An article comprising: a coating composition comprising a vinyl polymer having a plurality of pendant groups, the vinyl polymer comprising the structure of formula wherein R 1 is H or CH 3; R 2 is COO, CO, C 1 -C 12 alkyl, or aryl; R 3 is a cationic group having the formula -(CH 2) n -N(R 7)(R 8)(R 9)(X -) wherein n is 1-3, R 7, R 8, and R 9 are independently an alkyl (C 1 -C 22), aryl, or a combination of chemical groups forming a ring structure and up to 2 of R 7, R 8, and R 9 may be H; and X is Cl, Br, N(SO 2 CF 3) 2, BF 4, OSO 2 C 4 F 9, OSO 2 CF 3, OSO 3 CH 3; R 4 is an unsubstituted or substituted alkyl group (C 4 to C 22), an aryl group, perfluoroalkyl sulfonamide, perfluoroalkyl sulfone, perfluoroalkyl carboxamide, a class of free-radically reactive fluoroalkyl or fluoroalkylene group-containing compatibilizers of the respective chemical formulas: R ff Q 3 (X 1) n1 and (X 1) n1 Q 3 R ff2 Q 3 (X 1) n1), wherein R ff is a fluoroalkyl, R ff2 is a fluoroalkylene, Q 3 is a connecting group of valency at least 2 and is selected from the group consisting of a covalent bond, an alkylene, an arylene, an aralkylene, an alkarylene group, a straight or branched chain or cycle-containing connecting group optionally containing heteroatoms such as O, N, and S and optionally a heteroatom-containing functional group such as carbonyl or sulfonyl, and combinations thereof; X 1 is a free-radically reactive group selected from (meth)acryl, -SH, allyl, or vinyl groups, and n1 is independently 1 to 3; and R 5 is (CH 2) m -Si(OR 10) 3 wherein m is 1-6 and R 10 is an alkyl group from C 1 -C 3; and a medical device comprising an elastomeric first substrate having a patient-contact first surface and a second surface; wherein the vinyl polymer is durably adhered to the patient-contact first surface, and wherein the composition is essentially free of inorganic filler. a coating composition comprising a vinyl polymer having a plurality of pendant groups, the vinyl polymer comprising the structure of formula wherein R 1 is H or CH 3; R 2 is COO, CO, C 1 -C 12 alkyl, or aryl; R 3 is a cationic group having the formula -(CH 2) n -N(R 7)(R 8)(R 9)(X -) wherein n is 1-3, R 7, R 8, and R 9 are independently an alkyl (C 1 -C 22), aryl, or a combination of chemical groups forming a ring structure and up to 2 of R 7, R 8, and R 9 may be H; and X is Cl, Br, N(SO 2 CF 3) 2, BF 4, OSO 2 C 4 F 9, OSO 2 CF 3, OSO 3 CH 3; R 4 is an unsubstituted or substituted alkyl group (C 4 to C 22), an aryl group, perfluoroalkyl sulfonamide, perfluoroalkyl sulfone, perfluoroalkyl carboxamide, a class of free-radically reactive fluoroalkyl or fluoroalkylene group-containing compatibilizers of the respective chemical formulas: R ff Q 3 (X 1) n1 and (X 1) n1 Q 3 R ff2 Q 3 (X 1) n1), wherein R ff is a fluoroalkyl, R ff2 is a fluoroalkylene, Q 3 is a connecting group of valency at least 2 and is selected from the group consisting of a covalent bond, an alkylene, an arylene, an aralkylene, an alkarylene group, a straight or branched chain or cycle-containing connecting group optionally containing heteroatoms such as O, N, and S and optionally a heteroatom-containing functional group such as carbonyl or sulfonyl, and combinations thereof; X 1 is a free-radically reactive group selected from (meth)acryl, -SH, allyl, or vinyl groups, and n1 is independently 1 to 3; and R 5 is (CH 2) m -Si(OR 10) 3 wherein m is 1-6 and R 10 is an alkyl group from C 1 -C 3; and R 1 is H or CH 3; R 2 is COO, CO, C 1 -C 12 alkyl, or aryl; R 3 is a cationic group having the formula -(CH 2) n -N(R 7)(R 8)(R 9)(X -) wherein n is 1-3, R 7, R 8, and R 9 are independently an alkyl (C 1 -C 22), aryl, or a combination of chemical groups forming a ring structure and up to 2 of R 7, R 8, and R 9 may be H; and X is Cl, Br, N(SO 2 CF 3) 2, BF 4, OSO 2 C 4 F 9, OSO 2 CF 3, OSO 3 CH 3; n is 1-3, R 7, R 8, and R 9 are independently an alkyl (C 1 -C 22), aryl, or a combination of chemical groups forming a ring structure and up to 2 of R 7, R 8, and R 9 may be H; and X is Cl, Br, N(SO 2 CF 3) 2, BF 4, OSO 2 C 4 F 9, OSO 2 CF 3, OSO 3 CH 3; R 4 is an unsubstituted or substituted alkyl group (C 4 to C 22), an aryl group, perfluoroalkyl sulfonamide, perfluoroalkyl sulfone, perfluoroalkyl carboxamide, a class of free-radically reactive fluoroalkyl or fluoroalkylene group-containing compatibilizers of the respective chemical formulas: R ff Q 3 (X 1) n1 and (X 1) n1 Q 3 R ff2 Q 3 (X 1) n1), wherein R ff is a fluoroalkyl, R ff2 is a fluoroalkylene, Q 3 is a connecting group of valency at least 2 and is selected from the group consisting of a covalent bond, an alkylene, an arylene, an aralkylene, an alkarylene group, a straight or branched chain or cycle-containing connecting group optionally containing heteroatoms such as O, N, and S and optionally a heteroatom-containing functional group such as carbonyl or sulfonyl, and combinations thereof; X 1 is a free-radically reactive group selected from (meth)acryl, -SH, allyl, or vinyl groups, and n1 is independently 1 to 3; and R 5 is (CH 2) m -Si(OR 10) 3 wherein m is 1-6 and R 10 is an alkyl group from C 1 -C 3; and a medical device comprising an elastomeric first substrate having a patient-contact first surface and a second surface; wherein the vinyl polymer is durably adhered to the patient-contact first surface, and wherein the composition is essentially free of inorganic filler.