COATED POROUS MATERIALS
First Claim
1. A coated porous material comprising:
- a) a porous substrate comprising a plurality of pores extending through the substrate from a first major surface to a second major surface, each pore comprising an inner pore wall defining the internal dimension of the pore; and
b) a hydrophilic coating on a plurality of the pore walls, the hydrophilic coating comprising ethylene vinyl alcohol copolymer and at least one crosslinked polymer in a single layer;
wherein the hydrophilic coating comprises an interpenetrating polymer network of ethylene vinyl alcohol copolymer and the crosslinked polymer.
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Accused Products
Abstract
A coated porous material and a method for making the same. The coated porous material includes a porous substrate having a plurality of pores. A hydrophilic coating including, in a single layer, ethylene vinyl alcohol copolymer and at least one crosslinked polymer, is present on a plurality of inner pore walls. The method includes: (a) providing a porous substrate; (b) applying a coatable composition to at least a portion of the inner pore walls of the porous substrate, the coatable composition made of ethylene vinyl alcohol copolymer, at least one polymerizable compound and solvent; (c) removing at least a portion of the solvent from the coatable composition to dry the coatable composition; (d) saturating the porous substrate and the coatable composition with a rewetting solution; and (e) polymerizing the polymerizable compound to form the hydrophilic coating on the pore walls and to provide the coated porous material.
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Citations
27 Claims
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1. A coated porous material comprising:
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a) a porous substrate comprising a plurality of pores extending through the substrate from a first major surface to a second major surface, each pore comprising an inner pore wall defining the internal dimension of the pore; and b) a hydrophilic coating on a plurality of the pore walls, the hydrophilic coating comprising ethylene vinyl alcohol copolymer and at least one crosslinked polymer in a single layer; wherein the hydrophilic coating comprises an interpenetrating polymer network of ethylene vinyl alcohol copolymer and the crosslinked polymer. - View Dependent Claims (2, 4, 5, 6, 7, 8)
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3. (canceled)
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9. (canceled)
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10. A process for the preparation of a coated porous material, the process comprising:
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(a) providing a porous substrate comprising a plurality of pores extending through the substrate from a first major surface to a second major surface, each pore comprising an inner pore wall defining the internal dimension of the pore; (b) applying a coatable composition to at least a portion of the inner pore walls of the porous substrate, the coatable composition comprising ethylene vinyl alcohol copolymer, at least one polymerizable compound and solvent; (c) removing at least a portion of the solvent from the coatable composition to dry the coatable composition; (d) saturating the porous substrate and the coatable composition with a rewetting solution; and (e) polymerizing the polymerizable compound to form a hydrophilic coating on the pore walls and to provide the coated porous material, the hydrophilic coating comprising both the ethylene vinyl alcohol copolymer and a crosslinked polymer in a single layer; wherein the step (e) of polymerizing the polymerizable compound results in the hydrophilic coating comprising both the ethylene vinyl alcohol copolymer and a crosslinked polymer in an interpenetrating polymer network. - View Dependent Claims (11, 12, 13, 14, 15, 16, 20, 21, 22, 24, 25, 26)
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17. (canceled)
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18. (canceled)
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19. (canceled)
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23. (canceled)
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27. (canceled)
Specification