Method for providing enteric coatings on solid dosage forms

Details Method for providing enteric coatings on solid dosage forms Method for providing enteric coatings on solid dosage forms

1975-06-09

1977-04-12

Smith, Ronald H.

Coating processes

Fraud or tamper detecting

424 33, 424 35, A61K 900, A61K 1500, A61K 2100

Patent

active

040176479

ABSTRACT:
Enteric coatings are provided on solid pharmaceutical dosage forms by a method comprising covering the dosage froms with an aqueous solution of a polymeric substance having carboxyl groups in the watersoluble salt form and contacting the thus coated dosage forms with an inorganic acid to convert the polymeric substance into the water-insoluble acid form. The coating solution includes no organic solvent, and this method is safe from dangers of fires or explosions and air pollution.

REFERENCES:
patent: 3030273 (1962-04-01), Zagnoli
patent: 3196827 (1965-07-01), Wurster et al.
patent: 3256111 (1966-06-01), Singiser
patent: 3303051 (1967-02-01), Paul
patent: 3420931 (1969-01-01), Daum et al.
patent: 3427182 (1969-02-01), Zingerman
patent: 3573966 (1971-04-01), Hostetler
patent: 3896108 (1975-07-01), Klug

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