Teijin Limited

Kyosuke Yamada

Keisuke Sato

Manabu Matsui

Kazuyoshi Ogasawara

Kazunori Nunome

Takatsune Yanagida

Tatsuya Oyama

Yasuhiko Tomonari

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

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 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.)

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Osaka, Japan

Kyosuke Yamada