论文部分内容阅读
市售虫胶种类繁多,以往仅认为药用虫胶应为无砷、漂白、透明。在实际应用中常发现肠溶性能不稳定,包衣工艺过程不易控制,致使不同厂的产品或不同批号的肠溶性能各有差异。Wagner报道氨制虫胶片久置崩解时间延长。桧桓认为虫胶肠溶片的片心影响它的崩解时间,而虫胶衣本身是稳定的。Hick则认为虫胶久置后产生聚合,表现为冷醇不溶物增加,碘价降低,诸说不一。本文对虫胶的理化性质与肠溶性能关系及附加剂对改善虫胶肠溶性能进行了探讨。
A wide range of commercially available shellac in the past that only medicine shellac should be non-arsenic, bleach, transparent. In practice, often found that the instability of enteric coating, coating process is not easy to control, resulting in different plant products or different batches of enteric properties vary. Wagner reports that ammoniacal worms have long been disintegrating for a long time. Hinokihwan think shellac enteric coated tablets affect its disintegration time, and shellac itself is stable. Hick believes that a long time after the shellac polymerization, the performance of cold alcohol insoluble increased, lower iodine prices, all different. In this paper, the physical and chemical properties of shellac and enteric properties and additives to improve the shellac enteric properties were discussed.