WO2016121804A1 - 眼内レンズ用材料及び眼内レンズ用材料の保存方法 - Google Patents
眼内レンズ用材料及び眼内レンズ用材料の保存方法 Download PDFInfo
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- WO2016121804A1 WO2016121804A1 PCT/JP2016/052293 JP2016052293W WO2016121804A1 WO 2016121804 A1 WO2016121804 A1 WO 2016121804A1 JP 2016052293 W JP2016052293 W JP 2016052293W WO 2016121804 A1 WO2016121804 A1 WO 2016121804A1
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- meth
- acrylate
- intraocular lens
- lens material
- monomer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/30—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety
- C08F220/301—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety and one oxygen in the alcohol moiety
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/16—Materials or treatment for tissue regeneration for reconstruction of eye parts, e.g. intraocular lens, cornea
Definitions
- the present invention relates to an intraocular lens material and a method for storing the intraocular lens material.
- an acrylic material is preferable because it has a high refractive index and opens slowly after being inserted into the eye.
- the shape recoverability is increased, the elongation rate of the lens is decreased, and if there is a scratch or the like, the material becomes a brittle material that can be easily torn.
- the material in order to insert the lens into the eye from the smallest incision, it is desirable that the material has a high elongation rate and does not crack or tear.
- Such intraocular lens materials include a polymer obtained by polymerizing a polymerization component containing a hydrophilic monomer including a hydroxyl group-containing alkyl (meth) acrylate, a (meth) acrylamide monomer and N-vinyl lactam. Therefore, a water absorption rate of 1.5 to 4.5% by mass has been proposed (see, for example, Patent Document 1).
- This intraocular lens material is excellent in flexibility and has a high refractive index, so that the lens can be thinned and can be inserted through the incision from a folded state, and it is also transparent. It can be excellent and does not cause greaseing.
- the present invention has been made in view of such problems, and provides an intraocular lens material and a method for preserving the intraocular lens material that are superior in flexibility and strength and can suppress the occurrence of grease.
- the main purpose is to do.
- the present inventors have determined that in the intraocular lens material, the molar fraction of the hydrophilic monomer and the molar fraction of the crosslinkable monomer are within a predetermined preferred range.
- the present inventors have found that it is more excellent in flexibility and strength and can suppress the occurrence of greaseing, thereby completing the present invention.
- the intraocular lens material of the present invention comprises a polymer obtained by polymerizing a polymerizable composition containing a hydrophilic monomer and a crosslinkable monomer, and comprises a molar fraction A of the hydrophilic monomer and a mole of the crosslinkable monomer.
- a ⁇ B value which is the product of the fraction B exceeds 2.1 ⁇ 10 -3, less than 3.6 ⁇ 10 -3, mole fraction B of the crosslinking monomer is 2.4 ⁇ 10 -
- the refractive index n of the polymer in a hydrated state is less than 2 and 1.5 or more.
- the method for preserving the intraocular lens material of the present invention is to enclose the intraocular lens material and a moisture-controlling material containing moisture in a moisture-proof package.
- an intraocular lens material that is more excellent in flexibility and strength and suppresses the occurrence of grease, and a method for preserving the intraocular lens material.
- the reason why such an effect is obtained is estimated as follows, for example.
- a small bright spot called grease condensation of water molecules in the lens
- the intraocular lens is inserted into the eye from an incision as small as possible in the folded state, it is desired that the intraocular lens has a high elongation rate. In order to increase the elongation rate, it is effective to lower the crosslink density.
- the A ⁇ B value which is the product of the molar fraction A of the hydrophilic monomer and the molar fraction B of the crosslinkable monomer, exceeds 2.1 ⁇ 10 ⁇ 3 and is less than 3.6 ⁇ 10 ⁇ 3 .
- Explanatory drawing which shows an example of the moisture-proof package 10 of this embodiment. Explanatory drawing of the test piece used for elongation rate measurement.
- the intraocular lens material of the present invention comprises a polymer obtained by polymerizing a polymerizable composition containing a hydrophilic monomer and a crosslinkable monomer, and includes a molar fraction A of the hydrophilic monomer and a molar fraction B of the crosslinkable monomer.
- the A ⁇ B value is 2.1 ⁇ 10 ⁇ 3 and is less than 3.6 ⁇ 10 ⁇ 3
- the molar fraction B of the crosslinkable monomer is less than 2.4 ⁇ 10 ⁇ 2
- the refractive index n of the polymer in a hydrated state is 1.5 or more.
- the intraocular lens material preferably contains an aromatic ring-containing (meth) acrylate and an alkyl (meth) acrylate having an alkyl group having 1 to 20 carbon atoms as a main component in the polymerizable composition. That is, the polymerizable composition that is a raw material for the intraocular lens material may include at least a main component monomer, a hydrophilic monomer, and a crosslinkable monomer.
- the aromatic ring-containing (meth) acrylate as the main monomer may be a component having an action of improving the refractive index of the intraocular lens material.
- the aromatic ring-containing (meth) acrylate include phenoxyethyl (meth) acrylate, phenylethyl (meth) acrylate, benzyl (meth) acrylate, phenyl (meth) acrylate, and pentabromophenyl (meth) acrylate. These can be used alone or in admixture of two or more.
- phenoxyethyl acrylate, phenylethyl acrylate, and benzyl acrylate are preferable because the effect of increasing the refractive index is large, and phenoxyethyl acrylate is particularly preferable from the viewpoint of further improving flexibility.
- the content of the aromatic ring-containing (meth) acrylate is preferably in the range of 15% by mass to 80% by mass and more preferably in the range of 50% by mass to 70% by mass with respect to the entire main component. It may be a thing.
- Alkyl (meth) acrylates having 1 to 20 carbon atoms in the alkyl group as the main component monomer may be components having an action of improving the shape recoverability and flexibility of the intraocular lens material.
- the alkyl (meth) acrylate include methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, heptyl acrylate, nonyl acrylate, stearyl (meth) acrylate, octyl (meth) acrylate, and decyl (meth) ) Acrylate, lauryl (meth) acrylate, pentadecyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclopentyl acrylate, cyclohexyl acrylate, etc., linear, branched or cyclic alkyl (meth) acryl
- alkyl acrylates having 1 to 5 carbon atoms in the alkyl group are preferred, and ethyl acrylate and butyl acrylate are particularly preferred from the viewpoint that the effect of improving shape recoverability and flexibility is great.
- the content of the alkyl (meth) acrylate is preferably in the range of 20% by mass to 85% by mass with respect to the entire main component, and may be in the range of 30% by mass to 50% by mass. Good.
- the hydrophilic monomer contained in the polymerizable composition is a component that imparts hydrophilicity to the intraocular lens material, and may be a component that has an action of promoting a decrease in the greaseing of the intraocular lens material.
- the hydrophilic monomer may include one or more of a hydroxyl group-containing alkyl (meth) acrylate having 1 to 20 carbon atoms in the alkyl group, a (meth) acrylamide monomer, and N-vinyl lactam. Moreover, it is good also as what contains another hydrophilic monomer.
- hydroxyl-containing alkyl (meth) acrylate examples include hydroxyalkyl (meth) acrylates such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and hydroxypentyl (meth) acrylate.
- hydroxyl group-containing alkyl (meth) acrylate examples include dihydroxyalkyl (meth) acrylates such as dihydroxypropyl (meth) acrylate, dihydroxybutyl (meth) acrylate, and dihydroxypentyl (meth) acrylate.
- Examples of (meth) acrylamide monomers include N, N-dialkyl (meth) acrylamides such as N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, and N, N-dipropyl (meth) acrylamide. Is mentioned.
- Examples of the (meth) acrylamide monomer include N, N-dialkylaminoalkyl (meth) acrylamides such as N, N-dimethylaminopropyl (meth) acrylamide and N, N-diethylaminopropyl (meth) acrylamide.
- N-vinyl lactam examples include N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl caprolactam and the like.
- hydrophilic monomers examples include diethylene glycol mono (meth) acrylate, triethylene glycol mono (meth) acrylate, propylene glycol mono (meth) acrylate, (meth) acrylic acid, 1-methyl-3-methylene-2- Examples include pyrrolidinone, maleic anhydride, maleic acid, maleic acid derivatives, fumaric acid, fumaric acid derivatives, aminostyrene, and hydroxystyrene.
- the hydrophilic monomer mentioned above can be used individually or in mixture of 2 or more types.
- hydrophilic monomers a hydroxyl group-containing alkyl (meth) acrylate or (meth) acrylamide monomer is preferable because it has a large effect of promoting the reduction of grease.
- the molar fraction A of the hydrophilic monomer with respect to the entire polymerizable composition is preferably more than 0.9 ⁇ 10 ⁇ 1, and more preferably 1.7 ⁇ 10 ⁇ 1 or more. Further, the molar fraction A of the hydrophilic monomer is preferably less than 3.6 ⁇ 10 ⁇ 1 , and more preferably 2.8 ⁇ 10 ⁇ 1 or less.
- the content of the hydrophilic monomer in the polymerizable composition is preferably in the range of 15 parts by mass or more and 25 parts by mass or less, and more preferably 20 parts by mass or more with respect to 100 parts by mass of the main component. In this range, the effect of promoting the reduction of grease can be sufficiently expressed.
- the crosslinkable monomer contained in the polymerizable composition controls the flexibility of the material for the intraocular lens, imparts good mechanical strength, further improves the shape recoverability, and also has hydrophilic monomers and other polymerizable properties. It is good also as a component which has the effect
- the crosslinkable monomer include butanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, and dipropylene.
- the molar fraction B of the crosslinkable monomer with respect to the entire polymerizable composition is less than 2.4 ⁇ 10 ⁇ 2 .
- the molar fraction B of the crosslinkable monomer is preferably less than 2.1 ⁇ 10 ⁇ 2 , more preferably 1.7 ⁇ 10 ⁇ 2 or less, and less than 1.6 ⁇ 10 ⁇ 2. More preferably.
- the molar fraction B of the crosslinkable monomer is preferably 1.0 ⁇ 10 ⁇ 2 or more, and more preferably 1.1 ⁇ 10 ⁇ 2 or more.
- the content of the crosslinkable monomer in the polymerizable composition is preferably in the range of 1 part by mass to 3 parts by mass and more preferably 1 part by mass to 2 parts by mass with respect to 100 parts by mass of the main component. preferable. In this range, the flexibility can be further increased.
- UV absorbers and pigments can be added to the polymerizable composition.
- the ultraviolet absorber include benzophenones such as 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-octoxybenzophenone, and 2- (2′-hydroxy-5′-methacryloxyethyleneoxy-t-butyl). Phenyl) -5-methyl-benzotriazole, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 5-chloro-2 (3'-t-butyl-2'-hydroxy-5'-methylphenyl) ) Benzotriazoles such as benzotriazole, salicylic acid derivatives, hydroxyacetophenone derivatives and the like.
- the compounding quantity of a ultraviolet absorber shall be the range of 0.05 mass part or more and 3 mass parts or less with respect to 100 mass parts of polymeric composition whole quantity, for example.
- the pigment is preferably a yellow to orange pigment.
- the dye include oil-soluble dyes such as CI solvent yellow and CI solvent orange described in the color index (CI), disperse dyes such as CI disperse yellow and CI disperse orange, and vat dyes.
- the blending amount of the dye is preferably in the range of 0.01 to 3 parts by mass with respect to 100 parts by mass of the total amount of the polymerizable composition.
- the polymerizable composition may be polymerized by adding, for example, a radical polymerization initiator or a photopolymerization initiator.
- a radical polymerization initiator may be added to the polymerizable composition and then heated, or may be irradiated with electromagnetic waves such as microwaves, ultraviolet rays, and radiation ( ⁇ rays).
- electromagnetic waves such as microwaves, ultraviolet rays, and radiation ( ⁇ rays).
- examples of the radical polymerization initiator include azobisisobutyronitrile, azobisdimethylvaleronitrile, benzoyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, and the like.
- a photoinitiator and a sensitizer are preferable to add further.
- the photopolymerization initiator include benzoin compounds such as methyl orthobenzoylbenzoate, phenone compounds such as 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, Examples include thioxanthone compounds such as phenyl-1,2-propanedione-2- (o-ethoxycarbonyl) oxime, 2-chlorothioxanthone, dibenzosvalon, 2-ethylanthraquinone, benzophenone acrylate, benzophenone, benzyl, etc.
- the amount of the polymerization initiator or sensitizer used is 0.01 parts by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the total amount of the polymerizable composition in order to advance the polymerization reaction at a sufficient rate. preferable.
- the intraocular lens material of the present invention is molded into an intraocular lens, it can be performed by, for example, a cutting method or a mold method.
- the A ⁇ B value which is the product of the molar fraction A of the hydrophilic monomer and the molar fraction B of the crosslinkable monomer, exceeds 2.1 ⁇ 10 ⁇ 3 and 3.6 ⁇ 10 ⁇ 3 and the molar fraction B of the crosslinkable monomer is less than 2.4 ⁇ 10 ⁇ 2 .
- the A ⁇ B value is preferably 2.2 ⁇ 10 ⁇ 3 or more, and preferably less than 3.5 ⁇ 10 ⁇ 3 .
- the intraocular lens material of the present invention has a refractive index n of 1.5 or more in a hydrated state.
- the intraocular lens material of the present invention has an A ⁇ B value of more than 2.1 ⁇ 10 ⁇ 3 and less than 3.6 ⁇ 10 ⁇ 3 , and a molar fraction B of the crosslinkable monomer of 2.4 ⁇ 10 6. It is in the range of less than ⁇ 2 , and the decrease in the refractive index between the dry state and the water absorption state is further suppressed.
- the elongation rate of the intraocular lens material of the present invention is preferably 290% or more, and more preferably 300% or more. When the elongation percentage is 290% or more, the flexibility of the intraocular lens material can be further increased. This elongation is preferably 600% or less from the viewpoint of the shape recoverability of the intraocular lens material.
- This elongation rate (%) is the maximum when a dumbbell-shaped test piece (see FIG. 2 described later) is immersed in constant temperature water at 25 ° C. and left for 1 minute, and then pulled until it breaks at a rate of 100 mm / min. It was set as the strain at the time of loading.
- the glass transition temperature (Tg) is preferably 30 ° C. or lower, more preferably 25 ° C. or lower, and further preferably 20 ° C. or lower.
- the intraocular lens material of the present invention preferably has a water absorption (mass%) in the range of 2.2 mass% to 4.5 mass%.
- the water absorption is 2.2% by mass or more, the occurrence of grease can be suppressed, and when it is 4.5% by mass or less, the decrease in flexibility and the decrease in shape recoverability can be further suppressed.
- the intraocular lens material of the present invention is excellent in flexibility and has a high refractive index, so that the lens can be thinned and can be folded and inserted through a small incision. It has excellent transparency and can suppress the occurrence of grease.
- the intraocular lens material storage method of the present invention encloses any of the above-described intraocular lens materials and a moisture-conditioning material containing moisture in a moisture-proof package.
- the moisture conditioner is a package insert (paper) that has absorbed moisture.
- the package insert also serves as a humidity control agent, so that the humidity atmosphere in the moisture-proof package can be adjusted with a simple configuration.
- the humidity conditioner is not particularly limited to paper, and may be a polymer material that has absorbed water. If it carries out like this, water absorption can be raised more.
- the moisture-proof package is preferably a package having a moisture permeability of 0.1 g / (m 2 ⁇ day) or less (40 ° C., 90% RH), such as an aluminum laminated bag or Tech Barrier (registered trademark).
- FIG. 1 is an explanatory view showing an example of the moisture-proof package 10.
- the moisture-proof package 10 relates to the handling of an intraocular lens 20 made of the intraocular lens material of the present invention, an insertion device 12 containing the intraocular lens 20, and an intraocular lens made of paper.
- the package insert 14 is enclosed.
- the insertion instrument 12 that houses the intraocular lens 20 is stored in the sterilization package 11.
- the package insert 14 may be an instruction manual for the insertion instrument 12 and the intraocular lens 20.
- the moisture absorption amount of the package insert 14 may be appropriately set based on, for example, the flexibility of the intraocular lens 20 and the maximum water absorption rate.
- the method of absorbing moisture into the humidity control agent may be performed, for example, in a constant temperature and humidity chamber set at a predetermined temperature (eg, room temperature) and a predetermined relative humidity (eg, 40 to 70% RH), It is good also as what is performed by giving a water droplet.
- a predetermined temperature eg, room temperature
- a predetermined relative humidity eg, 40 to 70% RH
- the moisture absorption amount (moisture absorption amount) of the humidity control agent is larger.
- an A ⁇ B value that is the product of the molar fraction A of the hydrophilic monomer and the molar fraction B of the crosslinkable monomer Is more than 2.1 ⁇ 10 ⁇ 3 and less than 3.6 ⁇ 10 ⁇ 3
- the molar fraction B of the crosslinkable monomer is less than 2.4 ⁇ 10 ⁇ 2
- Generation of grease can be suppressed.
- the reason for this is that the elongation can be increased by lowering the crosslink density, and further, the occurrence of greasening that can occur by lowering the crosslink density can be suppressed by increasing the water absorption. Inferred.
- the intraocular lens 20 is stored in the insertion device 12.
- the present invention is not particularly limited thereto, and the intraocular lens 20 is not in the insertion device but in a moisture-proof package together with a humidity control agent. It may be stored in Further, the sterilization package 11 may be omitted.
- the refractive index of the sample by the Hg-e line was determined. The measurement was performed in a dry state (25 ° C.) and a water absorption state (35 ° C.).
- Glass transition temperature Tg
- compression load The sample was compressed at a compression rate of 5.0 mm / min in an environment of 23 ° C. and 50% RH, and the load when the distance between the jigs reached 3.0 mm was measured. In this measurement, a lens-shaped sample having a diameter of 6 mm and + 20D was used. Each sample was sealed in an aluminum package under the following Dry condition and Wet condition, and the above measurement was performed after the state of the sample was adjusted and stabilized. As for the Dry condition, a package insert (paper) having a water absorption rate of 0% by mass dried at 80 ° C. was enclosed in an aluminum package as a humidity control agent.
- Tables 2 and 3 collectively show sample contents and measurement results of Experimental Examples 1 to 23.
- Table 2 shows the molar fraction A of the hydrophilic monomer, the molar fraction B of the crosslinkable monomer, the A ⁇ B value, the water absorption (mass%), the number of greases, the refractive index ne, Tg of the dry state and the water absorption state. (° C.) and elongation (%) are summarized. The number of greases is shown by separating the values of three samples with “/”.
- Table 3 summarizes the compression load (mN) of the A ⁇ B value, the Dry state, and the Wet state. As shown in Table 2, the water absorption rate of each sample was in the range of 1.7 to 4.5% by mass.
- the types and contents of the hydrophilic monomer and the crosslinkable monomer are different (Table 1), but the refractive index n is almost the same between the dry state and the water absorption state, and is a value of 1.5 or more. It was found to have The difference in refractive index between the dry state and the water absorption state was less than 0.010 even when the water absorption rate was high.
- the crosslinkable monomer when the crosslinkable monomer is 4 parts by mass or more (molar fraction 2.3 ⁇ 10 ⁇ 2 or more) with respect to 100 parts by mass of the main component, the elongation is less than 290%, whereas 3 parts by mass. It was found that the elongation rate exceeded 290% by reducing it to (a molar fraction of 1.7 ⁇ 10 ⁇ 2 or less). Further, it was found that when the hydrophilic monomer is DMAA or NVP, and when the crosslinkable monomer is EDMA, the flexibility becomes low as shown in Tg of Table 2 and compression load of Table 3. Tg affects the performance when the lens is folded and opened in the eye, and is preferably 20 ° C. or lower.
- the combination of the hydrophilic monomer HEMA and the crosslinkable monomer BDDA is more suitable as an intraocular lens material.
- Table 3 even if the material has a high compressive load value in the dry state or does not bend, if the moisture-adjusting material is properly enclosed and the water absorption state of the lens material is adjusted, the compressive load value is It turned out to be reduced or bend. Therefore, it has been found that even a material that is relatively difficult to bend in a dry state can be used as an intraocular lens material if it is circulated in an effort to maintain an appropriate amount of moisture (humidity).
- the present invention can be used for applications related to intraocular lenses.
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Abstract
Description
実験例で用いた化合物の略称を以下に示す。
<主成分>
POEA:2-フェノキシエチルアクリレート 分子量 192.21
EA :エチルアクリレート 分子量 100.12
<親水性モノマー>
HEMA:2-ヒドロキシエチルメタクリレート 分子量 130.15
DMAA:N,N-ジメチルアクリルアミド 分子量 99.14
NVP :N-ビニル-2-ピロリドン 分子量 111.14
<架橋性モノマー>
BDDA:1,4-ブタンジオールジアクリレート 分子量 198.22
EDMA:エチレングリコールジメタクリレート 分子量 198.22
表1に示す重合成分、及び重合開始剤として2,2’-アゾビス(2,4-ジメチルバレロニトリル)を、主成分100質量部に対して0.5質量部混合し、これを所望の形状の鋳型内に注入した。この鋳型を80℃のオーブン中に入れて40分間にわたって加熱重合成形を行った。得られた重合体を鋳型から脱型し、溶出処理を行った後、60℃で2日間乾燥させ、眼内レンズ用材料を得た。
(吸水率)
25℃における平衡含水状態及び乾燥状態での試料の質量を測定し、吸水率(質量%)を算出した。吸水率は、25℃における平衡含水状態での試料の質量W、乾燥状態での試料の質量W0とにより、次式より算出した。
吸水率(質量%)=(W-W0)/W0)×100
試料を35℃の水中に24時間浸漬し、次いで25℃の水中に2時間浸漬した後、実体顕微鏡にて外観を観察した。外観の観察は、1種の試料につき3検体行い、グリスニング(白い輝点)の発生個数を調べた。この測定では、直径6mm、+20Dのレンズ形状の試料を使用した。
試料のHg-e線による屈折率を求めた。乾燥状態(25℃)及び吸水状態(35℃)で測定した。
示差走査熱量測定により、-30~70℃、昇温速度を20℃/分として測定した。この測定により、中間点ガラス転移温度を求めた。
全長(L0)20mm、平行部長さ(L)6mm、平行部幅(W)1.5mm、厚さ0.8mmのダンベル形状の試験片(図2参照)を用いて測定した。25℃の恒温水に試料を浸漬して1分間静置した後、100mm/分の速度で破断するまで引っ張った。ソフトウェアを用いて、最大荷重時の歪み(=伸び率(%))を出力した。
23℃、50%RHの環境下にて、圧縮速度5.0mm/分で試料を圧縮し、治具間距離が3.0mmに達したときの荷重を測定した。この測定では、直径6mm、+20Dのレンズ形状の試料を使用した。各試料は、下記Dry条件、及びWet条件でアルミ包装内に密閉し、試料の状態を調節して安定したのち上記測定を行った。Dry条件は、80℃で乾燥させた吸水率0質量%の添付文書(紙)を調湿剤としてアルミ包装内へ同封した。Wet条件は、実験例1、3、5、6、10、11については、23℃、50%RHで調湿した吸水率5.1%の添付文書(紙)を調湿剤としてアルミ包装内へ同封した。また、実験例15、16、20のWet条件は、含水率65.0質量%のポリマー(ソフトコンタクトレンズ材)を調湿剤としてアルミ包装内へ同封した。
実験例1~23の試料内容、測定結果を表2、3にまとめて示す。表2には、親水性モノマーのモル分率A、架橋性モノマーのモル分率B、A×B値、吸水率(質量%)、グリスニング個数、乾燥状態及び吸水状態の屈折率ne、Tg(℃)及び伸び率(%)をまとめた。グリスニング個数は、3検体の値をそれぞれ「/」で区切って示した。また、表3には、A×B値、Dry状態及びWet状態の圧縮荷重(mN)をまとめた。表2に示すように、各試料の吸水率は、1.7~4.5質量%の範囲であった。また、各試料において、親水性モノマーのモル分率×架橋性モノマーのモル分率の値(A×B値)が2.1×10-3以下の場合、グリスニングが多く発生する傾向が認められた。一方、A×B値が2.1×10-3を超える場合、特に、A×B値が2.2×10-3以上の場合、グリスニングが発生しにくい傾向が認められた。なお、ここでは、3検体のグリスニング発生個数の平均が5以下であるときに、グリスニングが発生しにくいと評価した。また、各試料において、親水性モノマー及び架橋性モノマーの種類及び含有量が異なるものとしたが(表1)、屈折率nは、乾燥状態及び吸水状態でほぼ変わらず、1.5以上の値を有することがわかった。乾燥状態と吸水状態の屈折率の差は、吸水率が高くても0.010未満であった。
Claims (7)
- 親水性モノマー及び架橋性モノマーを含有した重合性組成物を重合した重合体からなり、前記親水性モノマーのモル分率Aと前記架橋性モノマーのモル分率Bとの積であるA×B値が2.1×10-3を超え、3.6×10-3未満であり、前記架橋性モノマーのモル分率Bが2.4×10-2未満であり、水和された状態での前記重合体の屈折率nが1.5以上である、眼内レンズ用材料。
- 前記架橋性モノマーのモル分率Bが2.1×10-2未満である、請求項1に記載の眼内レンズ用材料。
- 伸び率が290%以上である、請求項1又は2に記載の眼内レンズ用材料。
- 前記親水性モノマーは、アルキル基の炭素数が1~20の水酸基含有アルキル(メタ)アクリレート、(メタ)アクリルアミドモノマー及びN-ビニルラクタムのうち1以上を含む、請求項1~3のいずれか1項に記載の眼内レンズ用材料。
- 前記架橋性モノマーは、ブタンジオールジ(メタ)アクリレート及びエチレングリコールジ(メタ)アクリレートのうち1以上を含む、請求項1~4のいずれか1項に記載の眼内レンズ用材料。
- 前記重合性組成物は、主成分として、芳香族環含有(メタ)アクリレート及びアルキル基の炭素数が1~20のアルキル(メタ)アクリレートを含む、請求項1~5のいずれか1項に記載の眼内レンズ用材料。
- 眼内レンズ用材料の保存方法であって、
請求項1~6のいずれか1項に記載の眼内レンズ用材料と、水分を含有する調湿材と、を防湿パッケージ内に同封する、
眼内レンズ用材料の保存方法。
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JP2016572096A JPWO2016121804A1 (ja) | 2015-01-29 | 2016-01-27 | 眼内レンズ用材料及び眼内レンズ用材料の保存方法 |
EP16743407.5A EP3251703A4 (en) | 2015-01-29 | 2016-01-27 | Material for intraocular lenses and method for preserving material for intraocular lenses |
US15/541,076 US20180021475A1 (en) | 2015-01-29 | 2016-01-27 | Intraocular lens material and method for preserving intraocular lens material |
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WO2019150490A1 (ja) * | 2018-01-31 | 2019-08-08 | 株式会社メニコン | 眼内レンズ用材料 |
WO2020138346A1 (ja) | 2018-12-28 | 2020-07-02 | 株式会社ニデック | 軟質眼内レンズ材料および軟質眼内レンズ |
RU2776808C2 (ru) * | 2018-01-31 | 2022-07-26 | Меникон Ко., Лтд. | Интраокулярная линза |
Families Citing this family (1)
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CN118000966A (zh) * | 2022-08-23 | 2024-05-10 | 哈尼塔镜片公司 | 用于疏水性人工晶状体的无菌湿润包装和包装方法 |
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- 2016-01-27 US US15/541,076 patent/US20180021475A1/en not_active Abandoned
- 2016-01-27 WO PCT/JP2016/052293 patent/WO2016121804A1/ja active Application Filing
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WO2019150490A1 (ja) * | 2018-01-31 | 2019-08-08 | 株式会社メニコン | 眼内レンズ用材料 |
CN111542348A (zh) * | 2018-01-31 | 2020-08-14 | 株式会社目立康 | 人工晶状体用材料 |
RU2760281C1 (ru) * | 2018-01-31 | 2021-11-23 | Меникон Ко., Лтд. | Материал для интраокулярной линзы |
RU2776808C2 (ru) * | 2018-01-31 | 2022-07-26 | Меникон Ко., Лтд. | Интраокулярная линза |
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JP7336064B2 (ja) | 2018-12-28 | 2023-08-31 | 株式会社ニデック | 軟質眼内レンズ材料および軟質眼内レンズ |
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EP3251703A4 (en) | 2018-08-08 |
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EP3251703A1 (en) | 2017-12-06 |
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