Teijin Limited

Manabu Matsui

Keisuke Sato

Kazuyoshi Ogasawara

Kazunori Nunome

Tatsuya Oyama

Kyosuke Yamada

Takatsune Yanagida

Yasuhiko Tomonari

Kazushi Tando

Teruyuki Shigematsu

Atsushi Umeki

An object of the present invention is to provide a novel production method of a poly(ester)carbonate. The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.

Poly(ester)carbonate and method for producing poly(ester)carbonate

It is an object of this invention to provide an optical member that is able to cut ultraviolet rays without employing means such as addition of an ultraviolet absorber to the resin, using an ultraviolet cut filter or using ultraviolet absorption coating, as well as a thermoplastic resin to be used for the optical member. The thermoplastic resin of the invention comprises a spatial structural component unit, wherein the spatial structural component unit includes four or more aromatic groups selected from the group consisting of monocyclic aromatic groups and fused polycyclic aromatic groups, the spatial structural component unit has three or more monocyclic aromatic groups and/or heterocyclic aromatic groups in a conjugated structure, or one or more monocyclic aromatic groups and one or more fused polycyclic aromatic groups in a conjugated structure, or two or more fused polycyclic aromatic groups in a conjugated structure, and in a 0.1 mass % dichloromethane solution, the light transmittance at a wavelength of 355 nm is lower than 20% and the light transmittance at a wavelength of 500 nm is 90% or higher.

Thermoplastic resin and optical member

The invention provides an optical lens that can provide small-sized imaging modules. The optical lens of the invention comprises a thermoplastic resin having a refractive index (nD) and Abbe number (ν) satisfying the following mathematical formula (A):≤−0.02×ν+2.040  (A)(where 1.660<nD).

Optical lens

The purpose of the present invention is to provide a high temperature/humidity resistant polycarbonate resin without using bisphenol A as a raw material. The present invention relates to a polycarbonate resin comprising the repeating units of formulas (1), (2) and (3), wherein the content of the repeating unit of formula (3) is 5 mol% to 50 mol%, and the refractive index is 1.570 to 1.600. {In formula (1), Rand Reach represent a hydrogen atom or a Chydrocarbon group.} {In formula (3), n ranges from 0 to 8, and the R symbols are each selected from Calkyl groups}. 

Polycarbonate resin and optical member containing same

The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15. (In formula (1), each of rings Zand Zrepresents a polycyclic aromatic hydrocarbon group having 9-20 carbon atoms; each of R, R, Rand Rindependently represents a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R-Rand R-Rrepresents a hydrogen atom or an aliphatic or aromatic substituents; each of j, k, r and s independently represent an integer of 0 or more; and each of m, n, p and q independently represents 1 or 2) (In formula (2), each of R, R, Rand Rindependently represent a hydrocarbon group which may contain an aromatic group having 1-12 carbon atoms; each of R-Rand R-Rrepresents a hydrogen atoms or an aliphatic or aromatic substituents; and each of r, s, t and u independently represents an integer of 0 or more.)

Polyester resin or polyester carbonate resin, and optical member using said resin

The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.

Polyester carbonate and method for producing polyester carbonate

The purpose of the present invention is to provide a thermoplastic resin that has a high refractive index and enables low birefringence and balanced heat resistance and moldability. This thermosetting resin includes repeating units represented by formula (1). (In the formula, the rings Z are the same or different and represent an aromatic hydrocarbon ring, Rand Rindependently represent a C1-C12 hydrocarbon group optionally including a hydrogen atom, a halogen atom, and an aromatic group, Arand Arrepresent a C6-C10 aromatic group optionally having a substituent, Land Lindependently represent a divalent linking group, j and k independently represent an integer of 0 or more, m and n independently represent 0 or 1, and W is at least one selected from the groups represented by formulae (2) and (3).) (In the formula, X represents a divalent linking group.)

A thermoplastic resin containing a fluorene derivative. The thermoplastic resin contains 30 mole % or more of a recurring unit derived from 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene and has a content of phenyl vinyl ether represented by the following formula (1) of 100 ppm or less 

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Osaka, Japan

Manabu Matsui