Surface modified surgical instruments, medical devices, implants, contact lenses and the like
First Claim
1. In a method for modifying a plastic surface of an article, said surface adapted for contact with living tissue of a human or non-human animal, by the gamma-irradiation induced polymerized, chemically grafted coating thereon of:
- (1) a monomer comprising N-vinylpyrrolidone (NVP),(2) a monomer comprising2-hydroxyethylmethacrylate (HEMA),(3) a mixture of (NVP) and (HEMA), (NVP-HEMA), or(4) a mixture of (1), (2) or (3) with up to about 50 wt. %, based on the total monomer weight, of an ionic monomer, salt of an ionic monomer or mixture thereof, so as to form a hydrophilic graft polymer coating of (i) polyvinylpyrrolidone (PVP), (ii) poly-2-hydroxyethylmethacrylate (PHEMA), (iii) a copolymer of (NVP) and (HEMA), or (iv) a copolymer of (NVP), (HEMA) or (NVP-HEMA) and said ionic monomer on said surface, the improvement comprising;
conducting said gamma-irradiation induced graft polymerization in an aqueous solution under the following conditions;
(a) monomer concentration in the range of from about 0.1% to about 50%, by weight;
(b) total gamma dose in the range of from about 0.001 to less than about 0.50 Mrad; and
(c) gamma dose rate in the range of from above 2,500 to about 108 rads/minute.
2 Assignments
0 Petitions
Accused Products
Abstract
Improved medical devices and instruments prepared by an improved method of producing hydrophilic, gamma-irradiation induced polymerized and chemically grafted coatings on plastic surfaces of articles adapted for contacting living tissue, the improvement comprising carrying out the graft polymerization in an aqueous solution under specific combinations of the following conditions:
(a) monomer concentration in the range of from about 0.1% to about 50%, by weight;
(b) total gamma dose in the range of from about 0.001 to less than about 0.50 Mrad; and
(c) gamma dose rate in the range of from above about 2,500 to about 108 rads/minute.
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Citations
16 Claims
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1. In a method for modifying a plastic surface of an article, said surface adapted for contact with living tissue of a human or non-human animal, by the gamma-irradiation induced polymerized, chemically grafted coating thereon of:
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(1) a monomer comprising N-vinylpyrrolidone (NVP), (2) a monomer comprising2-hydroxyethylmethacrylate (HEMA), (3) a mixture of (NVP) and (HEMA), (NVP-HEMA), or (4) a mixture of (1), (2) or (3) with up to about 50 wt. %, based on the total monomer weight, of an ionic monomer, salt of an ionic monomer or mixture thereof, so as to form a hydrophilic graft polymer coating of (i) polyvinylpyrrolidone (PVP), (ii) poly-2-hydroxyethylmethacrylate (PHEMA), (iii) a copolymer of (NVP) and (HEMA), or (iv) a copolymer of (NVP), (HEMA) or (NVP-HEMA) and said ionic monomer on said surface, the improvement comprising; conducting said gamma-irradiation induced graft polymerization in an aqueous solution under the following conditions; (a) monomer concentration in the range of from about 0.1% to about 50%, by weight; (b) total gamma dose in the range of from about 0.001 to less than about 0.50 Mrad; and (c) gamma dose rate in the range of from above 2,500 to about 108 rads/minute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification