Hydrophilic or hydrogel carrier systems such as coatings, body i

Details Hydrophilic or hydrogel carrier systems such as coatings, body i Hydrophilic or hydrogel carrier systems such as coatings, body i

1974-06-25

1976-08-17

Cockeram, H.S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

3 1, 3 14, 3 15, 3 191, 128348, 128350R, 128127, 128334R, 260 25AD, 260 25A, 260 326N, 260 75NK, 260 775AP, 260 775AQ, 260 75NQ, 260 775AS, 260 775AR, 260 2EN, 424 78, 424 81, 428425, C08G 1848, C08G 1830, C08G 1832, A61F 100

Patent

active

039753506

ABSTRACT:
Improved active agent systems with novel carriers as membrane, release, and coating polymers for said active agents; the polymers are water absorptive polyurethane polymers prepared from resins having a low ratio of carbon to oxygen to nitrogen or having ionic, quaternary ammonium or salt groups in the resin backbone and a low amount of isocyanate; the water absorptivity of the polyurethane polymers is above 10%, preferably above 20%, and these polymers may range to completely gel-like, high water absorbtive polymers; these active agent polymers are useful as in medicinal, insecticidal, pesticidal, algaecidal, etc. applications; as well as zero release agents, body implants and coatings requiring hydrophilic properties; other use for the active agent systems are in sensing membranes or coatings or ion transport recognition devices such as in gaseous or liquid media; as a hydrogel providing a leachable matrix wherein the leaching agent may be body fluids, e. g., animals or human, e. g., productive livestock and domestic animals and/or pets, or animals used in medicinal or veterinary research, e. g., monkeys, mice, dogs, hamsters, rabbits, guinea pigs, cats, etc.

REFERENCES:
patent: 1968136 (1934-07-01), Gardner
patent: 3129888 (1964-04-01), O'Hagan
patent: 3247841 (1966-04-01), Cook
patent: 3497990 (1970-03-01), Jeffries
patent: 3536260 (1970-10-01), Volz
patent: 3627735 (1971-12-01), Trapasso
patent: 3706678 (1972-12-01), Dietrich et al.
patent: 3806474 (1974-04-01), Blair
patent: 3819405 (1974-06-01), Engle
patent: 3822238 (1974-07-01), Blair et al.
patent: 3939123 (1976-02-01), Matthews et al.

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