Coating base for solid enteric pharmaceutical preparations

Details Coating base for solid enteric pharmaceutical preparations Coating base for solid enteric pharmaceutical preparations

1995-11-07

1998-07-07

Harrison, Robert H.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

1061811, 424480, 536 56, 536 89, A61K 932, C08B 1100

Patent

active

057765014

ABSTRACT:
The present invention provides a base for coating a solid enteric pharmaceutical preparation whose dissolution pH ranges from 3 to 4. The coating base is a cellulose acetate maleate which is prepared by substituting a water-soluble cellulose derivative with 0.25 to 0.5 acetyl group and 0.35 to 0.6 maleyl group per glucose ring of the cellulose derivative. The cellulose acetate maleate has a dissolution pH ranging from 3 to 4.

REFERENCES:
patent: 2093462 (1937-09-01), Malm et al.
patent: 3789117 (1974-01-01), Tsujino
patent: 3816150 (1974-06-01), Ishii et al.
patent: 3968277 (1976-07-01), Takase
patent: 4661162 (1987-04-01), Kurihara et al.
patent: 5540945 (1996-07-01), Ikushima

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