Drug – bio-affecting and body treating compositions – Identification or warning feature – Taste or smell or chemical irritation to the eye – nose – or...
Patent
1984-05-03
1987-09-15
Friedman, Stanley J.
Drug, bio-affecting and body treating compositions
Identification or warning feature
Taste or smell or chemical irritation to the eye, nose, or...
424 80, 424 81, A61K 922, A61K 952, A61K 3178, A61K 3179
Patent
active
046938877
ABSTRACT:
Novel hydrogel compositions, comprised of a blend of two thermoplastic uncrosslinked polymers, one of which is hydrophobic, and the other hydrophilic, and having a microphase separated morphology are described. These hydrogel compositions are useful as devices for controlling the release rate of bioactive agents, such as therapeutic drugs, antimicrobials, contraceptive agents, or the like, in a biological environment. Depending upon the chemical nature of the agent to be released, its rate of release can be controlled by appropriate selection of the polymeric components of the blend and their relative ratios.
REFERENCES:
patent: 4085168 (1978-04-01), Milkovich et al.
patent: 4277582 (1981-07-01), Mueller et al.
patent: 4300820 (1981-11-01), Shah
Hasaka et al.
Okano et al.
Nakashima et al.
Friedman Stanley J.
Isaacs Alvin
The Kendall Company
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