Hong Li,Quanxing Zhang,Wei Huang,Wei Jiang,Xupeng Zong,Bingcai Pan
申请号：
US14129323
公开号：
US09062006B2
申请日:
2011.11.02
申请国别(地区):
US
年份:
2015
代理人:
摘要：
Disclosed is a high molecular weight polylactic acid synthesized by using a method for synthesizing and catalytically-polycondensing bionic creatinine-guanidinium chloride. Creatinine is used as the material in a reaction with aqueous hydrochloric acid to synthesize a bionic creatinine-guanidinium salt catalyst, creatinine-guanidinium chloride (CR.Cl). The creatinine-guanidinium chloride synthesized is used as a catalyst, an industrial grade lactic acid (LA, 85% to 90%, aqueous solution) is used as a monomer, a solvent-free two-step polycondensation method is used to synthesize and afford metal-free and toxic residue-free polylactic acid featuring high biological safety and high molecular weight.
