EP0896685A1 - Compositions pour lentilles de contact photochromiques organiques - Google Patents

Compositions pour lentilles de contact photochromiques organiques

Info

Publication number
EP0896685A1
EP0896685A1 EP97918785A EP97918785A EP0896685A1 EP 0896685 A1 EP0896685 A1 EP 0896685A1 EP 97918785 A EP97918785 A EP 97918785A EP 97918785 A EP97918785 A EP 97918785A EP 0896685 A1 EP0896685 A1 EP 0896685A1
Authority
EP
European Patent Office
Prior art keywords
photochromic
contact lens
group
general formula
photochromic contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97918785A
Other languages
German (de)
English (en)
Other versions
EP0896685A4 (fr
Inventor
Norman E. Garrity
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Inc
Original Assignee
Corning Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Corning Inc filed Critical Corning Inc
Publication of EP0896685A1 publication Critical patent/EP0896685A1/fr
Publication of EP0896685A4 publication Critical patent/EP0896685A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/23—Photochromic filters

Definitions

  • the invention relates to photochromic organic contact lenses.
  • a photochromic material which can be used in the production of a contact lens whose transmittance varies as a function of light.
  • photochromic properties i.e., colorability, rapid darkening and lightening kinetics, acceptable durability, etc.
  • such lenses are generally made by the use of appropriate mixtures of photochromic compounds.
  • the polymer matrix used for such lenses are thermally crosslinked, they tend to have a low glass transition point, generally lower than that of CR39 ® , a reference ophthalmic resin consisting of diethylene glycol bis(aUyl carbonate) available from PPG Industries, in order to exhibit rapid photochromic kinetics.
  • these polymers generally have a relatively low refractive index (below 1.54).
  • the invention is directed at organic photochromic contact lenses, in particular, a plastic contact lens.
  • the lens is composed of (1) a polymer matrix of high optical quality, and (2) at least one dye capable of imparting photochromic properties on the lens.
  • a photochromic contact lens comprising organic photochromic materials consisting of a transparent polymer having a refractive index equal to at least 1.54, and at least one photochromic dye selected from the group consisting of spirooxazines, spiropyrans, chromenes and a mixture of these, wherein the polymer is a copolymer of at least two monomers selected from the group consisting of: (i) homopolymers of ethoxylated bisphenol A dimethylacrylate with formula I:
  • R is H or CH 3 , and m and n independently represent 1 or 2; (ii) ethoxylated bisphenol A dimethylacrylate containing at most 30 weight percent of an aromatic monomer with vinyl, acrylic or methoacrylic functionality;
  • the invention relates to a photochromic contact lens in which the polymer is a comonomer selected from the group consisting of divinylbenzene, diallyl phthalate, benzyl methacrylate, benzyl acrylate, naphthyl methacrylate and naphthyl acrylate, and their derivatives substituted on the aromatic nuclei by chlorine or bromine atoms.
  • the polymer is a comonomer selected from the group consisting of divinylbenzene, diallyl phthalate, benzyl methacrylate, benzyl acrylate, naphthyl methacrylate and naphthyl acrylate, and their derivatives substituted on the aromatic nuclei by chlorine or bromine atoms.
  • the organic photochromic contact lens of the invention can be either hard or soft, and can be prepared from inventive organic photochromic materials having properties appropriate for contact lens applications such as, surface wettability, oxygen permeability, and suitable hydrophilic properties. It is also desirable that the photochromic dyes have the proper solubility, dispersability and stability for contact lens applications in order to obtain consistent or uniform photochromicity.
  • the lens is made of a plastic host (polymer matrix), a photochromic compound or a mixture of photochromic compounds, and optionally, a stabilizer.
  • the polymer matrix of the inventive contact lens can be thermally crosslinked, free of optical distortion, and is able to receive, and be cross-linked in the presence of an appropriate mixture of photochromic dyes.
  • the resulting lens exhibits a high initial transmission before exposure as well as a high capacity to rapidly darken after exposure. Also, the lens rapidly lighten when the light source is eliminated.
  • the material has a low thermal dependence, a high resistance to fatigue, and a high index of refraction. In a preferred embodiment, the index of refraction is at least 1.54, more preferably, at least 1.55.
  • Examples of useful organic photochromic materials for the contact lens for the invention include the compositions disclosed in co-assigned, U.S. provisional patent application serial no. 60/000,829, titled “Temperature Stable and Sunlight Protected Photochromic Articles,” by Florent et al. (Florent I); U.S. provisional application serial no.
  • the organic materials are composed of a plastic host, photochromic compounds, and a stabilizer.
  • useful hosts polymer matrix
  • photochromic compounds for the invention are discussed below.
  • Florent I discloses transparent organic photochromic materials having high refractive index, formed from a polymer matrix, which matrix can consist of a homopolymer of ethoxylated bisphenol A dimethacrylate having the formula I.
  • R H or CH 3
  • m and n independently represent 1 or 2, and where optionally, the dimethacrylate is modified up to 30 wt% with an aromatic comonomer with vinyl, acrylic or methacrylic functionality, and where the material contains at least one dye that imparts photochromic properties to the matrix, the dye being selected from spirooxazines, spiropyrans and chromenes.
  • These materials can be prepared by polymerizing a methoxylated bisphenol A dimethacrylate having formula I, optionally in the presence of one or more aromatic monomers with vinyl, acrylic or methacrylic functionality, in the presence of a diazo radical initiator, such as azobisisobutyronitrile, and in the absence of a peroxide radical initiator.
  • a diazo radical initiator such as azobisisobutyronitrile
  • Patent Nos. 5, 130,353; 5,185,390, and 5,180,254 for example
  • a substrate which is impregnated with one or more photochromic dye is applied to one side (usually the convex side in the case of a lens) of the polymer matrix, and the mixture is heated at 100-150° C for I to 3 hours, and finally the substrate is separated from the matrix.
  • the matrix of Florent I exhibits essentially constant photochromic characteristics.
  • the organic photochromic materials disclosed in Chan et al. is particularly useful in applications where it is desired to obtain contact lenses having adjustable photochromic properties.
  • Chan et al. disclose organic photochromic materials consisting of a polymer matrix with optical quality, having a refractive index of at least 1.54 and containing at least one dye that imparts photochromic properties to the matrix, the dye being selected from spirooxazines, spiropyrans and chromenes.
  • the polymer that constitutes the matrix is a copolymer consisting of (i) 30-95 wt% ethoxylated bisphenol A dimethacrylate having the following formula I:
  • Henry et al. disclose a transparent photochromic organic material having a refractive index greater than 1.55 and free of optical distortions, obtained by radical polymerization of a polymerizable composition containing: a) 80 to 95 wt% of at least one monomer represented by general formula (I):
  • R H or CH 3 , and m and n are independently 1 or 2;
  • R, H or CH 3 c) an effective quantity of at least one coloring agent giving the material photochromic properties, chosen from the group of the spiroxazines, spiropyrans and chromenes; d) an effective quantity of a chain transfer agent; and e) an effective quantity of a radical polymerization initiator; characterized by the fact that the chain transfer agent is a straight-chain alkanethiol, and the radical polymerization initiator is a diazoic compound, as well as a process for preparation of these photochromic materials and photochromic articles consisting of these materials.
  • the polymerizable composition of Chan et al. further incorporates, up to 10 wt% of an aromatic di vinyl monomer represented by the general formula (III):
  • R H or CH 3 .
  • Florent II discloses a new transparent organic material having a refractive index greater than 1.55 and which are free of optical distortions, characterized by the fact that they consist of a copolymer of: a) 55 to 90 and preferably 55 to 70 wt% of units derived from at least one monomer represented by general formula (I):
  • R H or CH 3 , and m and n are independently 1 or 2;
  • R, H or CH 3
  • R H or CH 3 ; d) 1 to 20 and preferably 5 to 15 wt% of units derived from at least one (meth)acrylic monomer corresponding to the general formula
  • (meth)acrylic means acrylic or methacrylic.
  • Optional constituent e) may be inco ⁇ orated in the polymerizable composition to obtain directly, after polymerization, a matrix with photochromic properties. It is also possible to produce a photochromic matrix by preparing a nonphotochromic matrix by polymerization, and then later giving it photochromic properties, for example, by diffusion of a photochromic coloring agent, as is well known in the art.
  • Monomers (a) of formula I are well known and are available commercially.
  • Styrene and methylstyrene are examples of monomers
  • Monomers (c) of formula III are represented by divinylbenzene and di(methylvinyl)benzene, for example.
  • the (meth)acrylic monomers (d) are also well-known products which are commercially available. Examples include, the butyl, pentyl, hexyl, heptyl, octyl, and 2-ethylhexyl (meth)acrylates, and ethyltriglycol (meth)acrylate.
  • the monomer (b) monomer (c) weight ratio in a dimethacrylic matrix as described, it is possible to adjust the kinetic parameters of the photochromic process to a desired value, without altering the optical quality of the materials obtained, while maintaining a high refractive index.
  • the inco ⁇ oration of the fourth monomer (d) in the proportions defined allows one to obtain more easily thick lenses which are free of optical defects (distortions, stresses, cords, etc.) without altering properties such as the glass transition temperature T g , the impact strength, or the refractive index.
  • the optional photochromic coloring agent (e) can be chosen from the general classes of the spiroxazines, spiropyrans and chromenes which have photochromic properties. Quite a few photochromic coloring agents of this type are described in the literature and are available commercially.
  • the refractive index of the photochromic material can be adjusted to a desired value by the use of an appropriate modifying co-monomer such as vinyl, acrylic or methacrylic compounds containing in their formulae, one or more benzene nuclei, for example, divinylbenzene, diallyl phthalate, benzyl methacrylate, benzyl acrylate, naphthyl methacrylate and naphthyl acrylate, and their derivatives substituted on the aromatic nuclei by chlorine or brimine atoms.
  • an appropriate modifying co-monomer such as vinyl, acrylic or methacrylic compounds containing in their formulae, one or more benzene nuclei, for example, divinylbenzene, diallyl phthalate, benzyl methacrylate, benzyl acrylate, naphthyl methacrylate and naphthyl acrylate, and their derivatives substituted on the aromatic nuclei by chlorine or brimine atoms.
  • Either one or a combination of photochromic components or coloring agents can be used to obtain a desired tint.
  • the total amount of coloring agents added to the matrix is in the range of 0.03 to 0.3 wt. %, more preferably, in the range of 0.05 to 0.1 wt. %.
  • useful photochromic coloring agents for the invention include:
  • photochromic dyes include:
  • Useful radical initiators are described in Polymer Handbook, by Bandrup and Immergut, p.II-2, John Wiley (1989), for example, azobisisobutyronitrile (AIBN) and 2-2'- azobis(2-methylbutyronitrile) (AMBN).
  • AIBN azobisisobutyronitrile
  • AMBN 2-2'- azobis(2-methylbutyronitrile)
  • Examples of useful chain transfer agents include, dodecanethiol (DDT).

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Eyeglasses (AREA)

Abstract

La présente invention concerne des lentilles de contact photochromiques organiques. Elle concerne en particulier une lentille de contact photochromique contenant des matières photochromiques organiques consistant en un polymère transparent dont l'indice de réfraction est au moins égal à 1,54, et au moins un colorant photochromique sélectionné dans le groupe composé de spiro-oxazines, de spiropyrannes, de chromènes et d'un mélange de ceux-ci.
EP97918785A 1996-04-30 1997-04-21 Compositions pour lentilles de contact photochromiques organiques Withdrawn EP0896685A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US1651796P 1996-04-30 1996-04-30
US16517P 1996-04-30
PCT/US1997/006776 WO1997041468A1 (fr) 1996-04-30 1997-04-21 Compositions pour lentilles de contact photochromiques organiques

Publications (2)

Publication Number Publication Date
EP0896685A1 true EP0896685A1 (fr) 1999-02-17
EP0896685A4 EP0896685A4 (fr) 2000-07-19

Family

ID=21777538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97918785A Withdrawn EP0896685A4 (fr) 1996-04-30 1997-04-21 Compositions pour lentilles de contact photochromiques organiques

Country Status (2)

Country Link
EP (1) EP0896685A4 (fr)
WO (1) WO1997041468A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797266B1 (fr) * 1999-08-02 2004-06-18 Essilor Int Procede de fabrication d'un materiau polymere reticule, transparent, hydrophile et photochromique, et article d'optique et ophtalmique obtenu
US6224945B1 (en) 1999-08-02 2001-05-01 Essilor International Compagnie Generale D'optique Process for the manufacture of a crosslinked, transparent, hydrophilic and photochromic polymeric material, and optical and ophthalmic articles obtained
AU770553B2 (en) * 1999-08-02 2004-02-26 Essilor International Compagnie Generale D'optique Process for the manufacture of a crosslinked, transparent, hydrophilic and photochromic polymeric material, and optical and ophthalmic article obtained
US20200339828A1 (en) * 2019-04-26 2020-10-29 Canon Kabushiki Kaisha Photocurable composition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817527B2 (ja) * 1978-07-17 1983-04-07 株式会社保谷レンズ 高屈折率レンズ用共重合体及びそれよりなるレンズ
JPS58113203A (ja) * 1981-12-28 1983-07-06 Nippon Kanko Shikiso Kenkyusho:Kk 光可逆変色性樹脂成形体の製造方法
JP3016533B2 (ja) * 1992-03-03 2000-03-06 株式会社トクヤマ フォトクロミック組成物
FR2699541B1 (fr) * 1992-12-22 1995-04-28 Essilor Int Compositions polymères à faible indice de jaune, compositions polymérisables et lentilles les mettant en Óoeuvre.
US5708064A (en) * 1993-10-15 1998-01-13 Ppg Industries, Inc. High refractive index photochromic ophthalmic article
FR2727971A1 (fr) * 1994-12-12 1996-06-14 Corning Inc Nouveaux materiaux organiques photochromiques a indice de refraction eleve, leur preparation et articles formes de ces materiaux
FR2728576A1 (fr) * 1994-12-22 1996-06-28 Corning Inc Materiaux organiques photochromiques a indice de refraction eleve et a proprietes ajustables, leur preparation et articles formes de ces materiaux

Also Published As

Publication number Publication date
EP0896685A4 (fr) 2000-07-19
WO1997041468A1 (fr) 1997-11-06

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