Stock material or miscellaneous articles – Composite – Of polycarbonate
Patent
1987-09-02
1991-03-19
P., C.
Stock material or miscellaneous articles
Composite
Of polycarbonate
428421, 4284233, 4284235, 4284237, 4284244, 4284246, 4284248, 4284255, 4284256, 4284258, 428430, 428435, 428441, 428442, 428451, 428458, 428461, 428480, 428483, 428463, 4284749, 4284758, 4284761, 4284763, 4284769, 428516, 428517, 525303, B32B 2736
Patent
active
050010093
ABSTRACT:
The lubricious hydrophilic coatings of the invention include a hydrophilic polyolefin such as polyvinyl-pyrrolidone and a water-insoluble stabilizing polymer such as a cellulose ester. The coatings may also include an adherent polymer and a plasticizing agent. The coatings are significantly more lubricious when wet than when dry, are adherent to a variety of substrates, and are resistant to removal by wet abrasion. The coating method of the invention involves preparing a solution of the stabilizing polymer and a solution of the hydrophilic polyolefin, and coating the substrate first in one then the other. Alternatively, both the insolubilizing and hydrophilic polymers may be dissolved in a single solvent system and applied to the substrate in a single step. The solutions of the invention are stable, non-reactive, and non-hazardous. The coatings of the invention may be applied to biomedical devices and implants such as catheters, condoms, and nasogastric and endotracheal tubes.
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patent: 3939049 (1976-02-01), Ratner
patent: 3975350 (1976-08-01), Hudgin et al.
patent: 4038264 (1977-07-01), Rostoker et al.
patent: 4156066 (1979-05-01), Gould
patent: 4156067 (1979-05-01), Gould
patent: 4255550 (1981-05-01), Gould
patent: 4496535 (1985-01-01), Gould et al.
P. C.
Sterilization Technical Services, Inc.
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