Environmental load value fluctuation token arithmetic unit, optical member manufacturing system, and environmental load value fluctuation token arithmetic method

Abstract

To provide an environmental load value variation token calculation device, an optical member manufacturing system, and an environmental load value variation token calculation method which can calculate a token according to variation in an environmental load value in optical member manufacture of polymerizing a composition containing a polymerizable compound for an optical material and a polymerization catalyst.SOLUTION: A first acquisition part 102 acquires first energy amount information indicating an energy amount charged into a polymerization part in optical member manufacture. A second acquisition part 104 acquires second energy amount information indicating an energy amount charged so as to maintain a temperature of a space where the polymerization part is arranged in the optical member manufacture. A third acquisition part 106 acquires yield information of the optical member manufactured by the optical member manufacture. A calculation part 108 calculates a variation token according to a variation amount of environmental load values, from an environmental load value A calculated by the first energy amount information, the second energy amount information and the yield information, and an environmental load value B generated under an optical member manufacturing condition by prescribed polymerization.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an environmental load value fluctuation token calculation device, an optical member manufacturing system, and an environmental load value fluctuation token calculation method.

Background Art

[0002] Recently, due to the problem of global warming, technologies for suppressing environmental loads have been studied. For example, there is a CO2 reduction credit calculation system that reduces CO2 using waste water grease and calculates CO2 reduction credits based on this (see Patent Document 1). In this system, the amount of CO2 reduction is calculated using the input information, and CO2 reduction credits are calculated based on the amount of CO2 reduction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, attention is paid to the method for manufacturing a resin used for an optical material for a plastic lens. For example, in the casting polymerization method in which a polymerizable composition containing a monomer is injected into a mold (die) and heat-cured, although the environmental load changes by changing the manufacturing process and manufacturing conditions, the amount of change in the environmental load is not calculated. Further, when tokens corresponding to the amount of change in the environmental load can be obtained, it is not possible to obtain in advance how many tokens will be obtained.

[0005] The problem to be solved by one embodiment of the present disclosure is to provide an environmental load value fluctuation token calculation device, an optical member manufacturing system, and an environmental load value fluctuation token calculation method capable of calculating a token corresponding to fluctuations in the environmental load value in the manufacture of an optical member by polymerizing a composition containing a polymerizable compound for an optical material and a polymerization catalyst.

Means for Solving the Problem

[0006] Specific means for solving the above problems include the following aspects. <1> An environmental load value fluctuation token calculation device for calculating an environmental load value fluctuation token in the manufacture of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, a first acquisition unit that acquires first energy amount information indicating the amount of energy input to the polymerization unit in the manufacture of the optical member; a second acquisition unit that acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space where the polymerization unit in the manufacture of the optical member is disposed; a third acquisition unit that acquires yield information of the optical member manufactured by the optical member manufacture; an arithmetic unit that calculates a fluctuation token corresponding to the amount of fluctuation of the environmental load value from the environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and the environmental load value B generated under the optical member manufacturing conditions by a given polymerization different from the optical member manufacturing; An environmental load value fluctuation token calculation device comprising: <2> The arithmetic unit (1) The amount of fluctuation of the environmental load value calculated from the difference between the given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical member, the environmental load value required for manufacturing one polymerization part, and the environmental load value required for storing one polymerization part, (2) The amount of fluctuation of the environmental load value calculated from the difference between the number of temperature adjustment devices for a given polymerization part and the number of temperature adjustment devices for the polymerization part used in the manufacture of the optical member, the environmental load value required for manufacturing one temperature adjustment device, and the environmental load value due to the exhaust heat of one temperature adjustment device, and (3) The amount of variation in the environmental load value calculated from the environmental load value required for processing a given optical member and the environmental load value required for processing the optical member manufactured by manufacturing the optical member at least one of the environmental load value A, the environmental load value B, to calculate the variation token, the environmental load value variation token calculation device according to <1>. <3> The calculation unit calculates the environmental load value A from the first energy amount information, the second energy amount information, the yield information, and the amount of cutting waste generated when processing the optical member manufactured in the polymerization unit in the manufacture of the optical member, the environmental load value variation token calculation device according to <1> or <2>. <4> The first energy amount information and the second energy amount information indicate the energy amount per one optical member, the environmental load value variation token calculation device according to any one of <1> to <3>. <5> The environmental load value variation token calculation device according to any one of <1> to <4>, further comprising an additional giving unit that gives an additional token when the environmental load value variation token calculated by the calculation unit exceeds a given token value. <6> The method for manufacturing an optical member according to any one of <1> to <5>, wherein the viscosity measured by a B-type viscometer of the polymerizable composition for an optical material in the casting step at 25°C and 60 rpm is 10 mPa·s to 1000 mPa·s. <7> The composition contains a prepolymer obtained by polymerizing at least two polymerizable compounds for optical materials among the two or more different polymerizable compounds for optical materials, and the content of the polymerization catalyst is 0.010 parts by mass to 2.0 parts by mass with respect to a total of 100 parts by mass of the two or more different polymerizable compounds for optical materials and the prepolymer, the environmental load value variation token calculation device according to any one of <1> to <6>. <8> The environmental load value fluctuation token arithmetic device according to any one of <1> to <7>, wherein one polymerizable compound for an optical material contains at least one compound selected from the group consisting of a polyisocyanate compound, an episulfide compound, and an epoxy compound. <9> The environmental load value fluctuation token arithmetic device according to any one of <1> to <8>, wherein the other polymerizable compound for an optical material contains at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound. <10> The environmental load value fluctuation token arithmetic device according to any one of <1> to <9>, wherein the polymerization catalyst contains at least one selected from the group consisting of a basic catalyst having a pKa value of 4 to 8 and an organometallic catalyst. <11> The environmental load value fluctuation token arithmetic device according to any one of <1> to <10>, further comprising a manufacturing condition determination unit that determines manufacturing conditions in the manufacture of the optical member so that the calculated fluctuation token becomes a given value or more based on the calculated fluctuation token. <12> The environmental load value fluctuation token arithmetic device according to <11>, An optical member manufacturing system including a manufacturing condition control device that controls manufacturing conditions in the manufacture of the optical member so as to be the determined manufacturing conditions. An optical member manufacturing system including a manufacturing condition control device that controls manufacturing conditions in the manufacture of the optical member so as to be the determined manufacturing conditions. <13> An environmental load value fluctuation token arithmetic method in an environmental load value fluctuation token arithmetic device that calculates an environmental load value fluctuation token in the manufacture of an optical member by polymerizing a composition containing two or more different polymerizable compounds for an optical material and a polymerization catalyst, A first acquisition unit acquires first energy amount information indicating an energy amount input to a polymerization unit in the manufacture of the optical member. A second acquisition unit acquires second energy amount information indicating an energy amount input to maintain the temperature of a space in which the polymerization unit in the manufacture of the optical member is disposed. A third acquisition unit acquires yield information of an optical member manufactured by the manufacture of the optical member. The calculation unit calculates a variation token according to the variation amount of the environmental load value from the environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and the environmental load value B generated under the optical member manufacturing conditions by a given polymerization different from the optical member manufacturing. Method for calculating environmental load value variation token.

Advantages of the Invention

[0007] According to an embodiment of the present disclosure, it is possible to provide an environmental load value variation token calculation device, an optical member manufacturing system, and a method for calculating an environmental load value variation token that can calculate a token according to the variation of the environmental load value in the manufacture of an optical member by polymerizing a composition containing a polymerizable compound for an optical material and a polymerization catalyst.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

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Figure 6

Modes for Carrying Out the Invention

[0009] In the present disclosure, a numerical range represented using "~" means a range including the numerical values described before and after "~" as the lower limit value and the upper limit value. In the present disclosure, the amount of each component in the composition means the total amount of the plurality of substances present in the composition when there are a plurality of substances corresponding to each component in the composition, unless otherwise specified. In the numerical ranges described stepwise in the present disclosure, the upper limit value or the lower limit value described in one numerical range may be replaced with the upper limit value or the lower limit value of the numerical range described in other stepwise descriptions. Also, in the numerical ranges described in the present disclosure, the upper limit value or the lower limit value of the numerical range may be replaced with the value shown in the examples. In the present disclosure, the term "step" includes not only an independent step but also cases where it cannot be clearly distinguished from other steps, as long as the intended purpose of the step is achieved.

[0010] [First Embodiment] <Overview of this Embodiment> In this embodiment, a token corresponding to the amount of change in the environmental load value in the manufacture of an optical member employing a short-time polymerization process is calculated. At this time, using the amount of energy input to the polymerization part in the manufacture of the optical member, the amount of energy input to maintain the temperature of the space where the polymerization part is arranged, the yield information of the optical member manufactured by the manufacture of the optical member, etc., an environmental load value change token is calculated. Here, the environmental load value change token is something that substitutes for the amount of change in the environmental load value with some other value, for example, electronic currency.

[0011] <Configuration of the Environmental Load Value Change Token Calculation Device According to this Embodiment> FIG. 1 is a block diagram showing an example of the functional configuration of the environmental load value change token calculation device 100 of this embodiment.

[0012] Functionally, the environmental load value change token calculation device 100 includes a first acquisition unit 102, a second acquisition unit 104, a third acquisition unit 106, a calculation unit 108, and a manufacturing condition determination unit 110, as shown in FIG. 1. The first acquisition unit 102 acquires first energy amount information indicating the amount of energy input to the polymerization unit in the production of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst. Specifically, the first energy amount information indicating the amount of energy per optical member input to the polymerization unit in the production of the optical member, which is input by the user, is acquired. The second acquisition unit 104 acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space where the polymerization unit is disposed in the production of the optical member. Specifically, the second energy amount information indicating the amount of energy per optical member input to maintain the temperature of the space where the polymerization unit is disposed in the production of the optical member, which is input by the user, is acquired. The third acquisition unit 106 acquires yield information of the optical member produced by the production of the optical member. Specifically, the yield information of the optical member produced by the production of the optical member, which is input by the user, is acquired. Here, as the first energy amount information, the second energy amount information, and the yield information, information obtained from the production results, production experiments, or production simulations in the production of the optical member may be used.

[0013] The calculation unit 108 calculates an environmental load value A in the production of the optical member from the first energy amount information, the second energy amount information, and the yield information. Specifically, the calculation unit 108 calculates, from the energy amount per optical member input to the polymerization unit in each step of the optical member production obtained from the first energy amount information, the energy amount per optical member input to maintain the temperature of the space where the polymerization unit is disposed in each step of the optical member production obtained from the second energy amount information, the yield indicated by the yield information, and the number of produced optical members, the environmental load value A. For example, by multiplying the sum of the energy amount per optical member input to the polymerization part in each process of manufacturing the optical member obtained from the first energy amount information and the energy amount per optical member input to maintain the temperature of the space where the polymerization part is arranged in each process of manufacturing the optical member obtained from the second energy amount information by the number obtained by multiplying the number of manufactured optical members by the reciprocal of the yield, the environmental load value A is calculated. Here, the number of manufactured optical members may be the actual production number or the planned production number. In addition, the environmental load value A may be calculated by further considering the amount of cutting waste generated when processing the optical member manufactured in the polymerization part in the manufacture of the optical member. For example, the environmental load value A may be calculated by further adding the product of the energy amount corresponding to the amount of cutting waste per optical member and the number obtained by multiplying the planned production number of optical members by the reciprocal of the yield.

[0014] Further, the calculation unit 108 calculates an environmental load value B generated under the manufacturing conditions of an optical member by a given polymerization, which is different from the manufacturing of the optical member. Specifically, the calculation unit 108 calculates the environmental load value B in the same manner as the environmental load value A from the energy amount per optical member input to the polymerization part in each process of the manufacturing conditions of an optical member by a given polymerization determined in advance, the energy amount per optical member input to maintain the temperature of the space where the polymerization part is arranged in each process of the manufacturing conditions of an optical member by a given polymerization, the yield under the manufacturing conditions of an optical member by a given polymerization, and the number of manufactured optical members. Here, as the manufacturing conditions of an optical member by a given polymerization, the manufacturing conditions of the casting polymerization method in which a polymerizable composition containing a monomer is injected into a mold (die) and heat-cured, which are conventionally known, may be used. In the case of a conventionally known monomer containing a polyisocyanate compound and a polythiol compound having two or more mercapto groups, and these compounds are polymerized to manufacture an optical member with few veins and having optical quality, polymerization is often performed for about 20 hours (see, for example, Japanese Patent Publication No. 2012-196934).

[0015] Further, the calculation unit 108 (1) The variation amount of the environmental load value calculated from the difference between the given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical member, the environmental load value required for manufacturing one polymerization part, and the environmental load value required for storing one polymerization part. (2) The variation amount of the environmental load value calculated from the difference between the number of temperature adjustment devices for a given polymerization part and the number of temperature adjustment devices for the polymerization part used in the manufacture of the optical member, the environmental load value required for manufacturing one temperature adjustment device, and the environmental load value due to the exhaust heat of one temperature adjustment device, and (3) The variation amount of the environmental load value calculated from the environmental load value required for processing a given optical member and the environmental load value required for processing the optical member manufactured by the manufacture of the optical member. Calculate at least one of them. Specifically, the calculation unit 108 calculates the first additional variation amount of the environmental load value from the difference between the given number of polymerization parts input by the user and the number of polymerization parts used in the manufacture of the optical member, the predetermined environmental load value required for manufacturing one polymerization part, and the predetermined environmental load value required for storing one polymerization part. For example, the calculation unit 108 calculates the first additional variation amount of the environmental load value by multiplying the sum of the environmental load value required for manufacturing one polymerization part and the environmental load value required for storing one polymerization part by the difference between the given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical member. In addition, the calculation unit 108 calculates the second additional variation amount of the environmental load value from the difference between the number of temperature adjustment devices for a given polymerization part input by the user and the number of temperature adjustment devices for the polymerization part used in the manufacture of the optical member, the predetermined environmental load value required for manufacturing one temperature adjustment device, and the predetermined environmental load value due to the exhaust heat of one temperature adjustment device. For example, the calculation unit 108 calculates the second additional variation amount of the environmental load value by multiplying the sum of the environmental load value required for manufacturing one temperature adjustment device and the environmental load value due to the exhaust heat of one temperature adjustment device by the difference between the given number of polymerization parts and the number of polymerization parts used in the manufacture of the optical member. Further, the arithmetic unit 108 calculates a third additional variation amount of the environmental load value from the difference between a predetermined environmental load value required for processing a given optical member and an environmental load value required for processing the optical member manufactured by manufacturing the optical member input from the user.

[0016] The arithmetic unit 108 calculates the variation amount of the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional variation amount to the third additional variation amount to the variation amount of the environmental load value, thereby calculating the variation amount of the environmental load value in the manufacture of the optical member as compared with the optical member manufacturing conditions by a given polymerization. Further, the arithmetic unit 108 multiplies the calculated variation amount of the environmental load value by a predetermined value to calculate a variation token. At this time, when the variation amount of the environmental load value in the manufacture of the optical member indicates a reduction in the environmental load value, a positive variation token is calculated. On the other hand, when the variation amount of the environmental load value in the manufacture of the optical member indicates an increase in the environmental load value, a negative variation token is calculated.

[0017] The manufacturing condition determination unit 110 determines the manufacturing conditions in the manufacture of the optical member such that the variation token becomes equal to or greater than a given value based on the calculated variation token. Specifically, when the calculated variation token is less than a given value, the manufacturing condition determination unit 110 changes the manufacturing conditions in the manufacture of the optical member so as to increase the variation token, that is, so as to reduce the environmental load value. For example, the manufacturing conditions are changed by lowering the viscosity of the polymerizable composition for the optical material in the stirring unit described later within an appropriate range and raising the temperature in the stirring unit within an appropriate range. Generally, increasing the viscosity shortens the energy and time required for polymerization, so the environmental load value decreases, but the optical quality of the optical member, which is a polymer, may decrease. Therefore, appropriate conditions are set in consideration of the balance with the yield of the optical quality.

[0018] ≪Method for manufacturing an optical member≫ Next, a manufacturing method for the optical member will be described. The manufacturing method for the optical member is a method for manufacturing an optical material using a polymerizable composition for an optical material containing two or more different monomers for the optical material and a polymerization catalyst, and includes a preparation step of preparing a first raw material composition and a second raw material composition, a shearing step of applying a shearing force to the first raw material composition and the second raw material composition to produce the polymerizable composition for the optical material, a stirring step of applying a stirring force to the polymerizable composition for the optical material, a casting step of casting the polymerizable composition for the optical material into a mold after the stirring step, and a curing step of curing the polymerizable composition for the optical material by polymerizing the two or more different monomers for the optical material in the polymerizable composition for the optical material in the mold. "Applying a shearing force to the first raw material composition and the second raw material composition" means applying a force mainly in a direction intersecting the flow direction to the first raw material composition and the second raw material composition while flowing them. "Applying a stirring force to the polymerizable composition for the optical material" means applying a force substantially parallel to the reverse direction of the flow direction (i.e., the direction from the inlet to the outlet on an imaginary line connecting the part (inlet) where the composition enters the step of applying the stirring force and the part (outlet) where it exits) to the polymerizable composition for the optical material while flowing it, or stopping the flow and stirring the polymerizable composition for the optical material.

[0019] By including each of the above steps, the manufacturing method of the optical member of the present disclosure can suppress U-shaped veins in the obtained optical material. U-shaped veins are likely to occur after a certain period of time has passed since the polymerizable composition for the optical material is cast into the mold. From the viewpoint of suppressing U-shaped veins, the present inventors focused on the steps of shearing and stirring the first raw material composition and the second raw material composition. Furthermore, as a result of continuous examination of the modes, order, etc. of shearing and stirring, it has been found that the manufacturing method of the optical member of the present disclosure can suppress U-shaped veins in the obtained optical material by having the above-described configuration including the shearing step and the stirring step.

[0020] The polymerizable composition for an optical material in the present disclosure contains two or more different monomers for an optical material and a polymerization catalyst. Further, the polymerizable composition for an optical material is produced by applying a shearing force to a first raw material composition and a second raw material composition. Therefore, the first raw material composition and the second raw material composition, as a whole of the combined first raw material composition and second raw material composition, contain two or more different monomers for an optical material and a polymerization catalyst. For example, the first raw material composition and the second raw material composition may each contain different types of monomers for an optical material, and at least one of the first raw material composition and the second raw material composition may contain a polymerization catalyst.

[0021] <Preparation Step> The preparation step is a step of preparing a first raw material composition and a second raw material composition.

[0022] In the preparation step, the first raw material composition and the second raw material composition are not particularly limited as long as they contain, as a whole, two or more different monomers for an optical material and a polymerization catalyst. The first raw material composition and the second raw material composition may each use a ready-made product, or may be prepared by mixing a monomer for an optical material and a polymerization catalyst. The method of the above mixing is not particularly limited, and a known method can be used.

[0023] The temperature at the time of mixing the above components is not particularly limited, but it is preferably 30°C or lower, and more preferably room temperature (25°C) or lower. From the viewpoint of the pot life of the polymerizable composition for an optical material to be prepared, it may be preferable to make the temperature even lower than 25°C. However, when the solubility of additives such as an internal release agent and the above components is not good, the above components may be heated in advance to dissolve the above additives in the above components.

[0024] When mixing the above components, it is preferably carried out under a dry inert gas in order to prevent moisture from mixing into the polymerizable composition for optical materials.

[0025] In the preparation step, after preliminarily mixing a polymerization catalyst with a part of two or more different monomers for optical materials, the remaining parts of the two or more different monomers for optical materials may be mixed at once or may be mixed in multiple portions. As specific embodiments of the preparation step, for example, the following embodiments can be mentioned.

[0026] First, a part of the monomer for optical materials and an additive (for example, an internal mold release agent) are charged and mixed to prepare a mixed solution. After stirring this mixed solution at 25°C for 1 hour to completely dissolve each component, a part of the remaining monomer for optical materials is further charged and stirred to form a uniform solution. This solution is defoamed to obtain a first raw material composition. Then, the remaining part of the monomer for optical materials and the catalyst are stirred at 25°C for 30 minutes to completely dissolve and form a uniform solution. This solution is defoamed to obtain a second raw material composition.

[0027] <Shearing step> The shearing step is a step of applying a shearing force to the first raw material composition and the second raw material composition to produce a polymerizable composition for optical materials. In the present disclosure, the force applied in a direction intersecting the flow direction is also referred to as a shearing force. In the present disclosure, mainly applying a force in a direction intersecting the flow direction is also referred to as "shearing".

[0028] "Flowing" means, for example, flowing the composition by performing operations such as feeding the composition from a tank to a power mixer, feeding the composition from the power mixer to a stirring tank, etc.

[0029] When shearing, the flow rates of the first raw material composition and the second raw material composition are preferably 3 g / s or more, more preferably 6 g / s or more, and even more preferably 9 g / s or more, from the viewpoint of suppressing an increase in the viscosity of the polymerizable composition for optical materials while increasing productivity. When shearing, from the viewpoint of suppressing the U-shaped vein pattern of the polymerizable composition for optical materials, the flow rates of the first raw material composition and the second raw material composition are preferably 45 g / s or less, more preferably 40 g / s or less, and even more preferably 35 g / s or less.

[0030] There is no particular limitation on the method of applying a force to the first raw material composition and the second raw material composition in a direction intersecting the flow direction. Examples of the above method include a method using a power mixer.

[0031] The rotation speed in the shearing step is preferably 200 rpm or more, more preferably 400 rpm or more, and even more preferably 500 rpm or more. The rotation speed in the shearing step is preferably 3000 rpm or less, more preferably 2500 rpm or less, and even more preferably 2000 rpm or less.

[0032] <Polymerizable composition for optical materials> The polymerizable composition for optical materials is produced by applying a shearing force to the first raw material composition and the second raw material composition. The polymerizable composition for optical materials contains two or more different monomers for optical materials and a polymerization catalyst.

[0033] (Monomer for optical materials) Examples of the monomer for optical materials include isocyanate compounds, polythiol compounds having two or more mercapto groups, hydroxy thiol compounds having one or more mercapto groups and one or more hydroxyl groups, polyol compounds having two or more hydroxyl groups, amine compounds, and the like.

[0034] It is preferable that the monomers for two or more different optical materials contain an isocyanate compound (A) and at least one active hydrogen compound (B) selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound having one or more mercapto groups and one or more hydroxyl groups, a polyol compound having two or more hydroxyl groups, and an amine compound.

[0035] 〔Isocyanate compound (A)〕 Examples of the isocyanate compound (A) include aliphatic isocyanate compounds, alicyclic isocyanate compounds, aromatic isocyanate compounds, heterocyclic isocyanate compounds, etc., and one kind or a mixture of two or more kinds can be used. These isocyanate compounds may contain dimers, trimers, and prepolymers. Examples of these isocyanate compounds can include the compounds exemplified in International Publication No. 2011 / 055540. In the present disclosure, the alicyclic isocyanate compound refers to an isocyanate compound that contains an alicyclic structure and may contain a heterocyclic structure. The aromatic isocyanate compound refers to an isocyanate compound that contains an aromatic structure and may contain an alicyclic structure and a heterocyclic structure. The heterocyclic isocyanate compound refers to an isocyanate compound that contains a heterocyclic structure and does not contain an alicyclic structure and an aromatic structure.

[0036] It is preferable that the isocyanate compound (A) contains at least one selected from aliphatic isocyanate compounds, alicyclic isocyanate compounds, aromatic isocyanate compounds, and heterocyclic isocyanate compounds, and it is more preferable that it contains at least one of alicyclic isocyanate compounds and aromatic isocyanate compounds.

[0037] In the present disclosure, from the viewpoint of suppressing the streaks in the optical material and shortening the manufacturing time of the optical member, the isocyanate compound (A) preferably contains at least one selected from 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, m-xylylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, dicyclohexylmethane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, isophorone diisocyanate, 1,6-hexamethylene diisocyanate, and 1,5-pentamethylene diisocyanate. More preferably, it contains at least one selected from 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, m-xylylene diisocyanate, dicyclohexylmethane diisocyanate, and 1,3-bis(isocyanatomethyl)cyclohexane. Even more preferably, it contains at least one selected from m-xylylene diisocyanate, 2,5-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane, and 2,6-bis(isocyanatomethyl)bicyclo-[2.2.1]-heptane.

[0038] [Active hydrogen compound] Examples of the active hydrogen compound include polythiol compounds having two or more mercapto groups, hydroxy thiol compounds having one or more mercapto groups and one or more hydroxyl groups, polyol compounds having two or more hydroxyl groups, and amine compounds. As the active hydrogen compound, oligomers of the above active hydrogen compounds or halogen-substituted products (for example, chlorine-substituted products, bromine-substituted products, etc.) of the above active hydrogen compounds may be used. Also, the active hydrogen compound may be used alone or in combination of two or more.

[0039] (Polythiol compound having two or more mercapto groups) The polythiol compound is a compound having two or more mercapto groups, and examples thereof include the compounds exemplified in International Publication No. 2016 / 125736. In the present disclosure, from the viewpoint of suppressing the vein pattern in the optical material and shortening the manufacturing time of the optical member, the polythiol compound is 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, pentaerythritol tetrakis(3-mercaptopropionate), bis(mercaptoethyl) sulfide, pentaerythritol tetrakis(2-mercaptoacetate), 2,5-bis(mercaptomethyl)-1,4-dithiane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, and 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithietane, and preferably contains at least one selected from the group consisting of: More preferably, it contains at least one selected from the group consisting of 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, pentaerythritol tetrakis(3-mercaptopropionate), pentaerythritol tetrakis(2-mercaptoacetate), and 2,5-bis(mercaptomethyl)-1,4-dithiane. It is more preferable to further contain at least one selected from 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, and pentaerythritol tetrakis(3-mercaptopropionate).

[0040] (A hydroxy thiol compound having one or more mercapto groups and one or more hydroxyl groups) Examples of the thiol compound having a hydroxy group include, but are not limited to, 2-mercaptoethanol, 3-mercapto-1,2-propanediol, glycerin bis(mercaptoacetate), 4-mercaptophenol, 2,3-dimercapto-1-propanol, pentaerythritol tris(3-mercaptopropionate), pentaerythritol tris(thioglycolate), etc.

[0041] (A polyol compound having two or more hydroxyl groups) Examples of the polyol compound include one or more aliphatic or alicyclic alcohols. Specifically, linear or branched aliphatic alcohols, alicyclic alcohols, and alcohols obtained by adding at least one selected from the group consisting of ethylene oxide, propylene oxide, and ε-caprolactone to these alcohols can be mentioned. More specifically, the compounds exemplified in International Publication No. 2016 / 125736 can be mentioned.

[0042] The polyol compound is preferably at least one selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,2-cyclopentanediol, 1,3-cyclopentanediol, 1,2-cyclohexanediol, 1,3-cyclohexanediol, and 1,4-cyclohexanediol.

[0043] (amine compound) Examples of the amine compound include primary polyamine compounds such as ethylenediamine, 1,2- or 1,3-diaminopropane, 1,2-, 1,3- or 1,4-diaminobutane, 1,5-diaminopentane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,10-diaminodecane, 1,2-, 1,3- or 1,4-diaminocyclohexane, o-, m- or p-diaminobenzene, 3,4- or 4,4'-diaminobenzophenone, 3,4- or 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane, 4,4'-diaminodiphenyl sulfide, 3,3' or 4,4'-diaminodiphenyl sulfone, 2,7-diaminofluorene, 1,5-, 1,8- or 2,3-diaminonaphthalene, 2,3-, 2,6- or 3,4-diaminopyridine, 2,4- or 2,6-diaminotoluene, m- or p-xylylenediamine, isophoronediamine, diaminomethylbicycloheptane, 1,3- or 1,4-diaminomethylcyclohexane, 2- or 4-aminopiperidine, 2- or 4-aminomethylpiperidine, 2- or 4-aminoethylpiperidine, N-aminoethylmorpholine, N-aminopropylmorpholine; monofunctional secondary amine compounds such as diethylamine, dipropylamine, di-n-butylamine, di-sec-butylamine, diisobutylamine, di-n-pentylamine, di-3-pentylamine, dihexylamine, dioctylamine, di(2-ethylhexyl)amine, methylhexylamine, diallylamine, N-methylallylamine, piperidine, pyrrolidine, diphenylamine, N-methylamine, N-ethylamine, dibenzylamine, N-methylbenzylamine, N-ethylbenzylamine, dicyclohexylamine, N-methylaniline, N-ethylaniline, dinaphthylamine, 1-methylpiperazine, morpholine; Secondary polyamine compounds such as N,N'-dimethylethylenediamine, N,N'-dimethyl-1,2-diaminopropane, N,N'-dimethyl-1,3-diaminopropane, N,N'-dimethyl-1,2-diaminobutane, N,N'-dimethyl-1,3-diaminobutane, N,N'-dimethyl-1,4-diaminobutane, N,N'-dimethyl-1,5-diaminopentane, N,N'-dimethyl-1,6-diaminohexane, N,N'-dimethyl-1,7-diaminoheptane, N,N'-diethylethylenediamine, N,N'-diethyl-1,2-diaminopropane, N,N'-diethyl-1,3-diaminopropane, N,N'-diethyl-1,2-diaminobutane, N,N'-diethyl-1,3-diaminobutane, N,N'-diethyl-1,4-diaminobutane, N,N'-diethyl-1,5-diaminopentane, N,N'-diethyl-1,6-diaminohexane, N,N'-diethyl-1,7-diaminoheptane, piperazine, 2-methylpiperazine, 2,5-dimethylpiperazine, 2,6-dimethylpiperazine, homopiperazine, 1,1-di-(4-piperidyl)methane, 1,2-di-(4-piperidyl)ethane, 1,3-di-(4-piperidyl)propane, 1,4-di-(4-piperidyl)butane, tetramethylguanidine; etc. are mentioned.

[0044] Among the above, the active hydrogen compound (B) preferably contains a polythiol compound having two or more mercapto groups. The content of the polythiol compound having two or more mercapto groups is preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more based on the total mass of the active hydrogen compound (B).

[0045] Also, as the active hydrogen compound (B) in the present disclosure, the total content of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane and pentaerythritol tetrakis(3-mercaptopropionate) is preferably 60% by mass or more, more preferably 70% by mass or more, and even more preferably 80% by mass or more based on the total mass of the active hydrogen compound (B).

[0046] In the composition, the molar ratio of the sum of the hydroxyl group (OH group) and the mercapto group (SH group) in the active hydrogen compound to the isocyanate group (NCO group) in the isocyanate compound (A), i.e., NCO group / (OH group + SH group), is preferably from 0.8 to 1.2, more preferably from 0.85 to 1.15, and even more preferably from 0.9 to 1.1.

[0047] The absolute value V (also referred to as the viscosity difference V) of the difference between the viscosity Va measured with a B-type viscometer of the first raw material composition under the conditions of 25 °C and 60 rpm (revolutions per minute) and the viscosity Vb measured with a B-type viscometer of the second raw material composition under the conditions of 25 °C and 60 rpm is preferably 1500 mPa·s or less, more preferably 1000 mPa·s or less, even more preferably 500 mPa·s or less, and particularly preferably 300 mPa·s or less from the viewpoint of suppressing the U-shaped vein pattern in the obtained optical material. Although the viscosity may be increased to shorten the polymerization time, in the present disclosure, for example, even if V is 10 mPa·s or more, the optical quality of the optical material can be maintained well. From the above viewpoints, the viscosity difference V may be 20 mPa·s or more, or may be 100 mPa·s or more. Va is the viscosity of the first raw material composition before applying a shear force, and Vb is the viscosity of the second raw material composition before applying a shear force.

[0048] The viscosity Va measured with a B-type viscometer of the above-mentioned first raw material composition under the conditions of 25 °C and 60 rpm is preferably in the range of 10 mPa·s to 2000 mPa·s, more preferably in the range of 50 mPa·s to 1500 mPa·s, and even more preferably in the range of 100 mPa·s to 1000 mPa·s.

[0049] In the method for manufacturing the optical member of the present disclosure, it is preferable that the first raw material composition contains at least one compound selected from the group consisting of a polyisocyanate compound, an epoxy compound, and an episulfide compound.

[0050] Moreover, it is preferable that the second raw material composition contains at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound.

[0051] <Polymerization catalyst> The polymerization catalyst is not particularly limited, and for example, a basic catalyst, an organometallic catalyst, zinc carbamate, an ammonium salt, a sulfonic acid, etc. can be used. Only one kind of the above polymerization catalyst may be used, or two or more kinds may be used in appropriate combination.

[0052] (Basic catalyst) Examples of the basic catalyst include amine-based catalysts and imidazole-based catalysts. Specifically, tertiary amine-based catalysts such as triethylenediamine, N,N-dimethylethanolamine, triethylamine, N-ethylmorpholine, 2-methylpyrazine, pyridine, α-picoline, β-picoline, γ-picoline, 2,6-lutidine, 3,5-lutidine, 2,4,6-collidine, 3-chloropyridine, N,N-diethylaniline, N,N-dimethylaniline, hexamethylenetetramine, quinoline, isoquinoline, N,N-dimethyl-p-toluidine, N,N-dimethylpiperazine, cinchonidine, 4-methylmorpholine, triallylamine, trioctylamine, 1,2-dimethylimidazole, 1-benzyl-2-methylimidazole, etc. can be mentioned.

[0053] Among the above, as the basic catalyst, an amine-based catalyst is preferable. Examples of the amine-based catalyst include tertiary amine-based catalysts such as 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, and N-ethylmorpholine.

[0054] The amine-based catalyst preferably contains at least one selected from 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, and N-ethylmorpholine.

[0055] The basic catalyst preferably contains a compound represented by the following general formula (2) and / or a compound represented by the following general formula (3).

[0056]

Chemical formula

[0057] In general formula (2), R1 represents a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, or a halogen atom, and a plurality of R1 may be the same or different. Q represents a carbon atom or a nitrogen atom. m represents an integer of 0 to 5.

[0058]

Chemical formula

[0059] In general formula (3), R2, R3, and R4 each independently represent a linear alkyl group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, or an allyl group.

[0060] The basic catalyst preferably has a pKa value of 1 to 9, more preferably 3 to 8, and even more preferably 4 to 8.

[0061] The pKa value (acid dissociation index) can be measured, for example, by the method described in (a) The Journal of Physical Chemistry vol.68, number 6, page 1560 (1964), (b) the method using a potentiometric automatic titrator (such as AT-610 (trade name)) manufactured by Kyoto Electronics Industry Co., Ltd., etc., and also (c) the acid dissociation index, etc. described in the Chemical Handbook edited by the Chemical Society of Japan (revised 3rd edition, June 25, 1984, published by Maruzen Co., Ltd.) can be utilized.

[0062] (Organometallic catalyst) Examples of the organometallic catalyst include organotin catalysts; organic acid salts of iron, nickel, zinc, etc.; acetylacetonate complexes; catalyst compositions composed of carboxylic acid metal compounds and quaternary ammonium salt compounds; catalyst compositions composed of bicyclic tertiary amine compounds and quaternary ammonium salt compounds; metal catalysts in which alkoxy groups, carboxy groups, etc. are coordinated to titanium or aluminum; etc. Among the above, organotin catalysts are preferred as the organometallic catalyst. Examples of the organotin catalyst include dibutyltin dichloride (DBC), dimethyltin dichloride (DMC), dibutyltin dilaurate (DBTDL), dibutyltin diacetate, etc.

[0063] The organotin catalyst preferably contains at least one selected from dibutyltin dichloride, dimethyltin dichloride, dibutyltin dilaurate, and dibutyltin diacetate.

[0064] The polymerization catalyst preferably contains at least one selected from the group consisting of basic catalysts having a pKa value of 4 to 8 and organometallic catalysts.

[0065] The polymerization catalyst preferably contains at least one selected from amine catalysts and organotin catalysts.

[0066] As the polymerization catalyst, it is also preferable to contain at least one selected from the group consisting of 3,5-lutidine, 2,4,6-collidine, triethylenediamine, N,N-dimethylethanolamine, triethylamine, N-ethylmorpholine, dibutyltin dichloride, dimethyltin dichloride, dibutyltin dilaurate, and dibutyltin diacetate.

[0067] In the preparation step, a total of 100 parts by mass of two or more different monomers for optical materials and 0.010 to 2.0 parts by mass of a polymerization catalyst are prepared. That is, in the manufacturing method of the optical member of the present disclosure, 0.010 to 2.0 parts by mass of a polymerization catalyst is used with respect to a total of 100 parts by mass of two or more different monomers for optical materials. As described above, the amount of the polymerization catalyst used in the present disclosure is large compared to the conventional manufacturing method of optical members. Thereby, when polymerizing the monomer for optical materials in the polymerizable composition for optical materials in the curing step, the heat of reaction of the polymerizable composition for optical materials can be generated in a short time. By further utilizing this heat of reaction for polymerization, the polymerization reaction can be promoted well, and a high-quality optical material with suppressed vein patterns can be obtained in a shorter time than before.

[0068] By using 0.010 parts by mass or more of a polymerization catalyst with respect to 100 parts by mass of two or more different monomers for optical materials, the polymerization reaction can be promoted well, so that a high-quality optical material with suppressed vein patterns can be obtained in a short time. Further, by promoting the polymerization reaction well, the mold release property when removing the cured product from the mold can be improved. From the above viewpoints, it is preferable to use 0.015 parts by mass or more, more preferably 0.038 parts by mass or more, still more preferably 0.10 parts by mass or more, and particularly preferably 0.17 parts by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for optical materials.

[0069] The range of the content of the polymerization catalyst described above may be appropriately changed depending on the types of the monomers for optical materials and the polymerization catalyst. For example, when the monomers for optical materials include 2,5(6)-bis(isocyanatomethyl)-bicyclo-[2.2.1]-heptane, pentaerythritol tetrakis(3-mercaptopropionate), and 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, and the polymerization catalyst includes 3,5-lutidine, it is preferable to use 0.10 parts by mass or more, and more preferably 0.17 parts by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for optical materials.

[0070] For example, when the monomers for optical materials include m-xylylene diisocyanate, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and the polymerization catalyst includes 3,5-lutidine, it is preferable to use 0.015 parts by mass or more, and more preferably 0.020 parts by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for optical materials.

[0071] For example, when the monomers for optical materials include m-xylylene diisocyanate and 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, and the polymerization catalyst includes 3,5-lutidine, it is preferable to use 0.010 parts by mass or more, and more preferably 0.015 parts by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for optical materials.

[0072] For example, when the monomer for an optical material contains a mixture of dicyclohexylmethane diisocyanate and 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and the polymerization catalyst contains 3,5-lutidine, it is preferable to use 1.0 part by mass or more, and more preferably 1.5 part by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for the optical material.

[0073] For example, when the monomer for an optical material contains 1,3-bis(isocyanatomethyl)cyclohexane, pentaerythritol tetrakis(2-mercaptoacetate), and 2,5-bis(mercaptomethyl)-1,4-dithiane, and the polymerization catalyst contains 3,5-lutidine, it is preferable to use 0.03 part by mass or more, and more preferably 0.07 part by mass or more of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for the optical material.

[0074] By using 2.0 parts by mass or less of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for the optical material, for example, the handleability when injecting the polymerizable composition for the optical material into a mold can be improved. From the above viewpoints, it is preferable to use 1.5 parts by mass or less of the polymerization catalyst with respect to 100 parts by mass of two or more different monomers for the optical material. Also, depending on the types of the monomer for the optical material and the polymerization catalyst, the polymerization catalyst may be used in an amount of 1.0 part by mass or less, 0.3 part by mass or less, or 0.15 part by mass or less with respect to 100 parts by mass of two or more different monomers for the optical material.

[0075] Note that the amount of the above polymerization catalyst can be appropriately set according to the type of the polymerization catalyst, the types and amounts of the monomers used (isocyanate compounds, active hydrogen compounds, other components, etc.), and the shape of the desired molded body.

[0076] The polymerization catalyst preferably satisfies the following Condition 1. [Condition 1] -Ea / R is -7100 or more and -2900 or less. (Ea is the activation energy calculated by the Arrhenius plot from the reaction rate constants of the two or more different monomers for the optical material at two or more different temperatures, and R is the gas constant (8.314 J / mol / K).)

[0077] By the polymerization catalyst satisfying Condition 1, in the process of the polymerizable composition polymerizing and curing, the variation in the polymerization rate can be suppressed. As a result, the generation of optical distortion and streaks is suppressed, and an optical material with excellent appearance can be obtained.

[0078] The value of Ea is calculated by the following method. A physical property acquisition step of heating a composition 1 containing a polymerizable reactive compound and a predetermined amount of a polymerization catalyst, and acquiring a physical property value 1a derived from a functional group before heating of the polymerizable reactive compound and a physical property value 1b derived from a remaining functional group after holding at a plurality of temperatures; A remaining functional group rate calculation step of calculating a remaining functional group rate 1 at a plurality of the above temperatures from the physical property value 1a and the physical property value 1b; A reaction rate constant calculation step of calculating a reaction rate constant 1 at a plurality of the above temperatures from the remaining functional group rate 1 based on the reaction rate equation; A fitting step of calculating an activation energy Ea1 and a frequency factor A1 by the Arrhenius plot from the reaction rate constants 1 at a plurality of the above temperatures; By performing the above, the value of Ea is calculated. Using the calculated Ea, it is determined whether the polymerization catalyst satisfies Condition 1. The specific embodiments of the method for calculating the value of Ea and the method for determining whether the polymerization catalyst satisfies Condition 1 are the same as the specific embodiments described in International Publication No. 2020 / 256057.

[0079] <Stirring step> The stirring step is a step of applying a stirring force to the polymerizable composition for the optical material. In the present disclosure, the force applied in a direction substantially parallel and opposite to the flow direction is also referred to as the stirring force.

[0080] When applying a force in a direction substantially parallel and opposite to the flow direction, the preferable range of the flow rate of the polymerizable composition for an optical material is the same as the preferable range of the flow rate of the polymerizable composition for an optical material in the above-mentioned <shearing step>.

[0081] There is no particular limitation on the method of applying a force in a direction substantially parallel and opposite to the flow direction to the polymerizable composition for an optical material. Examples of the above method include a method using a stirring tank containing a stirrer.

[0082] The rotation speed in the stirring step is preferably 50 rpm or more, more preferably 100 rpm or more, and even more preferably 200 rpm or more. The rotation speed in the stirring step is preferably 1000 rpm or less, more preferably 800 rpm or less, and even more preferably 600 rpm or less.

[0083] By including the shearing step and the stirring step, the manufacturing method of the optical member of the present disclosure can continuously produce a uniform polymerizable composition for an optical material from the viewpoint of suppressing the U-shaped veins in the obtained optical material.

[0084] From the viewpoint of suppressing the U-shaped veins in the obtained optical material, the manufacturing method of the optical member of the present disclosure preferably includes the shearing step and the stirring step in this order. That is, the method for manufacturing an optical member of the present disclosure is a method for manufacturing an optical material using a polymerizable composition for an optical material containing two or more different monomers for optical materials and a polymerization catalyst, the method including, in this order, a preparation step of preparing a first raw material composition and a second raw material composition, a shearing step of applying a shearing force to the first raw material composition and the second raw material composition to manufacture the polymerizable composition for an optical material, a stirring step of applying a stirring force to the polymerizable composition for an optical material, a casting step of casting the polymerizable composition for an optical material into a mold after the stirring step, and a curing step of curing the polymerizable composition for an optical material by polymerizing the two or more different monomers for optical materials in the polymerizable composition for an optical material in the mold, which is preferably included.

[0085] <Filtration step> The method for manufacturing an optical member of the present disclosure may further include a filtration step of filtering the polymerizable composition for an optical material. The filtration step can be performed using a filter. As the filter, for example, a capsule filter can be used. The filtration accuracy of the filter is preferably 1.0 μm to 4.5 μm.

[0086] <Second stirring step> The method for manufacturing an optical member of the present disclosure may further include a second stirring step of stirring the polymerizable composition for an optical material in addition to the above steps. The second stirring step is a step for further stirring the polymerizable composition for an optical material in addition to the above-described shearing step and stirring step. When the second stirring step is performed, the stirring step described in the above <Stirring step> is also referred to as the first stirring step. In the second stirring step, examples of the method for stirring the polymerizable composition for an optical material include a method using a static mixer or the like.

[0087] When using a static mixer, the inner diameter φ of the static mixer is preferably 5 to 8, and more preferably 6 to 8. When using a static mixer, the number of elements of the static mixer is preferably 16 to 48, more preferably 24 to 48.

[0088] <Casting process> The casting process is a process of casting the polymerizable composition for an optical material into a mold after the first or second stirring process. The viscosity of the polymerizable composition for an optical material measured with a B-type viscometer at 25 °C and 60 rpm in the casting process is preferably 10 mPa·s to 1000 mPa·s. The casting process is preferably a process of adjusting the viscosity of the polymerizable composition for an optical material measured with a B-type viscometer at 25 °C and 60 rpm to 10 mPa·s to 1000 mPa·s and casting it into a mold. By adjusting the viscosity of the polymerizable composition for an optical material within the above range and casting it, the viscosity of the polymerizable composition for an optical material can be within an appropriate range, and streaks in the obtained optical material can be suppressed.

[0089] From the above viewpoints, the viscosity of the polymerizable composition for an optical material in the casting process is preferably 10 mPa·s or more, more preferably 40 mPa·s or more, further preferably 70 mPa·s or more, particularly preferably 80 mPa·s or more, even more preferably 100 mPa·s or more, and even further preferably 120 mPa·s or more. The viscosity of the polymerizable composition for an optical material in the casting process is preferably 1000 mPa·s or less, more preferably 700 mPa·s or less, and further preferably 400 mPa·s or less from the viewpoint of maintaining good handleability when shaping the optical material into a desired shape.

[0090] There is no particular limitation on the method for adjusting the viscosity of the polymerizable composition for an optical material. For example, the viscosity of the polymerizable composition for an optical material may be adjusted by methods such as adding a high-viscosity compound, heating, and stirring.

[0091] The casting step may be a step of casting the polymerizable composition for an optical material into a mold by a multi-axis method. Further, it may be a step of casting the polymerizable composition for an optical material into a mold by an in-line mixing method immediately before casting.

[0092] In the casting step, the casting method may be manual casting or automatic casting by a machine. The method of automatic casting may be pressure feeding with nitrogen, or liquid feeding by a pump (such as a diaphragm pump or a gear pump).

[0093] In the casting step, it is preferable to apply pressure (for example, back pressure) to the polymerizable composition for an optical material using nitrogen or the like and cast the polymerizable composition for an optical material into a mold. Thereby, more preferably, the polymerizable composition for an optical material can be cast into a mold by a multi-axis method.

[0094] <Curing step> The curing step is a step of curing the polymerizable composition for an optical material by polymerizing the two or more different monomers for an optical material in the polymerizable composition for an optical material in the mold. By including the curing step in the manufacturing method of the optical member of the present disclosure, the polymerizable composition for an optical material can be polymerized, and an optical material can be manufactured.

[0095] The method of polymerization is not particularly limited, and a method of generating a polymerization reaction by heating by a known method may be used. For example, a method of injecting a polymerizable composition into a molding mold (casting mold) held by a gasket or tape or the like and gradually raising the temperature while heating to promote the polymerization reaction may be used. At this time, depending on the physical properties required for the obtained optical material, it is preferable to perform a defoaming treatment under reduced pressure and a filtration treatment under pressure, reduced pressure, or the like as necessary.

[0096] As the method of polymerization, a method of performing a polymerization reaction without heating may be used. That is, in the curing step in the present disclosure, the polymerizable composition for an optical material may be cured by polymerization by allowing the polymerizable composition for an optical material to stand still.

[0097] The environment in which the curing step is performed is not particularly limited, and the mold can be heated and cured from the outside of the mold. However, from the viewpoint of enhancing optical quality such as grain and polymerizing in a short time, it is preferable that the polymerizable composition for an optical material is cured by allowing the polymerizable composition for an optical material to stand still in a closed space. By allowing the polymerizable composition for an optical material to stand still in a closed space, heat generated by self-heating of the polymerizable composition for an optical material can be prevented from being released to the outside. As a result, since heat generated by self-heating can be retained in the closed space, the polymerization reaction can be promoted more efficiently, and an optical material can be manufactured in a shorter time. Examples of the closed space include a heat-insulated environment. The heat-insulated environment refers to an environment in which heat is retained inside and heat conduction between the inside and the outside is suppressed. The environment in which heat conduction between the inside and the outside is suppressed means an environment in which the heat conductivity between the inside and the outside of the closed space is at a level that can cure the polymerizable composition for an optical material when the polymerizable composition for an optical material is allowed to stand still in the closed space.

[0098] The heat-insulated environment can be formed using, for example, a heat-insulating material. That is, by allowing the polymerizable composition for an optical material to stand still in a heat-insulating container made of a heat-insulating material, heat can be retained inside the heat-insulating container, and heat conduction between the inside and the outside can be suppressed.

[0099] The thermal conductivity of the heat-insulating material is preferably 0.50 W / mK or less, more preferably 0.10 W / mK or less, and even more preferably 0.05 W / mK or less.

[0100] The density of the heat-insulating material is preferably 10 kg / m 3 or more, and preferably 15 kg / m 3More preferably, it is as above, 20 kg / m 3 Even more preferably, it is as above.

[0101] In the "heat insulation" or "heat-insulated environment" in the present disclosure, within a range that does not prevent the polymerization reaction due to the heat of reaction of the polymerizable composition for optical materials or overly accelerate the polymerization reaction of the polymerizable composition for optical materials by external heating, it is preferable to perform heating to make the heat-insulated reaction tank in a constant temperature state (constant temperature reaction tank). Thereby, according to the temperature rise state due to the self-heating of the monomer for optical materials, etc., the environmental temperature in the reaction tank (constant temperature reaction tank) where the mold is stationary can be kept in a heat-insulated state or a constant temperature state, so that the polymerization reaction can be promoted better.

[0102] As the heat-insulated environment, for example, the above-described heat-insulated reaction tank or constant temperature reaction tank can be used. For example, when the mold filled with the monomer is left stationary in a vacuum container which is a heat-insulated reaction tank, the heat-insulated polymerization in the heat-insulated environment using the heat-insulated reaction tank (constant temperature reaction tank) can be carried out according to the following procedure. Cover the inner surface of the vacuum container with a member having heat-insulating and heat-preserving properties such as urethane foam and cork, and wrap the mold filled with the monomer with a member such as a cloth as needed. Then, leave the mold filled with the monomer stationary in the above vacuum container.

[0103] The curing step may be a step of curing the polymerizable composition for optical materials by leaving the polymerizable composition for optical materials stationary without heating from the outside. As described above, in the present disclosure, heating of the polymerizable composition for optical materials is not necessarily required. When heating from the outside, in some cases, a device is used, and the economic burden may increase. If it is a method without heating from the outside, an optical material can be manufactured by a simple method, so the economic burden can be reduced.

[0104] The curing step is preferably a step of curing the polymerizable composition for optical materials by allowing the polymerizable composition for optical materials to stand for 2 to 10 hours. In the curing step, it is more preferable to allow the polymerizable composition for optical materials to stand for 8 hours or less. Also, from the viewpoint of performing a polymerization reaction to obtain an optical material that cures well, it is preferable to allow the polymerizable composition for optical materials to stand for 2 hours or more, and more preferably 3 hours or more.

[0105] In the curing step, if necessary, a microwave irradiation step of irradiating the polymerizable composition for optical materials with microwaves for a predetermined time may be provided.

[0106] One aspect of the curing step includes an aspect including the following step a and step b. Step a: Inject (cast) the polymerizable composition for optical materials into a mold (inside the cavity of the mold). Step b: Leave the mold injected with the polymerizable composition for optical materials in a closed space for a predetermined time to perform adiabatic polymerization.

[0107] (Step a) First, inject the polymerizable composition into a molding mold (mold) held by a gasket or tape, etc. At this time, depending on the physical properties required for the obtained optical material, it is preferable to perform a defoaming treatment under reduced pressure and / or a filtration treatment under pressure or reduced pressure as necessary.

[0108] (Step b) Regarding the polymerization conditions, although not limited, it is preferably adjusted appropriately according to the composition of the polymerizable composition for optical materials, the type and amount of the catalyst used, the shape of the mold, etc. The mold injected with the polymerizable composition for optical materials may be left in an adiabatic environment for 2 to 4 hours to polymerize.

[0109] In step b, if necessary, after the adiabatic polymerization process of leaving the mold injected with the polymerizable composition for optical materials in an adiabatic environment for a certain time, a heating step may be added. In step b, optionally, in parallel with the step of leaving the mold filled with the polymerizable composition for optical materials in a heat-insulated environment (heat-insulating polymerization), the mold filled with the polymerizable composition for optical materials may be continuously or intermittently heated at a temperature not exceeding the self-heating generated by the polymerizable composition for optical materials in the heat-insulating polymerization process, or the inside of the heat-insulating reaction tank may be heated to keep the environmental temperature inside the heat-insulating reaction tank constant.

[0110] <Annealing step> The method for manufacturing an optical member of the present disclosure may optionally include an annealing step of annealing the cured polymerizable composition for optical materials. The temperature for performing the annealing treatment is usually 50 to 150°C, preferably 90 to 140°C, and more preferably 100 to 130°C.

[0111] <Applications of optical materials> The optical material produced by the method for manufacturing an optical member of the present disclosure can be used for plastic lenses, prisms, optical fibers, information recording substrates, filters, light-emitting diodes, etc. Among the above, the optical material can be preferably used for plastic lenses, and more preferably for plastic lenses for glasses.

[0112] ≪Optical member manufacturing system≫ The optical member manufacturing system of the present disclosure is a system for manufacturing an optical member that polymerizes a polymerizable composition for optical materials containing two or more different monomers for optical materials and a polymerization catalyst, an environmental load value fluctuation token arithmetic unit 100, a shearing unit that applies a shearing force to the first raw material composition and the second raw material composition to produce the polymerizable composition for optical materials, a stirring unit that applies a stirring force to the polymerizable composition for optical materials, a casting unit that casts the polymerizable composition for optical materials into a mold, A curing part that cures the polymerizable composition for an optical material by polymerizing the two or more different monomers for an optical material in the polymerizable composition for an optical material in the mold; and a metering liquid-feeding part.

[0113] <Shearing part> In the shearing part, a shearing force is applied to the first raw material composition and the second raw material composition to produce the polymerizable composition for an optical material. As a method of applying a force in a direction intersecting the flow direction in the shearing part, for example, a method using a power mixer can be mentioned. The preferable ranges of the flow rate of the polymerizable composition for an optical material in the shearing part, the rotation speed of the power mixer, etc. are the same as the preferable ranges of the flow rate of the polymerizable composition for an optical material in the <shearing step>, the rotation speed of the power mixer, etc.

[0114] <Stirring part> In the stirring part, a stirring force is applied to the polymerizable composition for an optical material. As a method of applying a force in a direction substantially parallel and opposite to the flow direction in the stirring part, for example, a method using a stirring tank containing a stir bar can be mentioned. The preferable ranges of the flow rate of the polymerizable composition for an optical material in the stirring part, the rotation speed of the stirring tank, etc. are the same as the preferable ranges of the flow rate of the polymerizable composition for an optical material in the <stirring step>, the rotation speed of the stirring tank, etc.

[0115] <Casting part> In the casting part, the polymerizable composition for an optical material is cast into a mold. Details such as the specific mode of casting and the preferable range of the viscosity of the polymerizable composition for an optical material in the casting part are the same as the details such as the specific mode of casting and the preferable range of the viscosity of the polymerizable composition for an optical material in the <casting step> described above.

[0116] <Curing part> In the curing part, the polymerizable composition for an optical material is cured by polymerizing two or more different monomers for an optical material in the polymerizable composition for an optical material in the mold. Details such as specific embodiments and preferred embodiments in the curing section are the same as those in the specific embodiments, preferred embodiments, etc. in the above-mentioned <Curing Step>.

[0117] <Quantitative Liquid Feeding Section> In the quantitative liquid feeding section, the first raw material composition and the second raw material composition are fed to the shearing section. Specific examples of the quantitative liquid feeding section include pumps such as gear pumps and diaphragm pumps. In the quantitative liquid feeding section, the speed at which the first raw material composition and the second raw material composition are fed to the shearing section may be adjusted as appropriate.

[0118] <Manufacturing Condition Control Device> Preferably, the optical member manufacturing system of the present disclosure further includes a manufacturing condition control device that controls the manufacturing conditions in the manufacture of the optical member so as to be the manufacturing conditions determined by the environmental load value fluctuation token arithmetic unit 100. For example, the manufacturing condition control device controls so as to be the viscosity of the polymerizable composition for the optical material in the stirring section, which is included in the manufacturing conditions determined by the environmental load value fluctuation token arithmetic unit 100.

[0119] By controlling the viscosity of the polymerizable composition for the optical material in the stirring section, the U-shaped vein pattern can be suppressed better. Also, the U-shaped vein pattern can be suppressed better over a long period of time. As a result, since the yield information changes, the environmental load value in the manufacture of the optical member can be reduced.

[0120] Also, the manufacturing condition control device controls so as to be the temperature in the stirring section, which is included in the manufacturing conditions determined by the environmental load value fluctuation token arithmetic unit 100.

[0121] By controlling the temperature in the stirring section, the U-shaped vein pattern can be suppressed better. Also, the U-shaped vein pattern can be suppressed better over a long period of time. As a result, since the yield information changes, the environmental load value in the manufacture of the optical member can be reduced.

[0122] In the manufacturing condition control device, control other than viscosity and temperature may be performed. For example, the liquid level of the polymerizable composition for the optical material in the stirring unit may be controlled. That is, when the liquid level of the polymerizable composition for the optical material drops, the liquid level is raised by feeding the polymerizable composition for the optical material by a metering liquid feeding unit (for example, a pump).

[0123] <Operation of the optical member manufacturing system> Hereinafter, an example of a processing routine by the environmental load value fluctuation token arithmetic unit 100 will be described with reference to FIG. 2. First, in step S100, the first acquisition unit 102 acquires first energy amount information indicating the amount of energy input to the polymerization unit in the above-described optical member manufacturing in which a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst is polymerized. In step S102, the second acquisition unit 104 acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space in which the polymerization unit is disposed in the optical member manufacturing. In step S104, the third acquisition unit 106 acquires yield information of the optical member manufactured by the optical member manufacturing. In step S106, the arithmetic unit 108 calculates the environmental load value A in the optical member manufacturing from the first energy amount information, the second energy amount information, and the yield information. In step S108, the arithmetic unit 108 calculates an environmental load value B generated under the optical member manufacturing conditions by a given polymerization, which is different from the optical member manufacturing.

[0124] In step S110, the arithmetic unit 108 calculates a first additional variation amount of the environmental load value from the difference between the given number of polymerization parts input by the user and the number of polymerization parts used in the optical member manufacturing, the environmental load value required for manufacturing one polymerization part determined in advance, and the environmental load value required for storing one polymerization part determined in advance. For example, the calculation unit 108 calculates the first additional variation amount of the environmental load value by multiplying the sum of the environmental load value required for manufacturing one polymerization unit and the environmental load value required for storing one polymerization unit by the difference between the given number of polymerization units and the number of polymerization units used in the manufacturing of the optical member. Further, the calculation unit 108 calculates the second additional variation amount of the environmental load value from the difference between the number of temperature adjustment devices for a given polymerization unit input by the user and the number of temperature adjustment devices for the polymerization unit used in the manufacturing of the optical member, the environmental load value required for manufacturing one temperature adjustment device determined in advance, and the environmental load value due to the exhaust heat of one temperature adjustment device determined in advance. For example, the calculation unit 108 calculates the second additional variation amount of the environmental load value by multiplying the sum of the environmental load value required for manufacturing one temperature adjustment device and the environmental load value due to the exhaust heat of one temperature adjustment device by the difference between the given number of polymerization units and the number of polymerization units used in the manufacturing of the optical member. Further, the calculation unit 108 calculates the third additional variation amount of the environmental load value from the difference between the environmental load value required for processing a given optical member determined in advance and the environmental load value required for processing the optical member manufactured by the manufacturing of the optical member input by the user. The calculation unit 108 calculates the variation amount of the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional variation amount to the third additional variation amount to this variation amount of the environmental load value, thereby calculating the variation amount of the environmental load value in the manufacturing of the optical member compared with the manufacturing conditions of the optical member by the given polymerization.

[0125] In step S112, the calculation unit 108 multiplies the calculated variation amount of the environmental load value by a predetermined value to calculate a variation token. In step S114, the manufacturing condition determination unit 110 determines whether or not the calculated variation token is equal to or greater than a given value. If the variation token is equal to or greater than the given value, the processing routine ends. On the other hand, if the variation token is less than the given value, the process proceeds to step S116. In step S116, the manufacturing condition determination unit 110 changes the manufacturing conditions in the production of the optical member so as to increase the variation token, that is, so as to reduce the environmental load value.

[0126] Then, the manufacturing condition control device controls the manufacturing conditions in the production of the optical member so as to be the manufacturing conditions determined by the environmental load value variation token calculation device 100. For example, the manufacturing condition control device controls so as to be the viscosity of the polymerizable composition for the optical material in the stirring unit included in the determined manufacturing conditions, and also controls so as to be the temperature in the stirring unit included in the determined manufacturing conditions.

[0127] Further, the optical member manufacturing system of the present disclosure first starts from a state of preparing a first raw material composition and a second raw material composition, and feeds the prepared first raw material composition and second raw material composition to a shearing unit. Note that the first raw material composition and the second raw material composition contain two or more different monomers for optical materials and a polymerization catalyst as a whole. While flowing the fed first raw material composition and second raw material composition, a force is applied to the first raw material composition and the second raw material composition in a direction intersecting the flow direction. In the stirring unit, while flowing the polymerizable composition for the optical material, a force is applied to the polymerizable composition for the optical material in a direction substantially parallel and opposite to the flow direction to stir it, or the flow is temporarily stopped to stir the polymerizable composition for the optical material. Then, in the casting unit, the polymerizable composition for the optical material is cast into a mold. When the casting is completed, the polymerizable composition for the optical material is fed to the curing unit. In the curing unit, the polymerizable composition for the optical material is cured by polymerizing two or more different monomers for optical materials in the polymerizable composition for the optical material in the mold.

[0128] FIG. 3 is a schematic diagram for explaining an example of the optical member manufacturing system. In FIG. 3, a first raw material composition and a second raw material composition for producing a polymerizable composition for an optical material are prepared. By stirring the first raw material composition and the second raw material composition, a polymerizable composition for an optical material containing two or more different monomers for an optical material and a polymerization catalyst is obtained. Therefore, the first raw material composition and the second raw material composition only need to become a polymerizable composition for an optical material when stirred, and as a whole of the first raw material composition and the second raw material composition, it only needs to contain two or more different monomers for an optical material and a polymerization catalyst. Further, the first raw material composition and the second raw material composition may contain a prepolymer obtained by partially polymerizing two or more different monomers for an optical material.

[0129] The prepared first raw material composition is put into the A liquid tank 1, and the second raw material composition is put into the B liquid tank 2 respectively. Then, while adjusting the liquid temperature by the chiller 3, using nitrogen back pressure or the like, the first raw material composition is fed from the A liquid tank 1 to the A liquid metering unit 4 (for example, a gear pump), and the second raw material composition is fed from the B liquid tank 2 to the B liquid metering unit 6 (for example, a gear pump). At this time, the feeding speeds of the A liquid metering unit 4 and the B liquid metering unit 6 may be the same or different. Thereafter, the first raw material composition is fed from the A liquid metering unit 4 via the A liquid flow sensor head 5, and the second raw material composition is fed from the B liquid metering unit 6 via the B liquid flow sensor head 7 to the upper power mixer 8 which is a shearing part. At this stage, the first raw material composition and the second raw material composition are sheared by applying a force in a direction intersecting the flow direction by the upper power mixer 8 to obtain a polymerizable composition for an optical material.

[0130] The polymerizable composition for an optical material is filtered by the capsule filter 10 after being sheared by the upper power mixer 8, and then fed to the lower power mixer 9 which is a shearing part. In the lower power mixer 9, the polymerizable composition for an optical material is sheared. The polymerizable composition for an optical material is filtered by the capsule filter 10 after being sheared by the lower power mixer 9, and then fed to the stirring tank 11 which is a stirring part. The stirring tank 11 includes a stirrer 12. In the stirring tank 11, the polymerizable composition for an optical material is stirred by applying a force in a direction substantially parallel to and opposite to the flow direction. Thereafter, the polymerizable composition for an optical material is further mixed or stirred by the static mixer 13, and then is poured into the mold 14 which is the cured part by the casting part. Then, in the mold 14, the polymerizable composition for an optical material is cured by polymerizing two or more different monomers for an optical material in the polymerizable composition for an optical material.

[0131] The control panel 15 in FIG. 3 is an example of a manufacturing condition control device. In the control panel 15, the manufacturing conditions in the optical member manufacturing system can be controlled. Further, the control panel 15 can discharge at least a part of the polymerizable composition for an optical material in the stirring part from the casting part in order to replace at least a part of the polymerizable composition for an optical material by turning on the foot switch 16.

[0132] FIG. 4 is a diagram showing a configuration example of a computer that realizes the environmental load value fluctuation token arithmetic unit 100 and the manufacturing condition control device. The environmental load value fluctuation token calculation device 100 and the manufacturing condition control device can be realized by, for example, a computer 60 as shown in FIG. 4. The computer 60 that realizes the environmental load value fluctuation token calculation device 100 and the manufacturing condition control device includes a Central Processing Unit (CPU) 61, a memory 62 as a temporary storage area, and a non-volatile storage unit 63. Further, the computer includes an input / output interface (I / F) 64 to which input / output devices etc. (not shown) are connected, and a read / write (R / W) unit 65 that controls reading and writing of data to and from a recording medium 68. Further, the computer includes a network I / F 66 that is connected to a network such as the Internet. The CPU 61, the memory 62, the storage unit 63, the input / output I / F 64, the R / W unit 65, and the network I / F 66 are connected to each other via a bus 67. The storage unit 63 can be realized by a Hard Disk Drive (HDD), a Solid State Drive (SSD), a flash memory, or the like. A program for operating the computer is stored in the storage unit 63 as a storage medium. The CPU 61 reads the program from the storage unit 63 and expands it in the memory 62, and sequentially executes the processes included in the program. Thereby, various processing routines including the processing routine of FIG. 2 above are realized.

[0133] As described above, the environmental load value fluctuation token calculation device of the optical member manufacturing system according to the first embodiment calculates a fluctuation token according to the amount of fluctuation of the environmental load value from the amount of energy input to the polymerization unit in the manufacture of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, the amount of energy input to maintain the temperature of the space in which the polymerization unit is disposed, the environmental load value A calculated from the yield information of the optical member, and the environmental load value B generated under the optical member manufacturing conditions by a given polymerization. Thereby, a token corresponding to the fluctuation of the environmental load value in the manufacture of an optical member by polymerizing a composition containing a polymerizable compound for optical materials and a polymerization catalyst can be calculated. Further, based on the calculated variation token, the environmental load value variation token calculation device determines manufacturing conditions in optical member manufacturing such that the variation token becomes equal to or greater than a given value, and the manufacturing condition control device controls the manufacturing conditions in optical member manufacturing so as to be the determined manufacturing conditions. Thereby, it is possible to control the manufacturing conditions in optical member manufacturing such that the variation token becomes equal to or greater than a given value.

[0134] [Second Embodiment] Next, an optical member manufacturing system according to the second embodiment will be described. Note that parts having the same configuration as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted.

[0135] <Configuration of Environmental Load Value Variation Token Calculation Device According to the Present Embodiment> FIG. 5 is a block diagram showing an example of the functional configuration of the environmental load value variation token calculation device 200 of the present embodiment.

[0136] Functionally, as shown in FIG. 5, the environmental load value variation token calculation device 200 includes a first acquisition unit 102, a second acquisition unit 104, a third acquisition unit 106, a calculation unit 108, and an additional addition unit 210. When the environmental load value variation token calculated by the calculation unit 108 exceeds a given token value, the additional addition unit 210 adds an additional token to the environmental load value variation token calculated by the calculation unit 108.

[0137] <Operation of Optical Member Manufacturing System> Hereinafter, an example of a processing routine by the environmental load value variation token calculation device 200 will be described with reference to FIG. 6. Note that the same processes as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. First, in step S100, the first acquisition unit 102 acquires first energy amount information indicating the amount of energy input to the polymerization unit in optical member manufacturing described in the first embodiment. In step S102, the second acquisition unit 104 acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space where the polymerization part is arranged in the manufacture of the optical member. In step S104, the third acquisition unit 106 acquires yield information of the optical member manufactured by the manufacture of the optical member. In step S106, the calculation unit 108 calculates the environmental load value A in the manufacture of the optical member from the first energy amount information, the second energy amount information, and the yield information. In step S108, the calculation unit 108 calculates the environmental load value B generated under the optical member manufacturing conditions by a given polymerization, which is different from the manufacture of the optical member. In step S110, the calculation unit 108 calculates the first additional variation amount, the second additional variation amount, and the third additional variation amount of the environmental load value. Then, the calculation unit 108 calculates the variation amount of the environmental load value from the calculated environmental load value A and environmental load value B, and adds the first additional variation amount to the third additional variation amount to this variation amount of the environmental load value, thereby calculating the variation amount of the environmental load value in the manufacture of the optical member compared with the optical member manufacturing conditions by a given polymerization. In step S112, the calculation unit 108 multiplies the calculated variation amount of the environmental load value by a predetermined value to calculate a variation token.

[0138] In step S200, the additional granting unit 210 determines whether the variation token calculated in step S112 is greater than a given value. If the variation token calculated in step S112 is less than or equal to the given value, the processing routine ends. On the other hand, if the variation token calculated in step S112 is greater than the given value, the process proceeds to step S202. In step S202, the additional granting unit 210 grants an additional token to the variation token calculated in step S112 and ends the processing routine.

[0139] As described above, the environmental load value fluctuation token calculation device of the optical member manufacturing system according to the second embodiment calculates a fluctuation token corresponding to the amount of fluctuation of the environmental load value from the amount of energy input to the polymerization unit in the production of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, the amount of energy input to maintain the temperature of the space where the polymerization unit is arranged, and the environmental load value A calculated from the yield information of the optical member, and the environmental load value B generated under the optical member production conditions by a given polymerization. When the fluctuation token exceeds a given value, an additional token is added. Thereby, even when an additional token is added when the fluctuation token exceeds a given value, it is possible to cope with it.

Explanation of Signs

[0140] 15 ··· Control panel 60 ··· Computer 61 ··· CPU 62 ··· Memory 63 ··· Storage unit 64 ··· Input / output I / F 65 ··· R / W unit 66 ··· Network I / F 67 ··· Bus 68 ··· Recording medium 100 ··· Environmental load value fluctuation token calculation device 102 ··· First acquisition unit 104 ··· Second acquisition unit 106 ··· Third acquisition unit 108 ··· Calculation unit 110 ··· Manufacturing condition determination unit 200 ··· Environmental load value fluctuation token calculation device 210 ··· Additional addition unit

Claims

1. An environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the manufacture of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, a first acquisition unit that acquires first energy amount information indicating the amount of energy input to the polymerization unit in the manufacture of the optical member; a second acquisition unit that acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space in which the polymerization unit in the manufacture of the optical member is disposed; a third acquisition unit that acquires yield information of the optical member manufactured by the manufacture of the optical member; an arithmetic unit that calculates a fluctuation token corresponding to the amount of fluctuation of the environmental load value from the environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and the environmental load value B generated under the optical member manufacturing conditions by a given polymerization, which is different from the optical member manufacturing, from the first energy amount information, the second energy amount information, and the yield information; comprising: The environmental load value fluctuation token calculation device, wherein the optical member manufacturing conditions are manufacturing conditions of a casting polymerization method in which a polymerizable composition containing a monomer is injected into a mold and heat-cured.

2. The arithmetic unit: (1) The amount of fluctuation of the environmental load value calculated from the difference between the given number of polymerization units and the number of polymerization units used in the manufacture of the optical member, the environmental load value required for manufacturing one polymerization unit, and the environmental load value required for storing one polymerization unit, (2) The amount of fluctuation of the environmental load value calculated from the difference between the number of temperature adjustment devices for a given polymerization unit and the number of temperature adjustment devices for the polymerization unit used in the manufacture of the optical member, the environmental load value required for manufacturing one temperature adjustment device, and the environmental load value due to the exhaust heat of one temperature adjustment device, and (3) The amount of fluctuation of the environmental load value calculated from the environmental load value required for processing a given optical member and the environmental load value required for processing the optical member manufactured by the manufacture of the optical member at least one of, the environmental load value A, the environmental load value B, and calculates the fluctuation token. The environmental load value fluctuation token calculation device according to claim 1.

3. The arithmetic unit: The environmental load value fluctuation token calculation device according to claim 1 or 2, wherein the environmental load value A is calculated from the first energy amount information, the second energy amount information, the yield information, and the amount of cutting waste generated when processing the optical member manufactured in the polymerization unit in the manufacture of the optical member.

4. The environmental load value fluctuation token calculation device according to any one of claims 1 to 3, wherein the first energy amount information and the second energy amount information indicate the energy amount per optical member.

5. The environmental load value fluctuation token calculation device according to any one of claims 1 to 4, further comprising an additional granting unit that grants an additional token when the environmental load value fluctuation token calculated by the calculation unit exceeds a given token value.

6. The environmental load value fluctuation token calculation device according to any one of claims 1 to 5, wherein the viscosity of the composition is in the range of 10 mPa·s to 1000 mPa·s as measured by a B-type viscometer under the conditions of 25°C and 60 rpm.

7. The composition contains a prepolymer obtained by polymerizing at least two polymerizable compounds for optical materials among the two or more different polymerizable compounds for optical materials. The environmental load value fluctuation token calculation device according to any one of claims 1 to 6, which is a polymerizable composition for an optical material, wherein the content of the polymerization catalyst is 0.010 parts by mass to 2.0 parts by mass with respect to a total of 100 parts by mass of the two or more different polymerizable compounds for optical materials and the prepolymer.

8.

9. The environmental load value fluctuation token calculation device according to any one of claims 1 to 7, wherein one polymerizable compound for an optical material contains at least one compound selected from the group consisting of a polyisocyanate compound, an episulfide compound, and an epoxy compound.

10. The environmental load value fluctuation token calculation device according to any one of claims 1 to 8, wherein the other polymerizable compound for an optical material contains at least one active hydrogen compound selected from the group consisting of a polythiol compound having two or more mercapto groups, a hydroxythiol compound containing one or more mercapto groups and one or more hydroxyl groups, a polyol compound containing two or more hydroxyl groups, and an amine compound.

11. The environmental load value fluctuation token calculation device according to any one of claims 1 to 9, wherein the polymerization catalyst contains at least one selected from the group consisting of a basic catalyst having a pKa value of 4 to 8 and an organometallic catalyst.

12. The environmental load value fluctuation token calculation device according to any one of claims 1 to 10, further comprising a manufacturing condition determination unit that determines manufacturing conditions in the manufacture of the optical member so that the fluctuation token becomes a given value or more based on the calculated fluctuation token.

12. An environmental load value fluctuation token calculation device according to Claim 11, and a manufacturing condition control device that controls the manufacturing conditions in the optical member manufacturing so as to be the determined manufacturing conditions, An optical member manufacturing system including the same.

13. An environmental load value fluctuation token calculation method in an environmental load value fluctuation token calculation device that calculates an environmental load value fluctuation token in the manufacture of an optical member by polymerizing a composition containing two or more different polymerizable compounds for optical materials and a polymerization catalyst, a first acquisition unit acquires first energy amount information indicating the amount of energy input to the polymerization unit in the optical member manufacturing, a second acquisition unit acquires second energy amount information indicating the amount of energy input to maintain the temperature of the space in which the polymerization unit is disposed in the optical member manufacturing, a third acquisition unit acquires yield information of the optical member manufactured by the optical member manufacturing, a calculation unit calculates a variation token corresponding to the amount of variation in the environmental load value from the environmental load value A calculated from the first energy amount information, the second energy amount information, and the yield information, and the first energy amount information, the second energy amount information, and the yield information under the optical member manufacturing conditions in the optical member manufacturing conditions different from the optical member manufacturing, and the environmental load value B generated under the optical member manufacturing conditions, including wherein the optical member manufacturing conditions are manufacturing conditions of a casting polymerization method in which a polymerizable composition containing a monomer is injected into a mold and heat-cured, An environmental load value fluctuation token calculation method.

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