Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
  • G02B1/041—Lenses
  • G02B1/043—Contact lenses
• • 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
  • C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
  • C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
  • C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
  • C08F230/085—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
• • 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
  • C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
  • C08F220/282—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing two or more oxygen atoms
• • 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
  • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
  • C08F222/10—Esters
  • C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
  • C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate

Definitions

• the invention relates to novel hydrogels based on silicone-containing copolymers, processes for their preparation and their use as contact lens or intraocular lens material.
• hydrogels water-swellable crosslinked polymers
• polymers containing fluorine-containing structural units and those based on polysiloxanes are characterized by particularly high oxygen permeabilities.
• the water content of polymers which consist entirely or predominantly of the last two groups of substances low.
• the generally desirable high oxygen permeability is usually achieved in the known polymers that other serious disadvantages are accepted.
• high water content hydrogels normally have low mechanical stability, such as e.g. Tear resistance, on.
• polymers of silicones or fluorine-containing materials are highly hydrophobic and often have to be surface-treated in order to be used as contact lens material.
• the resulting hydrogels are advantageous in terms of oxygen permeability and water content.
• US-A-6018001 describes a process for producing contact lenses having a hydrophilic surface.
• a copolymer of a Glycerolketalmethacrylat and a siloxane-containing styrenic monomer (hydrophobic) is produced.
• the copolymer may further contain a hydrophilic monomer such as methacrylic acid and a crosslinking monomer such as ethylene glycol dimethacrylate.
• the hydrophobic contact lens material prepared from this copolymer is subjected to acid treatment for hydrophilization, whereby the glycerol ketal methacrylate is converted to the glycerol monomethacrylate.
• the invention relates to a hydrogel, which is a copolymer of a polymerizable monomer mixture containing a) 10-65 mol% of at least one hydrophobic vinyl monomer of the formula I.
• H 2 C C-COO-CH 2 (CHOH) P-CH 2 OH (J)
• R 1 is hydrogen or methyl
• p is an integer from 1 to 8 and wherein its hydroxyl groups are in protected form
• the proportion of the hydrophobic vinyl monomer a) of the formula I in the monomer mixture is preferably 15-60 mol% and more preferably 20-40 mol. It is important that the hydrophobic vinyl monomer a) is miscible with the silicone-containing monomer b).
• the vinyl monomer a) of the formula I can be derived from sugar alcohol and includes all conceivable position isomers. Examples of sugar alcohols from which compounds of the formula I are derived are xylitol, adonite, arabitol, sorbitol, mannitol or dulcitol.
• the hydroxy groups of the compounds of the formula I which are in protected form are protected by customary protective groups, preferably in pairs, as acid-labile ketals or in particular orthoesters, for example as addition products with an optionally substituted ester or ketone.
• Two hydroxy groups, which are jointly protected as ketal, are protected, for example, together with a preferably substituted methylene group, such as lower alkylidene, for example isopropylidene, cycloalkylidene, for example cyclohexylidene, or benzylidene.
• the protected vinyl monomer is preferably a) a compound of the formula (Ia)
• R 1 is hydrogen or methyl
• R 2 is hydrogen or an optionally substituted Ci-Cö-alkyl or phenyl group and R is an optionally substituted Ci-C ⁇ -alkyl, Ci-C ⁇ -alkoxy or phenyl group, or R 2 and R 3 together form a Cs-Cs-cycloalkyl radical.
• alkyl is preferably methyl or ethyl
• alkoxy is preferably methoxy or ethoxy
• cycloalkyl is preferably cyclopentyl or cyclohexyl.
• suitable substituents are hydroxyl, amino, alkylamino, dialkylamino, halogen and / or alkylcarbonyl.
• R 2 is preferably methyl or ethyl and R 3 is methyl, ethyl, methoxy or ethoxy, where R 1 has the abovementioned meaning.
• R 2 is particularly preferably methyl or ethyl and R 3 is methoxy or ethoxy.
• the protected vinyl monomer a) is in particular methyl (2-methoxy-2-methyl-1,3-dioxolan-4-yl) methacrylate (MMDMA), methyl (2-methoxy-2-methyl-1,3-dioxolane 4-yl) acrylate (MDMA) and / or 2,3-O-isopropylidene glyceryl methacrylate (IPGMA), most preferably MMDMA and / or MDMA.
• MMDMA 2-methoxy-2-methyl-1,3-dioxolan-4-yl methacrylate
• MDMA methyl (2-methoxy-2-methyl-1,3-dioxolane 4-yl) acrylate
• IPGMA 2,3-O-isopropylidene glyceryl methacrylate
• the preparation of the protected vinyl monomer a) is generally carried out by reacting an unsaturated carboxylic acid with a polyol or an epoxide formed therefrom (eg
• the silicone-containing monomer b) is preferably a monomer of the formula (II) or (III)
• X is O, NR 1 or 1,3-dioxopropan-2-ol
• R 1 is hydrogen or methyl
• R 4 is independently C 1 -C 4 -alkyl or O-Si (R 5 ) 3,
• R 5 is independently C 1 -C 4 -alkyl
• R 6 is independently C 1 -C 4 -alkyl, f is an integer from 1 to 10 and n is an integer from 1 to 20.
• silicone-containing monomers b) of the formula II, wherein Z is O, X is O or NR 1 , R 1 is hydrogen, f is an integer from 2 to 4, and R 4 is methyl.
• the silicone-containing monomer b) is preferably selected from the group consisting of methacryloxypropyltris (trimethylsiloxy) silane (TRIS), methacryloxypropylbis (trimethylsiloxy) methylsilane, methacryloxypropylpentamethyldisiloxane, methacryloyloxymethylheptamethyltrisiloxane, methacryloyloxypropylpolydimethylsiloxane, methacryloyloxyethyltrimethylsiloxane, methyldi ( trimethylsiloxy) silylpropylglycerol methacrylate and vinyloxycarbonylaminopropyltris (trimethylsiloxy) silane.
• TMS methacryloxypropyltris
• methacryloxypropylbis (trimethylsiloxy) methylsilane methacryloxypropylpentamethyldisiloxane
• the proportion of the silicone-containing (meth) acrylate, vinyl carbonate or vinyl carbamate monomer b) in the monomer mixture is preferably 30-65 mol% and particularly preferably 30-60 mol%.
• the silicone-containing monomers b) used according to the invention are prepared by methods known from the literature and are i.a. also commercially available such as TRIS, methacryloxy-polydimethylsiloxane, tris (trimethylsiloxysilyl) propylvinylcarbamate and acryloxymethyltrimethylsilane.
• the hydrophilic vinyl monomer c) is selected from acrylates and methacrylates of the formula
• H 2 C C (R 1 ) -COOR 7 ,
• R 1 is hydrogen or methyl and R 7 is a Ci-Cio-alkyl radical which is replaced by a water-solubilizing group such as carboxy, hydroxy or tert.
• Amino a polyethylene oxide group having 2-100 repeating units or a sulfate, phosphate, sulfonate or phosphonate monosubstituted or polysubstituted, further acrylamides and methacrylamides of the formula
• H 2 C C (R 1 ) -CON (R 8 ) 2 in which R 8 is hydrogen or C 1 -C 4 -alkyl and R 1 has the abovementioned meaning;
• H 2 C C (R 1 ) -CONHR 8 wherein R 1 and R 8 have the abovementioned meaning; Maleins and fumarates of the formula
• Vinyl-substituted five- or six-membered heterocycles having one or two nitrogen atoms especially N-vinyl lactams having 4-6 carbon atoms, and vinylically unsaturated carboxylic acids having a total of 3-10 carbon atoms, such as methacrylic acid, crotonic acid, fumaric acid or cinnamic acid.
• the vinyl monomer c) is preferably selected from hydroxy, carboxy or tert-amino-substituted C 1 -C 6 -alkyl (meth) acrylates, hydroxy or carboxy-substituted C 1 -C 4 -alkyl (meth) acrylamides,
• hydroxy-substituted C 2 -C 4 -alkyl (meth) acrylates five- to seven-membered N-vinyllactams, N, N-di-C 1 -C 4 -alkyl (meth) acrylamides and vinylically unsaturated carboxylic acids having 3 to 5 carbon atoms.
• water-soluble monomers c) may be mentioned by way of example: 2-hydroxyethyl, 2- and 3-hydroxypropyl, 2,3-dihydroxypropyl, Polyethoxyethyl- and Polyethoxypropylacrylate and methacrylates and the corresponding acrylamides and methacrylamides, acrylamide and methacrylamide, N-methylacrylamide and -methacrylamide, bis-acetone acrylamide, 2-hydroxyethyl acrylamide, dimethyl acrylamide and methacrylamide, and methylol acrylamide and methacrylamide, N, N-dimethyl and N, N-diethylaminoethyl acrylate and methacrylate, and the corresponding acrylamides and methacrylamides, N-tert-butyl Butylaminoethyl methacrylate and methacrylamide, 2- and 4-vinylpyridine, 4- and 2-methyl-5-vinylpyridine, N-methyl-4-vinylpiperidine, 1-viny
• Very particularly preferred monomers c) are 2-hydroxyethyl methacrylate, N-vinyl-2-pyrrolidone, N, N-dimethylacrylamide and also acrylic and / or methacrylic acid, in particular 2-hydroxyethyl methacrylate and / or methacrylic acid.
• the proportion of Vinylmo nomers c) in the monomer mixture is preferably 5-20 mol% and particularly preferably 10-15 mol%.
• crosslinker d in particular diolefinic monomers, e.g. Allyl acrylate and methacrylate, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and generally polyethylene oxide glycol diacrylates and dimethacrylates, 1,4-butanediol and poly-n-butylene oxide glycol diacrylates and dimethacrylates, propylene glycol and polypropylene oxide glycol diacrylates and dimethacrylates, thiodiethylene glycol diacrylate and dimethacrylate, di- (2-hydroxyethyl) sulfone diacrylate and dimethacrylate, neopentyl glycol diacrylate and dimethacrylate, trimethylolpropane tri and tetraacrylate, pentaerythritol tri and tetraacrylate, divinylbenzene, divinyl ether, divinylsulfone, disiloxanyl-bis-3-hydroxyprop
• Ethylene glycol dimethacrylate is preferred.
• the crosslinker if present, is preferably used in amounts of 1.0 to 3.0 mol%, in particular 1.4-1.7 mol%, in each case based on the total amount of the monomers a) to c).
• the hydrogels of the invention are produced by radical copolymerization, either in bulk or in the presence of common solvents.
• the polymerization in the presence of an alcohol such as amyl alcohol has proven to be advantageous for the swelling behavior.
• the polymerization is suitably carried out in the heat, preferably in the presence of a free-radical initiator, for example at a temperature in the range of about 30 0 C to about 105 ° C.
• initiators preferably peroxides or azo catalysts are used.
• Typical examples of usable peroxy compounds are isopropyl percarbonate, tert-butyl peroctoate, benzoyl peroxide, lauroyl peroxide, decanoyl peroxide, acetyl peroxide, succinic peroxide, methyl ethyl ketone peroxide, tert-butyl peroxyacetate, propionyl peroxide, 2,4-dichlorobenzoyl peroxide, tert-butyl peroxypivalate, tert-butyl peroxy-2-ethylhexanoate, pelargonyl peroxide , 2,5-Dimethyl-2,5-bis (2-ethylhexanoylperoxy) -hexane, p-chlorobenzoyl peroxide, tert-butyl peroxybutyrate, tert-butyl peroxymaleic acid, tert-butyl peroxyisopropyl carbon
• Suitable azo compounds are 2,2-azo-bis-isobutyronitrile, 2,2'-azobis (2,4-dimethylvaleronitrile), 1,1-azobis (cyclohexanecarbonitrile) and 2,2-azobis (2,4-dimethyl-4-methoxyvaleronitrile).
• the amount of initiator may vary between 0.002 and 1 mole%, based on ingredients a) to d), but is preferably 0.03 to 0.3 mole%.
• the monomers a) to c) used and the crosslinker d) are known, some of which are commercially available or can be prepared by processes known per se. Before the polymerization, they are conveniently purified, in particular to remove inhibitors with which they are stabilized. Then the polymerization mixtures are polymerized in a manner known per se.
• the copolymers obtainable as described above must be hydrated. This is conveniently done by storing in aqueous buffered saline, which is preferably isotonic.
• the polymers are optionally cut into thin slices prior to hydration or polymerized directly in a mold suitable for the manufacture of contact lenses.
• copolymers obtainable as described above still contain the hydroxyl groups present there in protected form in the segments formed by the vinyl monomers a). They are therefore still relatively strong hydrophobic.
• the protective groups By cleavage of the protective groups and subsequent hydration they can be converted into the hydrogel according to the invention, which contains in the segments formed by the vinyl monomers a), the hydroxyl groups present there in free form.
• the cleavage of the protecting groups can be done by introducing into an acidic medium, for example, in dilute HCl or acetic acid, as is well known in the literature (Beyer, Walter: textbook of organic chemistry, S.
• the erf ⁇ ndungssiee method makes it possible to produce copolymers of hydrophilic and hydrophobic sequence units, which have no phase separation both in the unswollen and in the swollen state (hydrogel) and are therefore optically clear.
• the hydrogels according to the invention have very good oxygen permeabilities and are hydrophilic and additionally mechanically stable, i. they have e.g. a high tear resistance. They are therefore excellently suited as materials for contact lenses or intraocular lenses as well as other biocompatible materials, such as e.g. Implants, blindfolds, transdermal systems or other forms of medicament carriers.
• contact lenses from the hydrogels mentioned can be carried out in a manner known per se.
• the mixtures to be polymerized for example in polymerized cylindrical shape, and the available bars after demoulding into slices or buttons cut, which can be further processed mechanically.
• the polymerization can also be carried out in lens forms, so that lens blanks are obtained directly as polymers.
• the polymerizations were 2h at 80 0 C in substance (Examples 1-9, 12 +13) carried out as a random copolymerization, using as an initiator tert-butyl peroxy-2-ethylhexanoate (V 69) was used.
• V 69 tert-butyl peroxy-2-ethylhexanoate
• the silicone-containing monomer b) used was methacryloyloxypropyltris (trimethylsiloxy) silane (TRIS), and the vinyl monomer a) used was methyl (2-methoxy-2-methyl-1,3-dioxolan-4-yl) methacrylate (MMDMA), methyl (2-methoxy-2-methyl-1, 3-dioxolan-4-yl) acrylate (MDMA) or 2,3-O-Isopropylidenglycerylmethacrylat (IPGMA) used.
• TMS methacryloyloxypropyltris
• vinyl monomer a) used was methyl (2-methoxy-2-methyl-1,3-dioxolan-4-yl) methacrylate (MMDMA), methyl (2-methoxy-2-methyl-1, 3-dioxolan-4-yl) acrylate (MDMA) or 2,3-O-Isopropylidenglycerylmethacrylat (IPGMA)
• Ethylene glycol dimethacrylate (EGDMA) was used as crosslinker d) and optionally hydroxyethyl methacrylate (HEMA) and / or methacrylic acid (MAS) were used as additional hydrophilic monomers c).
• HEMA hydroxyethyl methacrylate
• MAS methacrylic acid
• the copolymers have excellent hydrophilic properties and can therefore be used as mechanically robust contact lens materials with high oxygen permeability and good eye tolerance.

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• Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
• Eyeglasses (AREA)
• Prostheses (AREA)

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• 2008
  • 2008-06-12 DE DE102008002375A patent/DE102008002375A1/de not_active Withdrawn
• 2009
  • 2009-04-23 KR KR1020107025436A patent/KR20110028435A/ko not_active Application Discontinuation
  • 2009-04-23 EP EP09761548A patent/EP2286283A1/de not_active Withdrawn
  • 2009-04-23 JP JP2011512909A patent/JP2011522934A/ja active Pending
  • 2009-04-23 WO PCT/EP2009/054885 patent/WO2009149985A1/de active Application Filing
  • 2009-04-23 CN CN2009801136966A patent/CN102027391A/zh active Pending
  • 2009-04-23 US US12/936,486 patent/US20110046332A1/en not_active Abandoned
  • 2009-06-09 TW TW098119209A patent/TW201006853A/zh unknown

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