| 摘要 |
<p>A lowly birefringent copolymer substantially composed of repeating units of general formula (1) and (meth)acrylate ester repeating units, wherein R1 is hydrogen or a C¿1?-C25 hydrocarbon group, an alicyclic hydrocarbon group or a substituted hydrocarbon group. This copolymer exhibits low birefringence and low water absorbence and is excellent in transparency, heat resistance and mechanical strengths, thus being useful as lenses, optical disks, optical fibers, and so on.</p> |
