JP2935118B2 - Contact lens materials and contact lenses - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a contact lens excellent in oxygen permeability and the like and a material thereof.

<Prior Art> At present, as a generally used contact lens, an oxygen-permeable (hereinafter abbreviated as GP) hard contact lens and a water-containing soft contact lens are known. Although the water-containing soft contact lens is excellent in wearing feeling, the oxygen permeability of the material is insufficient. Therefore, it is conceivable to increase the moisture content of the material in order to increase the oxygen permeability, but clinical results have been reported that it is easy to be contaminated by various bacteria and cause serious complications to the cornea and conjunctiva. I have. On the other hand, GP hard contact lenses are highly evaluated in terms of high oxygen permeability, effect of correcting astigmatism, durability and safety, and are becoming the mainstream of contact lenses. Along with this, research on GP hard contact lenses has also been actively conducted, but in each of the above GP contact lenses, only oxygen permeability is pursued, and in fact, other properties required as contact lenses are not sufficient. .

For example, the contact lenses described in JP-B-62-8769, JP-B-62-61928 and JP-B-63-36646 have good oxygen permeability, but have problems in shape stability and stain resistance. is there. On the other hand, dialkyl fumarate used in JP-A-62-99720 and JP-A-62-212618 has poor copolymerizability and even if copolymerization is possible,
It is very brittle and easily breaks and is dangerous. In addition,
The contact lens disclosed in JP-A-61-176909 has a low oxygen permeability and cannot be used for continuous wearing, which has recently attracted particular attention.

<Problems to be solved by the invention> An object of the present invention is to provide an excellent visual acuity correcting effect, have oxygen permeability that allows long-term continuous wearing, and have shape stability and stain resistance.
An object of the present invention is to provide a contact lens excellent in durability and the like and a material thereof.

<Means for Solving the Problems> According to the present invention, general formula (I) (Wherein R ₁ and R ₂ are the same or different groups and R ₁ and
At least one of groups R ₂ is a straight or branched fluoroalkyl group represented by _{-C h H k F 2h + 1} -k, h is 2 to 18 integer, k is 1 (2 represents an integer of × h), and if only one is _{-C h H k F 2h + 1} -k, the other carbon atoms 1 to 1
An alkyl group, an alkenyl group having 2 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms), and 10 to 70% by weight of a fluorine-containing compound A represented by the general formula (II): (Wherein R ₃ and R ₄ are the same as R ₁ and R _{2 in} the general formula (I)). A monomer material containing 10 to 70% by weight of a fluorine-containing compound B represented by the following formula as an essential monomer component is copolymerized. There is provided a contact lens material characterized by the fact that:

Further, according to the present invention, there is provided a contact lens using the above-mentioned contact lens material.

 Hereinafter, the present invention will be described in detail.

The contact lens material of the present invention is a copolymer obtained by copolymerizing a specific fluorine-containing compound A and a specific fluorine-containing compound B as essential monomer components.

The fluorine-containing compound A used in the present invention can be represented by the following general formula (I): Wherein R ₁ and R ₂ are the same or different groups, and R ₁ and
It represents a linear or branched fluoroalkyl group at least one group of R ₂ is represented by _{-C h H k F 2h + 1} -k, h 2
To 18 integer, k is an integer of 1~ (2 × h), and if only one is _{-C h H k F 2h + 1} -k, the other is C1-12
An alkyl group, an alkenyl group having 2 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms. In this case, if h is 19 or more and the number of carbon atoms of the alkyl group, alkenyl group and cycloalkyl group is 13 or more, the production becomes difficult and thus cannot be used. Examples of the fluorine-containing compound A represented by the general formula (I) include methyl-2,2,2-trifluoroethyl fumarate and allyl (2,2,2-trifluoro-1).
-Trifluoromethyl) ethyl fumarate, allyl-3,
3,4,4,5,5,6,6,6-nonafluorohexyl fumarate,
Isopropyl-2,2,2-trifluoroethyl fumarate, isopropyl (2,2,2-trifluoro-1-trifluoromethyl) ethyl fumarate, isopropyl-3,3,
4,4,4-pentafluorobutyl fumarate, isopropyl-2,2,3,3,4,4,5,5-octafluoropentyl fumarate, isopropyl-3,3,4,4,5,5, 6,6,6-nonafluorohexyl fumarate, isopropyl-1,1,2,2-tetrahydroperfluorooctyl fumarate, isopropyl-1,1,2,2-tetrahydroperfluorodecyl fumarate, isopropyl-2, 2,3,3-tetrafluoropropyl fumarate, isopropyl-2,2,3,3,4,4,5,5-octafluoropentyl fumarate, tert-butyl (2,
2,2-trifluoromethyl) ethyl fumarate, tertiary butyl-3,3,4,4,4-pentafluorobutyl fumarate, tertiary butyl (1,1,2,2-tetrahydroperfluoro) decyl fumarate, Tert-butyl-2,2,
3,3-tetrafluoropropyl fumarate, tert-butyl-2,2,3,3,4,4,5,5-octafluoropentyl fumarate, tert-butyl-1,1,2,2-tetrahydroper Fluorodecyl fumarate, 2-ethylhexyl (2,2,2-trifluoroethyl) fumarate, 2-ethylhexyl (2,2,2-trifluoro-1-trifluoromethyl) ethyl fumarate, 2-ethylhexyl (1, 1,
2,2-tetrahydroperfluoro) octyl fumarate, cyclohexyl-2,2,2-trifluoroethyl fumarate, cyclohexyl (2,2,2-trifluoro-1-)
(Trifluoromethyl) ethyl fumarate, cyclohexyl-3,3,4,4,4-pentafluorobutyl fumarate, bis (2,2,2-trifluoroethyl) fumarate, bis (2,2,2-trifluoro) -1-trifluoromethylethyl) fumarate, bis (3,3,4,4,4-pentafluorobutyl) fumarate, bis (3,3,4,4,5,5,6,6,6-nonafluoro Hexyl) fumarate, bis (1,1,2,2-tetrahydroperfluorooctyl) fumarate, bis (1,1,
2,2, -tetrahydroperfluorodecyl) fumarate,
2,2,2-trifluoroethyl (2,2,2-trifluoro-1
-Trifluoromethyl) ethyl fumarate, (2,2,2-
Trifluoro-1-trifluoromethyl) ethyl-3,3,
4,4,5,5,6,6,6-nonafluorohexyl fumarate,
Fumarate such as (2,2,2-trifluoro-1-trifluoromethyl) ethyl-1,1,2,2-tetrafluoroperfluorodecyl fumarate or a corresponding malate can be mentioned. Can be used alone or as a mixture. At this time, the fluorine-containing compound may be either a cis-form or a trans-form. However, from the viewpoint of homopolymerizability and copolymerizability, the fumarate method which is a trans-form is preferred.

The fluorine compound B used in the present invention has the following general formula (I)
I) In the formula, R ₃ and R ₄ are the same as R ₁ and R ₂ in the general formula (I).

Examples of the fluorine-containing compound B represented by the general formula (II) include bis (2,2,2-trifluoroethyl) itaconate and bis (2,2,2-trifluoro-1-trifluoromethylethyl) itaconate , Screws (3,3,4,4,5,5,6,
6,6-nonafluorohexyl) itaconate, isopropyl-2,2,2-trifluoroethylitaconate, bis (2,2,2-trifluoro-1-trifluoromethyl) itaconate, bis (3,3,4 , 4,4-pentafluorobutyl) itaconate, bis (2,2,3,3,4,4,5,5-octafluoropentyl) itaconate, bis (1,1,2,2-tetrahydroperfluorooctyl) Itaconate, bis (1,1,2,2-tetrahydroperfluorodecyl) itaconate, bis (3,3,4,4,5,5,6,6,7,7,8,8,9,9,10 , 10,10
-Heptadecafluorodecyl) itaconate, bis (2,
2,3,3-tetrafluoropropyl) itaconate, bis (2,2,2-trifluoromethyl) itaconate, methyl-2,2,2-trifluoroethylitaconate, allyl (2,2,2
-Trifluoro-1-trifluoromethyl) ethyl itaconate, allyl-3,3,4,4,5,5,6,6,6-nonafluorohexylitaconate, isopropyl-2,2,2-trifluoro Ethyl itaconate, isopropyl (2,2,2-trifluoro-1-trifluoromethyl) ethyl itaconate, isopropyl-3,3,4,4,4-pentafluorobutyl itaconate, isopropyl-2,2,3 , 3,4,4,5,5-octafluoropentyl itaconate, isopropyl-3,
3,4,4,5,5,6,6,6-nonafluorohexylitaconate, isopropyl-1,1,2,2-tetrahydroperfluorooctylitaconate, isopropyl-1,1,2,2-tetrahydro Perfluorodecyl itaconate, isopropyl-3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl itaconate, isopropyl −2,2,
3,3-tetrafluoropropyl itaconate, isopropyl-2,2,3,3,4,4,5,5-octafluoropentyl itaconate, isopropyl-3,3,4,4,5,5,6, 6,7,7,8,8,9,
9,10,10,10-heptadecafluorodecyl itaconate,
Tertiary butyl-2,2,2-trifluoromethylethyl itaconate, tertiary butyl-3,3,4,4,4-pentafluorobutyl itaconate, tertiary butyl-1,1,
2,2-tetrahydroperfluorodecyl itaconate,
Tert-butyl-2,2,3,3-tetrafluoropropylitaconate, tert-butyl-2,2,3,3,4,4,5,5-
Octafluoropentyl itaconate, tertiary butyl-3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl itaconate And the like,
When used, they can be used alone or as a mixture.

In the present invention, the content ratio of the fluorine-containing compounds A and B represented by the general formulas (I) and (II), which are essential monomer components, is such that the fluorine-containing compound A is 10 to 70% by weight based on all monomers. Preferably, the content of the fluorine-containing compound B is in the range of 10 to 70% by weight. At this time, the total amount of the fluorine-containing compounds A and B is at most 100% by weight. When the content ratio of the fluorine-containing compound A is less than 10% by weight, the oxygen permeability coefficient decreases, and when it exceeds 70% by weight,
It is not preferable because the strength as a contact lens cannot be maintained. If the content of the fluorine-containing compound B is less than 10% by weight, the oxygen permeation coefficient decreases, and if it exceeds 70% by weight, water repellency increases, which is not preferable.

In the contact lens material of the present invention, in addition to the monomers of the fluorine-containing compounds A and B, for example, other radically polymerizable vinyl monomers, silicon-containing vinyl monomers,
A monomer selected from the group consisting of crosslinkable polyfunctional vinyl monomers and mixtures thereof can be used.
Examples of the radical polymerizable vinyl monomer, silicon-containing vinyl monomer and crosslinkable polyfunctional vinyl monomer include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, tertiary butyl (meth) acrylate, cyclohexyl ( (Meth) acrylate, benzyl (meth) acrylate, styrene, p-methylenestyrene, p-chlorostyrene,
o-chlorostyrene, divinylbenzene, vinyl acetate,
Vinyl propionate, vinyl pivalate, vinyl (meth) acrylate, 2,2,2-trifluoroethyl (meth) acrylate, ethyl vinyl ether, n-butyl vinyl ether, (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, N-vinylpyrrolidone, vinylpyridine, allyl (meth) acrylate,
Trimethylsilylmethyl (meth) acrylate, pentamethyldisiloxanylmethyl (meth) acrylate, methylbis (trimethylsiloxin) silylmethyl (meth)
Acrylate, tris (trimethylsiloxy) silylmethyl (meth) acrylate, tris (pentamethyldisiloxanyloxy) silylmethyl (meth) acrylate, trimethylsilylethyl (meth) acrylate, pentamethyldisiloxanylethyl (meth) acrylate, methylbis ( Trimethylsiloxy) silylethyl (meth) acrylate, tris (trimethylsiloxy)
Silylethyl (meth) acrylate, tris (pentamethyldisiloxanyloxy) silylethyl (meth) acrylate, trimethylsilylpropyl (meth) acrylate, pentamethyldisiloxanyl (meth) acrylate, methylbis (trimethylsiloxy) silylpropyl (meth) Acrylate, tris (trimethylsiloxy)
Silylpropyl (meth) acrylate, tris (pentamethyldisiloxanyloxy) silylpropyl (meth)
Acrylate, methylbis (trimethylsiloxy) silylethylglycerol mono (meth) acrylate, tris (trimethylsiloxy) silylethylglycerol mono (meth) acrylate, tris (pentamethyldisiloxanyloxy) silylethylglycerol mono (meth) acrylate, methylbis (Trimethylsiloxy)
Silylpropyl glycerol mono (meth) acrylate, tris (trimethylsiloxy) silylglycerol mono (meth) acrylate, tris (pentamethyldisiloxanyloxy) silylpropylglycerol mono (meth) acrylate, dimethyl (triphenylsiloxy) silylpropyl ( (Meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, diallyl phthalate, diallyl isofumarate, diallyl terephthalate, diethylene glycol Bisallyl carbonate, triallyl trimellitate, triallyl cyanurate, methacrylic acid, acrylic acid, itaconic acid, etc. You can gel, In use, the use alone or in combination, can improve the thermal stability of the resulting contact lenses, mechanical strength, processability. The compounding ratio of the radically polymerizable vinyl monomer or the crosslinkable polyfunctional vinyl monomer is preferably 0.1 to 65% by weight, more preferably 10 to 65% by weight, based on all the monomers including the components of the fluorine-containing compounds A and B. Is preferable. If the amount is less than 0.1% by weight, thermal stability, mechanical strength and workability due to copolymerization may not be sufficiently obtained. If the amount exceeds 65% by weight, the oxygen permeability of the contact lens is significantly reduced. It is not preferable.

The contact lens of the present invention preferably has a DK value of 6 to 12 × 10 ^-10 ml · cm / cm ² · sec · mmHg, particularly 7 to 11 × 10 ^-10 ml · cm / g in order to provide excellent oxygen permeability. cm ² · sec · mmHg is desirable. At this time, oxygen permeability is insufficient for long-term continuous use at less than 6 × 10 ^-10 ml · cm / cm ² · sec · mmHg, and 12 × 10 ^-10 ml · cm / cm ² · sec · mmHg Exceeding the range is not preferred because physical properties such as the strength of the contact lens are reduced.

In order to prepare a contact lens in the present invention, a known preparation method can be used. Specifically, for example, a monomer material containing a polymerization initiator is polymerized or copolymerized in a suitable container such as a test tube, and a round bar or a block of the contact lens material of the present invention is obtained. By machining, the method of processing the contact lens according to the prescription, the method of injecting the monomer containing the polymerization initiator into the space made by one mold and directly molding the contact lens by mold polymerization or the radical polymerization method in advance After producing the contact lens material of the present invention, a method of dissolving it in an appropriate solvent and removing the solvent by a casting method or the like to obtain a contact lens can be mentioned.
In the above-mentioned preparation method, as the polymerization initiator preferably used when polymerizing the monomer, one or two or more of a group consisting of an organic peroxide and an azo compound having a selected 10-hour half-life temperature of 120 ° C. or less are used. You can choose more. Examples of the organic peroxide or azo compound include benzoyl peroxide, diisopropyl peroxydicarbonate, t-butylperoxy-2-ethylhexanoate, t-butylperoxypivalate, t-butylperoxydiisobutyrate , Lauroyl peroxide, azobisisobutyronitrile, azobis (2,4-dimethylvaleronitrile), t-butylperoxyisopropyl carbonate and the like. The amount of the polymerization initiator used is preferably 10 parts by weight or less, more preferably 5 parts by weight or less, based on 100 parts by weight of the raw material monomer.

Further, in the above-mentioned preparation method, the conditions for copolymerizing each monomer may be appropriately replaced with a polymerization system with an inert gas, for example, nitrogen, carbon dioxide, helium, or the like, or copolymerized under an atmosphere or under degassing conditions. preferable. Further, the temperature at the time of copolymerization varies depending on the type of polymerization initiator used, but is preferably in the range of 30 to 120 ° C. The total time required for the polymerization is desirably about 10 to 72 hours.

It is also possible to add a coloring agent such as a dye or an additive such as an ultraviolet absorber to the raw material monomer to carry out polymerization.

In the present invention, the contact lens obtained by the above preparation method can be subjected to surface modification by performing an acid or alkali treatment or a low-temperature plasma treatment.
The feeling of wearing can also be improved by performing graft copolymerization of a hydrophilic monomer by low-temperature plasma treatment.

<Effect of the Invention> The contact lens material of the present invention has a high oxygen permeability because it is composed of a copolymer containing two kinds of fluorine-containing compounds A and B having a saturated fluorine alkyl group as essential components as described above. Further, it is possible to provide a contact lens which can prevent deposition of proteins, lipids and inorganic substances on the surface, has excellent shape stability, and has excellent durability. Therefore, it is extremely useful for long-term continuous wearing contact lenses and the like.

<Examples> Hereinafter, the present invention will be described in more detail with reference to Examples.
The present invention is not limited to these.

 The middle part in the examples indicates parts by weight.

Example 1 35 parts of isopropyl (2,2,2-trifluoro-1-trifluoromethyl) ethyl fumarate, bis (2,2,2-trifluoro-1-trifluoroethyl) itaconate 35
Parts, 20 parts of ethyl methacrylate, 5 parts of allyl methacrylate, and 5 parts of methacrylic acid, mixed with 1.5 parts of azobis (2,4-dimethylvaleronitrile), and the resulting mixture was placed in a glass sealed tube, and the inside was replaced with nitrogen. Then, degassing was repeated and sealing was performed under vacuum. This sealed tube was left standing for polymerization in a constant temperature bath at 70 ° C. for 24 hours, and further heated at 100 ° C. for 2 hours. The resulting mixture was cut, polished and polished to form contact lenses. Next, various physical properties of the obtained contact lens were measured by the following methods. Table 1 shows the types and amounts of the monomer and the polymerization initiator, and Table 2 shows the measurement results.

Oxygen permeability coefficient Xertex Corporatio
n) DK value (ml · cm / cm ² · sec · mmHg) of a test piece having a diameter of 12.7 mm and a thickness of 0.2 mm in a 0.9% physiological saline solution at 35 ° C. using a trade name “MODEL 2110” manufactured by the company. ).

12.7mm diameter, thickness in 0.2% egg white lysozyme aqueous solution
A 0.2 mm test piece was immersed at 37 ° C. for 24 hours, and the change in absorbance at 280 nm was measured to determine the amount of the attached lysozyme aqueous solution.

Vickers hardness (HV) It was measured using a Terasawa MM-2 type ultra-micro hardness tester manufactured by Taiyo Tester Co., Ltd.

Mechanical Strength (Bending Stress; Elastic Modulus) A separately sampled flat plate sample having a thickness of 2 mm, a length of 50 mm, and a width of 10 mm was measured in accordance with JIS K7203 hard plastic bending test method.

Examples 2 to 5 and Comparative Examples 1 to 3 In the same manner as in Example 1, raw material monomers having various compositions shown in Table 1 were cured under the radical polymerization initiator and polymerization conditions shown in Table 1, and then contact lenses were obtained. Was prepared and various physical properties were measured. Table 1 shows the monomer mixing ratio, and Table 2 shows the measurement results.

From the results shown in Table 2, it was found that the contact lens of the present invention was remarkably excellent in oxygen permeability and excellent in stain resistance and the like.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuyoshi Miyazaki 2-17-1 Kasuga, Tsukuba, Ibaraki Prefecture (72) Inventor Satoshi Kubota 3-3-5 Yamato, Suwa City, Nagano Prefecture Inside Seiko Epson Corporation (72 ) Inventor Atsushi Kawashima 3-5-5 Yamato, Suwa-shi, Nagano Seiko Epson Corporation (72) Inventor Yu Yu 3-3-5 Yamato, Suwa-shi, Nagano Prefecture Inside Seiko Epson Corporation (56) Reference Document JP-A-63-132216 (JP, A) JP-A-62-92914 (JP, A) JP-A-63-210115 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G02C 7/04

Claims (2)

(57) [Claims] 1. The compound of the general formula (I) (Wherein R ₁ and R ₂ are the same or different groups and R ₁ and
At least one of groups R ₂ is a straight or branched fluoroalkyl group represented by _{-C h H k F 2h + 1} -k, h is 2 to 18 integer, k is 1 (2 represents an integer of × h), and if only one is _{-C h H k F 2h + 1} -k, the other carbon atoms 1 to 1
An alkyl group, an alkenyl group having 2 to 12 carbon atoms or a cycloalkyl group having 3 to 12 carbon atoms), and 10 to 70% by weight of a fluorine-containing compound A represented by the general formula (II): (Wherein R ₃ and R ₄ are the same or different groups and R ₃ and R
At least one group of R ₄ is a straight or branched fluoroalkyl group represented by _{-C h H k F 2h + 1} -k, h is 2 to 18 integer, k is 1 (2 represents an integer of × h), and if only one is _{-C h H k F 2h + 1} -k, the other carbon atoms 1 to 1
2) an alkyl group, an alkenyl group having 2 to 12 carbon atoms, or a cycloalkyl group having 3 to 12 carbon atoms). A contact lens material characterized by being formed by: 2. A contact lens comprising the contact lens material according to claim 1.