A kind of chromium gel system of retarded crosslinking made of partially hydrolyzed polyacrylamide(HPAM), sodium bichromate and organic reductant sulfocarbamide was investigated.

• 缓交联铬冻胶体系由部分水解聚丙烯酰胺、重铬酸钠与有机还原剂硫脲组成。