Hydrogenated ring-opening metathesis copolymer and process for producing the same

A hydrogenated ring-opening metathesis polymer which contains, if necessary, a structural unit [A] of the following general formula [1]:

• 29
• [wherein, at least one of R1 to R4 represents a functional group having a tertiary ester group of a cyclic alkyl of the following general formula [2]:
• 30
• (wherein, the chain line represents a connecting means. R5 represents a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, a linear, branched or cyclic alkoxyalkyl group having 2 to 10 carbon atoms, or a linear, branched or cyclic acyl group having 1 to 10 carbon atoms. R6 represents a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms. W1 represents a single bond or a (k+2)-valent hydrocarbon group having 1 to 10 carbon atoms. Z represents a divalent hydrocarbon group having 2 to 15 carbon atoms, and forms a single ring or a cross-linked ring together with carbon atoms to be bonded. k represents 0 or 1.) and the remaining groups of R1 to R4 are selected each independently from a hydrogen atom, linear, branched or cyclic alkyl groups having 1 to 20 carbon atoms, halogens, linear, branched or cyclic halogenated alkyl groups having 1 to 20 carbon atoms, linear, branched or cyclic alkoxy groups having 1 to 20 carbon atoms, linear, branched or cyclic alkoxyalkyl groups having 2 to 20 carbon atoms, linear, branched or cyclic alkylcarbonyloxy groups having 2 to 20 carbon atoms, arylcarbonyloxy groups having 6 to 20 carbon atoms, linear, branched or cyclic alkylsulfonyloxy groups having 1 to 20 carbon atoms, branched or cyclic alkylsulfonyloxy groups, arylsulfonyloxy groups having 6 to 20 carbon atoms, linear, branched or cyclic alkoxycarbonyl groups having 2 to 20 carbon atoms, or linear, branched or cyclic alkoxycarbonylalkyl groups having 3 to 20 carbon atoms, and X1s may be the same or different and represent —O— or —CR72— (wherein, R7 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms.). j represents an integer of 0 or 1 to 3.], and contains at least a structural unit [B] of the following general formula [3]:
• 31
• [wherein, R8 to R11 each independently represent a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, and X2s may be the same or different and represent —O— or —CR122— (wherein, R12 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms.). m represents an integer of 0 or 1 to 3.], and/or a structural unit [C] of the following general formula [4]:
• 32
• [wherein, R13 to R16 each independently represent a hydrogen atom or a linear, branched or cyclic alkyl group having 1 to 10 carbon atoms, and X3s may be the same or different and represent —O— or —CR172— (wherein, R17 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms.). One of Y1 and Y2 represents —(C═O)— and the other of Y1 and Y2 represents —CR182— (wherein, R18 represents a hydrogen atom or a linear or branched alkyl group having 1 to 10 carbon atoms.). n represents an integer of 0 or 1 to 3.],
• wherein at least one of X1 in the structural unit [A] of the general formula [1], X2 in the structural unit [B] of the general formula [3] and X3 in the structural unit [C] of the general formula [4] represents —O—, and
• the molar ratio of [A]/([B] and [C]) is 0/100 to 99/1, and the ratio of the weight-average molecular weight Mw to the number-average molecular weight Mn (Mw/Mn) is 1.0 to 2.0.