CN115352094A - Optical lens capable of preventing light pollution and preparation process thereof - Google Patents
Optical lens capable of preventing light pollution and preparation process thereof Download PDFInfo
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- CN115352094A CN115352094A CN202211137624.9A CN202211137624A CN115352094A CN 115352094 A CN115352094 A CN 115352094A CN 202211137624 A CN202211137624 A CN 202211137624A CN 115352094 A CN115352094 A CN 115352094A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 35
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- 239000000805 composite resin Substances 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
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- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 10
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- DITIBSDLGMCMTP-UHFFFAOYSA-N 5-methyl-2-methylsulfanyl-1h-[1,2,4]triazolo[1,5-a]pyrimidin-7-one Chemical group CC1=CC(=O)N2NC(SC)=NC2=N1 DITIBSDLGMCMTP-UHFFFAOYSA-N 0.000 claims description 6
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical group O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 4
- RJGHQTVXGKYATR-UHFFFAOYSA-L dibutyl(dichloro)stannane Chemical compound CCCC[Sn](Cl)(Cl)CCCC RJGHQTVXGKYATR-UHFFFAOYSA-L 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- AKQNYQDSIDKVJZ-UHFFFAOYSA-N triphenylsilane Chemical compound C1=CC=CC=C1[SiH](C=1C=CC=CC=1)C1=CC=CC=C1 AKQNYQDSIDKVJZ-UHFFFAOYSA-N 0.000 claims description 3
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 claims description 2
- 208000003464 asthenopia Diseases 0.000 abstract description 8
- 239000011521 glass Substances 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 11
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- MQDRKELSDPESDZ-UHFFFAOYSA-N triphenyl(sulfanyl)silane Chemical compound C=1C=CC=CC=1[Si](C=1C=CC=CC=1)(S)C1=CC=CC=C1 MQDRKELSDPESDZ-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
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- 229920001187 thermosetting polymer Polymers 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00865—Applying coatings; tinting; colouring
- B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
- C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Eyeglasses (AREA)
Abstract
The invention discloses an optical lens for preventing light pollution and a preparation process thereof, wherein the process specifically comprises the following steps: the first step is as follows: weighing 5-10 parts by weight of far infrared anion powder and 100-150 parts by weight of ultraviolet-proof optical resin composite material, and adding the materials into a grinding machine for grinding and crushing to obtain fine powder; the second step is that: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens; the third step: putting the resin lens prepared in the second step into hot water containing a colorant for dyeing to obtain the optical lens for preventing light pollution; the prepared optical lens has the refractive index of more than or equal to 1.6649, the light transmittance of more than 88 percent and good ultraviolet absorption performance, and the optical lens after dyeing treatment can filter blue light, effectively prevent light pollution, further relieve the eye fatigue and meet the requirements for manufacturing glasses.
Description
Technical Field
The invention belongs to the technical field of resin lenses, relates to an optical lens, and particularly relates to a preparation process of an optical lens for preventing light pollution.
Background
An optical lens is a common optical device for diverging and focusing by projection and refraction. The optical resin has better refractive power and smaller density, so compared with an inorganic material, an optical component prepared from the optical resin can obviously increase the space utilization rate of optical equipment aiming at a lens with the same focal length, thereby saving the use space, being lighter and more in line with the research and development trends of miniaturization and high performance.
The polyurethane resin material has the advantages of wear resistance, impact resistance, high transmittance and the like, is particularly suitable for producing medium and high refractive index spectacle lenses, and is an important development direction of novel optical resin in recent years. The polyurethane resin has a higher refractive index, impact strength and relatively smaller density than the vinyl optical resin. The polyurethane type optical resin has two types of thermoplasticity and thermosetting property, and is prepared by polyaddition reaction of active hydrogen compound containing more than bifunctionality (such as-OH and-SH) and isocyanate or isothiocyanate (OCN-R-NCO and SCN-R-NCS).
With the improvement of life quality, people have higher and higher requirements on the quality of glasses, particularly the protection function of the glasses, so that the development of an optical lens capable of effectively preventing light pollution is vital to the life of people, the existing lens has the functions of blue light prevention, ultraviolet prevention and the like to avoid the invasion of the light pollution to the eyes, and particularly, the ultraviolet prevention function of the glasses is basically that an ultraviolet film is coated on the glasses in the prior art, but the problems of UV agent overflow, glasses scratch abrasion and the like not only influence the sight, but also can generate irreversible damage to the ultraviolet prevention function.
Disclosure of Invention
The invention aims to provide an optical lens for preventing light pollution and a preparation process thereof.
The purpose of the invention can be realized by the following technical scheme:
a preparation process of an optical lens for preventing light pollution specifically comprises the following steps:
the first step is as follows: weighing 5-10 parts by weight of far infrared anion powder and 100-150 parts by weight of ultraviolet-proof optical resin composite material, and adding the materials into a grinder to grind and crush the materials to obtain fine powder, wherein the size of the fine powder is 1-55um; the optical resin contains an ultraviolet-proof component, is not easy to fall off, can maintain the ultraviolet-proof function for a long time, prolongs the service life of the optical lens and continuously prevents ultraviolet pollution;
the second step is that: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: putting the resin lens prepared in the second step into hot water at the temperature of 80-100 ℃, wherein the hot water contains 0.2-0.5% of colorant by mass concentration, and the dyed resin lens can filter blue light, effectively prevent light pollution and further relieve eye fatigue;
further, in the first step, the preparation method of the ultraviolet-proof optical resin composite material comprises the following steps:
weighing 100 parts by weight of isocyanate, 0.05-0.085 part by weight of catalyst dibutyltin dichloride, 1-3 parts by weight of release agent, 6-9.5 parts by weight of UV agent and 40-60 parts by weight of mercaptan, uniformly stirring and mixing, removing bubbles, quickly filling into a grinding tool, heating and curing, and setting the temperature rise degree: rapidly heating from room temperature of 25 ℃ to 40-45 ℃ at a speed of 40-45 ℃/h, then heating to 50-55 ℃ at a speed of 1-1.5 ℃/h, heating to 70-80 ℃ at a speed of 3-5 ℃/h, finally heating to 100-105 ℃ at a speed of 3-5 ℃/h, and keeping the temperature for 1-1.5h; and finally, demolding to obtain the ultraviolet-proof optical resin composite material.
Further, the isocyanate is hexamethylene isocyanate or m-xylylene isocyanate.
Further, the mercaptan is triphenyl silane mercaptan; the structural formula is as follows:
further, the UV agent is 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine; the structural formula is as follows:
the optical lens for preventing light pollution has refractive index not lower than 1.6649 and light transmittance higher than 88%.
The invention has the beneficial effects that:
the invention provides an optical lens for preventing light pollution, the refractive index is more than or equal to 1.6649, the light transmittance is more than 88%, and the optical lens has good ultraviolet absorption performance, the optical lens after dyeing can filter blue light, effectively prevent light pollution, further relieve the eye fatigue effect, and achieve the requirements for manufacturing glasses;
the anti-ultraviolet optical resin composite material adopted in the optical lens is obtained by crosslinking isocyanate, a UV agent and mercaptan under the action of a catalyst dibutyltin dichloride, and the anti-ultraviolet components contained in the optical resin composite material are linked in a crosslinking mode and are not easy to fall off, so that the anti-ultraviolet function can be maintained for a long time, the service life of the optical lens is prolonged, and the ultraviolet pollution is continuously prevented.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a light transmittance curve diagram of the ultraviolet-proof optical resin composite material of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the preparation method of the ultraviolet-proof optical resin composite material comprises the following steps:
weighing 100 parts by weight of isocyanate, 0.07 part by weight of dibutyltin dichloride as a catalyst, 1.2 parts by weight of a release agent, 8 parts by weight of a UV agent and 45 parts by weight of mercaptan, stirring and mixing uniformly, removing bubbles, quickly filling into a grinding tool, heating and curing, and setting the temperature rise degree: rapidly heating from room temperature of 25 ℃ to 40 ℃ at a speed of 40 ℃/h, then heating to 50 ℃ at a speed of 1 ℃/h, heating to 75 ℃ at a speed of 5 ℃/h, finally heating to 102 ℃ at a speed of 3 ℃/h, and keeping the temperature for 1.5h; finally, demoulding to obtain the ultraviolet-proof optical resin composite material; the appearance of the obtained ultraviolet-proof optical resin composite material is colorless and transparent.
The isocyanate is hexamethylene isocyanate;
the mercaptan is triphenyl silane mercaptan;
the UV agent is 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine;
test 1: carrying out solid refractive index test on the ultraviolet-proof optical resin composite material by using an Abbe refractometer, and taking the average value of 3 groups of values; three groups of values are: 1.6662,1.6661; the refractive index averages 1.666.
And (3) testing 2: testing the glass transition temperature of the ultraviolet-proof optical resin composite material by adopting a differential scanning calorimeter, wherein the heating rate is set to be 8 ℃/min; the Tg was measured to be 82.9 ℃;
and (3) testing: testing the light transmittance of the ultraviolet-proof optical resin composite material by using a UV3600 ultraviolet spectrophotometer according to the national standard GB/T2410-2008; setting test conditions: the room temperature is 20-30 ℃, the test light source is a tungsten lamp, and the wavelength scanning range is 200-750nm;
as shown in figure 1, the ultraviolet-proof optical resin composite material has small change of light transmittance within a visible light range of 400-700nm, the light transmittance is over 95 percent, the light transmittance is excellent, the ultraviolet absorption cutoff wavelength is about 305nm, and the ultraviolet-proof optical resin composite material has good ultraviolet resistance.
Example 1
The preparation process of the optical lens for preventing light pollution specifically comprises the following steps:
the first step is as follows: weighing 5 parts by weight of far infrared anion powder and 110 parts by weight of ultraviolet-proof optical resin composite material, and adding the mixture into a grinding machine for grinding and crushing to obtain fine powder, wherein the size of the fine powder is 1-55 mu m;
the second step: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: putting the resin lens prepared in the second step into hot water with the temperature of 85 ℃, wherein the mass concentration of a coloring agent in the hot water is 0.3 percent, and then obtaining the optical lens with light pollution prevention; the resin lens after dyeing can filter blue light, effectively prevent light pollution and further relieve eye fatigue.
Example 2
The preparation process of the optical lens for preventing light pollution specifically comprises the following steps:
the first step is as follows: weighing 8 parts by weight of far infrared anion powder and 150 parts by weight of ultraviolet-proof optical resin composite material, and adding the far infrared anion powder and the ultraviolet-proof optical resin composite material into a grinding machine for grinding and crushing to obtain fine powder, wherein the size of the fine powder is 1-55 mu m;
the second step is that: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: putting the resin lens prepared in the second step into hot water at the temperature of 90 ℃, wherein the hot water contains 0.2% of colorant by mass concentration, and the resin lens subjected to dyeing treatment can filter blue light, effectively prevent light pollution and further relieve eye fatigue;
example 3
The preparation process of the optical lens for preventing light pollution specifically comprises the following steps:
the first step is as follows: weighing 10 parts by weight of far infrared anion powder and 130 parts by weight of ultraviolet-proof optical resin composite material, and adding the materials into a grinder to grind and crush the materials to obtain fine powder, wherein the size of the fine powder is 1-55um;
the second step is that: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: putting the resin lens prepared in the second step into hot water with the temperature of 85 ℃, wherein the hot water contains 0.5% of colorant by mass, and the dyed resin lens can filter blue light, effectively prevent light pollution and further relieve eye fatigue;
example 4
The preparation process of the optical lens for preventing light pollution specifically comprises the following steps:
the first step is as follows: weighing 9 parts by weight of far infrared anion powder and 128 parts by weight of ultraviolet-proof optical resin composite material, and adding the materials into a grinding machine for grinding and crushing to obtain fine powder, wherein the size of the fine powder is 1-55 mu m;
the second step is that: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: putting the resin lens prepared in the second step into hot water at the temperature of 95 ℃, wherein the hot water contains 0.4% of colorant by mass, and the dyed resin lens can filter blue light, effectively prevent light pollution and further relieve eye fatigue;
performance testing of the optical lenses prepared in examples 1 to 4
1. Mechanical Property measurement
TABLE 1 mechanical Property parameter Table of each optical lens
As can be seen from Table 1, the hardness of the optical lenses prepared in examples 1-4 is greater than or equal to 85HD, and the optical lenses have good wear resistance, and the possible reasons are that hexamethylene isocyanate, 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine serving as a UV agent and triphenylsilane thiol are compounded in the prepared optical resin composite material, the UV agent is 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine serving as the UV agent, a rigid benzene ring containing triphenylsilane thiol and a certain C-Si bond are contained, and the optical resin composite material achieves better hardness under the action of crosslinking density after crosslinking; the flushing strength is more than 26MPa, which indicates that the prepared optical lens has good toughness, and the possible reason is that the prepared optical resin composite material is compounded with hexamethylene isocyanate, 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine serving as a UV agent and triphenyl silanethiol, and the hexamethylene isocyanate has a long aliphatic chain structure and is beneficial to the rotation of a chain segment, so that the toughness is increased.
2. Optical performance test
Testing the solid refractive index of the optical lens by using an Abbe refractometer;
and testing the light transmittance, yellow index and haze of the optical lens by using a spectrocolorimeter.
TABLE 2 optical Property parameter Table of each optical lens
As can be seen from table 2, the refractive index of the optical lens prepared by the invention is about 1.665, the light transmittance is greater than 88%, and the optical lens has good ultraviolet absorption performance, and the optical lens subjected to dyeing treatment can filter blue light, effectively prevent light pollution, further relieve eye fatigue, and meet the requirements for manufacturing glasses.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (9)
1. A preparation process of an optical lens for preventing light pollution is characterized by comprising the following steps: the method specifically comprises the following steps:
the first step is as follows: weighing 5-10 parts by weight of far infrared anion powder and 100-150 parts by weight of ultraviolet-proof optical resin composite material, and adding the materials into a grinder to grind and crush the materials to obtain fine powder;
the second step: heating and melting the fine powder obtained in the first step, removing bubbles, and pouring into a grinding tool for cooling, curing and molding to obtain a resin lens;
the third step: and (3) putting the resin lens prepared in the second step into hot water containing a colorant for dyeing to obtain the optical lens for preventing light pollution.
2. The process for preparing an optical lens for preventing light pollution according to claim 1, wherein the process comprises the following steps: the size of the fine powder is 1-55um.
3. The process for preparing an optical lens according to claim 1, wherein the process comprises the following steps: in the third step, the mass concentration of the colorant in the hot water is 0.2-0.5%.
4. The process for preparing an optical lens for preventing light pollution according to claim 1, wherein the process comprises the following steps: in the third step, the temperature of the hot water is 80-100 ℃.
5. The process for preparing an optical lens according to claim 1, wherein the process comprises the following steps: in the first step, the preparation method of the ultraviolet-proof optical resin composite material comprises the following steps:
weighing 100 parts by weight of isocyanate, 0.05-0.085 part by weight of catalyst dibutyltin dichloride, 1-3 parts by weight of release agent, 6-9.5 parts by weight of UV agent and 40-60 parts by weight of mercaptan, uniformly stirring and mixing, removing bubbles, quickly filling into a grinding tool, heating and curing, and setting the temperature rise degree: rapidly heating from room temperature 25 deg.C to 40-45 deg.C at a speed of 40-45 deg.C/h, heating to 50-55 deg.C at a speed of 1-1.5 deg.C/h, heating to 70-80 deg.C at a speed of 3-5 deg.C/h, heating to 100-105 deg.C at a speed of 3-5 deg.C/h, and maintaining for 1-1.5h; and finally, demolding to obtain the ultraviolet-proof optical resin composite material.
6. The process for preparing an optical lens for preventing light pollution according to claim 5, wherein: the isocyanate is hexamethylene isocyanate or m-xylylene isocyanate.
7. The process for preparing an optical lens for preventing light pollution according to claim 5, wherein: the mercaptan is triphenyl silane mercaptan; the structural formula is as follows:
8. the process for preparing an optical lens for preventing light pollution according to claim 5, wherein: the UV agent is 7-hydroxy-5-methyl-2-methylthio-s-triazolo [1,5-a ] pyrimidine; the structural formula is as follows:
9. an optical lens manufactured by the manufacturing process according to claims 1 to 8, wherein: the refractive index of the optical lens is more than or equal to 1.6649, and the light transmittance is more than 88%.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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