Polymeric surface coatings
First Claim
1. A process comprising the steps of coating a substrate with a coating composition consisting of a solvent and a polymer dissolved or dispersed in the solvent and drying the composition to leave a coating of the polymer on the substrate whereby the biocompatibility of the coating is improved, said polymer being formed by copolymerizing i) a zwitterionic monomer of formula I'"'"' ##STR21## wherein:
- R is hydrogen or a C1-4 alkyl group;
A is --O-- or ---NR1 -- where R1 is selected from the group consisting of hydrogen, a C1-4 -alkyl group and BX where B and X are defined below;
B is selected from the group consisting of an alkylene --(CR32)a wherein the groups --(CR32)-- are the same or different and in each group (CR32) the groups R3 are the same or different and each group R3 is hydrogen or a C1-4 -alkyl and a is 1 to 12;
an alkoxyalkyl group having 1 to 6 carbon atoms in each alkyl moiety; and
an oligooxaalkylene group --c(CR42)b -- where the groups --(CR42)-- are the same or different and in each group --(CR42)-- the groups R4 are the same or different and each R4 is hydrogen or a C1-4 -alkyl, b is 1 to 6 and C is 2 to 11; and
X is an ammonium phosphate ester zwitterionic group;
withii) a comonomer of 7 formula VI'"'"' ##STR22## wherein R14 is hydrogen or a C1-4 alkyl;
A1 is --O-- or --NR15 --, where R15 is selected from the group consisting of hydrogen, a C1-4 group and Q; and
Q is a straight or branched alkyl group containing 6 to 24 carbon atoms.
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Accused Products
Abstract
Polymers of one or more radical polymerizable monomers which polymer has pendant groups bearing a center of permanent positive charge and other pendant groups capable of stably binding the polymer to a surface are useful in the treatment of surfaces to render them biocompatible. The polymers may contain pendant groups which bind the polymer to a surface by physisorption, covalent bonding or ionic interactions. Additionally reactive groups in the polymer may serve as points for attachment of ligands to the polymer when coated on a surface.
82 Citations
42 Claims
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1. A process comprising the steps of coating a substrate with a coating composition consisting of a solvent and a polymer dissolved or dispersed in the solvent and drying the composition to leave a coating of the polymer on the substrate whereby the biocompatibility of the coating is improved, said polymer being formed by copolymerizing i) a zwitterionic monomer of formula I'"'"' ##STR21## wherein:
- R is hydrogen or a C1-4 alkyl group;
A is --O-- or ---NR1 -- where R1 is selected from the group consisting of hydrogen, a C1-4 -alkyl group and BX where B and X are defined below; B is selected from the group consisting of an alkylene --(CR32)a wherein the groups --(CR32)-- are the same or different and in each group (CR32) the groups R3 are the same or different and each group R3 is hydrogen or a C1-4 -alkyl and a is 1 to 12;
an alkoxyalkyl group having 1 to 6 carbon atoms in each alkyl moiety; and
an oligooxaalkylene group --c(CR42)b -- where the groups --(CR42)-- are the same or different and in each group --(CR42)-- the groups R4 are the same or different and each R4 is hydrogen or a C1-4 -alkyl, b is 1 to 6 and C is 2 to 11; andX is an ammonium phosphate ester zwitterionic group;
withii) a comonomer of 7 formula VI'"'"' ##STR22## wherein R14 is hydrogen or a C1-4 alkyl; A1 is --O-- or --NR15 --, where R15 is selected from the group consisting of hydrogen, a C1-4 group and Q; and Q is a straight or branched alkyl group containing 6 to 24 carbon atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 38, 39, 40, 41, 42)
- R is hydrogen or a C1-4 alkyl group;
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15. A polymerization process comprising copolymerizing
i) a zwitterionic monomer of formula I'"'"' ##STR23## wherein: - R is hydrogen or a C1-4 alkyl group;
A is --O-- or --NR1 -- where R1 is selected from the group consisting of hydrogen, a C1-4 -alkyl group and BX where B and X are defined below; B is selected from the group consisting of an alkylene group --(CR32)a wherein the groups --(CR32)-- are the same or different and in each group (CR32) the groups R3 are the same or different and each group R3 is hydrogen or a C1-4 -alkyl and a is 1 to 12;
an alkoxyalkyl group having 1 to 6 carbon atoms in each alkyl moiety; and
an oligooxaalkylene group --c(CR42)b -- where the groups --(CR42)-- are the same or different and in each group --(CR42)-- the groups R4 are the same or different and each R4 is hydrogen or a C1-4 -alkyl, b is 1 to 6 and C is 2 to 11; andX is an ammonium phosphate ester zwitterionic group;
withii) a comonomer of 7 formula VI'"'"' ##STR24## wherein R14 is hydrogen or a C1-4 alkyl; A1 is --O-- or --NR15 --, where R15 is selected from the group consisting of hydrogen, a C1-4 group and Q; and Q is a straight or branched alkyl group containing 6 to 24 carbon atoms. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- R is hydrogen or a C1-4 alkyl group;
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29. A polymer formed by copolymerising monomers consisting of:
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i) a zwitterionic monomer of formula I" ##STR26## wherein R is hydrogen or methyl, a is 1 to 6 e is 1 to 4 each R7 is lower alkyl, and ii) a comonomer of formula VI" ##STR27## R14 is hydrogen or methyl;
Q is an alkyl group having 12 to 24 carbon atoms,said polymer having a molecular weight in the range 20,000 to 1 million, the molar ratio of the zwitterionic monomer of formula I" to the comonomer of formula VI" being in the range (5;
95) to (50;
50). - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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30. A polymer according to claim 30 in which each R7 is methyl.
Specification