Fine particulate cross-linked type N-vinylamide resin

Details Fine particulate cross-linked type N-vinylamide resin Fine particulate cross-linked type N-vinylamide resin

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.

REFERENCES:
patent: 4123275 (1978-10-01), Karino et al.
patent: 4268604 (1981-05-01), Yoshida et al.
patent: 4396706 (1983-08-01), Ishii et al.
patent: 5280095 (1994-01-01), Aizawa et al.
patent: 5338815 (1994-08-01), Aizawa et al.
patent: 5599898 (1997-02-01), Hartmann et al.

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