High polymer material for rigid orthokeratology lens and preparation method of high polymer material

Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses a high polymer material for a rigid orthokeratology lens and a preparation method of the high polymer material. The high polymer material for the rigid orthokeratology lens comprises the following components in parts by weight: 30-50 parts of an organosiloxane monomer; 5-15 parts of a perfluoroalkyl ester monomer; 10 to 20 parts of a sulfone monomer; 20 to 40 parts of a hardening agent; 5-10 parts of a cross-linking agent; and 3-6 parts of a wetting agent. Researches show that the high polymer material for the rigid orthokeratology lens has a relatively high oxygen permeability coefficient, and overcomes the technical defect of poor oxygen permeability of fluorine-containing siloxane or methacrylate polymers in the prior art; the important application value is realized. In addition, by adding the wetting agent, the surface hydrophilicity of the high polymer material for the rigid orthokeratology lens can be improved, and the anti-fouling performance of the high polymer material can be improved; by adding the hardening agent, the mechanical property of the high polymer material for the rigid orthokeratology lens can be further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a polymer material for hard orthokeratology lenses and a preparation method thereof. Background Art

[0002] Rigid orthokeratology (RGP) is an ophthalmic medical device used to correct vision problems. Compared with soft contact lenses, RGP has higher oxygen permeability, better visual quality and stronger durability. With the changes in modern people's lifestyles and the increasing demand for high-quality visual experience, the application scope of RGP is gradually expanding, especially in the field of myopia prevention and control among adolescents.

[0003] The effectiveness and safety of rigid orthokeratology lenses depend largely on the properties of their materials. Ideal materials should have the following characteristics: high oxygen permeability, good biocompatibility, sufficient mechanical strength, appropriate flexibility and wear resistance. Traditional rigid orthokeratology lenses are mostly made of fluorinated silicone or methacrylate polymers, which have some deficiencies, such as limited oxygen permeability and poor surface hydrophilicity, and need further improvement. Summary of the invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a polymer material for a hard orthokeratology lens and a preparation method thereof.

[0005] The above technical problems to be solved by the present invention are achieved through the following technical solutions:

[0006] The present invention provides a polymer material for hard orthokeratology lenses, which comprises the following components in parts by weight:

[0007] 30-50 parts of organic siloxane monomer; 5-15 parts of perfluoroalkyl ester monomer; 10-20 parts of sulfone monomer; 20-40 parts of hardener; 5-10 parts of crosslinker; 3-6 parts of wetting agent.

[0008] The present invention provides a new polymer material for hard orthokeratology lenses; the invention can make the prepared polymer material for hard orthokeratology lenses have better oxygen permeability by selecting the type of organic silicone monomer in the raw materials for preparing the polymer material for hard orthokeratology lenses.

[0009] The addition of a wetting agent can help improve the surface hydrophilicity of the polymer material used in hard orthokeratology lenses and improve its anti-fouling performance. In addition, the addition of a hardener can help further improve the mechanical properties of the polymer material used in hard orthokeratology lenses.

[0010] Most preferably, the polymer material for hard orthokeratology lenses comprises the following components in parts by weight:

[0011] 40 parts of organosiloxane monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0012] Preferably, the organosiloxane monomer is selected from methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane or 3-(phenylamino)propyltrimethoxysilane.

[0013] More preferably, the organosiloxane monomer consists of methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane.

[0014] More preferably, the weight ratio of methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane is 2-4:1-3:1-3.

[0015] Most preferably, the weight ratio of methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane is 3:2:2.

[0016] The inventors found in the research that the selection of the type of organosiloxane monomer has an important influence on the oxygen permeability of the polymer material for rigid gas permeable contact lenses; in the present invention, a polymer material for rigid gas permeable contact lenses prepared by selecting an organosiloxane monomer composed of three components, namely methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane, has much better oxygen permeability than a polymer material for rigid gas permeable contact lenses prepared by using a single methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane or 3-(phenylamino)propyltrimethoxysilane as the organosiloxane monomer. Selecting an organosiloxane monomer composed of three components, namely methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane, can synergistically improve the oxygen permeability of the polymer material for rigid gas permeable contact lenses.

[0017] The inventors also found in their research that it is necessary to select a high-molecular material for rigid contact lenses prepared from a silicone oxyalkyl monomer composed of three components: methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane. Compared with the high-molecular material for rigid contact lenses prepared from a single silicone oxyalkyl monomer, its oxygen permeability can be significantly improved. However, for a high-molecular material for rigid contact lenses prepared from any two of the three components, namely methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane, its oxygen permeability cannot be significantly improved compared with the high-molecular material for rigid contact lenses prepared from a single silicone oxyalkyl monomer.

[0018] Preferably, the perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate or hexafluorobutyl methacrylate.

[0019] The sulfone monomer is selected from methyl vinyl sulfone or phenyl vinyl sulfone.

[0020] Preferably, the hardener is selected from cyclohexyl methacrylate or methyl methacrylate.

[0021] Preferably, the crosslinking agent is a crosslinking agent with a methacrylate group at the end prepared from polydimethylsiloxane diol and 2-isocyanatoethyl methacrylate.

[0022] Preferably, the wetting agent is selected from methacrylic acid or N-vinylpyrrolidone.

[0023] The present invention also provides a preparation method of the above-mentioned high-molecular material for rigid contact lenses, which comprises the following steps:

[0024] (1) Mix an organosiloxanyl ester monomer, a perfluoroalkyl ester monomer, a sulfone monomer, a hardener, a crosslinking agent, and a wetting agent to obtain a raw material mixture, then add a photoinitiator, and stir at 20-30°C for 20-40 minutes to obtain a mixed solution;

[0025] (2) Pour the mixed solution into a mold for ultraviolet crosslinking and thermal curing to obtain the high-molecular material for rigid contact lenses.

[0026] Preferably, the addition weight of the photoinitiator in step (1) is 0.5-1.5% of the weight of the raw material mixture.

[0027] Preferably, the photoinitiator is 2-hydroxy-2-methylpropiophenone.

[0028] Beneficial effects: The present invention provides a brand-new polymer material for rigid gas permeable contact lenses. Research shows that the polymer material for rigid gas permeable contact lenses of the present invention has a relatively high oxygen permeability coefficient, overcoming the technical defect of poor oxygen permeability of fluorosiloxane or methacrylate polymers in the prior art, and has important application value.

[0029] In addition, by adding a wetting agent, the present invention can help improve the surface hydrophilicity of the polymer material for rigid gas permeable contact lenses and enhance its anti-fouling performance; by adding a hardening agent, it can help further improve the mechanical properties of the polymer material for rigid gas permeable contact lenses. Specific embodiments

[0030] The following specific embodiments are used to further explain the present invention, but the embodiments do not limit the present invention in any form.

[0031] Example 1 Preparation of polymer material for rigid gas permeable contact lenses

[0032] Composition by weight of raw materials: 40 parts of organosiloxane-based monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardening agent; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0033] The organosiloxane-based monomer is selected from methacryloxypropyltris(trimethylsiloxy)silane;

[0034] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardening agent is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0035] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% dibutyltin dilaurate by weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to generate a crosslinking agent with a methacrylate group at the end.

[0036] Preparation method: (1) Mix the organosiloxane-based ester monomer, perfluoroalkyl ester monomer, sulfone monomer, hardening agent, crosslinking agent, and wetting agent to obtain a raw material mixture, then add 1% by weight of the raw material mixture of a photoinitiator (2-hydroxy-2-methylpropiophenone), and stir at 25 °C for 30 min to obtain a mixed solution;

[0037] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the polymer material for rigid gas permeable contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2, irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0038] Example 2 Preparation of a Polymer Material for Rigid Gas-Permeable Contact Lenses

[0039] The raw material weight composition: 40 parts of organosiloxanyl monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0040] The organosiloxanyl monomer is selected from 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane;

[0041] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0042] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% of dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to produce a crosslinking agent with a methacrylate group at the end.

[0043] Preparation method: (1) Mix the organosiloxanyl ester monomer, perfluoroalkyl ester monomer, sulfone monomer, hardener, crosslinking agent and wetting agent to obtain a raw material mixture, and then add 1% of a photoinitiator (2-hydroxy-2-methylpropiophenone) based on the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0044] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the polymer material for rigid gas-permeable contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0045] Example 3 Preparation of a Polymer Material for Rigid Gas-Permeable Contact Lenses

[0046] The raw material weight composition: 40 parts of organosiloxanyl monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0047] The organosiloxanyl monomer is selected from 3-(phenylamino)propyltrimethoxysilane;

[0048] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0049] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to produce a crosslinking agent with a methacrylate group at the end.

[0050] Preparation method: (1) Mix the organosiloxanyl ester monomer, perfluoroalkyl ester monomer, sulfone monomer, hardener, crosslinking agent, and wetting agent to obtain a raw material mixture, and then add 1% photoinitiator (2-hydroxy-2-methylpropiophenone) based on the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0051] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the high molecular material for rigid gas permeable contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0052] Example 4 Preparation of High Molecular Material for Rigid Gas Permeable Contact Lenses

[0053] Composition by weight of raw materials: 40 parts of organosiloxanyl monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0054] The organosiloxanyl monomer is composed of methacryloxypropyl tris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyl trimethoxysilane, and 3-(phenylamino)propyl trimethoxysilane in a weight ratio of 3:2:2.

[0055] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0056] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to produce a crosslinking agent with a methacrylate group at the end.

[0057] Preparation method: (1) Mix an organosiloxanyl ester monomer, a perfluoroalkyl ester monomer, a sulfone monomer, a hardener, a crosslinking agent, and a wetting agent to obtain a raw material mixture. Then, add a photoinitiator (2-hydroxy-2-methylpropiophenone) accounting for 1% of the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0058] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the high molecular material for rigid contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0059] Example 5 Preparation of High Molecular Material for Rigid Contact Lenses

[0060] Composition of raw material by weight: 40 parts of organosiloxanyl monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0061] The organosiloxanyl monomer is composed of methacryloxypropyltris(trimethylsiloxy)silane and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane in a weight ratio of 3:2.

[0062] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0063] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% of dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to generate a crosslinking agent with a methacrylate group at the end.

[0064] Preparation method: (1) Mix an organosiloxanyl ester monomer, a perfluoroalkyl ester monomer, a sulfone monomer, a hardener, a crosslinking agent, and a wetting agent to obtain a raw material mixture. Then, add a photoinitiator (2-hydroxy-2-methylpropiophenone) accounting for 1% of the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0065] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the high molecular material for rigid contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0066] Preparation of Polymer Material for Rigid Gas-Permeable Contact Lenses in Example 6

[0067] Composition by weight of raw materials: 40 parts of organosiloxane monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0068] The organosiloxane monomer is composed of methacryloxypropyltris(trimethylsiloxy)silane and 3-(phenylamino)propyltrimethoxysilane in a weight ratio of 3:2.

[0069] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid.

[0070] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% of dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to form a crosslinking agent with a methacrylate group at the end.

[0071] Preparation method: (1) Mix the organosiloxane ester monomer, perfluoroalkyl ester monomer, sulfone monomer, hardener, crosslinking agent, and wetting agent to obtain a raw material mixture, and then add 1% of a photoinitiator (2-hydroxy-2-methylpropiophenone) based on the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0072] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the polymer material for rigid gas-permeable contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0073] Preparation of Polymer Material for Rigid Gas-Permeable Contact Lenses in Example 7

[0074] Composition by weight of raw materials: 40 parts of organosiloxane monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinking agent; 5 parts of wetting agent.

[0075] The organosiloxane monomer is composed of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and 3-(phenylamino)propyltrimethoxysilane in a weight ratio of 1:1.

[0076] The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate; the sulfone monomer is selected from methyl vinyl sulfone; the hardener is selected from cyclohexyl methacrylate; the wetting agent is selected from methacrylic acid;

[0077] The crosslinking agent is prepared by the following method: Mix polydimethylsiloxane diol (Mn = 2000) and 2-isocyanatoethyl methacrylate (IEM) in a molar ratio of 1:2, add 0.1% dibutyltin dilaurate based on the weight of the raw materials, and react at 70 °C for 5 h under nitrogen protection to generate a crosslinking agent with a methacrylate group at the end.

[0078] Preparation method: (1) Mix the organosiloxane ester monomer, perfluoroalkyl ester monomer, sulfone monomer, hardener, crosslinking agent, and wetting agent to obtain a raw material mixture, and then add 1% photoinitiator (2-hydroxy-2-methylpropiophenone) based on the weight of the raw material mixture, and stir at 25 °C for 30 min to obtain a mixed solution;

[0079] (2) Pour the mixed solution into a polytetrafluoroethylene mold for ultraviolet crosslinking and thermal curing to obtain the high molecular material for rigid contact lenses; the specific conditions for the ultraviolet crosslinking are: wavelength 365 nm, intensity 10 - 15 mW / cm 2 , irradiate for 15 min; the thermal curing specifically refers to thermal curing at 85 °C for 3 h.

[0080] The high molecular materials for rigid contact lenses prepared in Examples 1 - 7 were tested for their oxygen permeability coefficient with reference to ISO 18369-1; the test results are shown in Table 1.

[0081] Table 1. Test results of the oxygen permeability coefficient of the high molecular material for rigid contact lenses of the present invention

[0082]

[0083] It can be seen from the experimental data in Table 1 that for the high molecular materials for rigid contact lenses prepared in Examples 1 - 3, their oxygen permeability coefficients are between 70 and 100 barrer, and there are also obvious differences in the oxygen permeability coefficients of the high molecular materials for rigid contact lenses prepared with different organosiloxane monomers. This shows that: the high molecular material for rigid contact lenses of the present invention has good oxygen permeability performance; and the selection of the organosiloxane monomer has an important influence on the oxygen permeability performance of the high molecular material for rigid contact lenses.

[0084] It can be seen from the experimental data in Table 1 that the oxygen permeability coefficient of the high molecular material for rigid contact lenses prepared in Example 4 is much higher than that of the high molecular materials for rigid contact lenses prepared in Examples 1 to 3. This shows that: in the present invention, the high molecular material for rigid contact lenses prepared by using an organosiloxanyl monomer composed of three components such as methacryloxypropyltris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane has much better oxygen permeability performance than the high molecular material for rigid contact lenses prepared by using a single methacryloxypropyltris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, or 3-(phenylamino)propyltrimethoxysilane as the organosiloxanyl monomer. Selecting an organosiloxanyl monomer composed of three components such as methacryloxypropyltris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane can synergistically improve the oxygen permeability performance of the high molecular material for rigid contact lenses.

[0085] It can be seen from the experimental data in Table 1 that the oxygen permeability coefficient of the high molecular materials for rigid contact lenses prepared in Examples 5 to 7 is comparable to that of the high molecular materials for rigid contact lenses prepared in Examples 1 to 3. This shows that: in the present invention, it is necessary to select the high molecular material for rigid contact lenses prepared by using an organosiloxanyl monomer composed of three components such as methacryloxypropyltris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane. Compared with the high molecular material for rigid contact lenses prepared by using a single organosiloxanyl monomer, its oxygen permeability performance can be greatly improved. However, for the high molecular material for rigid contact lenses prepared by using an organosiloxanyl monomer composed of any two of the three components such as methacryloxypropyltris(trimethylsiloxy)silane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-(phenylamino)propyltrimethoxysilane, compared with the high molecular material for rigid contact lenses prepared by using a single organosiloxanyl monomer, its oxygen permeability performance cannot be greatly improved.

Claims

1. A polymer material for hard orthokeratology lenses, characterized in that: Contains the following components in parts by weight: 30-50 parts of organic siloxane monomer; 5-15 parts of perfluoroalkyl ester monomer; 10-20 parts of sulfone monomer; 20-40 parts of hardener; 5-10 parts of crosslinker; 3-6 parts of wetting agent.

2. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: Contains the following components in parts by weight: 40 parts of organosiloxane monomer; 10 parts of perfluoroalkyl ester monomer; 15 parts of sulfone monomer; 30 parts of hardener; 8 parts of crosslinker; 5 parts of wetting agent.

3. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The organic siloxane monomer is selected from methacryloxypropyl tris(trimethylsiloxane)silane, 2-(3,4-epoxycyclohexane)ethyltrimethoxysilane or 3-(phenylamino)propyltrimethoxysilane.

4. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The perfluoroalkyl ester monomer is perfluorohexylethyl methacrylate or hexafluorobutyl methacrylate.

5. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The sulfone monomer is selected from methyl vinyl sulfone or phenyl vinyl sulfone.

6. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The hardener is selected from cyclohexyl methacrylate or methyl methacrylate.

7. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The crosslinking agent is a crosslinking agent containing methacrylate groups at the end, which is prepared by using polydimethylsiloxane diol and 2-ethyl isocyanate methacrylate as raw materials.

8. The polymer material for hard orthokeratology lenses according to claim 1, characterized in that: The wetting agent is selected from methacrylic acid or N-vinyl pyrrolidone.

9. The method for preparing a polymer material for a hard orthokeratology lens according to any one of claims 1 to 8, characterized in that: The following steps are included: (1) mixing an organic siloxane alkyl ester monomer, a perfluoroalkyl ester monomer, a sulfone monomer, a hardener, a crosslinking agent, and a wetting agent to obtain a raw material mixture, then adding a photoinitiator, and stirring at 20 to 30° C. for 20 to 40 minutes to obtain a mixed solution; (2) The mixed liquid is poured into a mold for UV crosslinking and thermal curing to obtain the polymer material for rigid orthokeratology lenses.

10. The method for preparing a polymer material for a hard orthokeratology lens according to claim 9, characterized in that: The added weight of the photoinitiator in step (1) is 0.5-1.5% of the weight of the raw material mixture; Preferably, the photoinitiator is 2-hydroxy-2-methylpropiophenone.

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