Patent ID: 9700517
Date: 2017-07-11
CPC Classifications: A61K,A61P,B29C,B29D,B29K,B29L

Claim:
1. An acid resistant hard pharmaceutical capsule shell comprising gellan gum and at least one water-soluble film forming polymer, wherein: the weight ratio of gellan gum to said at least one water soluble film forming polymer is between 4/100 to 15/100 parts by weight of gellan gum per 100 parts by weight of the at least one water soluble film forming polymer, wherein the at least one water soluble film forming polymer is selected from the group consisting of hydroxypropyl methyl cellulose; gelatin, pullulan, hydroxypropyl starch, and a mixture thereof, the capsule shell does not comprise additional gelling aids comprising cations, wherein cations are not present in an amount higher than the amount naturally present in the gellan gum, the capsule shell has a moisture content ranging from about 2% to about 16% over the total weight of the shell, and the capsule shell exhibits resistance to leakage of at least 1 hour at pH 1.2 in a USP-30 simulated gastric fluid.