Zeon Corporation

Takashi Houkawa

Takuya Komatsubara

Kenji Umeda

Kensaku Fujii

Yasuhiro Shimizu

Yosuke Harauchi

Ayumi Sato

Hiroaki Matsuda

Takeshi Hirata

Hiroya Nishioka

Akira Furuko

Yosuke Naka

Provided is a phenol compound represented by general formula (I), shown below. In general formula (I), Rand Reach indicate, independently of each other, a hydrogen atom or an alkyl group.

Phenol compound, resin composition and method of producing same, and shaped product

The present invention provides: a copolymer (A) which is a copolymer obtained by copolymerizing one or plural cycloolefin monomers and one or plural acyclic olefin monomers, or a copolymer obtained by copolymerizing two or more cycloolefin monomers, wherein the glass transition temperature (Tg) of the copolymer is 100&#xb0; C. or higher, the refractive index of the copolymer is 1.545 or higher, and the Abbe's number of the copolymer is 50 or larger, and at least one of the cycloolefin monomers is a deltacyclene.

Copolymer, polymer, molding material and resin molded body

The present invention provides: a copolymer (A) which is a copolymer obtained by copolymerizing one or plural cycloolefin monomers and one or plural acyclic olefin monomers, or by copolymerizing two or more cycloolefin monomers, wherein a glass transition temperature (Tg) is 100&#xb0; C. or higher, a refractive index is 1.545 or higher, and an Abbe's number is 50 or larger; a polymer (B) selected from: a ring-opening homopolymer obtained by ring-opening polymerization of only a monomer represented by formula (I), a ring-opening copolymer obtained by ring-opening copolymerization of the monomer represented by formula (I) and a monomer capable of ring-opening copolymerization with the monomer represented by formula (I), a hydrogenated product of the ring-opening homopolymer and a hydrogenated product of the ring-opening copolymer; a forming material containing the copolymer (A) or the polymer (B); and a resin formed article obtained by forming the forming material. 

The present invention is a hydrogenated cycloolefin ring-opening polymer comprising a repeating unit derived from tetracyclododecene, and a repeating unit derived from an additional norbornene-based monomer,

Cyclic olefin ring-opened polymer hydride, resin molded article, and optical member

An optical polymer satisfying an expression: (&#x3b7;A&#x2212;&#x3b7;B)/&#x3b7;B&#xd7;100&#x3c;60, where, &#x3b7;A is the melt viscosity of the optical polymer measured at a temperature of 290&#xb0; C. and a shear rate of 200 (l/s), and &#x3b7;B is the melt viscosity of the optical polymer measured at a temperature of 290&#xb0; C. and a shear rate of 2000 (l/s).

Optical polymer and optical element obtained by forming thereof

A hydrogenated crystalline norbornene ring-opening polymer is obtained by hydrogenating 80% or more of carbon-carbon double bonds of a ring-opening polymer that is obtained by ring-opening polymerization of norbornene monomers including 90 to 100 wt % of 2-norbornene and 0 to 10 wt % of a 2-norbornene derivative having a substituent which does not include an aliphatic carbon-carbon double bond in the presence of a branching agent, the hydrogenated crystalline norbornene ring-opening polymer having a melting point of 110 to 145&#xb0; C. and a branching index of 0.3 to 0.98, and a molded article is obtained by molding the hydrogenated crystalline norbornene ring-opening polymer. The hydrogenated crystalline norbornene ring-opening polymer has excellent industrial productivity, and the molded article has excellent productivity and moisture resistance.

Growing community of inventors

Tokyo, Japan

Takashi Houkawa