Patent ID: 6992154
Filing Date: 2006-01-31
Classification: C08F,C08J,C08L,C09K

Abstract:
1. An optically transparent material comprising a cyclic olefin addition copolymer comprising a repeating unit (a) shown by the following formula (1) and a repeating unit (b) shown by the following formula (4), and having a number average molecular weight of 10,000 to 1,000,000: wherein A 1 to A 4 individually represent a hydrogen atom, a halogen atom, an alkyl group, alkenyl group, cycloalkyl group, or aryl group having 1–20 carbon atoms, or a reactive silyl group shown by the following formula (2) or (3), provided that at least one of A 1 to A 4 represents the reactive silyl group, X represents —CH 2 — or —O—, and m is either 0 or 1; wherein R 1 , R 2 , and R 3 individually represent a hydrogen atom or a hydrocarbon group having 1–20 carbon atoms, n is an integer from 0 to 5, and Y represents a hydrocarbon residue of an aliphatic diol, an alicyclic diol, or an aromatic diol having 2–20 carbon atoms; wherein R 1 and R 2 individually represent a hydrogen atom or a hydrocarbon group having 1–20 carbon atoms, n is an integer from 0 to 5, and Z represents a hydrocarbon residue of an aliphatic triol, an alicyclic triol, or an aromatic triol having 4–20 carbon atoms; wherein B