Ionically modified silicones, compositions, and medical devices formed therefrom
A hydrophilic silicone, compositions comprising the same, and articles comprising the same are shown and described herein. The hydrophilic silicone is an ionically modified silicone compound wherein the compound has a net neutral charge. The hydrophilic silicone compounds may be provided as part of a composition, e.g., a composition suitable for forming a hydrogel, which may be employed to form a film material and even an article (e.g., in a contact lens).
1. A silicone compound of the Formula (I):
where R 1 is chosen from a chemical bond or a divalent group comprising 1 to 16 carbon atoms optionally containing a heteroatom chosen from oxygen, sulfur, or nitrogen;
R 2 is a linear, branched, cyclic, or cage like siloxanyl moiety, or a silane moiety having the general structure (a)
X 1 is independently selected from linear or branched alkyl group containing 1-16 carbon atoms, trimethoxy silyl, trimethylsilyloxy, —O[Si(CH 3 ) 2 O-] n wherein n is an integer chosen from 1 to 9, (CH 3 ) 3 Si(CH 2 ) o CH 2 — wherein o is an integer from 0-3, (CH 3 ) 3 SiCH 2 CH 2 Si(CH 3 ) 2 O—, or (CH 3 ) 3 Si(CH 2 CH 2 Si(CH 3 ) 2 O) s — wherein s is an integer chosen from 0-200;
X 2 is independently selected from a linear or branched alkyl group containing 1-16 carbon atoms, trimethoxy silyl, trimethylsilyloxy, —O[Si(CH 3 ) 2 O-] n wherein n is an integer chosen from 1 to 9, (CH 3 ) 3 Si(CH 2 ) o CH 2 — wherein o is an integer from 0-3, (CH 3 ) 3 SiCH 2 CH 2 Si(CH 3 ) 2 O—, or (CH 3 ) 3 Si(CH 2 CH 2 Si(CH 3 ) 2 O) z — wherein z is an integer chosen from 0-200, or —[OSi(CH 3 ) 2 ]mG 1 , wherein G 1 is (CH 3 ) 3 SiO— and m is an integer from 0 to 400, or a reactive or non-reactive silicone group with the general Formula (b1) or (b2):
where 1 is an integer chosen from 0-200; and p in Formula (a) is 0 when X 2 is of the Formula (b1) or (b2);
X 3 and X 5 are independently chosen from a C1-C6 alkyl, trimethylsiloxy, trimethylsilyloxy, (CH 3 ) 3 SiCH 2 CH 2 —, (CH 3 ) 3 SiCH 2 CH 2 Si(CH 3 ) 2 O—, and OSi(CH 3 ) 2 , with the provisos that (i) when X 1 or X 6 is —O[Si(CH 3 ) 2 O-] n , then X 3 and X 5 , respectively, is OSi(CH 3 ) 2 and X 1 forms a chemical bond with the X 3 and X 5 forms a chemical bond with X 6 to correspondingly form a divalent —X 1 -X 3 — or X 5 —X 6 — group, which is bonded to the silicon atom to form a cyclic polysiloxane ring, and (ii) when X 3 and/or X 5 is —OSi(CH 3 ) 2 , then X 1 and/or X 6 is —O[Si(CH 3 ) 2 O-] n , and X 1 forms a chemical bond with the X 3 and/or X 5 forms a chemical bond with X 6 to form a divalent —X 1 -X 3 — or X 5 —X 6 — group, which is bonded to the silicon atom to form a cyclic polysiloxane ring;
where, X 1 , X 2 and X 3 optionally can each be —O[Si(R 7 )O—] n , and interconnected to form a polysilsesquioxane ring as described in formula (b3) and R 7 is independently chosen from a linear or branched alkyl or aralkyl group;
X 6 , X 7 , and X 8 are independently chosen from a linear or branched alkyl group containing 1-16 carbon atoms, alkoxy, trimethylsilyloxy, or —O[Si(CH 3 ) 2 O—] n , wherein n is an integer chosen from 1 to 9, and wherein X 6 and X 7 , X 7 and X 8 , or X 6 and X 8 may form a ring;
X 4 is an optional connecting group selected independently from dimethylsiloxy, —O[Si(CH 3 ) 2 O—], or —CH 2 CH 2 (CH 3 ) 2 SiO-moiety;
p is an integer chosen from 0-10;
G is a bridging unit between the siloxane moiety and reactive moiety independently selected from a linear or branched alkyl group or a carbocyclic group optionally contains hetero atoms;
A is a heteroatom;
I is an ionic containing moiety with 0-200 carbon atoms optionally containing heteroatoms, and is of the formula:
K-L-M(X) w
wherein K is a divalent hetero atom, and in one embodiment K is an oxygen atom,
L is a chemical bond or a divalent hydrocarbon radical comprising a substituted or unsubstituted, linear or branched, aliphatic or aromatic hydrocarbon with 0-50 carbon atoms, which may optionally contain heteroatoms;
w is 1 to 10;
M is independently chosen from:
X is independently chosen from a quaternary ammonium compound, a quaternary ammonium group forming compound, a cationic polymer, a group 15 elements chosen from N, P, As, Sb, or Bi, a metal, an alkali metal, an alkaline earth metal, a transition metal, a rare-earth metal or a combination of two or more thereof;
and R is independently selected from hydrogen, an alkyl, an aryl, an aralkyl, and a cycloaliphatic with 1-100 carbon atoms with optional heteroatoms which may contain functional groups like hydroxy, amide, urethane, urea, ester, amine, thiol, disulfide, ether, and the formula
wherein G 1 is an alkyl, an aryl, an aralkyl, and a cycloaliphatic with 1-100 carbon atoms with optional heteroatoms;
Z 1 is a reactive or non-reactive functional moiety of formula
wherein R 14 , R 15 , and R 16 are independently chosen from hydrogen or monovalent hydrocarbon radical with 1-5 carbon atoms; and F is a linker group chosen from aliphatic, cycloaliphatic, or aromatic hydrocarbon radical having 1-16 carbon atoms and optionally containing a heteroatom; and A is chosen from none or a heteroatom; and R 1 and R 2 are as defined above and x is 0-10; and
Z is a polymerizable group having the general Formula (c):
wherein R 14 , R 15 , and R 16 are independently chosen from hydrogen or monovalent hydrocarbon radical with 1-5 carbon atoms; and F is a linker group chosen from aliphatic, cycloaliphatic, or aromatic hydrocarbon radical having 1-16 carbon atoms and optionally containing a heteroatom.
2. The compound of claim 1 , wherein X is independently chosen from
where R is independently selected from hydrogen, an alkyl, an aryl, an aralkyl, and a cycloaliphatic with 1-100 carbon atoms with optional heteroatoms which may contain functional groups like hydroxy, amide, urethane, urea, ester, amine, thiol, disulfide, ether, and the formula (i):
wherein G 1 is an alkyl, an aryl, an aralkyl, and a cycloaliphatic with 1-100 carbon atoms with optional heteroatoms;
Z 1 is a reactive or non-reactive functional moiety of formula
wherein R 14 , R 15 , and R 16 are independently chosen from hydrogen or monovalent hydrocarbon radical with 1-5 carbon atoms; and F is a linker group chosen from aliphatic, cycloaliphatic, or aromatic hydrocarbon radical having 1-16 carbon atoms and optionally containing a heteroatom; and A is chosen from none or a heteroatom; and R 1 and R 2 are as defined in claim 1 and x is 0-10.
3. The compound of claim 1 , wherein X is a cationic polymer chosen from, a poly(ethylene amine), a poly(pyridine), a poly(imidazolium), a poly-acrylate based quaternary ammonium salt, or a combination of two or more thereof.
4. The compound of claim 1 , wherein K is oxygen, L is a C1-C6 divalent hydrocarbon radical, and M is —C(O)—OH.
5. A composition comprising (A) a hydrogel material and (B) an active substance, wherein the hydrogel material (A) is formed from a reaction mixture comprising the silicone compound of claim 1 .
6. The composition of claim 5 wherein the reaction mixture from which the gel material (A) is formed comprises an organic monomer, which is chosen from a vinylic monomer, an acrylamide monomer, an acrylic monomer, or a combination of two or more thereof.
7. The composition of claim 6 , wherein (a) the vinylic monomer is chosen from N-vinyl-pyrrolidone, N-vinyl-caprolactam, N-vinyl-acetamide, N-vinyl-formamide, N-vinyl-isopropylamide, vinyl benzene, vinyl naphthalene, vinyl pyridine, vinyl alcohol, vinyl containing silicone, or a combination of two or more thereof (b) the acrylic monomer is chosen from 2-hydroxy-ethyl-methacrylate (HEMA), 2-hydroxy-ethyl-acrylate (HEA), hydroxyl propyl methacrylate, trimethylammonium 2-hydroxy propyl methacrylate hydrochloride, dimethylaminoethyl methacrylate, glycerol methacrylate, N,N-dimethylacrylamide, N-isopropylacrylamide, acrylamide, methacrylamide, acrylic acid, methacrylic acid, acrylated hydrophilic or hydrophobic organo-silicone, or a combination of two or more thereof.
8. The composition of claim 5 , wherein the reaction mixture from which the hydrogel material (A) is formed further comprises (i) optionally an active ingredient that is reactive or non-reactive to actinic curing conditions; and (ii) optionally, an organic monomer, an organic macromer, a reactive polymer, a cross-linker, a compatibilizer, a tinting agent, an initiator, or a combination of two or more thereof.
9. The composition of claim 8 , wherein the silicone compound of Formula (I) is present in an amount of from about 1 weight percent to about 99 weight percent of the composition.
10. The composition of claim 5 , wherein the ratio of the silicone compound of Formula (I) to organic monomer is about 1:99 to 99:1.
11. The composition of claim 5 , wherein the active substance (B) is chosen from an agent affecting the central nervous system, an antiallergic agent, a cardiovascular agent, an agent affecting respiratory organs, an agents affecting digestive organ, hormone preparations, an agent affecting metabolism, an antitumor agent, an antibiotic preparation, a chemotherapeutic, an antimicrobial, a local anesthetic, an antihistaminic, antiphlogistic, an astringent, an ophthalmically-active drug, a vitamin, an antifungal agent, a peripheral nervous anesthetic, a vasodilator, a crude drug essence, a tincture, a crude drug powder, a hypotensive agent, an immunosuppressant, a lubricating agent, a wetting agent or a combination of two or more thereof.
12. The composition of claim 11 , wherein the ophthalmically active drug is chosen from pilocarpine, epinephrine, tetracycline, phenylephrine, eserine, phospholine iodide, demecarium bromide, cyclopentolate, homatropine, scopolamine, chlortetracycline, bacitracin, neomycin, polymixin, gramicidin, oxytetracycline, chloramphenicol, gentamycin, penicillin, erythromycin, carbachol, sulfacetamide, polymixin B, idoxuridine, isoflorophate, fluoromethalone, dexamethasone, hydrocortisone, hydrocortisone acetate, dexamethasone 21-phosphate, fluorocinolone, medrysone, prednisolone, methyl prednisolone, prednisolone 21-phosphate, prednisolone acetate, betamethasone, Ibuprofen, Flurbiprofen, Cloricromene, Diclofenac diethyl ammonium, Piroxicam, Methylprednisolonem, triamcinolone, timolol maleate, ketotifen fumarate, moxifloxacin hydrochloride monohydrate or a combination of two or more thereof.
13. A gel formed from the composition of any of claim 5 .
14. The gel of claim 13 , wherein the gel is in the form of a film.
15. A hydrogel formed from the composition of claim 5 .
16. The hydrogel of claim 15 , wherein the hydrogel comprises an active ingredient.
17. The hydrogel of claim 15 in the form of a contact lens.
18. A contact lens comprising the hydrogel of claim 15 .
19. An actives delivery system comprising the hydrogel of claim 15 .
20. The actives delivery system of claim 19 , wherein the hydrogel material is a hydrogel film.
21. The actives delivery system of claim 19 , wherein the hydrogel material is in the form of a contact lens.
22. A contact lens comprising the actives delivery system of claim 19 .
23. A medical device comprising the actives delivery system of claim 19 disposed on a surface thereof.
24. The medical device of claim 23 , wherein the device is chosen from a probe, a wand, a film, a band, a patch, a contact lens, or an insert.