专利名称：Method of making polyester prepolymers发明人：Chen-i Lu申请号：US06/407401申请日：19820812公开号：US04379912A公开日：19830412
摘要：A polyester prepolymer having increased reactivity when subjected tomolecular weight buildup, such as in solid phase polymerization is prepared by animproved method which includes the steps of: reacting a dicarboxylic acid and a glycol inthe presence of a transesterification catalyst to form a reaction mixture containingcondensation oligomers; purifying the reaction mixture to remove substantially all of thereaction by-products and residual dicarboxylic acid, glycol and catalyst and to crystallizethe condensation oligomers; and polycondensing the oligomers to form a moltenprepolymer.
申请人：EASTMAN KODAK COMPANY
代理人：David F. Janci
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容