Abstract: Disclosed are a method for preparing hydroxypropyl methylcellulose acetate succinate (HPMCAS) grains and HPMCAS grains. The disclosed method for preparing HPMCAS grains comprises: a step of esterifying hydroxypropyl methylcellulose (HPMC), acetic anhydride, and succinic anhydride in a reaction medium in the presence of a catalyst so as to obtain a reaction solution containing HPMCAS (esterification step); and a step of continuously or intermittently putting the reaction solution into water so as to form grains (granulating step).

Abstract: The present invention relates to an aqueous composition for a hard capsule, the composition having an improved degree of gelation, and to a hard capsule produced using the aqueous composition. The present invention enables the production of an aqueous composition for a hard capsule, the composition having an excellent degree of gelation due to comprising a gelation agent and a gelation auxiliary agent along with water-soluble cellulose ether, alcohol and water, and as a result a high quality hard capsule having improved hard capsule moldability can be produced. Furthermore, the alcohol improves the solubility of the water-soluble cellulose ether, and thus a stable gel power can be maintained by only a small amount of gelation agent, thereby resolving the problem of the gelation agent causing a drop in solubility time.

Abstract: The present invention relates to an aqueous composition for a hard capsule, a method for producing same, and a hard capsule produced using the aqueous composition. More specifically, the present invention relates to an aqueous composition for a hard capsule which comprises a small amount of alcohol and thus has guaranteed stability and excellent capsule moldability, and to a hard capsule produced using the aqueous composition.

Abstract: The present invention relates to an aqueous composition for a hard capsule, a method for producing same, and a hard capsule produced using the aqueous composition. More specifically, the present invention relates to an aqueous composition for a hard capsule, the amount of a gelation agent and a gelation auxiliary agent included in the composition having been reduced to appropriate amounts thereby improving the dissolution rate of a hard capsule, and to a hard capsule produced using the aqueous composition.

Abstract: Disclosed are a method for preparing hydroxypropyl methylcellulose acetate succinate (HPMCAS) grains and HPMCAS grains. The disclosed method for preparing HPMCAS grains comprises: a step of esterifying hydroxypropyl methylcellulose (HPMC), acetic anhydride, and succinic anhydride in a reaction medium in the presence of a catalyst so as to obtain a reaction solution containing HPMCAS (esterification step); and a step of continuously or intermittently putting the reaction solution into water so as to form grains (granulating step).

Abstract: An encryption apparatus includes a setting generator configured to generate a public key and a secret key necessary for encryption; and an encryptor configured to generate a homomorphic ciphertext which allows multiplication operation by using the generated public key and a plaintext.