Hydrophilic coating of surfaces of polymeric substrates
First Claim
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1. A process for producing a hydrophilic coating on a polymer substrate comprising:
- (a) activating the polymer substrate by exposure to monochromatic, continuous UV radiation in the presence of oxygen and of a wavelength sufficient to provide hydroperoxide groups on the substrate;
(b) immersing said activated substrate in a solution of at least one hydrophilic group-containing vinyl monomer; and
(c) subjecting the immersed, activated substrate to monochromatic, continuous UV radiation of a wavelength sufficient to dissociate said hydroperoxide groups and induce graft copolymerization of the vinyl monomer onto the substrate.
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Abstract
A hydrophilic coating on a polymeric substrate is prepared by subjecting at least one hydrophilic vinyl monomer to radiation-induced graft polymerization on an activated substrate surface.
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12 Claims
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1. A process for producing a hydrophilic coating on a polymer substrate comprising:
- (a) activating the polymer substrate by exposure to monochromatic, continuous UV radiation in the presence of oxygen and of a wavelength sufficient to provide hydroperoxide groups on the substrate;
(b) immersing said activated substrate in a solution of at least one hydrophilic group-containing vinyl monomer; and
(c) subjecting the immersed, activated substrate to monochromatic, continuous UV radiation of a wavelength sufficient to dissociate said hydroperoxide groups and induce graft copolymerization of the vinyl monomer onto the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- (a) activating the polymer substrate by exposure to monochromatic, continuous UV radiation in the presence of oxygen and of a wavelength sufficient to provide hydroperoxide groups on the substrate;
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10. A process for producing a hydrophilic coating on a polymer substrate comprising:
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(a) activating the polymer substrate by copolymerizing the monomer or monomers forming said substrate with a vinyl comonomer containing a group sensitive to UV radiation; (b) immersing the activated substrate in a solution of at least one hydrophilic group-containing vinyl monomer; and
(c) subjecting the immersed, activated substrate to UV radiation to induce graft copolymerization of the vinyl monomer onto the substrate. - View Dependent Claims (11, 12)
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