Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.

Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.

Abstract: A cyclic olefin copolymer for a medical instrument has an aromatic ring and contains at least one structural unit (A) of the specific formulas (Ia), (II), and (III).

Abstract: The optical lens of the present invention contains a molded product constituted with a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin, and a constitutional unit (C) derived from an aromatic vinyl compound represented by a specific chemical formula.

Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.

Abstract: An optical resin comprises a copolymer of 4-methyl-1-pentene and at least one monomer selected from the group consisting of 3-methyl-1-pentene, 3-methyl-1-butene and 4,4-dimethyl-1-pentene. The content of a constituent unit (a) derived from 4-methyl-1-pentene is equal to or more than 60 mol % and equal to or less than 99 mol %, and the total content of a constituent unit (b) derived from at least one monomer selected from the group consisting of 3-methyl-1-pentene, 3-methyl-1-butene and 4,4-dimethyl-1-pentene is equal to or more than 1 mol % and equal to or less than 40 mol %.

Abstract: Disclosed is a method for producing a syndiotactic propylene polymer having a syndiotactic pentad fraction (rrrr fraction) of not less than 85%, a melting point (Tm) within the range of 145-170° C. and a limiting viscosity [?] within the range of 0.1-10 dl/g by a solution polymerization method using a group 4 crosslinked metallocene compound, which is not accompanied by precipitation of a polymer (excluding white turbidity). Also disclosed is a production method which enables to continuously perform such a production.

Abstract: An object of the present invention is to provide a resin composition which is increased in heat resistance (high crystallinity) and transparency without impairing rigidity which a thermoplastic resin inherently has and a molded article containing the resin composition. A thermoplastic resin composition relating to the present invention includes a thermoplastic resin (A) and a crystal nucleating agent (B) composed of tris(amino acid ester)amides of trimesic acid. The crystal nucleating agent (B) is preferably tris(valine ester)amides of trimesic acid or tris(leucine ester)amides of trimesic acid, and the thermoplastic resin (A) is preferably a lactic acid resin and more preferably a polylactic acid.

Abstract: It is an object of the present invention to provide a process for producing a syndiotactic propylene polymer with high polymerization activity and high efficiency by a solution polymerization method without deposition of polymers (excluding a white state), and a production process capable of conducting the above production continuously, provided that these processes could not be attained conventionally. The present invention is: a process for producing a syndiotactic propylene polymer having a syndiotactic pentad fraction (rrrr fraction), as measured by 13C-NMR, of at least 85%, a melting point (Tm), as measured by DSC, of from 145° C. to 170° C., and an intrinsic viscosity [?] of 0.1 to 10 dl/g, which process comprises a step (P1) of solution polymerizing propylene singly or propylene and at least one monomer selected from ethylene and an ?-olefin having 4 to 10 carbon atoms at a polymerization temperature (TR) of from 30° C. to 250° C.

Abstract: An object of the present invention is to provide a resin composition which is increased in heat resistance (high crystallinity) and transparency without impairing rigidity which a thermoplastic resin inherently has and a molded article containing the resin composition. A thermoplastic resin composition relating to the present invention includes a thermoplastic resin (A) and a crystal nucleating agent (B) composed of tris(amino acid ester)amides of trimesic acid. The crystal nucleating agent (B) is preferably tris(valine ester)amides of trimesic acid or tris(leucine ester)amides of trimesic acid, and the thermoplastic resin (A) is preferably a lactic acid resin and more preferably a polylactic acid.