリメルカプトベンゼン、1,3,5-トリス(メルカプトメチル)ベンゼン、1,3,5-トリス(メルカプトメチレンオキシ)ベンゼン、1,3,5-トリス(メルカプトエチレンオキシ)ベンゼン、2,5-トルエンジチオール、3,4-トルエンジチオール、1,5-ナフタレンジチオール、2,6-ナフタレンジチオール等の芳香族ポリチオール化合物;
2-メチルアミノ-4,6-ジチオール-sym-トリアジン、3,4-チオフェンジチオール、ビスムチオール、4,6-ビス(メルカプトメチルチオ)-1,3-ジチアン、2-(2,2-ビス(メルカプトメチルチオ)エチル)-1,3-ジチエタン等の複素環ポリチオール化合物;が挙げられ、少なくとも1種を用いることができる。なお、これら例示化合物のみに限定されるものではない。
ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン、5,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,8-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、から選択される少なくとも一種がさらに好ましく使用される。
酸性リン酸エステル(C)は、一般式(1)で表すことができる。
nが0の場合、R1は、炭素数4~12の直鎖または分岐鎖アルキル基が好ましく、炭素数8~12の直鎖アルキル基がさらに好ましい。
nが1の場合、R1は、炭素数1~20の直鎖または分岐鎖アルキル基が好ましく、炭素数3~12の直鎖または分岐鎖アルキル基が好ましい。
酸性リン酸エステル(C)は、これらから選択される一種または二種以上の混合物として用いることができる。
本実施形態においては、2級イソシアナト基を所定の量で含むポリイソシアネート(A)を用いることで、酸性リン酸エステル(C)の量を上記のように低減した場合であっても、透明性等に優れた成形体を得ることができ、さらに離型性にも優れているため、ガラスモールドおよび成形体自体の破損を抑制することができる。すなわち、成形体の離型性の向上による生産性の改善と、透明性の改善による成形体の歩留まりの改善を両立することができる。このように、酸性リン酸エステル(C)の量が上記の量であれば、工業生産における離型性および透明性を改善することができ、さらに経済性等にも優れる。
紫外線吸収剤(D)は、クロロホルム溶液に溶解させた際の極大吸収波長が350nm以上370nm以下の範囲にあるものであれば特に限定されない。
紫外線吸収剤(D)を用いることにより、400nm~420nmの低波長領域の光を選択的に吸収し、青色光の遮断効果が非常に高く、無色透明で外観に優れる光学材料を得ることができる。
具体的には、2,2'-ジヒドロキシ-4-メトキシベンゾフェノン、2-ヒドロキシ-4-アクリロイルオキシベンゾフェノン、2-ヒドロキシ-4-アクリロイルオキシ-5-tert-ブチルベンゾフェノン、2-ヒドロキシ-4-アクリロイルオキシ-2',4'-ジクロロベンゾフェノン等のベンゾフェノン系化合物;
2-[4-[(2-ヒドロキシ-3-ドデシルオキシプロピル)オキシ]-2-ヒドロキシフェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、2-[4-(2-ヒドロキシ-3-トリデシルオキシプロピル)オキシ]-2-ヒドロキシフェニル]-4,6-ビス(2,4ジメチルフェニル)-1,3,5-トリアジン、2-[4-[(2-ヒドロキシ-3-(2'-エチル)ヘキシル)オキシ]-2-ヒドロキシフェニル]-4,6-ビス(2,4-ジメチルフェニル)-1,3,5-トリアジン、2,4-ビス(2-ヒドロキシ-4-ブチルオキシフェニル)-6-(2,4-ビス-ブチルオキシフェニル)-1,3,5-トリアジン、2-(2-ヒドロキシ-4-[1-オクチルオキシカルボニルエトキシ]フェニル)-4,6-ビス(4-フェニルフェニル)-1,3,5-トリアジン等のトリアジン系化合物;
2-(2H-ベンゾトリアゾール-2-イル)-4-メチルフェノール、2-(2H-ベンゾトリアゾール-2-イル)-4-tert-オクチルフェノール、2-(2H-ベンゾトリアゾール-2-イル)-4,6-ビス(1-メチル-1-フェニルエチル)フェノール、2-(2H-ベンゾトリアゾール-2-イル)-4,6-ジ-tert-ペンチルフェノール、2-(5-クロロ-2H-ベンゾトリアゾール-2-イル)-4-メチル-6-tert-ブチルフェノール、2-(5-クロロ-2H-ベンゾトリアゾール-2-イル)-2,4-tert-ブチルフェノール、2,2'-メチレンビス[6-(2H-ベンゾトリアゾール-2-イル)-4-(1,1,3,3-テトラメチルブチル)フェノール]、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール等のベンゾトリアゾール系化合物;などが挙げられる。これらの紫外線吸収剤は単独でも2種以上を併用することもできる。
本実施形態の光学材料用重合性組成物は、得られるポリチオウレタン成形体の諸物性、操作性、及び重合反応性等を改良する目的で、前述の(A)、(B)、(C)および(D)の他に、触媒、アルコール、ヒドロキシチオール、アミン等に代表される活性水素化合物、エポキシ化合物、チオエポキシ化合物、オレフィン化合物、カーボネート化合物、エステル化合物、金属、金属酸化物またそれらの微粒子例えば有機修飾金属(酸化物)微粒子、有機金属化合物、無機物等のウレタン形成原料以外の樹脂改質剤等を含むことができる。
触媒としては、ルイス酸、アミン、有機酸、アミン有機酸塩等が挙げられ、ルイス酸、アミン、アミン有機酸塩が好ましく、ジメチル錫クロライド、ジブチル錫クロライド、ジブチル錫ラウレートがより好ましい。
本実施形態の光学材料用重合性組成物は、前述の成分を混合することにより得ることができる。混合方法は、従来公知の方法により行うことができる。
本実施形態の光学材料用重合性組成物において、紫外線吸収剤(D)は、有害な紫外線から420nm程度の青色光の遮断効果の観点から、光学材料用重合性組成物100重量%中に0.1~1.5重量%、好ましくは0.1~0.8重量%、より好ましくは0.2~0.6重量%、特に好ましくは0.3~0.5重量%含むことができる。
次に、本実施形態の光学材料の用途について説明する。
本実施形態の光学材料は、離型剤として酸性リン酸エステル(C)を用いながらも、成形体の透明性等が改善されるとともに離型性にも優れ、さらに400nm~420nmの低波長領域の光を選択的に吸収するため、青色光の遮断効果に優れており、これらの物性のバランスに優れる。
(1) 波長410nmの光透過率が10%以下であり、好ましくは5%以下であり、
(2) 波長420nmの光透過率が70%以下、好ましくは50%以下であり、
(3) 波長440nmの光透過率が80%以上、好ましくは85%以上である。
上記光透過率の範囲であれば、有害な紫外線から420nm程度の青色光の遮断効果が高く、無色透明で外観に優れる。また、440nmの光透過率を80%以上とすることにより、無色透明の外観に優れた成形体(光学材料)を得ることができる。なお、これらの数値範囲は任意に組み合わせることができる。
プラスチックレンズA:本実施形態の光学材料用重合性組成物からなるレンズ基材を備える。
プラスチックレンズB:レンズ基材(本実施形態の光学材料用組成物から得られるレンズ基材)表面の少なくとも一方の面上に、フィルムまたは層を備える。
プラスチックレンズC:フィルムの両面上に、レンズ基材(本実施形態の光学材料用組成物から得られるレンズ基材)が積層されている。
上記の構成で得られたプラスチックレンズA~Cは、本発明の特性(1)~(3)を満たすように設計される。光学材料は、プラスチック眼鏡レンズに好適に用いることができる。
本実施形態におけるプラスチックレンズAは、光学材料用重合性組成物からなるレンズ基材を備える。得られたプラスチックレンズは、本発明の特性(1)~(3)を満たすように設計される。
光学材料用重合性組成物からなるレンズ基材を備えるプラスチックレンズAを製造する方法は、特に限定されないが、好ましい製造方法としてレンズ注型用鋳型を用いた注型重合が挙げられる
以下、本実施形態のプラスチックレンズAの製造方法を詳細に説明する。
本実施形態の光学材料用重合性組成物によれば、このような曲率半径を有するレンズ形成面を備えるレンズ注型用鋳型であっても、離型性に優れる。
レンズ注型用鋳型20は、プラスチック眼鏡レンズの一方の面を形成するための第1の面(凹面a)を備える第1モールド22aと、他方の面を形成するための第2の面(凸面b)を備える第2モールド22bと、これらの面を対向して固定するキャビティ22cと、を備える。レンズ注型用鋳型20には、凹面a、凸面bおよびキャビティ22cで囲繞されて、空隙24が形成されている。
本実施形態においては、凹面aおよび凸面bの曲率半径Rが、30mm≦R≦100mmであるレンズ注型用鋳型20によって説明する。
重合条件については、光学材料用重合性組成物、触媒の種類と使用量、モールドの形状等によって大きく条件が異なるため限定されるものではないが、およそ、-50~150℃の温度で1~50時間かけて行われる。場合によっては、10~150℃の温度範囲で保持または徐々に昇温して、1~25時間で硬化させることが好ましい。
このようにして得られた成形体はプラスチック眼鏡レンズとして用いることができる。図1に示すように、プラスチックレンズA 10は、曲率半径Rが30mm≦R≦100mmである、凸面14aおよび凹面14bとを備える。
コーティング層は、コーティング材料(組成物)を用いて調製することができ、コーティング材料は紫外線吸収剤(D)を含んでいてもよい。また、コーティング層を形成した後、紫外線吸収剤(D)を水または溶媒中に分散させて得られた分散液に、コーティング層付きプラスチックレンズを浸漬して紫外線吸収剤(D)をコーティング層中に含浸させることにより調製することができる。
本実施形態におけるプラスチックレンズBは、光学材料用重合性組成物からなるレンズ基材表面の少なくとも一方の面上に、フィルムまたは層を備える。得られたプラスチックレンズは、本発明の特性(1)~(3)を満たすように設計される。
プラスチックレンズBの製造方法としては、(1)光学材料用重合性組成物からなるレンズ基材を製造し、次いで当該レンズ基材の少なくとも一方の面上に、フィルムまたはシートを貼り合わせる方法、(2)後述のようなガスケットまたはテープ等で保持された成型モールドのキャビティ内において、フィルムまたはシートをモールドの一方の内壁に沿って配置し、次いでキャビティ内に光学材料用重合性組成物を注入し、硬化させる方法等を挙げることができる。
フィルムまたはシートを、レンズ基材の面上に貼り合わせる方法は公知の方法を用いることができる。
また、本実施形態におけるプラスチックレンズBは、その目的や用途に合わせて、光学材料用重合性組成物からなるレンズ基材上または「フィルムまたは層」上に種々のコーティング層を有していてもよい。プラスチックレンズAと同様に、コーティング層には紫外線吸収剤(D)を含むことができる。
本実施形態におけるプラスチックレンズCは、フィルムの両面上に、本実施形態の光学材料用重合性組成物から得られるレンズ基材が積層されている。得られたプラスチックレンズは、本発明の特性(1)~(3)を満たすように設計される。
プラスチックレンズCの製造方法としては、(1)本実施形態の光学材料用重合性組成物からなるレンズ基材を製造し、フィルムまたはシートの両面上に貼り合わせる方法、(2)ガスケットまたはテープ等で保持された成型モールドのキャビティ内において、フィルムまたはシートを、モールドの内壁から離間した状態で配置し、次いでキャビティ内に本実施形態の光学材料用重合性組成物を注入し、硬化させる方法等を挙げることができる。
プラスチックレンズAの製造方法で用いた、レンズ注型用鋳型の空間内に、フィルムまたはシートを、この両面が、対向するフロント側のモールド内面と並行となるように設置する。
次いで、レンズ注型用鋳型の空間内において、モールドと偏光フィルムとの間の2つの空隙部に、所定の注入手段により、本実施形態の光学材料用重合性組成物を注入する。
また、本実施形態におけるプラスチックレンズCは、その目的や用途に合わせて、レンズ基材上に種々のコーティング層を有していてもよい。プラスチックレンズAと同様に、コーティング層には紫外線吸収剤(D)を含むことができる。
本実施形態のプラスチックレンズを用いて、プラスチック眼鏡レンズを得ることができる。なお、必要に応じて、片面又は両面にコーティング層を施して用いてもよい。
コーティング層としては、プライマー層、ハードコート層、反射防止膜層、防曇コート膜層、防汚染層、撥水層等が挙げられる。これらのコーティング層はそれぞれ単独で用いることも複数のコーティング層を多層化して使用することもできる。両面にコーティング層を施す場合、それぞれの面に同様なコーティング層を施しても、異なるコーティング層を施してもよい。
レンズ注型用鋳型において、第1の面および第2の面の少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmであればよい。
例えば、(1)第1の面が凹面であり、その曲率半径Rが、30mm≦R≦100mmであって、第2の面が略平面である場合、(2)第1の面が凸面であり、その曲率半径Rが、30mm≦R≦100mmであって、第2の面が略平面である場合、(3)第1の面および第2の面がいずれも凹面であり、その両面の曲率半径Rが、30mm≦R≦100mmである場合、(4)第1の面および第2の面がいずれも凸面であり、その両面の曲率半径Rが、30mm≦R≦100mmである場合、を挙げることができる。
例えば、(1)一方の面が凸面であり、その曲率半径Rが、30mm≦R≦100mmであって、他方の面が略平面である場合、(2)一方の面が凹面であり、その曲率半径Rが、30mm≦R≦100mmであって、他方の面が略平面である場合、(3)一方の面および他方の面がいずれも凹面であり、その両面の曲率半径Rが、30mm≦R≦100mmである場合、(4)一方の面および他方の面がいずれも凸面であり、その両面の曲率半径Rが、30mm≦R≦100mmである場合、を挙げることができる。
図2のように、凹面aおよび凸面bの曲率半径Rが、30mm≦R≦100mmであるガラス基材を組み合わせた成型モールドに重合性組成物を注入し、当該組成物を重合させる。得られた成形体と成型モールドの接面へ、クサビ型の離型治具を入れ込み、成形体をモールドから剥がす。成形体およびモールドの破断および破損などの不具合なく離型したものを○と評価した。当該作業時に成形体が破断する、割れたモールドの一部が成形体へと接合している、モールドが破損する等の不具合が観察されたものを×と評価した。
ZelecUN (STEPAN社製、一般式(1)で表される酸性リン酸エステル)0.05重量部、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール(BASF社製 TINUVIN326:最大吸収波長352nm)1.1重量部、ビス(4-イソシアナトシクロへキシル)メタン60.2重量部を20℃で撹拌混合し、均一溶液を得た。この均一溶液に4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン39.8重量部、ジブチル錫(II)ジクロリド0.15重量部を加えて20℃にて撹拌混合し、混合液を得た。この混合液を600Paにて1時間脱泡を行い、1μmPTFEフィルターにて濾過を行った後、成型モールドに注入した。この成型モールドを重合オーブンに入れ、25℃~130℃まで16時間かけて昇温して重合した。重合後、オーブンから取り出して成型モールドを冷却し、成型モールドから離型させ、成形体を得た。離型時に成形体の破断および成型モールドの破損は観察されなかった。成形体は無色透明であった。得られた成型体の紫外-可視光スペクトルを、分光光度計UV-1600(島津製作所社製)を用いて測定した。評価結果を、表-1に示した。
ZelecUN (STEPAN社製)0.05g重量部を0.03重量部に変更した以外は実施例1と同様な方法で成形体を得た。離型時に成形体の破断および成型モールドの破損は観察されなかった。成形体は無色透明であった。得られた成型体の紫外-可視光スペクトルを、分光光度計UV-1600(島津製作所社製)を用いて測定した。評価結果を、表-1に示した。
ZelecUN (STEPAN社製、一般式(1)で表される酸性リン酸エステル)0.03重量部、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール(BASF社製 TINUVIN326:最大吸収波長352nm)0.8重量部、イソホロンジイソシアネート56.1重量部を20℃で撹拌混合し、均一溶液を得た。この均一溶液に4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン43.9重量部、ジメチル錫(II)ジクロリド0.15重量部を加えて20℃にて撹拌混合し、混合液を得た。この混合液を600Paにて1時間脱泡を行い、1μmPTFEフィルターにて濾過を行った後、成型モールドに注入した。この成型モールドを重合オーブンに入れ、25℃~130℃まで16時間かけて昇温して重合した。重合後、オーブンから取り出して成型モールドを冷却し、成型モールドから離型させ、成形体を得た。離型時に成形体の破断および成型モールドの破損は観察されなかった。成形体は無色透明であった。得られた成型体の紫外-可視光スペクトルを、分光光度計UV-1600(島津製作所社製)を用いて測定した。評価結果を、表-1に示した。
ZelecUN (STEPAN社製、一般式(1)で表される酸性リン酸エステル)0.05重量部、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール(BASF社製 TINUVIN326:最大吸収波長352nm)0.8重量部、イソホロンジイソシアネート45.7重量部およびヘキサメチレンジイソシアネート9.1重量部を20℃で撹拌混合し、均一溶液を得た。この均一溶液に4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン45.2重量部、ジメチル錫(II)ジクロリド0.15重量部を加えて20℃にて撹拌混合し、混合液を得た。この混合液を600Paにて1時間脱泡を行い、1μmPTFEフィルターにて濾過を行った後、成型モールドに注入した。この成型モールドを重合オーブンに入れ、25℃~130℃まで16時間かけて昇温して重合した。重合後、オーブンから取り出して成型モールドを冷却し、成型モールドから離型させ、成形体を得た。離型時に成形体の破断および成型モールドの破損は観察されなかった。成形体は無色透明であった。
得られた成型体の紫外-可視光スペクトルを、分光光度計UV-1600(島津製作所社製)を用いて測定した。評価結果を、表-1に示した。
ZelecUN (STEPAN社製、一般式(1)で表される酸性リン酸エステル)0.05重量部、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール(BASF社製 TINUVIN326:最大吸収波長352nm)1.0重量部、2,5-ビス(イソシアナトメチル)-ビシクロ[2,2,1]ヘプタンと2,6-ビス(イソシアナトメチル)-ビシクロ[2,2,1]ヘプタンの混合物54.3重量部を20℃で撹拌混合し、均一溶液を得た。この均一溶液に4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン45.7重量部、ジメチル錫(II)ジクロリド0.05重量部を加えて20℃にて撹拌混合し、混合液を得た。この混合液を600Paにて1時間脱泡を行い、1μmPTFEフィルターにて濾過を行った後、成型モールドに注入した。この成型モールドを重合オーブンに入れ、25℃~130℃まで16時間かけて昇温して重合した。重合後、オーブンから取り出して成型モールドを冷却し、成型モールドから離型させ、成形体を得た。離型時にガラスモールド破損が観察された。
ZelecUN (STEPAN社製、一般式(1)で表される酸性リン酸エステル)0.05重量部、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾール(BASF社製 TINUVIN326:最大吸収波長352nm)0.5重量部、m-キシレンジイソシアネート52.0重量部を20℃で撹拌混合し、均一溶液を得た。この均一溶液に4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン48.0重量部、ジブチル錫(II)ジクロリド0.015重量部を加えて20℃にて撹拌混合し、混合液を得た。この混合液を600Paにて1時間脱泡を行い、1μmPTFEフィルターにて濾過を行った後、成型モールドに注入した。この成型モールドを重合オーブンに入れ、25℃~130℃まで16時間かけて昇温して重合した。重合後、オーブンから取り出して成型モールドを冷却し、成型モールドから離型させ、成形体を得た。離型時にガラスモールド破損が観察された。
m-2: ビス(4-イソシアナトシクロへキシル)メタン
m-3: イソホロンジイソシアネート
m-4: ヘキサメチレンジイソシアネート
実施例1-4の結果から、上記構成に加え、さらに、極大吸収ピークが350nm以上370nm以下の範囲である紫外線吸収剤(D)を用いることにより、400nm~420nmの低波長領域の光を選択的に吸収した。このことから、青色光の遮断効果が改善された光学材料を提供できることが可能となった。
[a1] ポリイソシアネート(A)と、
ポリチオール(B)と、
下記一般式(1)
を含んでなり、
ポリイソシアネート(A)中のイソシアナト基の合計モル数を100モル%とした場合において、2級イソシアナト基が20モル%以上含まれ、
酸性リン酸エステル(C)が、ポリイソシアネート(A)とポリチオール(B)の総重量に対して100~700ppmの量で含まれる、光学材料用重合性組成物。
[a2] ポリイソシアネート(A)が、ビス(4-イソシアナトシクロへキシル)メタン、イソホロンジイソシアネートから選択される少なくとも一種を含む[a1]に記載の光学材料用重合性組成物。
[a3] ポリチオール(B)が、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、ビス(メルカプトエチル)スルフィド、4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン、5,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,8-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、2,5-ジメルカプトメチル-1,4-ジチアン、1,1,3,3-テトラキス(メルカプトメチルチオ)プロパン、4,6-ビス(メルカプトメチルチオ)-1,3-ジチアン、2-(2,2-ビス(メルカプトメチルチオ)エチル)-1,3-ジチエタン、エチレングリコールビス(3-メルカプトプロピオネート)から選択される少なくとも一種である[a1]または[a2]に記載の光学材料用重合性組成物。
[a4] [a1]~[a3]のいずれかに記載の光学材料用重合性組成物を硬化させて得られる成形体。
[a5] [a4]に記載の成形体からなる光学材料。
[a6] [a5]に記載の光学材料からなるプラスチック眼鏡レンズ。
[a7] 少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmである、[a6]に記載のプラスチック眼鏡レンズ。
[a8] [a1]~[a3]のいずれかに記載の光学材料重合性組成物を注型重合する工程を含む、光学材料の製造方法。
Claims (14)
- ポリイソシアネート(A)と、
ポリチオール(B)と、
下記一般式(1)
極大吸収ピークが350nm以上370nm以下の範囲である一種以上の紫外線吸収剤(D)と、を含んでなり、
ポリイソシアネート(A)中のイソシアナト基の合計モル数を100モル%とした場合において、2級イソシアナト基が20モル%以上含まれ、
酸性リン酸エステル(C)が、ポリイソシアネート(A)とポリチオール(B)の総重量に対して100~700ppmの量で含まれる、光学材料用重合性組成物。 - 前記紫外線吸収剤(D)が、ベンゾトリアゾール系化合物から選択された一種である請求項1に記載の光学材料用重合性組成物。
- 前記ベンゾトリアゾール系化合物が、クロロ置換ベンゾトリアゾール系化合物から選択された一種である請求項2に記載の光学材料用重合性組成物。
- 前記クロロ置換ベンゾトリアゾール系化合物が、2-(2-ヒドロキシ-3-t-ブチル-5-メチルフェニル)-クロロベンゾトリアゾールである請求項3に記載の光学材料用重合性組成物。
- 前記紫外線吸収剤(D)は、光学材料用重合性組成物100重量%中に0.1~1.5重量%含まれる、請求項1~4のいずれかに記載の光学材料用重合性組成物。
- ポリイソシアネート(A)が、ビス(4-イソシアナトシクロへキシル)メタン、イソホロンジイソシアネートから選択される少なくとも一種を含む、請求項1~5のいずれかに記載の光学材料用重合性組成物。
- ポリチオール(B)が、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、ビス(メルカプトエチル)スルフィド、4-メルカプトメチル-1,8-ジメルカプト-3,6-ジチアオクタン、5,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,7-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、4,8-ジメルカプトメチル-1,11-ジメルカプト-3,6,9-トリチアウンデカン、2,5-ジメルカプトメチル-1,4-ジチアン、1,1,3,3-テトラキス(メルカプトメチルチオ)プロパン、4,6-ビス(メルカプトメチルチオ)-1,3-ジチアン、2-(2,2-ビス(メルカプトメチルチオ)エチル)-1,3-ジチエタン、エチレングリコールビス(3-メルカプトプロピオネート)から選択される少なくとも一種である、請求項1~6のいずれかに記載の光学材料用重合性組成物。
- 請求項1~7のいずれかに記載の光学材料用重合性組成物を硬化させて得られる成形体。
- 請求項8に記載の成形体からなる光学材料。
- 厚み2mmで測定した光透過率が下記(1)~(3)の特性を満たす、請求項9に記載の光学材料;
(1)波長410nmにおける光透過率が10%以下である。
(2)波長420nmにおける光透過率が70%以下である。
(3)波長440nmにおける光透過率が80%以上である。 - 請求項9または10に記載の光学材料からなるプラスチック眼鏡レンズ。
- 少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmである、請求項11に記載のプラスチック眼鏡レンズ。
- 請求項1~7のいずれかに記載の光学材料重合性組成物を注型重合する工程を含む、光学材料の製造方法。
- プラスチック眼鏡レンズの一方の面を形成するための第1の面を備える第1モールドと、他方の面を形成するための第2の面を備える第2モールドと、これらの面を対向して固定するキャビティと、を備えるレンズ注型用鋳型を用いたプラスチック眼鏡レンズの製造方法であって、
前記第1の面、前記第2の面および前記キャビティで囲繞された空隙内に、請求項1~7のいずれかに記載の光学材料用重合性組成物を注入する工程と、
前記光学材料用重合性組成物を前記空隙内で重合硬化する工程と、
を含み、
前記第1の面および前記第2の面の少なくとも一方の面の曲率半径Rが、30mm≦R≦100mmである、プラスチック眼鏡レンズの製造方法。
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JP7036502B2 (ja) * | 2017-09-29 | 2022-03-15 | ホヤ レンズ タイランド リミテッド | 光学部材用樹脂の製造方法、光学部材用樹脂、眼鏡レンズ及び眼鏡 |
JP7271690B2 (ja) | 2019-12-04 | 2023-05-11 | エルジー・ケム・リミテッド | ポリカーボネート組成物およびこれから形成された光学製品 |
EP3919967A4 (en) | 2020-01-27 | 2022-12-21 | Mitsui Chemicals, Inc. | POLYMERIZABLE COMPOSITION FOR OPTICAL MATERIAL, POLYMERIZABLE PREPOLYMER COMPOSITION FOR OPTICAL MATERIAL, CURED OBJECT, AND METHOD FOR MANUFACTURING OPTICAL MATERIAL |
EP4332140A3 (en) | 2020-01-27 | 2024-04-10 | Mitsui Chemicals, Inc. | Polymerizable composition for optical material, polymerizable prepolymer composition for optical material, cured product, and method of producing optical material |
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CN111352253A (zh) * | 2020-03-18 | 2020-06-30 | 江苏新视客光电科技有限公司 | 一种1.591折射率pc防蓝光镜片及其制备方法 |
WO2023176153A1 (ja) * | 2022-03-18 | 2023-09-21 | 三井化学株式会社 | ポリチオウレタンフィルム、メガネレンズ用資材、メガネレンズ及びメガネレンズの製造方法 |
Also Published As
Publication number | Publication date |
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KR20160083911A (ko) | 2016-07-12 |
EP3081966A4 (en) | 2017-08-02 |
EP3081966A1 (en) | 2016-10-19 |
US20160313575A1 (en) | 2016-10-27 |
CN105793738A (zh) | 2016-07-20 |
JPWO2015088013A1 (ja) | 2017-03-16 |
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