Provided is a radiation-curable, inner primary coating composition adapted for forming inner primary coatings on optical glass fibers. The coating composition is formulated from a composition having:
at least one radiation-curable oligomer having a number average molecular weight of at least 2000 containing:
a polyester backbone;
a plurality of carbon-containing side-chains each having from about 3 to about 30 carbon atoms and being connected to the polyester backbone, wherein the carbon-containing side-chains comprise at least about 5% of the number average molecular weight of the oligomer; and
at least one radiation-curable functional group bound to the polyester backbone, wherein the oligomer is present in an amount sufficient to provide an inner primary coating formed from the coating composition with the functional capability of releasing from a surface of an optical glass fiber as a coherent layer; and
optionally at least one diluent monomer in an amount to provide the coating composition with a viscosity suitable for application to optical glass fibers.
本文提供了一种辐射固化的内层初级涂层组合物,适用于在光学
玻璃纤维上形成内层初级涂层。该涂层组合物由以下成分配制而成:
至少一种辐射固化低聚物,其平均分子量至少为 2000,含有
聚酯骨架
多个含碳侧链,每个侧链具有约 3 至约 30 个碳原子,并与聚酯主链相连,其中含碳侧链至少占低聚物平均分子量的约 5%;以及
至少一个与聚酯主链结合的辐射固化官能团,其中低聚物的存在量足以使由涂层组合物形成的内层主涂层具有从光学
玻璃光纤表面作为相干层释放的功能;以及
可选的至少一种稀释剂单体,其用量足以使涂层组合物具有适用于光学
玻璃纤维的粘度。