Grafting of biocompatible hydrophilic polymers onto inorganic and metal surfaces
First Claim
1. A method of grafting hydrophilic polymers to a surface of an article comprising the steps of:
- (a) providing an article having a plurality of hydroxyl or oxide groups attached to a surface of said article;
(b) exposing said surface to a silanated hydrophilic polymer that has the structure;
##STR14## wherein at least one of said R4, R5, and R6 is a hydrolyzable group each containing 1 to 6 carbon atoms, with the other(s) being nonhydrolyzable alkyl groups each containing 1 to 4 carbons, X is selected from an alkyl group, aryl group that is unsubstitued or substituted by one or more C1-20 alkyl groups, L is a linking moiety having one or more linking groups that is selected from amide (--C(O)NH--), ester (--C(O)O--), urea (--NHC(O)NH--), urethane (--OC(O)NH--), ether (--O--), thioether(--S--), thiocarbamate (--OC(S)NH--), amine (--NH--), and mixture thereof provided that when L comprises more than one linking group, each is separated from the next by --(CH2)m --, wherein m is an integer from 1 to 20, μ
is 0 or 1, and Y is a hydrophilic polymer; and
(c) hydrolyzing the silanated hydrophilic polymer to form a silane layer; and
(d) curing the silane layer to cause the silane layer to be covalently bonded to the surface of the article.
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Accused Products
Abstract
Methods for grafting unmodified PEO or any other water-soluble polymers to the surfaces of metals and glasses to form biocompatible surfaces having low protein affinity is provided. One technique includes the steps of: (a) providing a support member having a plurality of hydroxyl or oxide groups attached to a surface of said support member; (b) exposing said surface to a silane coupling agent to cause the silane coupling agent to form a silane layer that is covalently bound to the surface wherein the silane layer comprises a plurality of vinyl groups; and (c) exposing the silane layer to a hydrophilic polymer and causing the silane layer to react with the hydrophilic polymer to covalently bond to the silane layer. Exposure of the silane layer to γ-radiation to induce grafting with low radiation to induce grafting of the hydrophilic polymer to the silane layer. Another technique comprises grafting a silylated hydrophilic polymer or chain having a hydrophobic domain directly to the metal or inorganic surface.
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Citations
16 Claims
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1. A method of grafting hydrophilic polymers to a surface of an article comprising the steps of:
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(a) providing an article having a plurality of hydroxyl or oxide groups attached to a surface of said article; (b) exposing said surface to a silanated hydrophilic polymer that has the structure;
##STR14## wherein at least one of said R4, R5, and R6 is a hydrolyzable group each containing 1 to 6 carbon atoms, with the other(s) being nonhydrolyzable alkyl groups each containing 1 to 4 carbons, X is selected from an alkyl group, aryl group that is unsubstitued or substituted by one or more C1-20 alkyl groups, L is a linking moiety having one or more linking groups that is selected from amide (--C(O)NH--), ester (--C(O)O--), urea (--NHC(O)NH--), urethane (--OC(O)NH--), ether (--O--), thioether(--S--), thiocarbamate (--OC(S)NH--), amine (--NH--), and mixture thereof provided that when L comprises more than one linking group, each is separated from the next by --(CH2)m --, wherein m is an integer from 1 to 20, μ
is 0 or 1, and Y is a hydrophilic polymer; and(c) hydrolyzing the silanated hydrophilic polymer to form a silane layer; and (d) curing the silane layer to cause the silane layer to be covalently bonded to the surface of the article. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
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4. A method of grafting hydrophilic polymers to a surface of an article comprising the steps of:
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(a) providing an article having a plurality of hydroxyl or oxide groups on a surface thereof; (b) exposing said surface to a silanated hydrophilic polymer selected from the group consisting of 8-(m-PEO)octyltrimethoxysilane, 8-(m-PEO)octyltriethoxysilane, 4-(m-PEO)butyltrimethoxysilane, 4-(m-PEO)butyltriethoxysilane, 3-(m-PEO)propyltrimethoxysilane, 3-(m-PEO)propyltriethoxysilane, triethoxysilylpropyl m-PEO carbamate, trimethoxysilylpropyl m-PEO carbamate, trimethoxysilylpropylureidododecylureido m-PEO carbamate, triethoxysilylpropylureidodecylureido m-PEO carbamate, triethoxysilylpropyluredecylureido m-PEO carbamate, trimethoxysilylpropylureidodecylureido m-PEO carbamate, trimethoxysilylpropylthioundecyl m-PEO 1,6-dicarbamatohexane, trimethoxysilylpropylthioundecyl m-PEO 1,4-dicarbamatobutane, trimethoxysilylpropylthioundecyl m-PEO 1,8-dicarbamatooctane, trimethoxysilylpropylthioundecyl m-PEO 1,12-dicarbamatododecane, triethoxysilylpropylthioundecyl m-PEO 1,6-dicarbamatohexane, triethoxysilylpropylthioundecyl m-PEO, 1,4-dicarbamatobutane, triethoxysilylpropylthioundecyl m-PEO 1,8-dicarbamatooctane, triethoxysilylpropylthioundecyl m-PEO 1,12-dicarbamatododecane, and mixtures thereof; (c) hydrolyzing the silanated hydrophilic polymer to form a silane layer; and (d) curing the silane layer to cause the silane layer to be covalently bonded to the surface of the article.
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12. A device having a biocompatible surface that has hydrophilic polymers grafted onto the surface and having been fabricated by a process comprising the steps of:
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(a) providing a device having a plurality of hydroxyl or oxide groups on a surface thereof; (b) exposing said surface to a silanated hydrophic polymer selected from the group consisting of the group containing 8-(m-PEO)octyltrimethoxysilane, 8-(m-PEO)octyltriethoxysilane, 4-(m-PEO)butyltrimethoxysilane, 4-(m-PEO)butyltriethoxysilane, 3-(m-PEO)propyltrimethoxysilane, 3-(m-PEO)propyltriethoxysilane, triethoxysilylpropyl m-PEO carbamate, trimethoxysilylpropyl m-PEO carbamate, trimethoxysilylpropylureidododecylureido m-PEO carbamate, triethoxysilylpropylureidodecylureido m-PEO carbamate, triethoxysilylpropylureidecylureido m-PEO carbamate, trimethoxysilylpropylureidodecylureido m-PEO carbamate, trimethoxysilylpropylthioundecyl m-PEO 1,6-dicarbamatohexane, trimethoxysilylpropylthioundecyl m-PEO, 1,4-dicarbamatobutane, trimethoxysilylpropylthioundecyl m-PEO 1,8-dicarbamatooctane, trimethoxysilylpropylthioundecyl m-PEO 1,12-dicarbamatododecane, triethoxysilylpropylthioundecyl m-PEO 1,16-dicarbamatohexane, triethoxysilylpropylthioundecyl m-PEO, 1,4-dicarbamatobutane, triethoxysilylpropylthioundecyl m-PEO 1,8-dicarbamatooctane, triethoxysilylpropylthioundecyl m-PEO 1,12-dicarbamatododecane, and mixtures thereof; and (c) curing the silane layer to cause the silane layer to be covalently bonded to the surface of the device.
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13. A method of grafting hydrophilic polymers to a surface of an article comprising the steps of:
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(a) providing an article having a plurality of hydroxy or oxide groups attached to a surface of said article; (b) exposing said surface to trichlorovinylsilane to form a silane layer that is covalently bound to the surface; and (c) exposing the silane layer to a hydrophilic polymer selected from the group consisting of poly(ethylene oxide) (PEO), polyhydroxyethylmethacrylate (PHEMA), PEO-containing block copolymers, and mixtures thereof and causing the silane layer to react with the hydrophilic polymer to covalently bond to the silane layer. - View Dependent Claims (15, 16)
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14. A device having a biocompatible surface that has hydrophilic polymers grafted onto the surface and having been fabricated by a process comprising the steps of:
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(a) providing a device having a plurality of hydroxyl or oxide groups attached to a surface of said device; (b) exposing said surface to trichlorovinylsilane to form a silane layer that is covalently bound to the surface wherein the silane layer comprises a plurality of vinyl groups; and (c) exposing the silane layer to a hydrophilic polymer of poly(ethylene oxide) and causing the silane layer to react with poly(ethylene oxide) to covalently bond to the silane layer.
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Specification