A process for the production of a prepolymer containing two terminal epoxide groups and two-non-terminal, secondary hydroxy groups characterised in that it comprises reacting, in a single step, a polyol, an acid anhydride and a diepoxide is disclosed.
A composition for the production of a thermoset composition containing oxazolidone and urethane linkages characterised in that it comprises a polyisocyanate and a prepolymer composition comprising a prepolymer containing two terminal epoxy groups and two non-terminal, secondary hydroxy groups is also disclosed.
A thermoset composition characterised in that it comprises oxazolidone and urethane linkages in the recurring unit which is essentially free of isocyanurate linkages, the said oxazolidone linkages being present in the polymer backbone and being separated from one another by ester linkages and the said urethane linkages being present in side chains attached to the polymer backbone is further disclosed.
The present invention provides advantages over the prior art.
本发明公开了一种生产含有两个末端
环氧化物基团和两个非末端仲羟基基团的预聚物的工艺,其特征在于该工艺包括在一个步骤中使多元醇、酸酐和二
环氧化物发生反应。
本发明还公开了一种用于生产含有
噁唑烷酮和聚
氨酯链节的热固性组合物的组合物,其特征在于该组合物包括一种多
异氰酸酯和一种预聚物组合物,该预聚物包括含有两个末端环氧基团和两个非末端仲羟基基团的预聚物。
本发明还公开了一种热固性组合物,其特征在于该组合物在基本上不含异
氰脲酸酯链节的递归单元中包含
噁唑烷酮和
氨基甲酸乙酯链节,所述
噁唑烷酮链节存在于聚合物主链中,并通过酯链节彼此分开,所述
氨基甲酸乙酯链节存在于连接到聚合物主链的侧链中。
与现有技术相比,本发明具有优势。