A method for forming a resin lens

Abstract

The present invention belongs to the technical field of lens, and particularly relates to a molding method of resin lens. The specific steps are as follows: (1) Pretreat the raw materials to obtain a mixture; (2) Pour the pretreated mixture into a mold, close the mold, and wind a tape around for one week. After the mold is sealed, the remaining length of the tape should be between 1 - 3 cm; (3) Carry out curing treatment, and control the temperature change rate within 20 °C before and after the gel point temperature of the mixture at 3 - 7 °C / h. This molding method can reduce the material inclination caused by uneven adhesive force of the tape around the mold by controlling the remaining length of the tape. At the same time, under a specific curing program, the gel time of the system can be matched with the curing temperature, and the lens eccentricity will not be caused by excessive temperature difference before and after the gel point, which intensifies the material convection or uneven system shrinkage. The eccentricity problem of the product is effectively solved, and the yield of the present invention is above 98%.

Description

Technical Field

[0001] The present invention belongs to the technical field of lenses, and particularly relates to a method for forming a resin lens. Technical Background

[0002] Entering the 21st century, with the popularization of electronic products, more and more people wear glasses, and the age group of wearers is getting younger and younger. Wearing glasses has become an essential part of life. As the main part of glasses, the accuracy of the lens power will affect the comfort of people wearing glasses.

[0003] During the preparation process of the lens, it needs to go through processes such as primary curing and forming, edge cutting, cleaning, and secondary curing. During the reaction and shaping stage from low temperature to high temperature, the phenomenon that the optical axis deviates from the geometric central axis will occur, which is called eccentricity. After the lens shows eccentricity, it will cause a deviation in the central power of the lens, resulting in a serious uncomfortable experience for the wearer, and even seriously harming the wearer's eyes. Therefore, it will be treated as a defective product, affecting the yield rate of the lens. There is no good solution to solve the eccentricity problem in the prior art. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method for forming a resin lens. By controlling the length of the tape margin, this forming method can reduce the tilt of the material caused by uneven adhesive force of the tape around the mold. At the same time, under a specific curing program, the gel time of the system can be matched with the curing temperature, and the eccentricity of the lens will not be aggravated due to excessive temperature difference before and after the gel point, resulting in uneven material convection or uneven system shrinkage. The eccentricity problem of the product is effectively solved.

[0005] The technical solution of the present invention is as follows:

[0006] A method for forming a resin lens, the specific steps are as follows:

[0007] (1) Pretreat the raw materials to obtain a mixture;

[0008] (2) Pour the pretreated mixture into a mold, close the mold, and wind the tape around for one week to seal the mold. The length of the tape margin should be between 1 - 3 cm;

[0009] (3) Carry out curing treatment, and control the temperature change rate within 20 °C before and after the gel point temperature of the mixture to be 3 - 7 °C / h.

[0010] Preferably, by weight, the raw materials include: 5 - 25 parts of a polythiol compound, 3 - 25 parts of a polyisocyanate compound, and 50 - 92 parts of a cyclic sulfur compound.

[0011] Further preferably, the episulfide compound is one or more of bis(β-epithiopropyl) disulfide, bis(β-epithiopropylthio)methane, 1,2-bis(β-epithiopropylthio)ethane, 1,3-bis(β-epithiopropylthio)propane, 1,4-bis(β-epithiopropylthio)butane, bis(β-epithiopropyl) sulfide, bis(β-epithiopropylthioethyl) sulfide, 1,3-bis(β-epithiopropylthio)cyclohexane, 1,4-bis(β-epithiopropylthio)cyclohexane, 1,3-bis(β-epithiopropylthiomethyl)cyclohexane, and 1,4-bis(β-epithiopropylthiomethyl)cyclohexane.

[0012] Further preferably, the polythiol compound is one or more of thiodiglycol mercaptan, 2,3-dithio(2-mercapto)-1-propanethiol, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, tetrakis(mercaptomethyl)methane, pentaerythritol tetra-(3-mercaptopropionate), 2,5-dimercaptomethyl-1,4-dithiane, pentaerythritol tri-(3-mercaptopropionate), 1,1,2,2-tetra-(mercaptomethylthio)ethane, hexakis(3-mercaptopropionate) dipentaerythritol ester, and pentaerythritol tetra-(3-mercaptobutyrate).

[0013] Further preferably, the polyisocyanate compound is one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, m-xylylene diisocyanate, p-xylylene diisocyanate, m-tetramethylxylylene diisocyanate, p-tetramethylxylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, 1,4-bis(isocyanatomethyl)cyclohexane, and bis(isocyanatomethyl)norbornene.

[0014] Preferably, the raw material further includes a catalyst. Further preferably, the addition amount of the catalyst is 0.01-0.1% of the weight of the composition. Specifically preferably, the catalyst is tetrabutylphosphonium bromide.

[0015] After the tape of the present invention wraps around the mold for one week to achieve mold sealing, the remaining length of the tape should be between 1 - 3 cm, which can reduce the material inclination caused by uneven adhesive force of the tape around the mold. If the remaining length of the tape is too short, it is difficult to operate during the casting process, affecting work efficiency, and prone to material leakage, resulting in eccentricity and reducing the finished product rate of the lens; if the remaining length of the tape is too long, since one side is double-layer tape and the other side is single-layer tape, the stress on the mold caused by tape winding is uneven, and the stress generated during the curing and shrinkage of the lens will be unevenly distributed in the mold, further affecting the flow direction of the material, and thus eccentricity will occur after curing. The temperature change rate within 20°C before and after the gel point temperature of the mixture is controlled at 3 - 7°C / h, maintaining the range of 20°C before and after the gel point. The setting of this range is mainly to ensure a certain temperature control near the gel point, which can better control the reaction process of the material, achieve the matching of the gel time and curing temperature of the system, and will not exacerbate material convection or uneven system shrinkage due to too large a temperature difference before and after the gel point, resulting in lens eccentricity. If the reaction rate is too fast, rapid agglomeration and heat release between materials will occur, and relative to the convective fluctuations of the materials caused by the heat transfer time difference inside the system, resulting in the generation of the finished product eccentricity problem. At the same time, it may also lead to the problem that some functional groups inside the system are not fully reacted, resulting in a decrease in the Tg of the product; if the reaction rate is too slow, considering production efficiency, the subsequent high-temperature section time will be correspondingly shortened, prone to the problem of chip explosion, affecting the Tg and curing degree of the product, and also affecting the eccentricity problem of the product. If the range before and after the gel point temperature is too small, when near the gel point, the short time will result in rapid curing, which is not conducive to the uniform reaction of the material or causes uneven heat release, resulting in problems such as eccentricity and material streaks. At the same time, if the range is too small, the temperature in the low-temperature section is low, resulting in a decrease in the reaction degree of the system in the low-temperature section, correspondingly increasing the reaction ratio of the system in the high-temperature section, causing concentrated and intense heat release or stress generation in the system, prone to the problem of chip explosion, and also leading to the eccentricity of the product, affecting the finished product rate of the product; if the range before and after the gel point temperature is too large, it will increase the curing duration, increase the production cycle, affect production efficiency, increase production costs, and is not conducive to industrial production. Under a specific curing program, in combination with the remaining length of the tape, the present invention achieves the matching of the gel time and curing temperature of the system, and will not exacerbate material convection, uneven system shrinkage, or uneven adhesive force around the mold due to too large a temperature difference before and after the gel point, resulting in problems such as material inclination, eccentricity, material leakage, and chip explosion. Under the combined action of the specific remaining length of the tape and the specific temperature change rate of the gel point temperature of the present invention, the eccentricity problem of the lens is effectively solved, ensuring the finished product rate of the product.

[0016] A method for forming a resin lens provided by the present invention can reduce the material inclination caused by uneven adhesive force of the tape around the mold by controlling the tape length; at the same time, under a specific curing procedure, the gel time of the system can be matched with the curing temperature, and the lens eccentricity will not be caused by excessive temperature difference before and after the gel point, which intensifies the material convection or uneven system shrinkage. The eccentricity problem of the product is effectively solved. Under the combined action of the remaining length of a specific tape and the temperature change rate of a specific gel point temperature, the present invention effectively solves the eccentricity problem of the lens and ensures the product yield. The product yield of the present invention is above 98%. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the tape winding the mold in the present invention;

[0018] In the figure, 1 is the mold, 2 is the tape, and L represents the remaining length of the tape after winding around the mold for one week to achieve mold sealing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Hereinafter, the technical solutions in the embodiments will be described in detail, but the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0020] The following parts are by weight.

[0021] Test method for gel point: The pretreated mixture is filled in a 30 ml glass bottle and left standing under the curing program temperature conditions. Observe that the composition in the bottle is inverted or tilted more than 45°, and no liquid drops fall within 30 s. The gel temperature is recorded as the gel point of the system. The curing program is 20°C - 20°C for 4 h, 20°C - 55°C for 12 h, 55°C - 80°C for 3 h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h.

[0022] Example 1

[0023] A resin lens:

[0024] The raw materials include a composition and a catalyst, including 79 parts of bis(β - mercaptopropyl)sulfide, 8 parts of hexakis(3 - mercaptopropionic acid)dipentaerythritol ester, 13 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0025] Forming method: After the composition is fully mixed and homogenized, the catalyst is added, then vacuum degassing is carried out, and it is poured into the mold and cured through a program to obtain an optical material;

[0026] The remaining length of the tape after one round of tape winding to seal the mold: 1 cm, the gel point temperature is 35°C; Curing program: 20°C - 20°C for 4 h, 20°C - 55°C for 11.7 h, heating rate is 3°C / h, 55°C - 80°C for 3 h, heating rate 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h, cooling rate is 20°C / h.

[0027] Example 2

[0028] A resin lens:

[0029] The raw materials include a composition and a catalyst, among which 92 parts of bis(β - mercaptopropyl)sulfide, 5 parts of hexakis(3 - mercaptopropionic acid)dipentaerythritol ester, 3 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0030] The molding method is the same as that in Example 1;

[0031] The remaining length of the tape after one round of tape winding to seal the mold: 3 cm, the gel point temperature is 35°C;

[0032] Curing program: 20°C - 20°C for 4 h, 20°C - 55°C for 5 h, heating rate is 7°C / h, 55°C - 80°C for 3 h, heating rate 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h, cooling rate is 20°C / h.

[0033] Example 3

[0034] A resin lens:

[0035] The raw materials include a composition and a catalyst, among which 79 parts of bis(β - mercaptopropyl)sulfide, 8 parts of hexakis(3 - mercaptopropionic acid)dipentaerythritol ester, 13 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0036] The molding method is the same as that in Example 1;

[0037] The remaining length of the tape after one round of tape winding to seal the mold: 2.5 cm, the gel point temperature is 35°C;

[0038] Curing program: 20°C - 20°C for 4 h, 20°C - 55°C for 7 h, heating rate is 5°C / h, 55°C - 80°C for 3 h, heating rate 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h, cooling rate is 20°C / h.

[0039] Example 4

[0040] A resin lens:

[0041] The raw materials include a composition and a catalyst, among which there are 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0042] The molding method is the same as that in Example 1;

[0043] After the tape is wound around once to seal the mold, the remaining length of the tape is 2 cm, and the gel point temperature is 40 °C;

[0044] Curing procedure: 20 °C - 20 °C for 4 h, 20 °C - 65 °C for 7.5 h, heating rate is 6 °C / h, 65 °C - 80 °C for 1.81 h, heating rate is 8.3 °C / h, 80 - 80 °C for 2 h, 80 °C - 60 °C for 1 h, cooling rate is 20 °C / h.

[0045] Example 5

[0046] A resin lens:

[0047] The raw materials include a composition and a catalyst, among which there are 50 parts of bis(β - mercaptopropyl) sulfide, 25 parts of pentaerythritol tetra(3 - mercaptopropionate), 25 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0048] The molding method is the same as that in Example 1;

[0049] After the tape is wound around once to seal the mold, the remaining length of the tape is 1.5 cm, and the gel point temperature is 40 °C;

[0050] Curing procedure: 20 °C - 20 °C for 4 h, 20 °C - 65 °C for 7.5 h, heating rate is 6 °C / h, 65 °C - 80 °C for 1.81 h, heating rate is 8.3 °C / h, 80 - 80 °C for 2 h, 80 °C - 60 °C for 1 h, cooling rate is 20 °C / h.

[0051] Example 6

[0052] A resin lens:

[0053] The raw materials include a composition and a catalyst, among which there are 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of 1,3 - bis(isocyanatomethyl) cyclohexane, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0054] The molding method is the same as that in Example 1;

[0055] After the tape is wound around once to seal the mold, the remaining length of the tape is 1.5 cm, and the gel point temperature is 40 °C;

[0056] Curing procedure: 20°C - 20°C for 4 h, 20°C - 65°C for 7.5 h with a heating rate of 6°C / h, 65°C - 80°C for 1.81 h with a heating rate of 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h with a cooling rate of 20°C / h.

[0057] Comparative Example 1

[0058] A resin lens:

[0059] The raw materials include a composition and a catalyst, among which 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of 1,3 - bis(isocyanatomethyl) cyclohexane, and 0.07 parts of catalyst tetrabutylphosphonium bromide;

[0060] The molding method is the same as that in Example 1;

[0061] The remaining length of the tape after winding around the mold for one - week to achieve mold sealing: 0.8 cm, and the gel point temperature is 40°C;

[0062] Curing procedure: 20°C - 20°C for 4 h, 20°C - 65°C for 7.5 h with a heating rate of 6°C / h, 65°C - 80°C for 1.81 h with a heating rate of 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h with a cooling rate of 20°C / h.

[0063] Comparative Example 2

[0064] A molding method of a resin lens:

[0065] The raw materials include a composition and a catalyst, among which 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of 1,3 - bis(isocyanatomethyl) cyclohexane, and 0.07 parts of catalyst tetrabutylphosphonium bromide;

[0066] The molding method is the same as that in Example 1;

[0067] The remaining length of the tape after winding around the mold for one - week to achieve mold sealing: 3.5 cm, and the gel point temperature is 40°C;

[0068] Curing procedure: 20°C - 20°C for 4 h, 20°C - 65°C for 7.5 h with a heating rate of 6°C / h, 65°C - 80°C for 1.81 h with a heating rate of 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h with a cooling rate of 20°C / h.

[0069] Comparative Example 3

[0070] A molding method of a resin lens:

[0071] The raw materials include a composition and a catalyst, among which there are 79 parts of bis(β - mercaptopropyl)sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of 1,3 - bis(isocyanatomethyl)cyclohexane, and 0.07 part of the catalyst tetrabutylphosphonium bromide;

[0072] The molding method is the same as that in Example 1;

[0073] After the tape is wound around once to seal the mold, the remaining length of the tape is 2.6 cm, and the gel point temperature is 40°C; Curing procedure: 20°C - 20°C for 4 h, 20°C - 65°C for 16.07 h, heating rate 2.8°C / h, 65°C - 80°C for 1 h, heating rate 15°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h, cooling rate 20°C / h.

[0074] Comparative Example 4

[0075] A resin lens:

[0076] The raw materials include a composition and a catalyst, among which there are 79 parts of bis(β - mercaptopropyl)sulfide, 8 parts of pentaerythritol tetra(3 - mercaptopropionate), 13 parts of 1,3 - bis(isocyanatomethyl)cyclohexane, and 0.07 part of the catalyst tetrabutylphosphonium bromide;

[0077] The molding method is the same as that in Example 1;

[0078] After the tape is wound around once to seal the mold, the remaining length of the tape is 2.6 cm, and the gel point temperature is 40°C;

[0079] Curing procedure: 20°C - 20°C for 4 h, 20°C - 65°C for 5.6 h, heating rate 8°C / h, 65°C - 80°C for 1.81 h, heating rate 8.3°C / h, 80 - 80°C for 2 h, 80°C - 60°C for 1 h, cooling rate 20°C / h.

[0080] Comparative Example 5

[0081] A resin lens:

[0082] The raw materials include a composition and a catalyst, among which there are 79 parts of bis(β - mercaptopropyl)sulfide, 8 parts of dipentaerythritol hexakis(3 - mercaptopropionate), 13 parts of isophorone diisocyanate, and 0.07 part of the catalyst tetrabutylphosphonium bromide;

[0083] The molding method is the same as that in Example 1;

[0084] After the tape is wound around once to seal the mold, the remaining length of the tape is 3.5 cm, and the gel point temperature is 35°C;

[0085] Curing procedure: 4 h at 20°C - 20°C, 3.5 h at 20°C - 55°C with a heating rate of 10°C / h, 3 h at 55°C - 80°C with a heating rate of 8.3°C / h, 2 h at 80 - 80°C, 1 h at 80°C - 60°C with a cooling rate of 20°C / h.

[0086] Comparative Example 6

[0087] A resin lens:

[0088] The raw materials include a composition and a catalyst, among which 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of hexakis(3 - mercaptopropionic acid) dipentaerythritol ester, 13 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0089] The molding method is the same as that in Example 1;

[0090] The remaining length of the tape after winding around the mold for one week to achieve mold sealing: 0.6 cm, and the gel point temperature is 35°C;

[0091] Curing procedure: 4 h at 20°C - 20°C, 14 h at 20°C - 55°C with a heating rate of 2.5°C / h, 3 h at 55°C - 80°C with a heating rate of 8.3°C / h, 2 h at 80 - 80°C, 1 h at 80°C - 60°C with a cooling rate of 20°C / h.

[0092] Comparative Example 7

[0093] A resin lens:

[0094] The raw materials include a composition and a catalyst, among which 79 parts of bis(β - mercaptopropyl) sulfide, 8 parts of hexakis(3 - mercaptopropionic acid) dipentaerythritol ester, 13 parts of isophorone diisocyanate, and 0.07 part of catalyst tetrabutylphosphonium bromide;

[0095] The molding method is the same as that in Example 1;

[0096] The remaining length of the tape after winding around the mold for one week to achieve mold sealing: 2.5 cm, and the gel point temperature is 35°C; Curing procedure: 4 h at 20°C - 20°C, 6 h at 20°C - 50°C with a heating rate of 5°C / h, 3.61 h at 50°C - 80°C with a heating rate of 8.3°C / h, 2 h at 80 - 80°C, 1 h at 80°C - 60°C with a cooling rate of 20°C / h.

[0097] Test Example

[0098] Eccentricity test method: Pour 25 pieces each at 300°, 600°, 900°, and 1100° for the systems of the above-mentioned embodiments respectively. The diameter of the mold is 75 mm. Measure the maximum value a and the minimum value b of the edge thickness of the lens, and calculate the difference between the maximum value and the minimum value. If the difference of 95 pieces or more is < 0.05 mm, it is grade A; if the difference of 90 - 94 pieces is < 0.05 mm, it is grade B; if the difference of 80 - 89 pieces is < 0.05 mm, it is grade C; if the difference of 79 pieces or less is < 0.05 mm, it is unqualified and the eccentricity is serious. The specific test results are shown in the following table:

[0099]

[0100]

[0101] Through the above tests, the eccentricity tests of the products of Embodiments 1 - 6 of the present invention are grade A, and there is no abnormality in the casting condition. However, the eccentricity tests of the products of Comparative Examples 1 - 7 are grade B, grade C, and unqualified. Moreover, in some comparative examples, there is material leakage, the operation is difficult, and the material leakage will also affect the eccentricity. In Comparative Example 7, the temperature in the low - temperature section decreases, resulting in a decrease in the reaction degree of the system material in the low - temperature section. Correspondingly, the increase in the reaction ratio of the high - temperature section material will cause intense heat release or stress concentration, resulting in the problem of chip explosion (the chip explosion rate can reach more than 5%), reducing the product yield. The yield of the present invention is above 98%. The standard of the yield: the eccentricity difference < 0.05 mm, Tg ≥ 80°C, no chip explosion, no material leakage.

[0102] A molding method of a resin lens provided by the present invention can be applicable to existing - model molds in the prior art. Preferably, the diameter of the mold is 70 - 80 mm, and more preferably, 70 mm, 75 mm, 78 mm, 80 mm.

[0103] When preparing the lens by the present invention, the eccentricity condition is significantly improved, the optical power is accurate, greatly improving the yield of the optical material, and avoiding inaccurate optical power of the lens after eccentricity, which causes discomfort in wearing and even harm. A molding method of a resin lens provided by the present invention can reduce the tilt of the material caused by uneven adhesive force of the tape around the mold by controlling the tape length; at the same time, under a specific curing program, the gel time of the system can be matched with the curing temperature, and the eccentricity of the lens will not be caused by the excessive temperature difference before and after the gel point, which intensifies the material convection or uneven system shrinkage. The eccentricity problem of the product is effectively solved. Under the combined action of the remaining length of the specific tape and the temperature change rate of the specific gel point temperature, the eccentricity problem of the lens is effectively solved, ensuring the yield of the product. The yield of the present invention is above 98%.

Claims

1. A method for molding a resin lens, characterized in that The specific steps are as follows: (1) Pretreat the raw materials to obtain a mixture; (2) Pour the pretreated mixture into a mold, close the mold, and wind the tape around it for one week. After the mold is sealed, the remaining length of the tape should be between 1 - 3 cm; (3) Conduct a curing treatment, and control the temperature change rate within 20 °C before and after the gel point temperature of the mixture to be 3 - 7 °C / h.

2. The forming method of a resin lens according to claim 1, characterized in that, The raw materials, by weight, include: 5 - 25 parts of a polythiol compound, 3 - 25 parts of a polyisocyanate compound, and 50 - 92 parts of a cyclic sulfur compound.

3. A method for molding a resin lens according to claim 2, characterized in that, The cyclic sulfur compound is one or more of bis(β - mercaptopropyl) disulfide, bis(β - mercaptopropylthio) methane, 1,2 - bis(β - mercaptopropylthio) ethane, 1,3 - bis(β - mercaptopropylthio) propane, 1,4 - bis(β - mercaptopropylthio) butane, bis(β - mercaptopropyl) sulfide, bis(β - mercaptopropylthioethyl) sulfide, 1,3 - bis(β - mercaptopropylthio) cyclohexane, 1,4 - bis(β - mercaptopropylthio) cyclohexane, 1,3 - bis(β - mercaptopropylthiomethyl) cyclohexane, and 1,4 - bis(β - mercaptopropylthiomethyl) cyclohexane.

4. A method for forming a resin lens according to claim 2, characterized in that, The polythiol compound is one or more of thiodiglycol mercaptan, 2,3 - dithio(2 - mercapto) - 1 - propane thiol, 4,8 - dimercaptomethyl - 1,11 - dimercapto - 3,6,9 - trithiaundecane, 4 - mercaptomethyl - 1,8 - dimercapto - 3,6 - dithiaoctane, tetrakis(mercaptomethyl) methane, pentaerythritol tetra - (3 - mercaptopropionate), 2,5 - dimercaptomethyl - 1,4 - dithiane, pentaerythritol tri - (3 - mercaptopropionate), 1,1,2,2 - tetra - (mercaptomethylthio) ethane, hexakis(3 - mercaptopropionate) dipentaerythritol, and pentaerythritol tetra - (3 - mercaptobutyrate).

5. The forming method of a resin lens according to claim 2, wherein, The polyisocyanate compound is one or more of isophorone diisocyanate, toluene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, m - xylylene diisocyanate, p - xylylene diisocyanate, m - tetramethylxylylene diisocyanate, p - tetramethylxylylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, 1,3 - bis(isocyanatomethyl) cyclohexane, 1,4 - bis(isocyanatomethyl) cyclohexane, and bis(isocyanatomethyl) norbornene.

6. The forming method of a resin lens according to claim 1, characterized in that, The raw materials also include a catalyst.

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