Preparation process of dicarboxylic acid compounds
申请人:Adchemco Corporation
公开号:EP1215192A3
公开(公告)日:2003-02-12
Carboxylic acid compounds, each of which has an indene skeleton and represented by the following formula (2) or a fluorene skeleton and represented by the following formula (3), are each prepared by reacting an unsaturated carboxylic acid compound represented by the following formula (1) with indene or fluorene in the presence of a strong base catalyst: wherein R1, R2, R3 and R4 each independently represents an atom or group selected from a hydrogen atom, an alkyl group, an aryl group or a carboxyl group, with the proviso that at least one of R3 and R4 contains a carboxyl group or a salt thereof or a carboxylic ester group.
The present invention provides a method for producing a thermoplastic resin by reacting reactants comprising a dihydroxy compound. In this production method, the dihydroxy compound comprises a dihydroxy compound represented by the following formula (1), and at least one of a compound represented by the following formula (A), a compound represented by the following formula (B), and a compound represented by the following formula (C), wherein the total weight of the compound represented by the formula (A), the compound represented by the formula (B), and the compound represented by the formula (C) is 1,500 ppm or more, based on the weight (100 parts by weight) of the dihydroxy compound represented by the formula (1).
An object is to provide an optical lens having low water-absorbing capacity and superior in heat resistance, transparency, and optical characteristics (refractive index, Abbe's number, and photoelastic coefficient). The optical lens includes a polyester resin containing a unit (A) of the following formula (1).
OPTICAL POLYESTER FILM AND TRANSPARENT ELECTROCONDUCTIVE FILM
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:EP3521869A1
公开(公告)日:2019-08-07
An object is to provide an optical polyester film and a transparent conductive film that are superior in transparency, heat resistance, optical properties, and adhesion. The optical polyester film includes: a base material containing a polyester resin containing a unit (A) of the following formula (1); and at least one functional layer disposed on at least one surface of the base material, wherein the at least one functional layer is selected from the group consisting of a hard coat layer, a transparent conductive layer, an anti-reflection layer, a gas barrier layer, and an adhesive layer.