COATING SOLUBLE OR SWELLABLE IN GASTRIC JUICE, AND ITS USE IN A PROCESS FOR COATING PHARMACEUTICAL PREPARATIONS

摘要

Coating materials for pharmaceutical dosage forms contain, besides the conventional liquid or solid additives for pharmaceutical coatings, a binder comprising a synthetic polymer, prepared by emulsion polymerization, having 5 to 100% by weight of units derived from monomers of the formula wherein R1 is a hydrogen atom or a lower alkyl group, R2 is an alkylene or aralkylene group having at least 3 carbon atoms in the chain between the amino nitrogen and the ester oxygen atom of which at least one is tertiary or quaternary, and R3 and R4 are lower alkyl radicals or together with the amino-nitrogen atom form a heteroaliphatic ring, and, optionally, additional comonomer units.