Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Particulate form
Patent
1997-12-31
1999-10-19
Webman, Edward J.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Particulate form
424487, 514944, 514952, A61K 916, A61K 910, A61K 4732, A01N 2512
Patent
active
059685557
ABSTRACT:
A fine particulate cross-linked N-vinylamide resin having an average particle size of not more than 10 .mu.m comprising a compound (I) and a compound (II) cross-linked by a cross-linking agent: ##STR1## wherein, R.sup.1 to R.sup..ident. may be the same or different and represent a hydrogen atom, methyl group, or ethyl group, X is a C.sub.2 or C.sub.3 alkylene group, and n is an integer of 2 to 30 and the weight ratio of (I):(II) is 70 to 99.9:30 to 0.1, and the microgel composed thereof.
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patent: 5599898 (1997-02-01), Hartmann et al.
Showa Denko K.K.
Webman Edward J.
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