WO2017163794A1 - チオール化合物を含有する新規光学材料用組成物 - Google Patents
チオール化合物を含有する新規光学材料用組成物 Download PDFInfo
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- C07C321/00—Thiols, sulfides, hydropolysulfides or polysulfides
- C07C321/02—Thiols having mercapto groups bound to acyclic carbon atoms
- C07C321/10—Thiols having mercapto groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing rings
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- C07C321/02—Thiols having mercapto groups bound to acyclic carbon atoms
- C07C321/08—Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic unsaturated carbon skeleton
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- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
- C07C323/10—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and singly-bound oxygen atoms bound to the same carbon skeleton
- C07C323/11—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and singly-bound oxygen atoms bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
- C07C323/16—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and singly-bound oxygen atoms bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton containing six-membered aromatic rings
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- 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
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- 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
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- 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
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- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/7642—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group 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
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
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- 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
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/04—Polythioethers from mercapto compounds or metallic derivatives thereof
- C08G75/045—Polythioethers from mercapto compounds or metallic derivatives thereof from mercapto compounds and unsaturated compounds
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- 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
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/06—Polythioethers from cyclic thioethers
- C08G75/08—Polythioethers from cyclic thioethers from thiiranes
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- C08G75/12—Polythioether-ethers
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
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- 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
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- 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
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- C07—ORGANIC CHEMISTRY
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- C07D331/00—Heterocyclic compounds containing rings of less than five members, having one sulfur atom as the only ring hetero atom
- C07D331/02—Three-membered rings
Definitions
- the present invention relates to optical materials such as plastic lenses, prisms, optical fibers, information recording bases, filters, and the like, and compositions for optical materials suitable for plastic lenses, among others.
- a method using an episulfide compound is known from the viewpoint of physical properties for optical materials, particularly spectacle lenses (Patent Document 1). Further, as a method for further improving the physical properties, for example, a composition in which a thiol compound is added to an episulfide compound in order to improve weather resistance (Patent Document 2), and from sulfur, episulfide and thiol for further increasing the refractive index. The composition which becomes is proposed (patent documents 3 and 4).
- the problem to be solved by the present invention is to provide a composition for an optical material capable of stably storing a thiol compound and obtaining an optical material having good transparency and weather resistance.
- the present inventors have solved the problem with a composition for optical materials having a specific composition containing polythiol, and have reached the present invention. That is, the present invention is as follows.
- p and q each independently represent an integer of 1 to 3.
- p and q each independently represent an integer of 1 to 3.
- the ratio of the polythiol (A) is 93.0 to 99.999% by mass, and the ratio of the thiol compound (B) is in the range of 0.001 to 7.0% by mass.
- Polythiol composition is 93.0 to 99.999% by mass, and the ratio of the thiol compound (B) is in the range of 0.001 to 7.0% by mass.
- the polythiol (A) is one or more selected from the group consisting of 1,2-bis (mercaptomethyl) benzene, 1,3-bis (mercaptomethyl) benzene, and 1,4-bis (mercaptomethyl) benzene
- a composition for optical materials comprising the polythiol composition according to any one of [1] to [3] and a polymerizable compound (C).
- m represents an integer of 0 to 4
- n represents an integer of 0 to 2.
- composition for optical materials according to any one of [4] to [6], wherein 0.0001 to 10 parts by mass of a polymerization catalyst is further added to 100 parts by mass of the composition for optical materials.
- composition of the present invention makes it possible to provide a composition for an optical material that can stably store a thiol compound and obtain an optical material having good transparency and weather resistance.
- polythiol (A) The polythiol (A) used in the present invention is a compound represented by the following formula (1). (In the formula, p and q each independently represent an integer of 1 to 3.)
- Preferred specific examples of the polythiol (A) from the viewpoint of weather resistance include 1,2-bis (mercaptomethyl) benzene, 1,2-bis (mercaptoethyl) benzene, 1,3-bis (mercaptomethyl) benzene, 1, Examples include 3-bis (mercaptoethyl) benzene, 1,4-bis (mercaptomethyl) benzene, and 1,4-bis (mercaptoethyl) benzene.
- Specific examples of more preferred compounds are 1,2-bis (mercaptomethyl) benzene, 1,3-bis (mercaptomethyl) benzene and 1,4-bis (mercaptomethyl) benzene, and the most preferred compounds are 1, 3-bis (mercaptomethyl) benzene. These may be used alone or in combination of two or more, and commercially available products can be easily obtained.
- the thiol compound (B) used in the present invention is a compound represented by the following formula (2).
- p and q each independently represent an integer of 1 to 3.
- p and q are each independently an integer of 1 to 3, preferably p and q are each independently an integer of 1 to 2, and most preferably p and q are 1. is there.
- the compound represented by Formula (2) may be used alone or in combination of two or more.
- thiol compound (B) examples include (2- (mercaptomethyl) phenyl) methanol, (3- (mercaptomethyl) phenyl) methanol, (4- (mercaptomethyl) phenyl) methanol, 2- (2- ( 2-mercaptoethyl) phenyl) ethane-1-ol, 2- (3- (2-mercaptoethyl) phenyl) ethane-1-ol, and 2- (4- (2-mercaptoethyl) phenyl) ethane-1- Oars.
- a thiol compound (B) is not specifically limited, It can synthesize
- a compound represented by the following formula (4) is obtained by a reaction between a halogen compound and a thiating agent, and then the obtained compound represented by the formula (4) is reacted with an alkali.
- X represents a halogen atom
- p and q each independently represents an integer of 1 to 3.
- the polythiol composition of the present invention contains a polythiol (A) and a thiol compound (B).
- the ratio of polythiol (A) is preferably 93.0 to 99.999% by mass, more preferably 97.0 to 9.995% by mass.
- the proportion of the thiol compound (B) is preferably 0.001 to 7.0% by mass, and more preferably 0.005 to 3.0 parts by mass. By being in this range, the storage stability of the polythiol composition can be improved.
- the polythiol composition can be prepared, for example, by mixing a predetermined amount of polythiol (A) and thiol compound (B) until they are uniform.
- the polymerizable compound (C) used in the present invention is a polymerizable compound, and specifically includes an episulfide compound, a vinyl compound, a methacryl compound, an acrylic compound, and an allyl compound. From the viewpoint of optical properties, an episulfide compound is preferable, and a compound represented by the following formula (3) is more preferable.
- n represents an integer of 0 to 2.
- Specific examples of the compound represented by the formula (3) include bis ( ⁇ -epithiopropyl) sulfide, bis ( ⁇ -epithiopropyl) disulfide, bis ( ⁇ -epithiopropylthio) methane, 1,2- Examples include episulfides such as bis ( ⁇ -epithiopropylthio) ethane, 1,3-bis ( ⁇ -epithiopropylthio) propane, and 1,4-bis ( ⁇ -epithiopropylthio) butane.
- the compound represented by Formula (3) may be used alone or in combination of two or more. These compounds can be synthesized according to a known method, and for example, a method described in JP-A-9-110979 is known.
- composition for optical materials of the present invention contains the polythiol composition and the polymerizable compound (C).
- the proportion of the polythiol composition in the composition for optical materials is preferably 0.001 to 60% by mass, more preferably 2.0 to 40% by mass.
- the proportion of the polymerizable compound (C) is preferably 40 to 99.999% by mass, more preferably 60 to 98% by mass. By being in this range, the transparency and weather resistance of the cured product can be improved.
- the composition for optical materials of the present invention may contain a polyisocyanate compound as a polymerizable compound in order to improve the strength of the obtained resin.
- the content of the polyisocyanate compound is usually 1 to 25% by mass, preferably 2 to 25% by mass, particularly preferably 5 to 20% by mass, when the total composition for optical materials is 100% by mass. is there.
- the content of the polyisocyanate compound is less than 1% by mass, the strength may decrease, and when it exceeds 25% by mass, the color tone may decrease.
- the polyisocyanate compound used in the present invention may be used alone or in combination of two or more. Preferred compounds are isophorone diisocyanate, m-xylylene diisocyanate, and 1,3-bis (isocyanatomethyl) cyclohexane.
- the composition for optical materials of the present invention may contain sulfur as a polymerizable compound in order to improve the refractive index of the obtained resin.
- the content of sulfur is usually 0.1 to 15% by mass, preferably 0.2 to 10% by mass, particularly preferably 0.3% when the total composition for optical materials is 100% by mass. ⁇ 5% by mass.
- a polymerization catalyst As the polymerization catalyst, amine, phosphine, onium salt and the like are used. Preferred polymerization catalysts are tetra-n-butylammonium bromide, triethylbenzylammonium chloride, and tetra-n-butylphosphonium bromide.
- the addition amount of the polymerization catalyst is usually preferably 0.0001 to 10 parts by mass, more preferably 0.001 to 5.0 parts by mass with respect to 100 parts by mass in total of the composition for optical materials before the addition of the polymerization catalyst. Even more preferably, it is 0.01 to 1.0 part by weight, and most preferably 0.01 to 0.5 part by weight.
- the addition amount of the polymerization catalyst is more than 10 parts by mass, polymerization may occur rapidly.
- the addition amount of the polymerization catalyst is less than 0.0001 part by mass, the composition for optical materials may not be sufficiently cured and the heat resistance may be poor.
- additives such as an ultraviolet absorber, a bluing agent, a pigment, and a polymerization regulator are added to the composition for optical material, and the practicality of the obtained optical material is further improved. Of course, it can be improved.
- composition for an optical material by mixing polythiol (A), a thiol compound (B), a polymerizable compound (C) and, if necessary, specific amounts of a polyisocyanate compound, sulfur, a polymerization catalyst and additives until uniform. To prepare. It is preferable from the viewpoint of the quality of the optical material of the present invention to remove impurities with a filter having a pore diameter of about 1 to 5 ⁇ m.
- the polymerization of the composition for optical materials of the present invention is usually performed as follows. That is, the curing time is usually 1 to 100 hours, and the curing temperature is usually ⁇ 10 ° C. to 140 ° C.
- the polymerization is carried out by a step of holding at a predetermined polymerization temperature for a predetermined time, a step of raising the temperature from 0.1 ° C. to 100 ° C./h, a step of lowering the temperature from 0.1 ° C. to 100 ° C./h, Do it in combination.
- annealing the obtained optical material at a temperature of 50 to 150 ° C. for about 10 minutes to 5 hours is a preferable treatment for removing the distortion of the optical material of the present invention.
- the obtained optical material may be subjected to a surface treatment such as dyeing, hard coating, impact resistant coating, antireflection or imparting antifogging properties as necessary.
- a composition was prepared by mixing a1 with b1 in the amount shown in Table 4, and stored at 60 ° C. for 1 week in a nitrogen atmosphere.
- c1 bis ( ⁇ -epithiopropyl) sulfide
- 2- (2-hydroxy-5-t-) the polymerizable compound (C)
- the mixture was mixed well at 20 ° C. to make uniform.
- the temperature was raised to 100 ° C. at a constant rate over 10 hours, and finally heated at 100 ° C. for 1 hour to be cured by polymerization. After standing to cool, it was released from the mold and annealed at 110 ° C. for 60 minutes to obtain a molded plate (a 3.0 mm thick flat plate and a ⁇ 4D lens).
- the color tone and weather resistance of the flat plate were evaluated, and the results of the transparency of the -4D lens are shown in Table 4.
- Example 22 to 28 A composition was prepared by mixing a2 with b2 in the amount shown in Table 4, and stored at 60 ° C. for 1 week in a nitrogen atmosphere. 93 parts by mass of c1 in 7 parts by mass of the composition, 1.0 part by mass of 2- (2-hydroxy-5-t-octylphenyl) -2H-benzotriazole as an ultraviolet absorber, and tetra-n-as a polymerization catalyst After adding 0.05 part by mass of butylphosphonium bromide, it was mixed well at 20 ° C. to make it uniform.
- the temperature was raised to 100 ° C. at a constant rate over 10 hours, and finally heated at 100 ° C. for 1 hour to be cured by polymerization. After standing to cool, it was released from the mold and annealed at 110 ° C. for 60 minutes to obtain a molded plate (a 3.0 mm thick flat plate and a ⁇ 4D lens).
- the color tone and weather resistance of the flat plate were evaluated, and the results of the transparency of the -4D lens are shown in Table 4.
- Example 29 to 35 A composition was prepared by mixing a1 with b1 in the amount shown in Table 4, and stored at 60 ° C. for 1 week in a nitrogen atmosphere. 7 parts by mass of the composition, 93 parts by mass of bis ( ⁇ -epithiopropyl) disulfide (hereinafter “c2”) as the polymerizable compound (C), and 2- (2-hydroxy-5-t as an ultraviolet absorber -Octylphenyl) -2H-benzotriazole (1.0 part by mass) and 0.05 parts by mass of tetra-n-butylphosphonium bromide as a polymerization catalyst were added and mixed well at 20 ° C. to make uniform.
- c2 bis ( ⁇ -epithiopropyl) disulfide
- 2- (2-hydroxy-5-t as an ultraviolet absorber -Octylphenyl) -2H-benzotriazole
- 0.05 parts by mass of tetra-n-butylphosphonium bromide
- the temperature was raised to 100 ° C. at a constant rate over 10 hours, and finally heated at 100 ° C. for 1 hour to be cured by polymerization. After standing to cool, it was released from the mold and annealed at 110 ° C. for 60 minutes to obtain a molded plate (a 3.0 mm thick flat plate and a ⁇ 4D lens).
- the color tone and weather resistance of the flat plate were evaluated, and the results of the transparency of the -4D lens are shown in Table 4.
- Examples 36 to 42 A composition was prepared by mixing a2 with b2 in the amount shown in Table 4, and stored at 60 ° C. for 1 week in a nitrogen atmosphere. In 7 parts by mass of the composition, 93 parts by mass of c2, as a UV absorber, 1.0 part by mass of 2- (2-hydroxy-5-t-octylphenyl) -2H-benzotriazole, and as a polymerization catalyst, tetra-n- After adding 0.05 part by mass of butylphosphonium bromide, it was mixed well at 20 ° C. to make it uniform.
- the temperature was raised to 100 ° C. at a constant rate over 10 hours, and finally heated at 100 ° C. for 1 hour to be cured by polymerization. After standing to cool, it was released from the mold and annealed at 110 ° C. for 60 minutes to obtain a molded plate (a 3.0 mm thick flat plate and a ⁇ 4D lens).
- the color tone and weather resistance of the flat plate were evaluated, and the results of the transparency of the -4D lens are shown in Table 4.
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Abstract
Description
すなわち、本発明は以下の通りである。
本発明で用いられるチオール化合物(B)は、下記式(2)で表される化合物である。
式(2)中、p、qは、それぞれ独立して1~3の整数であり、好ましくはp、qはそれぞれ独立して1~2の整数であり、最も好ましくはp、qが1である。式(2)で表される化合物は単独でも、2種類以上を混合して用いてもかまわない。
チオール化合物(B)の好ましい具体例として、(2-(メルカプトメチル)フェニル)メタノール、(3-(メルカプトメチル)フェニル)メタノール、(4-(メルカプトメチル)フェニル)メタノール、2-(2-(2-メルカプトエチル)フェニル)エタン-1-オール、2-(3-(2-メルカプトエチル)フェニル)エタン-1-オール、及び2-(4-(2-メルカプトエチル)フェニル)エタン-1-オールが挙げられる。さらに好ましい化合物の具体例としては、(2-(メルカプトメチル)フェニル)メタノール、(3-(メルカプトメチル)フェニル)メタノール、及び(4-(メルカプトメチル)フェニル)メタノールであり、最も好ましい化合物は(3-(メルカプトメチル)フェニル)メタノールである。
チオール化合物(B)の製造方法は特に限定されず公知の手法に従って適宜合成できる。
合成例の1例として、ハロゲン化合物と、チア化剤との反応で下記式(4)で表される化合物を得た後、次いで得られた式(4)で表される化合物をアルカリと反応させ加水分解を行うことで、式(2)で表される化合物を得る方法が挙げられる。
本発明のポリチオール組成物は、ポリチオール(A)とチオール化合物(B)を含有する。
ポリチオール(A)の割合は、93.0~99.999質量%が好ましく、より好ましくは97.0~9.995質量%である。一方、チオール化合物(B)の割合は0.001~7.0質量%が好ましく、より好ましくは0.005~3.0質量部の範囲である。この範囲にあることで、ポリチオール組成物の保存安定性を改善することができる。
ポリチオール組成物は例えば、所定量のポリチオール(A)とチオール化合物(B)を均一になるまで混合することで調製することができる。
本発明で用いられる重合性化合物(C)は重合可能な化合物であり、具体的にはエピスルフィド化合物、ビニル化合物、メタクリル化合物、アクリル化合物、及びアリル化合物が挙げられる。光学特性の観点より好ましくはエピスルフィド化合物であり、より好ましくは下記式(3)で表される化合物である。
式(3)で表される化合物の具体例としては、ビス(β-エピチオプロピル)スルフィド、ビス(β-エピチオプロピル)ジスルフィド、ビス(β-エピチオプロピルチオ)メタン、1,2-ビス(β-エピチオプロピルチオ)エタン、1,3-ビス(β-エピチオプロピルチオ)プロパン、1,4-ビス(β-エピチオプロピルチオ)ブタンなどのエピスルフィド類が挙げられる。中でも好ましい化合物は、ビス(β-エピチオプロピル)スルフィド(式(3)でn=0)、ビス(β-エピチオプロピル)ジスルフィド(式(3)でm=0、n=1)であり、透明性が優れるため最も好ましい化合物は、ビス(β-エピチオプロピル)スルフィド(式(3)でn=0)である。式(3)で表される化合物は単独でも、2種類以上を混合して用いてもかまわない。これらの化合物は、公知の手法に従って合成でき、例えば、特開平9-110979に記載の方法が知られている。
本発明の光学材料用組成物は、前記ポリチオール組成物及び重合性化合物(C)を含有する。
光学材料用組成物中のポリチオール組成物の割合は、0.001~60質量%が好ましく、より好ましくは2.0~40質量%である。一方、重合性化合物(C)の割合は40~99.999質量%が好ましく、より好ましくは60~98質量%である。この範囲にあることで、硬化物の透明性・耐候性を改善することができる。
ポリチオール(A)、チオール化合物(B)、重合性化合物(C)及び必要に応じてポリイソシアネート化合物、硫黄、重合触媒及び添加剤の特定量を均一になるまで混合して、光学材料用組成物を調製する。1~5μm程度の孔径のフィルター等で不純物を除去することが、本発明の光学材料の品質の点から好ましい。
また、硬化終了後、得られた光学材料を50~150℃の温度で10分~5時間程度アニール処理を行うことは、本発明の光学材料の歪を除くために好ましい処理である。さらに得られた光学材料に対して、必要に応じて染色、ハードコート、耐衝撃性コート、反射防止、防曇性付与等の表面処理を行ってもよい。
[1.安定性]
窒素雰囲気下60℃で1週間、光学材料組成物中のチオール化合物の純度変化をGPC分析(島津製作所製HPLCユニットProminence社製)で追跡し、純度低下が0.1%以上1%未満をA、1%以上3%未満をB、3%以上5%未満をC、5%以上10%未満をD、10%以上15%未満をEとした。A、B、C、及びDが合格レベルである。
以下の実施例および比較例に記載の方法で、-4Dのレンズを10枚作製し、暗室内で蛍光灯下、観察した。すべて白濁が観測されないものをA、7から9枚白濁が観測されないものをB、白濁が観測されないものが6枚以下をCとした。A及びBが合格レベルである。
(1)初期値の測定
3.0mm厚の平板を作製し、カラーテクノシステム社製色彩計JS-555を用い、YI値を測定した。この値をpとする。
(2)光による色調変化の測定
初期値を測定後、カーボンアーク燃焼光に60時間照射し、その後YI値を測定した。この値をqとする。(q-p)/pの値を算出し、この値が1.0未満をA、1.0以上2.0未満をB、2.0以上をCとした。A及びBが合格レベルである。
攪拌機、還流冷却管、窒素ガスパージ管、および温度計を取り付けた1L4つ口反応フラスコ内に、1,3-ビス(クロロメチル)ベンゼン24.7g、チオ尿素5.3g、水90gを混合し、5時間加熱還流を行った。室温に冷却した後、窒素雰囲気下で、50%苛性ソーダ水溶液を44.7g加え、2時間加熱還流を行った。次いで、反応液を40℃に冷却し、塩酸をpHが2~3になるまで加え、そのまま30分間攪拌して中和した。反応終了後、トルエン120mLで抽出を行った後、加熱減圧下でトルエンおよび微量の水分を除去した。その後、水洗した。加熱減圧を行って水分を除去した後にろ過した。その後、カラムで精製し、(3-(メルカプトメチル)フェニル)メタノール(以下、「b1」)6.3gを得た。ここで得られた化合物の同定データを表1及び式(5)に示す。
攪拌機、還流冷却管、窒素ガスパージ管、および温度計を取り付けた1L4つ口反応フラスコ内に、1,4-ビス(2-クロロエチル)ベンゼン28.4g、チオ尿素5.3g、水90gを混合し、5時間加熱還流を行った。室温に冷却した後、窒素雰囲気下で、50%苛性ソーダ水溶液を44.7g加え、2時間加熱還流を行った。次いで、反応液を40℃に冷却し、塩酸をpHが2~3になるまで加え、そのまま30分間攪拌して中和した。反応終了後、トルエン120mLで抽出を行った後、加熱減圧下でトルエンおよび微量の水分を除去した。その後、水洗した。加熱減圧を行って水分を除去した後にろ過した。その後、カラムで精製し、2-(4-(2-メルカプトエチル)フェニル)エタン-1-オール(以下、「b2」)5.1gを得た。ここで得られた化合物の同定データを表2及び式(6)に示す。
1,3-ビス(メルカプトメチル)ベンゼン(以下、「a1」)に(3-(メルカプトメチル)フェニル)メタノール(b1)を表3に示す量添加し、安定性を評価した。結果を表3に示す。
1,4-ビス(2-メルカプトエチル)ベンゼン(以下、「a2」)に2-(4-(2-メルカプトエチル)フェニル)エタン-1-オール(b2)を表3に示す量添加し、安定性を評価した。結果を表3に示す。
a1のみの安定性を評価した。結果を表3に示す。
a2のみの安定性を評価した。結果を表3に示す。
a1にb1を表4に示す量で混合した組成物を調製し、窒素雰囲気下60℃で1週間保管した。前記組成物7質量部に重合性化合物(C)としてビス(β-エピチオプロピル)スルフィド(以下、「c1」)93質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。
ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
c1の93質量部に、窒素雰囲気下60℃で1週間保管したa1を7質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
a2にb2を表4に示す量で混合した組成物を調製し、窒素雰囲気下60℃で1週間保管した。前記組成物7質量部にc1を93質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
c1の93質量部に、窒素雰囲気下60℃で1週間保管したa2を7質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
a1にb1を表4に示す量で混合した組成物を調製し、窒素雰囲気下60℃で1週間保管した。前記組成物7質量部に、重合性化合物(C)としてビス(β-エピチオプロピル)ジスルフィド(以下、「c2」)93質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。
ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
c2の93質量部に、窒素雰囲気下60℃で1週間保管したa1を7質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
a2にb2を表4に示す量で混合した組成物を調製し、窒素雰囲気下60℃で1週間保管した。前記組成物7質量部にc2を93質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
c2の93質量部に、窒素雰囲気下60℃で1週間保管したa2を7質量部、紫外線吸収剤として、2-(2-ヒドロキシ-5-t-オクチルフェニル)-2H-ベンゾトリアゾール1.0質量部、重合触媒としてテトラ-n-ブチルホスホニウムブロマイド0.05質量部を添加後、20℃でよく混合し均一とした。ついで1.3kPaの真空度で脱気を行い、2枚のガラス板とテープから構成されるモールド(3.0mm厚の平板用および-4Dのレンズ用)へ注入し、30℃で10時間加熱し、100℃まで10時間かけて一定速度で昇温させ、最後に100℃で1時間加熱し、重合硬化させた。放冷後、モールドから離型し、110℃で60分アニール処理して成型板(3.0mm厚の平板および-4Dのレンズ)を得た。平板について色調および耐候性評価を行い、-4Dレンズの透明性の結果と共に表4に示す。
Claims (9)
- 前記ポリチオール(A)の割合が93.0~99.999質量%であり、前記チオール化合物(B)の割合が0.001~7.0質量%の範囲にある請求項1に記載のポリチオール組成物。
- 前記ポリチオール(A)が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)ベンゼン及び1,4-ビス(メルカプトメチル)ベンゼンからなる群より選ばれる1以上である請求項1又は2に記載のポリチオール組成物。
- 請求項1~3のいずれか一項に記載のポリチオール組成物及び、重合性化合物(C)を含有する光学材料用組成物。
- 前記重合性化合物(C)の割合が40~99.999質量%の範囲にある請求項4または5に記載の光学材料用組成物。
- さらに前記光学材料用組成物100質量部に対して重合触媒0.0001~10質量部が添加されてなる、請求項4~6のいずれか一項に記載の光学材料用組成物。
- 請求項7に記載の光学材料用組成物を硬化した硬化物。
- 請求項8に記載の硬化物を含有する光学レンズ。
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JPWO2020080391A1 (ja) * | 2018-10-17 | 2021-10-14 | ナミックス株式会社 | 樹脂組成物 |
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US10047043B2 (en) | 2018-08-14 |
KR101869785B1 (ko) | 2018-06-22 |
CN107531906B (zh) | 2018-12-04 |
EP3266809B1 (en) | 2018-09-26 |
EP3266809A1 (en) | 2018-01-10 |
TWI656112B (zh) | 2019-04-11 |
TW201802068A (zh) | 2018-01-16 |
US20180079719A1 (en) | 2018-03-22 |
KR20170122276A (ko) | 2017-11-03 |
EP3266809A4 (en) | 2018-01-31 |
CN107531906A (zh) | 2018-01-02 |
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