Specification
Title of Invention: Xylylene diisocyanate composition, modified xylylene diisocyanate composition, polymerizable composition, resin, molded article, optical element and lens
Technical field
[0001]
The present invention relates to a xylylene diisocyanate composition, a modified xylylene diisocyanate composition, a polymerizable composition, a resin, a molded article, an optical element and a lens.
Background technology
[0002]
Conventionally, a xylylene diisocyanate composition has been known as a raw material for poly(thio)urethane resins used in various industrial products (see Patent Document 1, for example).
prior art documents
patent literature
[0003]
Patent document 1: JP 2020-24453 A
SUMMARY OF THE INVENTION
Problems to be Solved by the Invention
[0004]
A xylylene diisocyanate composition such as that described in Patent Document 1 may contain compounds other than xylylene diisocyanate in addition to xylylene diisocyanate.
[0005]
However, depending on the purpose and application, resins are required to have excellent yellowing resistance and transparency. However, if the xylylene diisocyanate composition contains a specific compound, the yellowing resistance and transparency of the resin produced from the xylylene diisocyanate composition may be significantly reduced.
[0006]
Therefore, the present invention provides a xylylene diisocyanate composition, a modified xylylene diisocyanate composition, a polymerizable composition, a resin, a molded article, an optical element, and a lens that can stably produce a resin excellent in yellowing resistance and transparency. offer.
Means to solve problems
[0007]
The present invention [1] is a xylylene diisocyanate composition, wherein xylylene diisocyanate and the xylylene diisocyanate composition have a retention time of 14.0 when measured by gas chromatography mass spectrometry under the following measurement conditions. and a compound having a concentration of 2000 ppm or less.
[0008]
(Measurement conditions for gas chromatography mass spectrometry)
Column: HP19091L-433 HP-50+ (inner diameter 0.25 mm x length 30 m, film 0.25 μm),
Oven temperature: held at 50°C for 1 minute, heated from 50°C to 280°C at a rate of 10.0°C/min, held for 6 minutes after reaching 280°C,
　Carrier gas; He1.0ml/min　Constant flow mode,
Injection method; pulsed splitless method (150 kPa at 0.5 min),
Injection volume: 1.0 μL,
　Sample concentration: 1.0 mass% dichloromethane solution
Injection temperature; 200°C,
　Interface temperature; 280°C,
Quadrupole temperature; 150°C,
　Ion source temperature; 230°C,
Detection method; Scan method (m/z: 10-500).
[0009]
The present invention [2] includes the xylylene diisocyanate composition of [1] above, wherein the content of the compound exceeds 100 ppm.
The present invention [3] includes the xylylene diisocyanate composition of [1] above, wherein the content of the compound is 10 ppm or more.
[0010]
The present invention [4] includes the xylylene diisocyanate composition according to any one of [1] to [3] above, wherein the compound has a molecular weight of 161.
[0011]
The present invention [5] includes the xylylene diisocyanate composition according to any one of [1] to [4], wherein the compound is represented by the following general formula (1).
[0012]
[Chemical 1]

(In the general formula (1), R 1 represents a hydrogen atom, a methyl group or an ethyl group; R 2 represents a hydrogen atom, a methyl group, an ethyl group or a formyl group; m is an integer of 0 or more and 2 or less; indicates.)
The present invention [6] is the xylylene of [5] above, wherein the compound comprises a formyl group-containing isocyanate represented by the following chemical formula (2) and/or an ethyl group-containing isocyanate represented by the following chemical formula (3) Contains an isocyanate composition.
[0013]
[Chemical 2]

[0014]
[Chemical 3]

The present invention [7] contains xylylene diisocyanate and a compound represented by the following general formula (1) having a molecular weight of 161, and the content of the compound is 2000 ppm or less. Includes diisocyanate compositions.
[0015]
[Chemical 1]

(In the general formula (1), R 1 represents a hydrogen atom, a methyl group or an ethyl group; R 2 represents a hydrogen atom, a methyl group, an ethyl group or a formyl group; m is an integer of 0 or more and 2 or less; indicates.)
The present invention [8] includes the xylylene diisocyanate composition of [7] above, wherein the content of the compound exceeds 100 ppm.
The present invention [9] includes the xylylene diisocyanate composition of [7] above, wherein the content of the compound is 10 ppm or more.
[0016]
The present invention [10] provides the above [7] to [9], wherein the compound comprises a formyl group-containing isocyanate represented by the following chemical formula (2) and/or an ethyl group-containing isocyanate represented by the following chemical formula (3). ] any one xylylene diisocyanate composition.
[0017]
[Chemical 2]

[0018]
[Chemical 3]

The present invention [11] further comprises chloromethylbenzyl isocyanate, and the xylylene diisocyanate according to any one of the above [1] to [10], wherein the content of the chloromethylbenzyl isocyanate is 0.2 ppm or more and 3000 ppm or less. including compositions.
[0019]
The present invention [12] is a modified composition obtained by modifying the xylylene diisocyanate composition according to any one of [1] to [11] above, and has the following functional groups (a) to (i) Contains at least one modified xylylene diisocyanate composition.
(a) an isocyanurate group,
(b) an allophanate group,
(c) a biuret group,
(d) a urethane group,
(e) a urea group,
(f) an iminooxadiazinedione group,
(g) a uretdione group,
(h) a uretonimine group,
(i) a carbodiimide group;
[0020]
The present invention [13] provides an isocyanate component containing the xylylene diisocyanate composition of any one of [1] to [11] and/or the modified xylylene diisocyanate composition of [12] above, and an active and a polymerizable composition comprising a hydrogen group-containing component.
[0021]
The present invention [14] includes a resin that is a cured product of the polymerizable composition of [13] above.
[0022]
The present invention [15] includes a molded body containing the resin of [14] above.
[0023]
The present invention [16] includes an optical element including the molded article of [15] above.
[0024]
The present invention [17] includes a lens including the optical element of [16] above.
Effect of the invention
[0025]
The xylylene diisocyanate composition of the present invention contains xylylene diisocyanate and the above compound, and the content of the above compound is equal to or less than the above upper limit. Therefore, the resin produced from the xylylene diisocyanate composition described above is excellent in yellowing resistance and transparency.
[0026]
The modified xylylene diisocyanate composition of the present invention is obtained by modifying the xylylene diisocyanate composition described above. Therefore, the resin produced from the modified xylylene diisocyanate composition described above is excellent in yellowing resistance and transparency.
[0027]
The polymerizable composition of the present invention contains the above xylylene diisocyanate composition and/or the above modified xylylene diisocyanate composition as an isocyanate component. Therefore, the resin produced from the polymerizable composition described above is excellent in yellowing resistance and transparency.
[0028]
The resin, molded article, optical element and lens of the present invention include the cured polymerizable composition described above. Therefore, resins, moldings, optical elements and lenses are excellent in yellowing resistance and transparency.
MODE FOR CARRYING OUT THE INVENTION
[0029]
1. Xylylene diisocyanate composition
The xylylene diisocyanate composition of the present invention contains 99% by mass or more of xylylene diisocyanate as a main component and is substantially a single compound (that is, xylylene diisocyanate). Specifically, it is defined as a xylylene diisocyanate composition because it contains a specific isocyanate compound).
[0030]
That is, the xylylene diisocyanate composition of the present invention contains xylylene diisocyanate and the specific compound described later as essential components.
[0031]
In the following, the xylylene diisocyanate composition will be referred to as the XDI composition, and the xylylene diisocyanate will be referred to as XDI.
[0032]
Examples of XDI include 1,2-XDI (o-XDI), 1,3-XDI (m-XDI), and 1,4-XDI (p-XDI).
[0033]
These XDIs can be used singly or in combination of two or more.
[0034]
Among the XDIs, 1,3-XDI (m-XDI) is preferred.
[0035]
　XDI can be produced, for example, by a known hydrochloride method. Specifically, XDI can be produced by reacting xylylenediamine hydrochloride and phosgene under normal pressure (0.1 MPa). In addition, XDI is purified, for example, by a known purification method, if necessary. Purification methods include, for example, rectification (distillation) and extraction.
[0036]
The content ratio (purity) of XDI, relative to the total mass of the XDI composition, is, for example, 99.00% by mass or more, preferably 99.50% by mass or more, more preferably 99.60% by mass or more, and further Preferably, it is 99.80% by mass or more and, for example, 99.95% by mass or less. The content of XDI can be measured according to the method described in paragraph [0377] of Japanese Patent No. 6373536.
[0037]
The specific compound is included in the XDI composition, for example, by being added to XDI. It should be noted that the specific compound may be a by-product in the production of XDI described above and may be contained in the XDI composition.
When the specific compound is a by-product in the production of XDI and is contained in the XDI composition, there is no limitation on the method of adjusting the content of the specific compound contained in the XDI composition. The content ratio of the specific compound contained in the XDI composition can be adjusted by known methods such as distillation and column purification.
[0038]
When the XDI composition is measured by gas chromatography mass spectrometry under the following measurement conditions, the retention time of the specific compound is 14.0 minutes to 14.6 minutes.
(Measurement conditions for gas chromatography mass spectrometry)
Column: HP19091L-433 HP-50+ (inner diameter 0.25 mm x length 30 m, film 0.25 μm),
Oven temperature: held at 50°C for 1 minute, heated from 50°C to 280°C at 10.0°C/min, held for 6 minutes after reaching 280°C,
　Carrier gas; He1.0ml/min　Constant flow mode,
Injection method; pulsed splitless method (150 kPa at 0.5 min),
Injection volume: 1.0 μL,
　Sample concentration: 1.0 mass% dichloromethane solution,
Injection temperature; 200°C,
　Interface temperature; 280°C,
Quadrupole temperature; 150°C,
　Ion source temperature; 230°C,
Detection method; Scan method (m/z: 10-500).
[0039]
The molecular weight of the specific compound is 161. Specific examples of the specific compound include isocyanate compounds represented by the following general formula (1).
[0040]
General formula (1)
[Chemical 1]

(In general formula (1), R 1 represents a hydrogen atom, a methyl group or an ethyl group; R 2 represents a hydrogen atom, a methyl group, an ethyl group or a formyl group; m is an integer of 0 or more and 2 or less; indicates.)
In general formula (1), R 1 preferably represents a hydrogen atom.
[0041]
In general formula (1), R 2 is preferably an ethyl group orrepresents a formyl group.
[0042]
In general formula (1), m preferably represents 1.
[0043]
The isocyanate compound represented by the general formula (1) preferably contains a formyl group-containing isocyanate represented by the following chemical formula (2) and/or an ethyl group-containing isocyanate represented by the following chemical formula (3), more preferably contains a formyl group-containing isocyanate represented by the following chemical formula (2).
[0044]
Chemical formula (2)
[Chemical 2]

[0045]
Chemical formula (3)
[Chemical 3]

The content of the specific compound is, for example, 0.1 ppm, preferably 1 ppm or more, more preferably 10 ppm or more, still more preferably 100 ppm or more and 2000 ppm or less, relative to the total mass of the XDI composition. It is preferably 1700 ppm or less, more preferably 1500 ppm or less, still more preferably 1200 ppm or less, and particularly preferably 1000 ppm or less. The content ratio of the specific compound can be calculated according to the method described in Examples below. Note that the upper limit and the lower limit can be appropriately combined.
[0046]
If the content of the specific compound is equal to or higher than the above lower limit, it is possible to improve the dyeability of the resin produced from the XDI composition. Further, when the content of the specific compound is equal to or higher than the above lower limit, it is possible to suppress deterioration of the storage stability of the XDI composition. Moreover, when the content of the specific compound is equal to or higher than the above lower limit, the specific compound can be easily reduced, and a decrease in the productivity of the XDI composition can be suppressed. If the content of the specific compound is equal to or less than the above upper limit, it is possible to improve the yellowing resistance and transparency of the resin produced from the XDI composition.
[0047]
The XDI composition may also contain chloromethylbenzyl isocyanate (monochloromethylbenzyl isocyanate) represented by the following chemical formula (4). In the following, chloromethylbenzyl isocyanate is referred to as CBI.
[0048]
Chemical formula (4)
[Chemical 4]

CBI is a chlorine compound produced as a by-product in the production of XDI mentioned above. In other words, CBI may be produced as a by-product in the production of XDI. The structural isomer of CBI produced as a by-product in the production of XDI corresponds to the structural isomer of XDI produced.
[0049]
Examples of CBI include o-CBI, m-CBI and p-CBI.
[0050]
The content of CBI is, for example, 0 ppm or more, preferably 0.2 ppm or more, preferably 6 ppm or more, more preferably 100 ppm or more, and, for example, 5000 ppm or less, with respect to the total mass of the XDI composition. is 4000 ppm or less, more preferably 3000 ppm or less, particularly preferably 1600 ppm or less, particularly preferably 1000 ppm or less. The content of CBI can be measured according to the method described in paragraph [0377] of Japanese Patent No. 6373536.
[0051]
If the content of CBI is within the above range, it is possible to reliably improve the yellowing resistance of the resin produced from the XDI composition. In particular, when the content of CBI is equal to or less than the above upper limit, it is possible to reliably improve the yellowing resistance of the resin produced from the XDI composition, and to improve the mechanical properties of the resin.
The XDI composition may also contain dichloromethylbenzyl isocyanate. In the following, dichloromethylbenzyl isocyanate is referred to as DCI.
The DCI content is, for example, 0.1 ppm or more, preferably 0.3 ppm or more, more preferably 0.6 ppm or more, more preferably 1.0 ppm or more, relative to the total mass of the XDI composition. , for example, 60 ppm or less, preferably 50 ppm or less, more preferably 30 ppm or less, more preferably 20 ppm or less.
If the content of DCI is within the above range, yellowing and/or clouding of the resin produced from the XDI composition can be suppressed.
The DCI content can be measured according to the method described in paragraph [0376] of Japanese Patent No. 6373536.
[0052]
In addition, the XDI composition can contain other ingredients. Other ingredients include, for example, dichloromethaneimino-methylbenzyl isocyanate, xylylene dichloride, and cyanobenzyl isocyanate.
[0053]
The XDI composition may contain only one of the other components, or may contain two or more.
[0054]
The content of other components is, for example, 0 ppm or more, and, for example, 0.2 ppm or less, preferably 300 ppm or less, relative to the total mass of the XDI composition.
[0055]
The concentration of hydrolyzable chlorine (HC) in the XDI composition is, for example, 10 ppm or more, preferably 20 ppm or more, more preferably 30 ppm or more, and, for example, 1000 ppm or less, preferably 500 ppm or less, more preferably 200 ppm. It is below.
The concentration (HC) of hydrolyzable chlorine is measured according to the method for determining hydrolyzable chlorine described in JIS K-1603-3 (2007).
[0056]
2. Xylylene diisocyanate modified composition
The above XDI composition is modified by a known method if necessary.
[0057]
A modified xylylene diisocyanate composition (hereinafter referred to as a modified XDI composition) is produced by modifying the XDI composition described above and contains at least one of the following functional groups (a) to (i): do.
(a) an isocyanurate group,
(b) an allophanate group,
(c) a biuret group,
(d) a urethane group,
(e) a urea group,
(f) an iminooxadiazinedione group,
(g) a uretdione group,
(h) a uretonimine group,
(i) a carbodiimide group;
[0058]
More specifically, the XDI-modified composition containing the functional group (isocyanurate group) of (a) above contains a trimer of XDI. It can be obtained by isocyanurating (eg, trimerizing) XDI by reacting in the presence.
[0059]
The modified XDI composition containing the functional group (allophanate group) of (b) above contains an allophanate modified XDI, and for example, the XDI composition is reacted with a monohydric alcohol or a dihydric alcohol. After that, it can be obtained by further reacting in the presence of a known allophanatization catalyst.
[0060]
The XDI modified composition containing the functional group (biuret group) of (c) above contains a biuret modified XDI, for example, the XDI composition is reacted with water or a secondary amine After that, it can be obtained by further reacting in the presence of a known biuret catalyst.
[0061]
The XDI-modified composition containing the functional group (urethane group) of (d) above contains a polyol-modified XDI. can be obtained by the reaction of
[0062]
The XDI-modified composition containing the functional group (urea group) of (e) above contains a polyamine-modified XDI, and can be obtained, for example, by reacting the XDI composition with polyamine.
[0063]
The modified XDI composition containing the above functional group (f) (iminooxadiazinedione group) contains the iminooxadiazinedione modified form of XDI (asymmetric trimer). can be obtained by reacting XDI in the presence of a known iminooxadiazine dionization catalyst to iminooxadiazine dionization (eg, trimerization) of XDI.
[0064]
The XDI-modified composition containing the functional group (uretdione group) of (g) contains the uretdione-modified XDI. For example, the XDI composition is reacted in the presence of a known uretdione catalyst. , XDI can be obtained by uretdiionization (eg, dimerization).
[0065]
The modified XDI composition containing the functional group (h) (uretonimine group) contains the modified uretonimine of XDI. For example, the XDI composition is reacted in the presence of a known carbodiimidation catalyst, It can be obtained by forming a carbodiimide group and then adding XDI to the carbodiimide group.
[0066]
The XDI-modified composition containing the functional group (carbodiimide group) of (i) above contains a carbodiimide-modified XDI, and for example, the XDI composition is reacted in the presence of a known carbodiimidation catalyst. can be obtained by
[0067]
The modified XDI composition should contain at least one of the above functional groups (a) to (i), and may contain two or more. Such an XDI modified composition is produced by appropriately combining the above reactions.
[0068]
In addition, the XDI modified composition can be used alone or in combination of two or more.
[0069]
　
The above XDI composition contains XDI and the above specific compound, and the content of the above specific compound is equal to or less than the above upper limit. Further, the modified XDI composition described above is obtained by modifying the XDI composition described above.
[0070]
Therefore, resins produced from the above XDI composition and/or the above XDI modified composition are excellent in yellowing resistance and transparency.
[0071]
In the above-described embodiment, the specific compound includes the compound represented by the general formula (1), and specifically, the formyl group-containing isocyanate represented by the chemical formula (2) and the chemical formula (3). and ethyl group-containing isocyanates. However, the specific compound is not limited to this.
[0072]
When the XDI composition is measured by gas chromatography mass spectrometry under the above measurement conditions, if the compound has a retention time of 14.0 minutes to 14.6 minutes, the specific compound is represented by the above general formula (1) May not be included.
[0073]
In addition, if the compound is contained in the above general formula (1) and has a molecular weight of 161, the retention time of the specific compound is the retention time when the XDI composition is measured by gas chromatography mass spectrometry under the above measurement conditions. The time may be outside the range of 14.0 minutes to 14.6 minutes.
[0074]
3. Polymerizable composition
The XDI composition and/or modified XDI composition described above is suitably used as a raw material for resin. More specifically, the XDI composition and/or the modified XDI composition is included as an isocyanate component in the polymerizable composition that is the raw material of the resin.
[0075]
The polymerizable composition contains an isocyanate component and an active hydrogen group-containing component.
[0076]
The isocyanate component contains the XDI composition and/or the XDI modified composition, and preferably consists of the XDI composition and/or the XDI modified composition.
[0077]
Active hydrogen group-containing components include, for example, polyol components, polythiol components, and polyamine components.
[0078]
The components containing active hydrogen groups can be used alone or in combination of two or more.
[0079]
Among active hydrogen group-containing components, polyol components and polythiol components are preferred.
[0080]
Polyol components include, for example, low-molecular-weight polyols and high-molecular-weight polyols.
[0081]
A low-molecular-weight polyol is a compound having two or more hydroxyl groups and a number-average molecular weight of 60 or more and less than 400, preferably 300 or less. Low molecular weight polyols include, for example, dihydric alcohols, trihydric alcohols, tetrahydric alcohols, pentahydric alcohols, hexahydric alcohols, heptahydric alcohols, and octahydric alcohols. Among the low molecular weight polyols, preferably dihydric alcohols and trihydric alcohols are mentioned.be
[0082]
Examples of dihydric alcohols include ethylene glycol, propylene glycol, 1,3-propanediol, 1,4-butylene glycol, 1,3-butylene glycol, 1,5-pentanediol, 1,6-hexanediol, and neopentyl. Glycol, alkane (7-22) diol, diethylene glycol, triethylene glycol, dipropylene glycol, 3-methyl-1,5-pentanediol, alkane-1,2-diol (C (carbon number, hereinafter the same) 17- 20), isosorbide, 1,3- or 1,4-cyclohexanedimethanol and mixtures thereof, 1,4-cyclohexanediol, hydrogenated bisphenol A, 1,4-dihydroxy-2-butene, 2,6-dimethyl- 1-octene-3,8-diol and bisphenol A are included.
[0083]
Examples of trihydric alcohols include glycerin and trimethylolpropane.
[0084]
Also, examples of low-molecular-weight polyols include polyalkylene oxides having a number average molecular weight of 60 or more and less than 400. Polyalkylene oxides include random and/or block copolymers of two or more alkylene oxides. A polyalkylene oxide is obtained by adding an alkylene oxide (eg, ethylene oxide, propylene oxide) to the above alcohol as an initiator.
[0085]
A high molecular weight polyol is a compound having two or more hydroxyl groups and a number average molecular weight of 400 or more, preferably 500 or more, and for example, 10000 or less, preferably 5000 or less.
[0086]
Examples of high-molecular-weight polyols include polyether polyols, polyester polyols, polycarbonate polyols, polyurethane polyols, epoxy polyols, vegetable oil polyols, polyolefin polyols, acrylic polyols, silicone polyols, fluorine polyols, and vinyl monomer-modified polyols.
[0087]
Such polyol components can be used alone or in combination of two or more.
[0088]
The hydroxyl value of the polyol component is, for example, 5 mgKOH/g or more, preferably 10 mgKOH/g or more, and for example, 300 mgKOH/g or less, preferably 250 mgKOH/g or less. The hydroxyl value can be measured by an acetylation method or a phthalation method conforming to JISK1557-1 method A or B.
[0089]
In addition, the number average molecular weight of the polyol component is, for example, 2000 or more, preferably 5000 or more, and for example, 100000 or less, preferably 50000 or less in terms of standard polystyrene by gel permeation chromatography (GPC) measurement. .
[0090]
Examples of polythiol components include methanedithiol, 1,2-ethanedithiol, 1,2,3-propanetrithiol, 1,2-cyclohexanedithiol, bis(2-mercaptoethyl)ether, tetrakis(mercaptomethyl)methane, and diethylene glycol. bis(2-mercaptoacetate), diethylene glycol bis(3-mercaptopropionate), ethylene glycol bis(2-mercaptoacetate), ethylene glycol bis(3-mercaptopropionate), trimethylolpropane tris(2-mercaptoacetate) ), trimethylolpropane tris (3-mercaptopropionate), trimethylolethane tris (2-mercaptoacetate), trimethylolethane tris (3-mercaptopropionate), pentaerythritol tetrakis (2-mercaptoacetate), penta Erythritol tetrakis(3-mercaptopropionate), bis(mercaptomethyl)sulfide, bis(mercaptomethyl)disulfide, bis(mercaptoethyl)sulfide, bis(mercaptoethyl)disulfide, bis(mercaptopropyl)sulfide, bis(mercaptomethylthio) ) methane, bis(2-mercaptoethylthio)methane, bis(3-mercaptopropylthio)methane, 1,2-bis(mercaptomethylthio)ethane, 1,2-bis(2-mercaptoethylthio)ethane, 1, 2-bis(3-mercaptopropylthio)ethane, 1,2,3-tris(mercaptomethylthio)propane, 1,2,3-tris(2-mercaptoethylthio)propane, 1,2,3-tris(3 -mercaptopropylthio)propane, 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiundecane, 4, 7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiundecane, tetrakis(mercaptomethylthio methyl)methane, tetrakis(2-mercaptoethylthiomethyl)methane, tetrakis(3-mercaptopropylthiomethyl)methane, bis(2,3-dimercaptopropyl)sulfide, 2,5-dimercaptomethyl-1,4- dithiane, 2,5-dimercap thio-1,4-dithiane, 2,5-dimercaptomethyl-2,5-dimethyl-1,4-dithiane, and their esters of thioglycolic acid and mercaptopropionic acid, hydroxymethylsulfide bis(2-mercaptoacetate ), hydroxymethylsulfide bis (3-mercaptopropionate), hydroxyethyl sulfide bis (2-mercaptoacetate), hydroxyethyl sulfide bis (3-mercaptopropionate), hydroxymethyl disulfide bis (2-mercaptoacetate), Hydroxymethyl disulfide bis (3-mercaptopropionate), Hydroxyethyl disulfide bis (2-mercaptoacetate), Hydroxyethyl disulfide bis (3-mercaptopropionate), 2-mercaptoethyl ether bis (2-mercaptoacetate), 2 - Mercaptoethyl ether bis(3-mercaptopropionate), bis(2-mercaptoethyl ester) thiodiglycolate, bis(2-mercaptoethyl ester) thiodipropionate, bis(2-mercaptoethyl dithiodiglycolate) ester), bis(2-mercaptoethyl ester) dithiodipropionate, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, 4,6- bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithiethane, 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane, aliphatic polythiol compounds such as tris(mercaptomethylthio)methane, tris(mercaptoethylthio)methane, 2,5-bis(mercaptomethyl)-1,4-dithiane;
1,2-dimercaptobenzene, 1,3-dimercaptobenzene, 1,4-dimercaptobenzene, 1,2-bis(mercaptomethyl)benzene, 1,3-bis(mercaptomethyl)benzene, 1,4- bis(mercaptomethyl)benzene, 1,2-bis(mercaptoethyl)benzene, 1,3-bis(mercaptoethyl)benzene, 1,4-bis(mercaptoethyl)benzene, 1,3,5-trimercaptobenzene, 1,3,5-tris(mercaptomethyl)benzene, 1,3,5-tris(mercaptomethylenoxy)benzene, 1,3,5-tris(mercaptoethyleneoxy)benzene, 2,5-toluenedithiol, 3, aromatic polythiol compounds such as 4-toluenedithiol, 1,5-naphthalenedithiol, and 2,6-naphthalenedithiol;
Heterocyclic polythiol compounds such as 2-methylamino-4,6-dithiol-sym-triazine, 3,4-thiophenedithiol, and bismuthiol are included.
[0091]
Such polythiol components can be used alone or in combination of two or more.
[0092]
As the polythiol component, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9 - trithiundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiundecane, 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, pentaerythritol tetrakis ( 2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptopropionate), 2,5-bis(mercaptomethyl)-1,4-dithiane, bis(mercaptoethyl) sulfide, 1,1,3,3-tetrakis (Mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithiethane, 1,1,2,2 - tetrakis(mercaptomethylthio)ethane, 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane, tris(mercaptomethylthio)methane, ethylene glycol bis(3-mercaptopropionate) and diethylene glycol bis(3-mercapto propionate) is preferably at least one selected from the group consisting of
[0093]
　
The above polymerizable composition contains the above XDI composition and/or the above XDI modified composition as an isocyanate component. Therefore, the resin produced from the polymerizable composition described above is excellent in yellowing resistance and transparency.
[0094]
4. resin
A resin is produced by reacting the above isocyanate component with the above active hydrogen group-containing component. In other words, the resin is a cured product of the polymerizable composition. The resin is preferably molded by a known molding method. That is, the molded body contains resin.
[0095]
An example of a resin molded body is an optical element.
[0096]
Examples of optical elements include lenses, sheets and films, preferably lenses.
[0097]
A lens is produced, for example, by reacting the XDI composition described above with the polythiol component described above. In the manufacture of lenses, for example, casting methods can be employed.
[0098]
Examples of lenses include transparent lenses, sunglasses lenses, polarized lenses, eyeglass lenses, camera lenses, pickup lenses, and contact lenses.
[0099]
The polymerizable composition can also be prepared as a two-component curing resin raw material.
[0100]
The two-component curable resin raw material contains A agent as a curing agent and B agent as a main agent.
[0101]
Agent A contains, for example, the XDI modified composition described above. Agent B contains, for example, the above-described polyol component.
[0102]
Examples of two-component curing resin raw materials include two-component curing coating raw materials. Coatings include, for example, paints and adhesives.
[0103]
　
The resins, moldings, optical elements, lenses and coatings described above include cured products of the polymerizable compositions described above. Therefore, resins, moldings, optical elements, lenses and coatings are excellent in yellowing resistance and transparency.
Example
[0104]
The present invention will be explained more specifically by showing examples below, but the present invention is not limited to them. Specific numerical values ​​such as the mixing ratio (content ratio), physical property values, and parameters used in the following description are described in the above "Mode for Carrying Out the Invention", the corresponding mixing ratio (content ratio ), physical properties, parameters, etc.values ​​defined in "Parts" and "%" are based on mass unless otherwise specified.
[0105]

In the examples, the evaluation methods for each physical property of the plastic lens are as follows.
[0106]

Using a Pulfrich refractometer KPR-30 manufactured by Shimadzu Corporation, the refractive index ( ne, nF', nC') were measured, and the refractive index (ne) and Abbe's number (νe) were obtained.
[0107]

Using a thermomechanical analyzer TMA-60 manufactured by Shimadzu Corporation, the glass transition temperature Tg was measured by the TMA penation method (50 g load, pin tip 0.5 mmφ, temperature increase rate 10 ° C./min), and heat resistance as an indicator of
[0108]
The resin was prepared as a circular flat plate plastic lens with a thickness of 9 mm and a diameter of 75 mm, and a spectrophotometer CM-5 manufactured by Konica Minolta Co., Ltd. using Y. I. sought the value.
[0109]
It should be noted that Y. I. The smaller the value, the better the hue of the plastic lens. I. There is a correlation that the larger the value, the worse the hue.
[0110]

The resin was made into a circular flat plate plastic lens with a thickness of 9 mm and a diameter of 75 mm, and light from a light source (Luminar Ace LA-150A manufactured by Hayashi Repic) was transmitted through the flat plate lens. An image of light transmitted through the flat lens was captured in an image processing device (manufactured by Ube Information Systems Co., Ltd.), and the captured image was subjected to gradation processing. The degree of gradation of the processed image was quantified for each pixel, and the average value of the numerical values ​​of the degree of gradation of each pixel was obtained to obtain the degree of devitrification of the planar lens.
[0111]
The smaller the degree of devitrification, the less the transparency of the resin (flat lens in this case) is impaired (that is, the transparency of the resin is excellent).
[0112]
2. Preparation Example 1: Preparation of XDI
An autoclave (internal volume: 2 m3) equipped with a reflux condenser, a stirring blade, a thermometer, a hydrogen chloride gas inlet tube, a phosgene inlet tube, a raw material tank, and a raw material charging pump and equipped with a pressure regulator was used as a reactor. . The reactor was charged with 846 kg of ortho-dichlorobenzene as an inert solvent, and the raw material tank was charged with 136.2 kg (1.0 kmol) of m-xylylenediamine and 621 kg of ortho-dichlorobenzene (total amine concentration: 8.0 kg). 5% by mass).
[0113]
Next, after raising the temperature inside the reactor to 120°C, the internal pressure was adjusted to 0.01 MPa higher than the atmospheric pressure. Then, hydrogen chloride gas was started to be charged into the reactor from the hydrogen chloride gas introduction pipe at a rate of 43.8 kg/hr, and m-xylylenediamine diluted with an inert solvent was simultaneously charged from the raw material tank. Charging was started with a pump at a rate of 379 kg/hr, and the entire amount was charged over 2 hours. After that, it was aged for 1 hour while charging hydrogen chloride gas at 20 kg/hr.
[0114]
Next, after heating the reaction solution (hydrochloride slurry) to 160° C. in the reactor, phosgene was introduced at a rate of 100 kg/hr (1.0 kmol/hr) through the phosgene introduction pipe, and the temperature was maintained for 8 hours. reacted. After completion of the reaction, unreacted phosgene and hydrogen chloride gas were removed by purging nitrogen into the reactor. Then, the reaction solution was filtered to remove 0.8 kg (dry weight) of unreacted hydrochloride. The obtained filtrate was desolvated to obtain 188.6 kg of a reaction mass having m-XDI purity of 98.10%.
[0115]
Then, the resulting reaction mass was rectified to obtain m-XDI with an m-XDI purity of 99.99% by mass.
[0116]
3. Preparation Example 2: Preparation of formyl group-containing isocyanate
In a 500 ml scale pressure-resistant autoclave, 10 g (0.078 mol) of 1,3-dicyanobenzene (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) and 5 mass% palladium-supported carbon catalyst (manufactured by NE Chemcat, NX type 49 mass% water content) 16.6 g (0.0078 mol of palladium) and 100 g of methanol (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) as a reaction solvent were charged.
[0117]
Next, nitrogen is supplied into the autoclave to raise the pressure inside the autoclave to 3.1 MPa (absolute pressure), and then the nitrogen is discharged from the autoclave to raise the pressure inside the autoclave to 0.2 MPa (absolute pressure). lowered. This operation was repeated four times to replace the inside of the autoclave with nitrogen.
[0118]
Next, hydrogen is supplied into the autoclave to raise the pressure inside the autoclave to 2.1 MPa (absolute pressure), and then the hydrogen is discharged from the autoclave to raise the pressure inside the autoclave to 0.2 MPa (absolute pressure). lowered. This operation was repeated four times to replace the inside of the autoclave with hydrogen.
[0119]
Next, hydrogen was supplied into the autoclave using a pressure accumulator to raise the pressure inside the autoclave to 1.0 MPa (absolute pressure). Then, while maintaining the pressure in the autoclave, the contents in the autoclave were stirred to hydrogenate the 1,3-dicyanobenzene.
[0120]
When about 75% of the theoretical amount of hydrogen absorption was completed, the inside of the autoclave was replaced with nitrogen to remove hydrogen from the inside of the autoclave.
[0121]
Then, the reaction solution was filtered through filter paper to remove the palladium-supported carbon catalyst from the reaction solution. The filtrate was then concentrated on a rotary evaporator. After that, a vacuum pump was used to remove low-boiling components from the concentrated filtrate.
[0122]
Thus, a composition containing 1-iminomethyl-3-(aminomethyl)benzene as a main component was obtained. The composition was hydrolyzed to obtain a composition containing 3-(aminomethyl)benzaldehyde as a main component.
[0123]
Next, a composition containing 3-(aminomethyl)benzaldehyde as a main component is reacted with triphosgene in toluene to prepare a formyl group-containing isocyanate (3-(isocyanatomethyl)benzaldehyde) represented by the above chemical formula (2). did. After toluene was distilled off from the reaction solution, a formyl group-containing isocyanate was obtained by distillation under reduced pressure.
[0124]
When the obtained formyl group-containing isocyanate was analyzed under the measurement conditions of gas chromatography mass spectrometry described above, a peak was confirmed at a retention time of 14.0 to 14.6 minutes.
[0125]
4. Examples 1-4 and Comparative Example 1
The XDI obtained in Preparation Example 1 and the formyl group-containing isocyanate obtained in Preparation Example 2 were mixed so that the content of the formyl group-containing isocyanate in the XDI composition was the value shown in Table 1. This gave an XDI composition.
[0126]
The content of the formyl group-containing isocyanate in the XDI composition was determined by adding the following internal standard substance to the obtained XDI composition and analyzing it under the measurement conditions of gas chromatography mass spectrometry described above. It was calculated from the area ratio between the internal standard substance appearing at 12.1 minutes and the formyl group-containing isocyanate appearing at retention times of 14.0 to 14.6 minutes. Table 1 shows the results.
[0127]
Internal standard substance; Add 0.5 mg of methylnaphthalene to 100 mg of the analysis sample to make a constant volume of 10 mL.
[0128]
5. Manufacture of plastic lenses
52 parts by mass of the XDI composition of each example and each comparative example, 0.01 part by mass of dibutyltin dichloride as a curing catalyst, 0.10 parts by mass of Zelec UN (trade name Stepan product; acidic phosphate ester), Biosorb 583 ( 1.5 parts by mass of an ultraviolet absorber manufactured by Sakai Chemical Co., Ltd. was mixed and dissolved at 20°C. 48 parts by mass of a polythiol component containing 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane as a main component was charged and mixed to obtain a homogeneous mixed liquid. This homogeneous liquid was defoamed at 600 Pa for 1 hour, filtered through a 1 μm Teflon (registered trademark) filter, and then poured into a mold consisting of a glass mold and a tape. This mold was put into an oven, and the temperature was gradually raised from 10° C. to 120° C., and polymerization was carried out in 38 hours. After the polymerization was completed, the mold was removed from the oven and released to obtain a resin. The obtained resin was further annealed at 120° C. for 1 hour to produce a plastic lens. Each physical property was obtained based on the evaluation method for each physical property of the plastic lens described above. Table 1 shows the results.
[0129]
[table 1]

Although the above invention has been provided as an exemplary embodiment of the present invention, this is merely an illustration and should not be construed as limiting. Variations of the invention that are obvious to those skilled in the art are included in the following claims.
Industrial applicability
[0130]
The xylylene diisocyanate composition, modified xylylene diisocyanate composition, polymerizable composition, resin and molded article of the present invention are used for optical elements such as lenses, sheets and films.

The scope of the claims

[Claim 1]
A xylylene diisocyanate composition,
　　Xylylene diisocyanate and
and a compound whose retention time is 14.0 to 14.6 minutes when the xylylene diisocyanate composition is measured by gas chromatography mass spectrometry under the following measurement conditions,
A xylylene diisocyanate composition, wherein the content of the compound is 2000 ppm or less.
(Measurement conditions for gas chromatography mass spectrometry)
Column: HP19091L-433 HP-50+ (inner diameter 0.25 mm x length 30 m, film 0.25 μm),
Oven temperature: held at 50°C for 1 minute, heated from 50°C to 280°C at 10.0°C/min, held for 6 minutes after reaching 280°C,
　Carrier gas; He1.0ml/min　Constant flow mode,
Injection method; pulsed splitless method (150 kPa at 0.5 min),
Injection volume: 1.0 μL,
　Sample concentration: 1.0 mass% dichloromethane solution
Injection temperature; 200°C,
　Interface temperature; 280°C,
Quadrupole temperature; 150°C,
　Ion source temperature; 230°C,
Detection method; Scan method (m/z: 10-500).
[Claim 2]
The xylylene diisocyanate composition according to claim 1, wherein the content of the compound exceeds 100 ppm.
[Claim 3]
The xylylene diisocyanate composition according to claim 1, wherein the content of the compound is 10 ppm or more.
[Claim 4]
The xylylene diisocyanate composition according to any one of claims 1 to 3, wherein the compound has a molecular weight of 161.
[Claim 5]
The xylylene diisocyanate composition according to any one of claims 1 to 4, wherein the compound is represented by the following general formula (1).
[Chemical 1]

(In general formula (1), R 1 represents a hydrogen atom, a methyl group or an ethyl group; R 2 represents a hydrogen atom, a methyl group, an ethyl group or a formyl group; m is an integer of 0 or more and 2 or less; indicates.)
[Claim 6]
The xylylene diisocyanate composition according to claim 5, wherein the compound contains a formyl group-containing isocyanate represented by the following chemical formula (2) and/or an ethyl group-containing isocyanate represented by the following chemical formula (3).
[Chemical 2]

[Chemical 3]

[Claim 7]
with xylylene diisocyanate,
a compound represented by the following general formula (1) having a molecular weight of 161,
A xylylene diisocyanate composition, wherein the content of the compound is 2000 ppm or less.
[Chemical 1]

(In general formula (1), R 1 represents a hydrogen atom, a methyl group or an ethyl group; R 2 represents a hydrogen atom, a methyl group, an ethyl group or a formyl group; m is an integer of 0 or more and 2 or less; indicates.)
[Claim 8]
The xylylene diisocyanate composition according to claim 7, wherein the content of the compound exceeds 100 ppm.
[Claim 9]
The oxygen content of claim 7, wherein the content of the compound is 10 ppm or moreA rylene diisocyanate composition.
[Claim 10]
The xyloxy according to any one of claims 7 to 9, wherein the compound comprises a formyl group-containing isocyanate represented by the following chemical formula (2) and/or an ethyl group-containing isocyanate represented by the following chemical formula (3). A diisocyanate composition.
[Chemical 2]

[Chemical 3]

[Claim 11]
The xylylene diisocyanate composition according to any one of claims 1 to 10, further comprising chloromethylbenzyl isocyanate and having a content of 0.2 ppm or more and 3000 ppm or less.
[Claim 12]
A modified composition obtained by modifying the xylylene diisocyanate composition according to any one of claims 1 to 11,
A modified xylylene diisocyanate composition containing at least one of the following functional groups (a) to (i).
(a) an isocyanurate group,
(b) an allophanate group,
(c) a biuret group,
(d) a urethane group,
(e) a urea group,
(f) an iminooxadiazinedione group,
(g) a uretdione group,
(h) a uretonimine group,
(i) a carbodiimide group
[Claim 13]
An isocyanate component containing the xylylene diisocyanate composition according to any one of claims 1 to 11 and/or the modified xylylene diisocyanate composition according to claim 12,
A polymerizable composition containing an active hydrogen group-containing component.
[Claim 14]
A resin that is a cured product of the polymerizable composition according to claim 13.
[Claim 15]
A molded article containing the resin according to claim 14.
[Claim 16]
An optical element comprising the molded article according to claim 15.
[Claim 17]
A lens comprising the optical element according to claim 16.