Application and preparation of hypromellose phthalate_Kain Industrial Additive

Background and overview[1] As an enteric polymer, hypromellose phthalate is widely known. It is a polymer with a total of three substituents, and is made by using methyl (-CH3) and hydroxypropyl groups. It is produced by replacing the hydrogen atoms of the hydroxyl groups on the cellulose skeleton with two substituents (-C3H6OH) to obtain an…