Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
  • C07C271/06—Esters of carbamic acids
  • C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
  • C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
  • C07C271/16—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by singly-bound oxygen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
  • C07C271/06—Esters of carbamic acids
  • C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
  • C07C271/24—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atom of at least one of the carbamate groups bound to a carbon atom of a ring other than a six-membered aromatic ring
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/0834—Compounds having one or more O-Si linkage
  • C07F7/0838—Compounds with one or more Si-O-Si sequences
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
  • C07F7/02—Silicon compounds
  • C07F7/08—Compounds having one or more C—Si linkages
  • C07F7/10—Compounds having one or more C—Si linkages containing nitrogen having a Si-N linkage
• • 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
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/14—The ring being saturated

Definitions

• the invention is related to novel compounds having utility in the formation of polymeric materials and particularly in the formation of hydrogels.
• the invention also relates to the use of such materials in the field of hydrogel contact lenses, wound healing, controlled drug delivery, medical devices, catheters, stents and tissue engineering.
• a hydrogel is a hydratable crosslinked polymeric system.
• Hydrogels useful in many applications are also oxygen permeable and bio-compatible, making them preferred materials for producing bio-medical devices and in particular contact or intraocular lenses.
• Conventional hydrogels are prepared from monomeric mixtures predominantly containing hydrophilic monomers such as 2-hydroxyethyl methacrylate (HEMA) or N-vinyl pyrolidinone (NVP) and hydrophobic monomers or macromers to obtain a polymer having a required hydration capacity and oxygen permeability.
• HEMA 2-hydroxyethyl methacrylate
• NDP N-vinyl pyrolidinone
• the oxygen permeability is commonly associated with polymers found from hydrophobic monomers containing siloxane orfluoro polymer moieties.
• the oxygen permeability of the conventional hydrogel materials are related to water content of the materials and is typically below 20-30 barrers.
• the level of oxygen permeability is suitable for short-term wear of the contact lenses; however, that level of oxygen permeability may be insufficient to maintain a healthy cornea during long-term wear of the contact lenses (e.g., 30 days without removal).
• Efforts have been made and continue to be made to increase the oxygen permeability and water content or hydration of conventional hydrogels without adversely affecting the physical properties of the hydrogel polymers.
• One known way to increase the oxygen permeability of hydrogels is to add silicone- containing monomers or macromers to the hydrogel formulation and/or fluorine-containing monomers or macromers in the formulation to produce the hydrogels.
• Silicone-containing hydrogels generally have higher oxygen permeabilities than conventional hydrogels.
• Silicone-containing hydrogels have typically been prepared by polymerizing mixtures containing at least one organic silicone-containing monomer and at least one hydrophilic monomer.
• Either the silicone-containing or the hydrophilic monomer may function as a crosslinking agent (a crosslinking agent is a monomer having multiple polymerizable functionalities) or a separate crosslinking agent may be employed.
• U.S. Patent No.3,808,178 discloses the formation of co-polymers with low molecular weight silicone-containing monomers and various hydrophilic monomers.
• U.S. Patent No. 5,034,461 describes silicone-containing hydrogels prepared from various combination of silicone-polyurethane macromers and hydrophilic monomers such as HEMA, vinyl pyrollidone (NVP) and/or dimethylacrylamide (DMA).
• HEMA vinyl pyrollidone
• DMA dimethylacrylamide
• the addition of methacryloxypropyltris(trimethylsiloxy)silane(TRIS) reduces the modulus of such hydrogels, but in many examples the modulus was still higher than may be required.
• Patent Nos., 5,358,995 and 5,387,632 describe hydrogels made from various combinations of silicone macromers, TRIS, NVP and DMA. Replacing a substantial portion of the silicone macromer with TRIS reduced the modulus of the resulting hydrogels.
• the two publications from the same author "The Role of Bulky Polysiloxane Alkylmethacrylates in Polyurethane-Polysiloxane Hydrogels", J. Appl. Poly. ScL, Vol. 60, 1193-1198 (1996), and "The Role of Bulky Polysiloxanyl Alkylmethacrylates in Oxygen Permeable Hydrogel Materials", J. Appl. Poly. ScL, Vol.
• hydrogels Notwithstanding some degree of success in connection with prior materials used for the formation of polymeric materials, particularly hydrogels, applicants have come to recognize a continuing need for new compounds, compositions, materials, products and methods having an advantageous but difficult to obtain combination of properties. With respect to hydrogels, applicants have come to appreciate the need for hydrogels that are soft, possess high oxygen permeability, suitable water content and sufficient elasticity.
• Applicants have developed new compounds, and new compositions, having utility in numerous applications, including as reactants and intermediates in the formation of polymers and polymeric materials.
• applicants have developed new polymers based upon (that is, formed at least in part from) one or more of the compounds and/or compositions described herein, and preferably one or more of the novel compounds described herein.
• One aspect of the present invention provides compounds according to Formula I:
• R 7 is H or a straight chain or branched, substituted or unsubstituted C1-C4 alkyl group, and in certain preferred embodiments methyl
• each R 21 is independently H, a C1 - C4 alkyl group, or R 23 , where R 23 js R 25 - O-(CR 25A H-CR 25A HO) ⁇ -CHR 25A CR 25A H-, where each R 25 is independently a straight chain or branched, substituted or unsubstituted, C1-C4 alkyl group
• each R 25A is independently H, a straight chain or branched, substituted or unsubstituted, C1-C4 alkyl group and x is from about 1 to about 50
• each R 50 is independently a bivalent group selected from R 50A and R 50B , and each
• R 51 is independently a bivalent group selected from R 51A and R 51B
• R 50A and R 51A are each independently
• R 50B and R 51B are each independently
• each R 22 is independently H 1 a halogen, or a substituted or unsubstituted C1 - C4 alkyl, provided preferably that at least one R 22 is H, each R 55 is independently a bivalent group selected from
• each a is independently from 1 to 10
• each b is independently from 2 to 50, preferably from 2 to 20 in certain embodiments, each R ,22 is as defined above,
• each c is independently 1 to 5
• each d is independently from 8 to 50
• e is from 1 to 100, more preferably in certain embodiments from 1 to 50, and from 1 to about 30 is certain preferred embodiments, and R 55D is
• each R 20 is independently H or F
• each R is independently
• R 26 is -[CH 2 ]c- (where c is as defined above)
• R 60A is
• R 4 is a C1-C6 alkyl group
• each R is independently aryl, cycloalkyl and aliphatic alkyl or aromatic alkyl, polyaromatic, polyaromatic alkyl or polycycloaliphatic alkyl
• each X is independently H, an alkyl or haloalkyl moiety having from 1 to about 10 carbon atoms, with and without ether linkages between carbon atoms, or a siloxane group corresponding to -O-Si-R 9 , with each R 9 being independently a straight chain or branched, substituted or unsubstituted C1-C4 alkyl group, or a phenyl group
• each na, ne and nf is independently from 1 to 4, ma is 0 or 1
• each nc is independently 0 to 6
• each of nb, ob, oc, and od is independently from 0 to 4.
• compositions comprising one or more of the compounds of the present invention in accordance with Formula I.
• Another aspect of the invention is directed to methods of forming the compounds and compositions of the invention.
• Another aspect of the invention relates to methods of processing the present compounds and composition, including polymers and polymeric materials formed from there from.
• C1 - C4 alkyl group means and includes within its scope all alkyl groups having at least one carbon atom but not more than about 4 carbons atoms. Unless specifically indicated herein to the contrary, the term “C1 - C4 alkyl group” includes within its scope all straight chain, branched chain, substituted and unsubstituted versions thereof. Similar terminology has the same meaning depending on the numbers used. For example, the term “C1 - C6 alkyl group” means and includes within its scope all alkyl groups having at least one carbon atom but not more than about 6 carbons atoms.
• terminal -OH group and "terminal siloxane-containing group” means a hydroxyl group or a siloxane-containing group bonded to a primary, secondary or tertiary carbon atom. Unless specifically indicated otherwise herein or clearly indicated otherwise by context, all values for R substituents and subscript values have the same meaning throughout the present specification once defined herein.
• novel compounds of the present invention, and the new polymers and copolymers, including cross-linked polymers, formed from the present compounds, either alone or in combination one or more of additional monomers and cross-linking agents, are particularly useful in connection with the formation of biomedical materials and products, including catheters and stents, and are especially advantageous in the area of contact lens applications.
• the new polymers, oligomers, macromers and monomers in accordance with the present invention provide an opportunity to introduce oxygen and in particular hydroxyl groups into the structure of the polymeric material produced there from to increase the hydration capacity of the polymer, and particularly the hydrogel forms thereof, and are especially advantageous in connection with soft contact lens material.
• the preferred polymers of the present invention have the advantage of having a relatively high polarity while at the same time providing excellent mechanical and physical properties to the contact lens material produced therefrom.
• the compounds of Formula I comprise compounds in which ma is 1, each nc is O 1 one R is OH and the remaining R 60 is R 26 OH 1 which is illustrated below as compounds in accordance with Formula IA:
• One preferred compound in accordance with this embodiment comprises compounds in which each of na and nb is 1 , R 50 is R 50B , R 51 is R 51A and R 26 is -CH 2 - is illustrated below as Formula IA1 :
• the compounds of Formula I comprise compounds in which ma is 1 , each nc is O 1 one R 60 is H and the remaining R 60 is a monovalent siloxane-containing group.
• One preferred compound in accordance with this embodiment is illustrated below as Formula IB:
• each X is -O-Si-R 9 , which is represented by Formula IB1 below:
• each of na, nb, nc and ne is 1
• R 50 is R 50B
• R 51 is R 51A
• each of R 21 and R 22 is H is illustrated below as Formula IB2:
• Formula I comprise compounds in which ma is O, na is 1 , with R 50 being R 50A , nb is 0, each nc is 2, with one [R 55 ] 2 being -O-R 55D - and the other [R 55 J 2 being -R 55A -R 55D -, with oc and od in each case being 0, in accordance with Formula IC below:
• the compounds of Formula IC comprise compounds in which each R 60 is R 60C , in accordance with Formula IC1 below:
• the compounds of Formula IC1 comprise compounds in which each ne and each nf is 1 , in accordance with Formula IC2 below:
• each R 21 and each R 22 is H.
• Formula I comprise compounds in which ma is 0, na is 1 , with R 50 being R 50A , nb is 0, one nc is 2, with one [R 55 J 2 being -O-R 55D -, one nc is 5, with [R 55 J 5 being -R 55A -R 55D -R 55C -O-
• the compounds of Formula ID comprise compounds in which one R ⁇ 60 • is r R->60C and in which the other R 60 • is o R60D in accordance with Formula ID1 below:
• the compounds of Formula I comprise compounds in which at least one R 55 is a halogen substituted alkyl, more preferably a fluorine substituted alkyl.
• R 55 is a combination of -[CF 2 Jb-, R 55A in which R 22 is selected from H and a halogen, preferably F, R 55B in which R 22 is selected from H and a halogen, preferably F.
• R 55 comprises such a combination resulting in one or more of the following groups: -CH 2 -O-CF 2 -O-(CF 2 -CF 2 -O) X -(CF 2 -OVCF 2 -CH 2 -O- -CH 2 -O-CF 2 -O-(CF 2 -CF 2 -O) X -(CF 2 -OVCF 2 -CH 2 -(O-CH 2 -CH 2 ) Z -O-
• each x, y and z is selected by those skilled in the art to achieve a group average molecular weight ranging from about 1500 to about 4500, more preferably from about 2000 to about 4000. In certain preferred embodiments the average molecular weight of the group is about 2000, and in other embodiments about 2500, and in yet other embodiments about 4000.
• the compounds of Formula I comprise compounds in which ma is O 1 na is 1 , with R 50 being R 50A , nb is 0, one nc is 2, with [R 55 ] 2 being -O-R 55D -, one nc is 5, with [R 55 J 5 being _R 55A -R 55D -R 55AB -O-R 55D - with oc and od in each case being 0, and R55 AB being any combination of R 55A and R 55B , and one R 60 being R 60C and the other R 60 being R 60D in accordance with Formula ID2 below: where R 55AB j s preferably selected from the group consisting of -CH 2 -O-CF 2 -O-(C F 2 -C F 2 -O) x -(C F 2 -O) y -C F 2 -C H 2 -O- -CH 2 -O-CF 2 -O-(CF 2 -CF 2 -
• One non-limiting example of the usefulness of the compounds in accordance with Formula I is as monomers, oligomers and macromers which participate in reactions that form a wide variety of useful polymeric materials and products.
• One non-limiting example of the usefulness of the compounds in accordance with Formula I is as monomers, oligomers and macromers which participate in reactions that form a wide variety of useful polymeric materials and products.
• One non-limiting example of the usefulness of the compounds in accordance with Formula I is as monomers, oligomers and macromers which participate in reactions that form a wide variety of useful polymeric materials and products.
• One non-limiting example of the usefulness of the compounds in accordance with Formula I is as monomers, oligomers and macromers which participate in reactions that form a wide variety of useful polymeric materials and products.
• Formula Il is as monomers, oligomers and macromers which participate in reactions that form a wide variety of useful polymeric materials and products, including particularly ophthalmic lens material.
• Another aspect of the present invention relates to reactive compositions comprising at least one compound according to Formula I 1 and to compositions comprising a combination of at least a first compound according to Formula I and at least a second compound, different from said first compound, according to Formula I.
• compositions and methods for producing polymeric materials preferably hydrogel polymers, and even more preferably contact lens material and contact lenses wherein such compositions comprise compounds, and preferably polymeric materials, based on or derived from one or more of the compounds according to Formula I.
• compositions and methods of the present invention are adaptable to synthesis from relatively inexpensive starting materials and from the use of relatively simple and cost effective procedures.
• certain of the novel compounds in accordance with Formula I are formed utilizing a reactant comprising: a dioxolan compound, and even more preferably a methylated and hydroxylated dioxolan, such as isopropylidene glycerol; and/or isocyanato compound(s); and/or allyloxy alkanediol(s); and/or glycerol ethers, and combinations of any two or more of these.
• compositions and compounds of the invention provide a combination of hydrophilic and hydrophobic groups which, when used to form polymeric materials, and particularly hydrogel compositions, provide a material with a highly advantageous combination of hydrating ability, oxygen transmission properties and mechanical properties.
• novel compounds of the present invention in accordance with Formula I are relatively reactive compounds having substantial and highly desirable utility in a number of applications, including particularly in the formation of polymeric materials. Accordingly, it is contemplated that the reaction products made from the reactive compounds of the present invention will produce, in many embodiments, novel polymeric materials, even in those situations in which the novel reactive compounds of the present invention are reacted with known compounds. Accordingly, one aspect of the present invention relates to novel polymers formed from one or more of the novel reactive compounds of the present invention. As used herein, the term "formed from” encompasses within its meaning any molecule, macromer, oligomer or polymer which is formed, in any substantial part, by a reaction involving any one or more of the compounds of the present invention.
• the present invention comprises at least one polymer formed from at least one novel compound in accordance with the present invention.
• compositions comprising one or more of the compounds of the present invention, and preferably one or more compounds in accordance with Formula I (including all compounds within the general formula and also all those compounds within Formulas IA, IB, IC, ID and IE) and combinations of any two of these.
• the present compositions are reactive compositions comprising at least about 2% by weight, and even more preferably at least about 10% of compounds in accordance with the present invention.
• the compositions of the present invention comprise at least about 50% by weight of compounds in accordance with the present invention, and even more preferably in certain embodiments at least about 40% by weight of compounds in accordance with Formula IC.
• the compositions include, preferably in an amount of at least about 1%, and more preferably from about 1% to about 90% by weight, more preferably about 1 % to about 60%, and even more preferably from about 3% to about 55% by weight of the composition, one or more compounds in accordance with Formula ID, more preferably Formula ID1 or ID2.
• compositions of the present invention will generally be included in the compositions of the present invention to enhance the reactivity thereof and/or to particularly tailor the compositions for the formation of the desired reaction product or other use, and in particular the desired macromeric, oligmeric and/or polymeric material and even more preferably the desired polymeric material suitable for formation of a hydrogel. It is contemplated that those skilled in the art will be able to readily adapt known comonomers and other agents, such as cross-linking agents, into the compositions of the present invention without undue experimentation in view of the teachings and disclosure contained herein, and all such compositions are within the scope of the present invention.
• the present compositions include, preferably in an amount of at least about 1%, and more preferably from about 1% to about 80% by weight, and even more preferably from about 40% to about 70% by weight of the composition, one or more co-monomers and/or co-macromers.
• co-monomer and co-macromer refers to any compound that is not a novel compound in accordance with the present invention but which acts as a monomer or macromer in the composition.
• such monomers and/or macromers may include one or more of the following: hydroxyethylmethacrylate, dimethylacrylamide, N-vinylpyrollidone, Methacrylic acid, glycerol monomethacrylate, and combinations of these.
• compositions can include, preferably in an amount of at least about 0.5%, and more preferably from about 0.5% to about 10% by weight, and even more preferably from about 0.5 % to about 5% by weight of the composition, one or more cross linking compounds.
• cross-linking agents may include one or more of the following: a compound in accordance with the formula IE and (meth) acrylate crosslinkers such as but not limited to ethyleneglycol dimethacrylate (EGDMA), tri- and/or tetraethyleneglycol dimethacrylate, including all combinations of these two (TEGDMA), butanediol dimethacrylate (BDDMA), (poly)ethyleneglycol dimethacrylate (PEGDMA), and combinations of any two or more of these.
• EGDMA ethyleneglycol dimethacrylate
• BDDMA butanediol dimethacrylate
• PEGDMA polyethyleneglycol dimethacrylate
• Example 1 Synthesis of Compound Corresponding to Formula IA
• a Teflon stirrer and a gas egress tube connected to an oil bubbler is placed in a 200 ml_ three neck round bottomed flask fitted with an air sparge tube, a Teflon stirrer and a gas egress tube connected to an oil bubbler is placed.
• About 15.5 g of isocyanatoethyl methacrylate, 0.025g dibutyl tin dilaurate, 100 ppm 2,6-Ditert-butyl-4 methyl phenol and 100 g of dry methyl ethyl ketone are added.
• the flask is heated under a dry nitrogen sparge to about 55°C.
• Example 2 Synthesis of Compound Corresponding to Formula IC2
• Teflon stirrer and a gas egress tube connected to an oil bubbler is placed.
• About 45.6g of isophorone diisocyanate, 0.05g dibutyl tin dilaurate, and 100 ppm of 2,6-ditert-butyl-4 methyl phenol are added and the flask is heated under a dry air sparge to about 55 0 C.
• about 16g of glycerol monomethacrylate is added at a rate such that the temperature does not exceed about 65°C.
• the reaction is continued until the %NCO for the adduct is determined by dibutylamine titration to be between 13.8-14.8%. Then about 29.04g of isopropylidene glycerol is added to the adduct as above and the reaction is continued at about 65 0 C until an FTIR scan shows complete absence of an NCO peak at 2270 cm-1 and the end group analysis of NCO using a dibutylamine titration shows that residual NCO is ⁇ 0.1%.
• Example 3 Synthesis of Compound Corresponding to Formula IB2
• About fifty grams of dry toluene and about 31 g of isocyanatoethyl methacrylate, 0.025g dibutyl tin dilaurate, 100 ppm 2,6-ditert-butyl-4 methyl phenol are charged to a 250 mL 3-necked RB-flask fitted with a CaCI2 drying tube, condenser and magnetic stirrer.
• about 5.8 g of allyl alcohol is added drop wise at a rate such that any exotherm temperature does not exceed about 75°C.
• the reaction is continued at about 60 0 C until an FTIR scan shows no NCO peak at 2270 cm-1.
• the dry liquid is then reacted with 29.6g of tris(trimethylsiloxy)silane in presence of Karstedt catalyst (0.1 molar in xylene, 300 ⁇ L) at 65°C, until an FTIR scan showed no SiH peak at 2130 cm-1.
• Karstedt catalyst 0.1 molar in xylene, 300 ⁇ L
• the resultant mixture is extracted with an MeOH/water mixture and the solvent is removed from the organic layer to obtain siloxane-containing monomer according to Formula IB2.
• the reaction is continued until the %NCO for the adduct is determined by dibutylamine titration to be between 13.8-14.8%. Then 100g (0.05 moles) of ⁇ , ⁇ .- hydroxypropyl-terminated polydimethylsiloxane KF-6001 from Shin-Etsu (average mol. Wt. of 2000 g/mol) and 100 g of dry toluene are added to adduct as above and the reaction is continued at 65°C until an FTIR scan shows an absence of a hydroxyl peak at 3400 cm -1 and the end group analysis of NCO using a dibutylamine titration shows that %NCO is between 2.5 and 3.0 for the reaction mixture.
• the flask is heated under a dry air sparge to 55°C. Then using a dry air sparged addition funnel 16g (0.10 mol) of glycerol monomethacrylate from example 1 is added at a rate such that the temperature does not exceed 65 0 C. The reaction is continued until the %NCO for the adducts, as determined by dibutylamine titration, is between 13.8-14.8%. Then 10O g of a dihydroxy functional perfluoropolyether Fomblin.RTM. ZDOL 2000 from Solvay Solexis Inc.
• the dry liquid is then reacted with 29.6g of tris(trimethylsiloxy)silane in presence of Karstedt catalyst (0.1 molar in xylene, 300 ⁇ L) at 65°C, until an FTIR scan showed no SiH peak at 2130 cm-1.
• Karstedt catalyst 0.1 molar in xylene, 300 ⁇ L
• siloxane crosslinker according to Formula I (and identified in Table 1 below as Formula IE1) in which ma is 1 , na is 1 with R 50 being R 50B , nb is 1 with R 51 being R 51A , with each nc being 1, with one R 55 being -O- and the other R 55 being R 55A with c being 1 , and one R 60 is R 60B with ne being 3 and each X being -O-Si-R7, and the other R 60 being R 60A with nb beng 1 and R 4 being C2 alky!, and R 7 and R 21 being H.
• Formula I (and identified in Table 1 below as Formula IE1) in which ma is 1 , na is 1 with R 50 being R 50B , nb is 1 with R 51 being R 51A , with each nc being 1, with one R 55 being -O- and the other R 55 being R 55A with c being 1 , and one R 60 is R 60B with ne being 3 and each
• compositions and compounds of the invention are useful in preparing hydrogels and in particular hydrogels for use in contact lenses, and even more preferably as monomers for preparing hydrogels which require hydrophilic properties for medical devices.
• the monomers and macromers of the present invention can be polymerized with known monomers for forming hydrogels to provide hydrogels with unique properties.
• the following table provides some examples of compositions in accordance with the present invention.
• the compositions are polymerized using heat or UV and/or visible light or a combination of both using either thermal polymerization initiators such as but not limited to azobisisobutyronitirile or photoinitiators such as but not limited to 2-hydroxy-2-methyl-1- phenyl-propan-1-one, (Tradename Darocur 1173 from Ciba Specialty Chemicals).
• the water content, oxygen permeability and mechanical properties such as elastic modulus, elongation and tensile strength of the hydrogels can be varied over broad ranges by varying the proportions of known hydrogel monomers and macromers.
• the foregoing examples of formulations for hydrogel polymers can provide hydrogel polymers with required water content, oxygen permeability and physical properties.
• the combinations of properties make the hydrogels formed from monomers or macromers of the invention useful in many areas of hydrogel utility.

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• Organic Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Ophthalmology & Optometry (AREA)
• General Physics & Mathematics (AREA)
• General Health & Medical Sciences (AREA)
• Optics & Photonics (AREA)
• Silicon Polymers (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
• Macromonomer-Based Addition Polymer (AREA)
• Eyeglasses (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Materials For Medical Uses (AREA)

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• 2010
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