| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 12.00 |
| PATENT ASSIGNEE | Asahi Glass |
| PATENT CLAIMS |
Graded-refractive-index optical plastic material comprising an amorphous F-contg polymer (A) having no C-H bond, & at least one F-contg polycyclic compd (B) having "n" higher by > 0.005 than (A), wherein (B) is distributed in (A) with a concn gradient such that the concn decreases in a direction of from the center to the periphery, & the at least one F-contg polycyclic compd is - A F-contg non-condensed polycyclic compd having > 2 F-contg rings bonded by a bond contg member selected from: triazine ring, O atom, S atom, P atom & metal atom each of said F-contg rings being a C ring or Het ring & having F atom or perfluoroalkyl group, said polycyclic compd having no C-H bond |
| PATENT PHOTOCOPY | Available on request |
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