Isocyanate composition, and non-foam resin and optical lens comprising same

Abstract

The present invention relates to an isocyanate composition and, more specifically, to: an isocyanate composition which enables a resin containing a diisocyanate compound to exhibit excellent mechanical properties and thermal properties simultaneously, exhibit excellent optical properties (refractive index and Abbe number), have an appropriate viscosity increase rate, prevent the occurrence of flow marks, exhibit low haze, and have a low water absorption rate, thereby having the effects of preventing shape deformation and delamination of a coating film when applied to an optical lens; and a non-foam resin and an optical lens comprising the isocyanate composition.

Description

Isocyanate composition, non-foam resin containing the same, and optical lens

[0001] The present invention relates to an isocyanate composition, and more specifically, to an isocyanate composition, a non-foam resin containing the same, and an optical lens.

[0002] Isocyanate compounds serve as raw materials for polyurethanes and are widely used in coatings, adhesives, paints, foams, and optical materials. For polyurethanes used in fields requiring excellent appearance properties, particularly in optical applications where transparency is required, minimal discoloration is necessary. To achieve this, it is crucial not only that the polyurethane reaction does not cause discoloration, but also that the isocyanate compounds themselves—specifically, polyvalent isocyanate compounds with difunctionality or higher—do not undergo discoloration.

[0003] However, because isocyanate compounds are highly reactive, they are prone to oxidation by oxygen in the air or deterioration and discoloration due to the formation of self-polymers during storage, and there have been problems with discoloration or cloudiness occurring in optical products such as urethane lenses to which they are applied.

[0004] In response to this, various methods have been researched and proposed to inhibit discoloration in isocyanate compounds and products manufactured using them, such as sealing with nitrogen gas to block air and refrigerating, or storing with additives like UV absorbers.

[0005] However, when isocyanate compounds are moved from their storage location to the atmosphere for use, the isocyanate compounds may discolor or become cloudy depending on changes in atmospheric moisture content or temperature. If isocyanate compounds that have discolored or become cloudy are used to manufacture optical lenses, there is a problem of reduced clarity and degraded quality, and it is also difficult to ensure the long-term storage stability of the isocyanate compounds.

[0006] Furthermore, even if discoloration or cloudiness of isocyanate compounds is prevented and long-term storage stability is ensured, there were problems such as a decrease in the mechanical strength and thermal properties of resins manufactured containing isocyanate compounds, a decline in optical properties (refractive index and Abbe number), an excessively fast or slow rate of viscosity increase, the occurrence of maceration and increased haze, and a high water absorption rate that accelerated shape deformation and coating film detachment when applied to optical lenses.

[0007] The present invention has been devised to overcome the aforementioned problems and aims to provide an isocyanate composition that, by including a specific amount of an isomer of a predetermined diisocyanate compound, simultaneously exhibits excellent mechanical and thermal properties of a resin containing the isocyanate composition, exhibits excellent optical properties, has an appropriate viscosity increase rate, can prevent the occurrence of pulverization, has low haze, and has a low water absorption rate, thereby preventing shape deformation and detachment of the coating film when applied to an optical lens; a non-foam resin containing the same; and an optical lens manufactured using the same.

[0008] To solve the above-mentioned problem, the present invention provides an isocyanate composition comprising meta-xylylene diisocyanate, ortho-xylylene diisocyanate 5 to 1000 ppm, and para-xylylene diisocyanate 1000 to 5000 ppm.

[0009] According to one embodiment of the present invention, the ortho-xylylene diisocyanate may be included in an amount of 0.2 to 16 parts by weight per 100 parts by weight of the para-xylylene diisocyanate.

[0010] In addition, the content deviation of the ortho-xylylene diisocyanate and the para-xylylene diisocyanate may be 300 ppm or more.

[0011] In addition, the above ortho-xylylene diisocyanate may be included in an amount of 7 to 500 ppm.

[0012] In addition, the para-xylylene diisocyanate may be included in an amount of 2000 to 4000 ppm.

[0013] In addition, the meta-xylylene diisocyanate may be included in an amount of 99.00 to 99.90 weight% of the total weight of the isocyanate composition.

[0014]

[0015] In addition, the present invention provides a non-foam resin synthesized using the isocyanate composition described above.

[0016] According to one embodiment of the present invention, the non-foam resin may be any one of a coating resin, an adhesive resin, a sealant resin, and an elastomer resin.

[0017]

[0018] In addition, the present invention provides an optical lens comprising the above-described non-foam resin.

[0019] The isocyanate composition of the present invention, the non-foam resin containing the same, and the optical lens can simultaneously exhibit excellent mechanical and thermal properties of the resin containing the isocyanate composition, exhibit excellent optical properties, have an appropriate viscosity increase rate, prevent pulse formation, have low haze, and have a low water absorption rate, thereby having the effect of preventing shape deformation and detachment of the coating film when applied to an optical lens.

[0020] The present invention will be described in more detail below.

[0021] Various methods have been studied and proposed to suppress discoloration in existing isocyanate compounds and products manufactured using them, such as sealing with nitrogen gas to block air and refrigerating, or storing with additives such as UV absorbers. However, when isocyanate compounds are moved from their storage location to an atmospheric environment for use, discoloration or cloudiness may occur depending on the moisture content or temperature changes in the air during this process. Furthermore, if optical lenses or the like are manufactured using discolored or cloudy isocyanate compounds, there is a problem of quality degradation due to reduced clarity, and it is also difficult to ensure the long-term storage stability of isocyanate compounds.

[0022] Furthermore, even if discoloration or cloudiness of isocyanate compounds is prevented and long-term storage stability is ensured, there were problems such as a decrease in the mechanical strength and thermal properties of resins manufactured containing isocyanate compounds, a decline in optical properties (refractive index and Abbe number), an excessively fast or slow rate of viscosity increase, the occurrence of maceration and increased haze, and a high water absorption rate that accelerated shape deformation and coating film detachment when applied to optical lenses.

[0023] The present invention sought to solve the aforementioned problem through an isocyanate composition comprising meta-xylylene diisocyanate, ortho-xylylene diisocyanate, and para-xylylene diisocyanate, wherein the para-xylylene diisocyanate is contained in an amount of 10,000 ppm or less.

[0024] Accordingly, excellent effects can be simultaneously exhibited regarding the mechanical and thermal properties of a resin containing an isocyanate compound, excellent optical properties, an appropriate viscosity increase rate, prevention of pulse formation, low haze, and low water absorption rate, thereby enabling the prevention of shape deformation and coating film detachment when applied to optical lenses.

[0025]

[0026] The isocyanate composition according to the present invention is implemented to include meta-xylylene diisocyanate, ortho-xylylene diisocyanate 5 to 1000 ppm, and para-xylylene diisocyanate 1000 to 5000 ppm as described above.

[0027] At this time, the ortho-xylylene diisocyanate may be included in the isocyanate composition at a concentration of 5 to 1000 ppm, preferably at 7 to 500 ppm, and more preferably at 10 to 50 ppm. If the ortho-xylylene diisocyanate is included in the isocyanate composition at a concentration of less than 5 ppm, there may be problems such as increased moisture absorption rate when the resin is applied, which accelerates shape deformation and the detachment of the coating film when applied to an optical lens, and if it is included at a concentration exceeding 1000 ppm, there may be problems such as increased haze when the resin is applied.

[0028] In addition, the para-xylylene diisocyanate may be included in the isocyanate composition at a concentration of 1,000 to 5,000 ppm, preferably at a concentration of 2,000 to 4,000 ppm, and more preferably at a concentration of 2,400 to 3,500 ppm. If the para-xylylene diisocyanate is included in the isocyanate composition at a concentration of less than 1,000 ppm, the viscosity increase rate of the composition may be excessively slow, and there may be a problem of increased haze during resin polymerization and increased haze during resin application. If the concentration exceeds 5,000 ppm, the viscosity increase rate of the composition may be excessively fast, which may reduce workability and increase haze during resin application.

[0029] The above ortho-xylylene diisocyanate and para-xylylene diisocyanate may be included in a predetermined amount derived from ortho-xylylene diamine and para-xylylene diamine among xylylene diamine (XDA) used to prepare a precursor of xylylene diisocyanate, or may be included in a predetermined amount as by-products and / or compounds generated during the synthesis process of diisocyanate compounds, or may be included in a predetermined amount by controlling the content through a predetermined purification process, or may be included in a predetermined amount by adding ortho-xylylene diisocyanate and para-xylylene diisocyanate.

[0030] At this time, the content of the ortho-xylylene diisocyanate may be less than the content of the para-xylylene diisocyanate. If the content of the ortho-xylylene diisocyanate is equal to or greater than the content of the para-xylylene diisocyanate, the yellowness of the manufactured resin may increase, which may lead to a problem of deterioration in the quality of the optical resin.

[0031] In addition, the ortho-xylylene diisocyanate may be included in an amount of 0.2 to 16 parts by weight per 100 parts by weight of the para-xylylene diisocyanate, preferably 0.21 to 13 parts by weight, more preferably 0.21 to 3 parts by weight, and even more preferably 0.28 to 2.1 parts by weight per 100 parts by weight of the para-xylylene diisocyanate. As the para-xylylene diisocyanate and the ortho-xylylene diisocyanate satisfy the above content relationship, it may be more advantageous for achieving the objective of the present invention.

[0032] In addition, the content variation of the ortho-xylylene diisocyanate and the para-xylylene diisocyanate may be 300 ppm or more, preferably 500 ppm or more, more preferably 1000 ppm or more, and even more preferably 2000 ppm or more. If the content variation of the ortho-xylylene diisocyanate and the para-xylylene diisocyanate is less than 300 ppm, there may be a problem where polymerization occurs unevenly during resin polymerization, causing macling, or where haze increases during resin application.

[0033] Meanwhile, the meta-xylylene diisocyanate may be included in an amount of 99.00 to 99.90 weight% of the total weight of the isocyanate composition according to the present invention, preferably 99.30 to 99.70 weight%. If the meta-xylylene diisocyanate is less than 99.00 weight% of the total weight of the isocyanate composition, the purity decreases, which may cause problems such as reduced transparency of the resin and increased water absorption, which accelerate shape deformation and detachment of the coating film when applied to an optical lens; if it exceeds 99.90 weight%, the rate of viscosity increase is low, which may cause maceration / haze.

[0034]

[0035] According to one embodiment of the present invention, the isocyanate composition may further include one or more isocyanate compounds selected from the group consisting of 1,4-tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,3-cyclohexylene diisocyanate, 1,4-cyclohexylene diisocyanate, isophorone diisocyanate, norbornene diisocyanate, methylene diphenyl diisocyanate, methylene dicyclohexyl isocyanate, and toluene diisocyanate, but is not limited thereto.

[0036]

[0037] Meanwhile, the isocyanate composition of the present invention may be prepared by the following manufacturing method, but is not limited thereto.

[0038] The isocyanate compound of the above isocyanate composition can be synthesized by reacting an amine compound in a solvent with phosgene.

[0039] The solvents used in the above phosgenation reaction may include aromatic hydrocarbon solvents such as benzene, toluene, xylene, and ethylbenzene; chlorinated aromatic hydrocarbon solvents such as monochlorobenzene, 1,2-dichlorobenzene, and 1,4-dichlorobenzene; and chlorinated hydrocarbon solvents such as dichloromethane, chloroform, and carbon tetrachloride, and two or more of these may be mixed and used.

[0040] The amine compound used in the above phosgenation reaction may be, for example, an amine compound obtained by hydrogenating a nitro compound or a chloride thereof. Specifically, the amine compound may include one or more of meta-xylylene diamine, ortho-xylylene diamine, and para-xylylene diamine, or may include all of meta-xylylene diamine, ortho-xylylene diamine, and para-xylylene diamine. Additionally, the amine compound may further include one or more selected from the group consisting of 1,4-tetramethylene diamine, 1,5-pentamethylene diamine, 1,6-hexamethylene diamine, 1,3-cyclohexylene diamine, 1,4-cyclohexylene diamine, isophorone diamine, diamine, methylene diphenyl diamine, methylene dicyclohexyl diamine, toluene diamine, and salts thereof.

[0041] The above amine compound may be included in an amount of 1 to 20 parts by weight per 100 parts by weight of solvent. If the content of the amine compound exceeds 20 parts by weight, there is a risk that a large amount of amine compound may precipitate. Preferably, it may be included in an amount of 1 to 15 parts by weight or 3 to 10 parts by weight.

[0042] Meanwhile, the above phosgenation reaction can be carried out by a direct phosgenation method in which an amine compound is directly reacted with phosgene (Method 1); a method in which an amine compound is reacted with anhydrous hydrochloric acid to form an amine-hydrochloride compound, and then the formed salt is reacted with phosgene (Method 2); or a method in which an amine compound is reacted with carbonic acid to form an aliphatic amine-carbonate compound, and then the formed salt is reacted with phosgene (Method 3).

[0043] The direct phosgenation method of Method 1 above can be carried out by reacting an amine compound with phosgene in the organic solvent. At this time, the phosgene may be added in a lump sum at the beginning of the reaction, or a portion may be added at the beginning of the reaction, and the remainder may be added in portions during the reaction.

[0044] Meanwhile, the above method 1 may be carried out by a first step of dissolving a portion of phosgene in the solvent and then adding the amine compound; and a second step of adding the remaining phosgene after the addition of the amine compound is completed and reacting. At this time, the first step is preferably carried out at a temperature of -15°C to -10°C to prevent leakage of highly toxic phosgene and to prevent rapid exothermic reaction when the amine compound is added, and the phosgeneization reaction in the second step may be controlled to 120°C to 140°C so that the reaction can occur at an appropriate reaction rate without concern for decomposition of the amine compound.

[0045] In the case of Method 2 above, the process can be carried out by reacting an amine compound with hydrochloric acid in an organic solvent to form an amine-hydrochloride compound, and then adding phosgene to react. The formation of the amine-hydrochloride compound can be carried out at a temperature of 30°C or lower, preferably about 23±5°C, and the reaction after the addition of phosgene can be controlled to 120°C to 140°C. When carried out under such temperature conditions, the solubility of the amine-hydrochloride compound is increased and thermal decomposition of the isocyanate is prevented, thereby enabling the production of a high-purity isocyanate compound in high yield.

[0046] In the case of Method 3 above, the process can be carried out by reacting an amine compound with carbonic acid in a solvent to form an amine-carbonate compound, and then adding phosgene to react. At this time, the formation of the amine-carbonate compound can be carried out at a temperature of 30°C or lower, preferably about 23±5°C, and the reaction after the addition of phosgene can be controlled to a temperature of 80°C to 180°C. Preferably, the temperature may be in the range of 100°C or higher, or 120°C or higher, and 150°C or lower, or 140°C or lower. When carried out under such temperature conditions, the solubility of the amine-carbonate compound is increased and thermal decomposition of the isocyanate is prevented, thereby enabling the production of a high-purity isocyanate compound in a high yield.

[0047] After the reaction with phosgene is completed according to each method, a removal process such as nitrogen bubbling and a solvent removal process such as distillation for unreacted phosgene and hydrogen chloride gas may be optionally further performed, and these processes may be carried out according to conventional methods.

[0048]

[0049] In addition, the present invention provides a non-foam resin synthesized using the isocyanate composition described above.

[0050] The non-foam resin of the present invention is a resin that does not have the shape of a foam and can be used for coatings, adhesives, sealants, or elastomers, but is not limited thereto.

[0051] For example, the non-foam resin of the present invention may be a raw material used in the manufacture of automobiles, ships, flexible packaging, food packaging, construction, paints, inks, solar cells, microcapsules, adhesives for displays, optical materials, and fuel cells, but is not limited thereto.

[0052] Meanwhile, the non-foam resin of the present invention may be a reaction product of the isocyanate composition of the present invention and an active hydrogen group-containing component. The active hydrogen group-containing component may include a polyol component (a component mainly containing a polyol having two or more hydroxyl groups), a polythiol component (a component mainly containing a polythiol having two or more mercapto groups (thiol groups)), a polyamine component (a compound mainly containing a polyamine having two or more amino groups), etc. As a preferred example of an active hydrogen group-containing component, it may be a raw material required to manufacture a polyurethane resin.

[0053]

[0054] In addition, as the above-described non-foam resin can be used as a transparent optical material, the present invention provides an optical lens comprising the above-described non-foam resin.

[0055] The present invention will be explained in more detail below through examples, but the following examples are not intended to limit the scope of the invention and should be interpreted as being for the purpose of aiding understanding of the invention.

[0056] [Example]

[0057] <Example 1: Preparation of Isocyanate Composition>

[0058] 471 g of 1,2-dichlorobenzene, 46.77 g of m-XDA (m-xylenediamine), 1.31 mg of o-XDA (ortho-xylenediamine), and 130.95 mg of p-XDA (para-xylenediamine) were placed in a flask and stirred while adding anhydrous hydrochloric acid at room temperature (23±5℃). As anhydrous hydrochloric acid was added, the temperature rose to 50℃, at which point the total amount added was 100 g.

[0059] The formed salt was cooled to room temperature, and 72 g of phosgene was introduced into the reactor, after which the reactor temperature was heated to 130°C. From the time of phosgene introduction until the end of the reaction, a dry ice-acetone cooler was used to prevent phosgene from leaking out. After the reactor temperature reached 130°C, an additional 29 g of phosgene was added, and the reaction solution was stirred for 2 hours until it became transparent. During this time, the reactor temperature was maintained so as not to exceed 135°C. After the solution became transparent, the inside of the reactor was cooled to 80°C and cooled while blowing in nitrogen. The reaction solution from which phosgene had been removed was purified by vacuum distillation to obtain an isocyanate composition containing meta-xylylene diisocyanate, ortho-xylylene diisocyanate, and para-xylylene diisocyanate.

[0060] The meta-xylylene diisocyanate was included in the isocyanate composition at 99.22% by weight of the total weight, the ortho-xylylene diisocyanate at 28 ppm, and the para-xylylene diisocyanate at 2800 ppm.

[0061]

[0062] <Examples 2–10 and Comparative Examples 1–4>

[0063] Isocyanate compositions as shown in Tables 1 to 3 were prepared by preparing an isocyanate composition in the same manner as in Example 1 above, but with different amounts of meta-xylylene diisocyanate, ortho-xylylene diisocyanate, and para-xylylene diisocyanate.

[0064]

[0065] <Experimental Example>

[0066] For each isocyanate composition according to Examples 1 to 10 and Comparative Examples 1 to 4, 62.4 g of the isocyanate composition, 0.16 g of ZELEC® UN (Stepan) as an internal release agent, and 0.80 g of Tinuvin® 329 (BASF) as a UV absorber were stirred and mixed at room temperature (23~25℃) for 20 minutes to prepare a mixture, 0.024 g of DBTC (dibutyltin dichloride) was added to the prepared mixture and stirred for 10 minutes, 57.6 g of 2,3-bis(2-sulfanyl ethyl sulfanyl)propane-1-thiol was added, and the mixture was stirred for 1 hour while degassing under a pressure of 5 mbar to prepare a polyisocyanate polymerization composition. The prepared polyisocyanate polymerization composition was filtered using a 1 μm PTFE filter and then injected into a mold consisting of a glass mold and a tape, respectively. Subsequently, the mold was placed in an oven, and a polymerization reaction was carried out for 20 hours while gradually increasing the temperature from 10°C to 120°C to synthesize a non-foam resin. After the polymerization was completed, the mold was removed from the oven and released to obtain the respective plastic resins. The obtained resins were annealed at 120°C for 6 hours to produce resins with a thickness of 9 mm. Subsequently, the following physical properties were evaluated and are shown in Tables 1 to 3.

[0067] 1. Measurement of moisture absorption rate

[0068] For each non-foam resin prepared with the isocyanate composition according to the above examples and comparative examples, the moisture absorption rate (ppm, moisture content per 1g of resin) was measured by calculating the difference in weight change before and after the test by leaving a 3mm thick optical resin, which had been pre-treated with drying at 50°C for 24 hours according to ASTM D570, in purified water at 25°C for 24 hours and then removing the moisture.

[0069] 2. Haze Measurement

[0070] For each non-foam resin prepared with the isocyanate composition according to the above examples and comparative examples, haze was measured by visual observation. If no turbidity was visible to the naked eye, it was indicated as clear; if fine, as Slightly Haze (SH); and if severe, as Haze.

[0071] 3. Evaluation of Macleiness Occurrence

[0072] For each non-foam resin prepared with the isocyanate composition according to the above examples and comparative examples, the occurrence of pulses was evaluated through visual observation. O was used to indicate that no pulses occurred (good), and X was used to indicate that pulses occurred.

[0073] 4. Evaluation of Viscosity Increase Rate

[0074] For each non-foam resin prepared with the isocyanate composition according to the above examples and comparative examples, the viscosity increase rate was calculated for the initial viscosity of the polymerization composition described in the above experimental example measured with a LAMY RHEOLOGY RM 200 and the viscosity value after storage at 10 degrees for 10 hours.

[0075] 5. Evaluation of Yellowness (YI)

[0076] For each non-foam resin prepared with the isocyanate composition according to the above examples and comparative examples, the yellowness was measured using HunterLab’s Ultrascan Pro.

[0077] Classification Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 o-XDI (ppm) 286 10 50 450 750 p-XDI (ppm) 2800 2800 2800 2800 3500 4800 Relationship between o-XDI and p-XDI o < po < po < po < po < po < pp-XDI Per 100 parts by weight o-XDI (parts by weight) 10.21 40.35 71.78 612.85 715.625 Content variation of o-XDI and p-XDI (ppm) 277 2279 42790 2750 3050 4050 Moisture absorption rate (ppm) 554 841 699 4622 31214 Haze Clear Clear Clear Clear Clear Clear Mac Occurrence OOOOOO Viscosity Increase Rate (Times) 3.1 3.0 3.1 3.1 3.2 3.3 Yellowness (YI) 2.5 6 2.5 2.5 3 2.5 8 2.6 4 2.78

[0078] Classification Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 o-XDI (ppm) 28 28 28 28 65 10 p-XDI (ppm) 15 00 24 00 35 00 45 00 48 00 19 00 Relationship between o-XDI and p-XDI o < po < po < po < po < po < po < pp-XDI Per 100 parts by weight o-XDI (parts by weight) 1.8 66 66 71.1 66 66 70.8 0.6 22 222 0.1 25 26.8 42 Content variation of o-XDI and p-XDI (ppm) 14 7 22 37 234 7 244 7 247 94 1390 Moisture absorption rate (ppm) 5 19 52 95 66 574 793 215 Haze Clear Clear Clear Clear Clear Clear Clear Mac Occurrence OOOOOO Viscosity Increase Rate (Times) 2.7 3.0 3.2 4.2 4.5 2.7 Yellowness (YI) 2.5 1 2.5 6 2.5 4 2.5 4 2.4 9 2.71

[0079] Classification Example 1 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 o-XDI (ppm) 900 31 200 28 28 1200 p-XDI (ppm) 11 00 1200 48 00 800 55 00 800 Relationship between o-XDI and p-XDI o < po < po < po < po < po > pp Per 100 parts by weight of p-XDI o-XDI (parts by weight) 81.8 180.25 253.5 0.5 150 Content deviation of o-XDI and p-XDI (ppm) 200 119 736 00 77 254 72400 Moisture absorption rate (ppm) 208 106 71 875 155 77 195 Haze SH Clear Haze S H Haze Macley Viscosity Increase Rate (times) 2.6 2.9 5.5 2.3 7.4 2.4 Yellowness (YI) 2.8 2.5 13.0 2.5 5 2.5 6 3.12

[0080] As can be seen from Tables 1 to 3 above,

[0081] It can be confirmed that Examples 1 to 10, which satisfy all of the following: the content of meta-xylylene diisocyanate according to the present invention, the relationship between ortho-xylylene diisocyanate and para-xylylene diisocyanate, the relationship between parts by weight, the deviation in content, and the respective contents, have a lower water absorption rate compared to Examples 11 to 13 and Comparative Examples 1 to 5, which do not satisfy at least one of these, so that when applied to an optical lens, shape deformation and detachment of the coating film can be prevented, haze is low, pulse occurrence can be prevented, and the viscosity increase rate is appropriate, all of which effects can be simultaneously exhibited.

[0082] Meanwhile, in the case of Comparative Example 5, it was confirmed that optical non-uniformity occurred as the color index (yellowness-YI) increased.

[0083]

[0084] Specific embodiments have been illustrated and described above. However, the invention is not limited to the aforementioned embodiments, and those skilled in the art may make various modifications without departing from the essence of the technical concept of the invention as described in the following claims.

Claims

1. meta-xylylene diisocyanate; Ortho-xylylene diisocyanate 5 ~ 1000 ppm; and An isocyanate composition comprising 1,000 to 5,000 ppm of para-xylylene diisocyanate.

2. In Paragraph 1, An isocyanate composition comprising 0.2 to 16 parts by weight of the ortho-xylylene diisocyanate per 100 parts by weight of the para-xylylene diisocyanate.

3. In Paragraph 1, An isocyanate composition having a content deviation of ortho-xylylene diisocyanate and para-xylylene diisocyanate of 300 ppm or more.

4. In Paragraph 1, An isocyanate composition containing the above ortho-xylylene diisocyanate in an amount of 7 to 500 ppm.

5. In Paragraph 1, An isocyanate composition containing the above para-xylylene diisocyanate at a concentration of 2000 to 4000 ppm.

6. In Paragraph 1, The meta-xylylene diisocyanate is included in an isocyanate composition comprising 99.00 to 99.90 weight percent of the total weight of the isocyanate composition.

7. A non-foam resin synthesized using an isocyanate composition according to any one of claims 1 to 6.

8. In Paragraph 7, The above non-foam resin is a non-foam resin that is any one of a coating resin, an adhesive resin, a sealant resin, and an elastomer resin.

9. An optical lens comprising a non-form resin according to claim 7.