申请人:Moad Graeme
公开号:US20100137548A1
公开(公告)日:2010-06-03
The present invention is directed to a process for the cleavage of one or more starting polymers having thiocarbonylthio groups of the formula (I) into derived polymers in which the —S—(C═S)— group is transformed. The process includes contacting the starting polymer containing groups Y
b
with one or more reagents containing groups X
a
to produce the derived polymer and a byproduct containing the groups Y
b
, wherein the groups X
a
is one or more reactive groups and the groups Y
b
is an extracting group and a byproduct, which is then separated from the derived polymer by conventional separation processes. The derived polymer is free from odor or color that is sometimes associated with the starting polymer and it can be used in making optical lenses, such as high refractive index spectacle lenses.
本发明涉及一种将具有硫代氨基甲酸酯基团的一个或多个起始聚合物通过裂解转化为衍生聚合物的方法,其中的—S—(C═S)—基团得到转化。该方法包括将含有Yb基团的起始聚合物与含有Xa基团的一种或多种试剂接触,以生成衍生聚合物和一种含有Yb基团的副产物,其中Xa基团是一种或多种反应性基团,而Yb基团是一种提取基团和副产物,然后通过常规分离工艺将衍生聚合物与副产物分离。衍生聚合物没有起始聚合物所具有的气味或颜色,并可用于制造光学透镜,如高折射率眼镜镜片。