Abstract: A crosslinked rubber is produced by crosslinking a polymer composition containing 100 parts by weight of a rubber component containing a cyclopentene ring-opening polymer and 20 to 200 parts by weight of carbon black, wherein, when the crosslinked rubber is subjected to an ozone treatment in which the rubber is maintained at 40° C. and an ozone concentration of 50 pphm for 144 hours under a 20% tensile strain, the crosslinked rubber shows a rate of change in tensile strength before and after ozone treatment of within ±70%.

Abstract: A cycloolefin rubber having a weight average molecular weight of 100,000 to 800,000, having a silyl group at the polymer chain end, and containing a fatty acid ester of a polyvalent alcohol. A cycloolefin rubber excellent in processability at the time of blending and kneading and excellent in low heat buildup property can be provided.

Abstract: The present invention pertains to: a polymerizable composition comprising a cycloolefin-based monomer represented by a formula (I), and a polymerization catalyst, wherein R1 is a hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, etc, m is an integer from 0 to 6n+6, and n is an integer from 1 to 3. As a result of the present invention, a polymerizable composition that is useful as a material for producing a cycloolefin-based resin formed article that exhibits excellent adhesion to a metal, a cycloolefin-based polymer obtained from the polymerizable composition, a cycloolefin-based resin formed article, and a laminate that includes a metal foil and a cycloolefin-based resin layer that is situated adjacent to the metal foil are provided.

Abstract: The present invention is a polyether-based polymer composition includes: a polyether-based polymer including an oxirane monomer unit and having one cationic group substantially only at one terminal of a polymer chain, and a nanocarbon material. The polyether-based polymer composition of the present invention can be suitably used, for example, as a bucky gel or as a master batch for preparing a nanocarbon material aqueous dispersion in which a nanocarbon material is favorably dispersed.

Abstract: A cycloolefin rubber having a weight average molecular weight of 100,000 to 800,000, having a silyl group at the polymer chain end, and containing a fatty acid ester of a polyvalent alcohol. A cycloolefin rubber excellent in processability at the time of blending and kneading and excellent in low heat buildup property can be provided.

Abstract: A cyclopentene ring-opening polymer having, at a polymer chain end, a structure where a polymer chain and a group containing an alkoxysilyl group are bonded through —NH— and having a weight average molecular weight of 100,000 to 1,000,000, wherein the structure is a structure represented by the following general formula (1): pCP—Y1-NH—Y2-Si(OR1)a(R2)3-a (1) where, in the general formula (1), pCP represents a cyclopentene ring-opening polymer chain, Y1 represents a bivalent hydrocarbon group having 1 to 20 carbon atoms, each of R1 and R2 represents a hydrocarbon group having 1 to 20 carbon atoms, Y2 represents a bivalent hydrocarbon group having 1 to 20 carbon atoms in which —NH— may be interposed, and “a” is an integer of 1 to 3.

Abstract: A polyether compound containing oxirane monomer units in an average number per molecule of 10 to 100, wherein the polyether compound contains repeating units which are represented by the general formula (2) as at least part of the oxirane monomer units is provided. According to the present invention, it is possible to provide a polymer material which has suitable fluidity and is excellent in ion conductivity. (R1 to R4 respectively independently indicate a hydrogen atom or C1 to C3 alkyl group, and R2 and R3 may be bonded with each other. Further, X? is an anion which is comprised of 2 to 25 atoms.

Abstract: [Problem] To provide a cyclopentene ring-opening copolymer used in a rubber composition for tires having excellent wet grip performance and low heat buildup; and a method for producing the cyclopentene ring-opening copolymer. To further provide a rubber composition obtained by using the cyclopentene ring-opening copolymer. [Solution] This cyclopentene ring-opening copolymer comprises cyclopentene and a cyclic olefin containing an aromatic ring; the content of the aromatic ring with respect to the total weight of the copolymer is 10 to 40 wt %; and the weight average molecular weight (Mw) is 200,000 to 1,000,000. The cyclopentene ring-opening copolymer alternatively comprises cyclopentene and a norbornene compound; the weight ratio of cyclopentene-derived structural units to all repeating structural units in the copolymer is 40 to 90 wt %, and the weight ratio of norbornene compound-derived structural units is 10 to 60 wt %; and the weight average molecular weight (Mw) is 200,000 to 1,000,000.

Abstract: The present invention pertains to: a polymerizable composition comprising a cycloolefin-based monomer represented by a formula (I), and a polymerization catalyst, wherein R1 is a hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, etc, m is an integer from 0 to 6n+6, and n is an integer from 1 to 3. As a result of the present invention, a polymerizable composition that is useful as a material for producing a cycloolefin-based resin formed article that exhibits excellent adhesion to a metal, a cycloolefin-based polymer obtained from the polymerizable composition, a cycloolefin-based resin formed article, and a laminate that includes a metal foil and a cycloolefin-based resin layer that is situated adjacent to the metal foil are provided.

Abstract: There is provided a ring-opening polymer of cyclopentene wherein a cis ratio of the cyclopentene-derived structural units is 30% or more, a weight average molecular weight (Mw) is 100,000 to 1,000,000, and a functional group containing a structure represented by the general formula (1) or (2) is included at an end of the polymer chain. —Y—H??(1) (in the above general formula (1), Y represents an oxygen atom or a sulfur atom.) —NH-Q??(2) (in the above general formula (2), Q represents a hydrogen atom or a hydrocarbon group or a silyl group which may have a substituent group.

Abstract: A cyclopentene ring-opening polymer which has hydroxy groups at the polymer chain terminal ends is produced, then the hydroxy groups of the cyclopentene ring-opening polymer and isocyanate groups of a compound containing alkoxysilyl groups and isocyanate groups in its molecule are made to react to thereby produce a cyclopentene ring-opening polymer which contains structures at the polymer chain terminal ends where the polymer chains and groups including alkoxysilyl groups are bonded through urethane bond groups and which has a weight average molecular weight of 100,000 to 1,000,000.

Abstract: There is provided a ring-opening polymer of cyclopentene wherein a cis ratio of cyclopentene-derived structural units is 30% or more, the weight average molecular weight (Mw) is 100,000 to 1,000,000, and an oxysilyl group is included at an end of the polymer chain. For example, the ring-opening polymer of cyclopentene can be obtained by ring opening polymerization of cyclopentene in the presence of a compound of a transition metal belonging to Group 6 in the Periodic Table, an organoaluminum compound represented by the following general formula (1), and an olefinically unsaturated hydrocarbon containing an oxysilyl group. (R1)3-xAl(OR2)x??(1) (in the general formula (1), R1 and R2 represent a hydrocarbon group having 1 to 20 carbon atoms and x satisfies the requirement 0<x<3.

Abstract: A polyether compound containing oxirane monomer units in an average number per molecule of 10 to 100, wherein the polyether compound contains repeating units which are represented by the general formula (2) as at least part of the oxirane monomer units is provided. According to the present invention, it is possible to provide a polymer material which has suitable fluidity and is excellent in ion conductivity. (R1 to R4 respectively independently indicate a hydrogen atom or C1 to C3 alkyl group, and R2 and R3 may be bonded with each other. Further, X? is an anion which is comprised of 2 to 25 atoms.

Abstract: A polymerizable composition which contains a cycloolefin monomer and a ruthenium carbene complex which is expressed by the following general formula (I): (in which general formula (I), R1 and R2 respectively independently represent a hydrogen atom, halogen atom, or cyclic or chain C1 to C20 hydrocarbon group which may contain a halogen atom, oxygen atom, nitrogen atom, sulfur atom, phosphorus atom, or silicon atom; X1 and X2 respectively independently represent an anionic ligand; L1 and L2 respectively independently represent a neutral electron donor ligand; L2 is a group with a higher three-dimensionally bulk than L1, where L1 and L2 are at cis positions with each other; R1 and R2 may bond with each other to form an aliphatic ring or aromatic ring which may contain a hetero atom; and R1, R2, X1, X2, L1, and L2 may bond with each other in any combination to form a multidentate chelating ligand).

Abstract: A cyclopentene ring-opening polymer which has hydroxy groups at the polymer chain terminal ends is produced, then the hydroxy groups of the cyclopentene ring-opening polymer and isocyanate groups of a compound containing alkoxysilyl groups and isocyanate groups in its molecule are made to react to thereby produce a cyclopentene ring-opening polymer which contains structures at the polymer chain terminal ends where the polymer chains and groups including alkoxysilyl groups are bonded through urethane bond groups and which has a weight average molecular weight of 100,000 to 1,000,000.

Abstract: There is provided a ring-opening polymer of cyclopentene wherein a cis ratio of cyclopentene-derived structural units is 30% or more, the weight average molecular weight (Mw) is 100,000 to 1,000,000, and an oxysilyl group is included at an end of the polymer chain. For example, the ring-opening polymer of cyclopentene can be obtained by ring opening polymerization of cyclopentene in the presence of a compound of a transition metal belonging to Group 6 in the Periodic Table, an organoaluminum compound represented by the following general formula (1), and an olefinically unsaturated hydrocarbon containing an oxysilyl group. (R1)3-xAl(OR2)x??(1) (in the general formula (1), R1 and R2 represent a hydrocarbon group having 1 to 20 carbon atoms and x satisfies the requirement 0<x<3.

Abstract: There is provided a ring-opening polymer of cyclopentene wherein a cis ratio of the cyclopentene-derived structural units is 30% or more, a weight average molecular weight (Mw) is 100,000 to 1,000,000, and a functional group containing a structure represented by the general formula (1) or (2) is included at an end of the polymer chain. —Y—H ??(1) (in the above general formula (1), Y represents an oxygen atom or a sulfur atom.) —NH-Q ??(2) (in the above general formula (2), Q represents a hydrogen atom or a hydrocarbon group or a silyl group which may have a substituent group.

Abstract: A film comprising a norbornene (NB) compound addition polymer that is excellent in chemical resistance, optical properties and the like, has a high Tg, a low water absorption ratio and a low linear expansion coefficient, and is soluble in an ordinary solvent. The film comprising a NB compound addition polymer essentially consisting of repeating units derived from NB compound monomers, wherein the addition polymer has a specific Mw and has a sum of the units (A1) and (A2) of 70% by mol or more based on the total units, wherein the molar number of each unit satisfies the following equations: 70/30?[{(A1)+(A2)}/(B)]?100 and 10/90?(A1)/(A2)?98/2, or the addition polymer has a specific Mw and Mn and essentially consists of the units (A1) and (B), wherein the molar number of each unit satisfies the following equation: 70/30?[(A1)/(B)] ?98/2.

Abstract: An isoprene-based polymer cyclized product obtained by cyclization of an isoprene-based polymer containing structural units expressed by the general formula (1) and having a ratio of content of the structural units to all repeating structural units of 60 mol % or more; an alicyclic polymer obtained by hydrogenation of 50% or more of the carbon-carbon double bonds of the isoprene-based polymer; and an optical resin comprising the isoprene-based polymer cyclized product and alicyclic polymer. (in the general formula (1), R1 indicates a C1 to C10 alkyl group).

Abstract: A process for producing a cycloolefin addition polymer comprising addition-polymerizing a cycloolefin in the presence of a catalyst comprising a combination of a specific transition metal compound of Group 4 of the Periodic Table, with an organoaluminum oxy compound, and/or a compound capable of reacting with the Group 4 transition metal compound to form an ion pair. The specific group 4 transition metal compound preferably has a structure such that the group 4 transition metal is bonded to a cyclopentadienyl ring in an ?1 mode. The above-mentioned catalyst exhibits high activity for both of addition homopolymerization of a cycloolefin and addition copolymerization of a cycloolefin with an ?-olefin.