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US 5,292,522 AGranted
Aqueous film coating agent for solid medicaments
AssigneeRohm Co., Ltd.
InventorsHans-Ulrich Petereit, Manfred Assmus, Klaus Lehmann
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Abstract
A water insoluble lipophilic emulsifier having a hydrophile-lipophile balance (HLB) of 3.5 to 7, added to an aqueous dispersion containing a polymer comprising acrylic acid, methacrylic acid, their alkyl esters, and/or their alkylaminoalkyl esters, acts as a lubricant and parting agent when the resulting mixture is used for coating pharmaceutical dosage forms and prevents the pharmaceutical dosage forms being coated from sticking to one another and to the walls of the coating apparatus used.
Claims9
A stable film forming aqueous coating composition for solid pharmaceutical dosage forms, comprising
- (a) an aqueous dispersion, prepared directly by aqueous emulsion polymerization, of a film forming polymer comprising at least one member selected from the group consisting of acrylic acid, methacrylic acid, alkyl esters of these acids, and aminoalkyl esters of these acids, and, added to said dispersion,
- (b) a water insoluble organic lipophilic emulsifier having a hydrophile-lipophile balance (HLB) value from 3.5 to 5, in an amount which is from 0.1 to 8 percent by weight of said polymer.
Dependencies are inferred from the claim text.