Articles prepared from water-based hydrophilic coating compositions
DCFirst Claim
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1. A coated article, comprising:
- an article having a hydrophilic coating thereon, said coating comprising;
a polyurethane polymer matrix, said polyurethane polymer having an equivalent weight of functional moiety pendant to the polyurethane backbone in the range of about 1000 to 2805 g/eq. and forming a three-dimensional network, said network consisting essentially of said polyurethane backbone and crosslinking bridges at said pendant functional moiety; and
a hydrophilic polymer, said hydrophilic polymer associated with said polyurethane polymer matrix, the polyurethane polymer matrix having a crosslink density such that the coating retains slip for up to 24 hours in ambient aqueous medium.
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Abstract
A water-based coating composition suitable for preparing hydrophilic surfaces on various articles is provided which includes a supporting polymer having functional moieties capable of undergoing crosslinking reactions, said supporting polymer soluble in or emulsified in an aqueous based medium; and a hydrophilic polymer, said hydrophilic polymer associated with the supporting polymer. The composition is characterized in that, when crosslinked at the functional moieties, the supporting polymer forms a three-dimensional network which substantially minimizes disassociation of the hydrophilic polymer.
193 Citations
14 Claims
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1. A coated article, comprising:
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an article having a hydrophilic coating thereon, said coating comprising;
a polyurethane polymer matrix, said polyurethane polymer having an equivalent weight of functional moiety pendant to the polyurethane backbone in the range of about 1000 to 2805 g/eq. and forming a three-dimensional network, said network consisting essentially of said polyurethane backbone and crosslinking bridges at said pendant functional moiety; and
a hydrophilic polymer, said hydrophilic polymer associated with said polyurethane polymer matrix, the polyurethane polymer matrix having a crosslink density such that the coating retains slip for up to 24 hours in ambient aqueous medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14)
one or more additives selected from the group consisting of co-solvents, plasticizers, anti-foaming agents, anti-crater agents, coalescing solvents, bioactive agents, antimicrobial agents, antithrombogenic agents, antibiotics, pigments, paint additives, radiopacifiers and ion conductors.
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13. The coated article of claim 1, wherein said functional pendant moiety comprises an organic acid moiety.
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14. The coated article of claim 1, wherein said polyurethane backbone comprises a condensation product with an organic acid, wherein said organic acid provides said acid functional moiety.
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12. A coated medical device, comprising:
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a medical device having a surface coated with a hydrophilic coating, said hydrophilic coating comprising;
a three-dimensional polyurethane polymer matrix, said polyurethane polymer having an equivalent weight of functional moiety pendant to the polyurethane backbone of about 1000 to 2805 g/eq. and forming a three-dimensional network, said network consisting essentially of said polyurethane backbone and crosslinking bridges at said pendent functional moiety; and
a poly(vinylpyrrolidone) hydrophilic polymer, said poly(vinylpyrrolidone) polymer associated with said polyurethane polymer, the polyurethane polymer matrix having a crosslink density such that the coating retains slip for up to 24 hours in ambient aqueous medium.
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Specification