Study of some improved shellac derivatives as microencapsulating materials.
Shellac was chemically modified to alter its permeability and to prevent its 'after hardening'. Various shellac derivatives such as with succinic anhydride, phthalic anhydride, ethylenediamine and myristic acid were prepared. Salicylic acid granules were coated and evaluated for flow properties, moisture absorption and release characteristics before and after ageing. These derivatives imparted better flow properties and showed excellent ageing properties.
Department of Pharmaceutical Sciences, Nagpur University, India.
D S
DS
Sheorey
M D
MD
Kshirsagar
A K
AK
Dorle
D004339:Drug Compounding; D010539:Permeability; D012116:Resins, Plant / Q000008:administration & dosage* / Q000737:chemistry; D012995:Solubility
D012116:Resins, Plant; C003934:shellac