The modified gelatin binder is a natural organic macromolecular material modified by esterification and graft copolymeri zation of the protein derivative obtained from partially hydrolyzing the collage n.

• 改性动物胶砂芯粘结剂系一种胶原简单水解的蛋白质衍生物，并经酯化和接枝共聚等改性合成无毒、污染的天然有机高分子化合物。