Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-01-04
1976-06-29
Turer, Richard B.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260876R, 264 1, 351160, 526227, 526320, C08L 3102
Patent
active
039668479
ABSTRACT:
A plastic or resin product is obtained by mixing polyvinylpyrrolidone, modifiers and additives such as organic methacrylates, and crosslinking agents, and optionally catalysts, and causing polymerization to take place. The inventive product is insoluble in water but is hydratable with water, depending upon the proportions of the above mentioned components, and may take up in its structure as little as 5% by weight of water to as high as 90% by weight of water. The inventive hydrated product is optionally transparent, translucent, or opaque, and produced in any shape or size, depending only on the mold in which it is cast. The transparent product is especially suitable for contact lenses. The translucent and opaque products may be fabricated into membranes with pore sizes that can be made selectively, or cast into useful shapes and for other uses.
REFERENCES:
patent: 3520949 (1970-07-01), Shepherd et al.
patent: 3621079 (1971-11-01), Leeds
patent: 3639524 (1972-02-01), Seiderman
patent: 3647736 (1972-03-01), Ewell
patent: 3700761 (1972-10-01), O'Driscoll et al.
patent: 3721657 (1973-03-01), Seiderman
patent: 3822196 (1974-07-01), O'Driscoll et al.
LandOfFree
Contact lens from hydrophilic gel polymers of polyvinylpyrrolido does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contact lens from hydrophilic gel polymers of polyvinylpyrrolido, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact lens from hydrophilic gel polymers of polyvinylpyrrolido will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1278110