Norbornene open-ring polymers

• Main Authors: MIYAMOTO, YOSHIKAZU, YOSHIDA, SOUICHI, HASHIGUCHI, YUICHI, MIYAKI, NOBUYUKI
• Format: Patent
• Language: Chinese; English
• Published: 16.10.2004
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The purpose of the present invention is to provide norbornene open-ring polymers which exhibit relatively small birefringence, peculiar dependence of birefringence on wavelength, and excellent transparency and heat resistance. The polymers comprise structural units represented by the general formula (I). (In general formula (I), m and n are each an integer of 0 to 2; X1 is ethylene or vinylene; R1 and R2 are each hydrogen or a substituted or unsubstituted hydrocarbon group having 1 to 30 carbon atoms; and R3 is a group represented by the general formula (I-1) or (I-2) (in which R11 to R27 are each hydrogen, halogeno, an optionally substituted C1-30 hydrocarbon group which may have a connecting group optionally containing oxygen, sulfur, nitrogen, or silicon, or a polar group; p and q are each 0 or a positive integer with the proviso that when both p and q are 0, R12 and R15 or R19 and R15 may be united to form a carbo- or hetero-cycle which may have any of mono- and poly-cyclic structures; and s is 0 or a pos