Darby & Darby
Ring-opened polymer
 The present invention provides a ring-opened polymer, which is prepared by reacting at least one pericyclic olefin elected from those represented by formulae (I) and (II) through ring-opening metathesis polymerization ##STR1## wherein PA1 A and B may be the same or different and are independently selected from the group consisting of halogen, hydrogen, C.sub.3-20 cyclic or pericyclic alkyl, C.sub.1-20 linear and branched alkyl, C.sub.6-20 aryl, C.sub.7-20 arylalkyl, C.sub.7-20 alkylaryl, silyl, alkylsilyl, germyl, alkylgermyl, alkoxycarbonyl, acyl, and a heterocylic group; or, A and B are linked together to form a C.sub.3-20 saturated or unsaturated cyclic hydrocarbon group or a substituted or unsubstituted heterocyclic group; PA1 C is selected from the group consisting of oxygen, sulfur, ##STR2## PA1 --CH.sub.2 --, and --SiH.sub.2 --, PA1 wherein each R.sup.1 is independently selected from C.sub.1-20 alkyl and phenyl; PA1 each R is independently selected from hydrogen, halogen, and C.sub.1-20 alkyl; and PA1 each n is an integer from 1 to 6. 
Everlight Chemical Industrial Corporation Industrial Technology Research Institute
C Y
C08G Y10S
inventional additional
Bang-Chein Jian-Hong Tai-Sheng Sheng-Yueh Jui-Fa
Ho Chen Yeh Chang Chang