Abstract: 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 (?) satisfying the following mathematical formula (A): nD??0.02×?+2.040??(A) (where 1.660<nD).

Abstract: A thermoplastic resin composition comprising a thermoplastic resin (A) containing a unit represented by formula (1) and a thermoplastic resin (B) containing a unit represented by formula (2), wherein in the formula (1), L1 and L2 each independently represent a divalent linking group, k and 1 each independently represent an integer of 0 or more, R1, R2, R3, and R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and W represents a divalent linking group; and in the formula (2), L3 and L4 each independently represent a divalent linking group, m and n each independently represent an integer of 0 or more, and R5, R6, R7, and R8 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms.

Abstract: The purpose of the present invention is to provide a thermoplastic resin far an optical lens. In order to enable an optical lens designer to use a variety of lenses, the thermoplastic resin should have a low refractive index, a low Abbe number and a water absorption rate similar to that of a polycarbonate resin. The present invention relates to a thermoplastic resin which contains repeating units represented by formula (1), formula (2) and formula (3) and which has a refractive index of 1.510-1.570. In formula (I), R1, R2, R3 and R4 are each independently a hydrogen atom or a hydrocarbon group having 1-10 carbon atoms. In formula (3), n is 1-8, R moieties are each independently selected from among a hydrogen atom or an alkyl group having 1-3 carbon atoms, and R5 and R6 are each independently a hydrogen atom or a hydrocarbon group having 1-10 carbon atoms.

Abstract: [Problem] An object of the present invention is to provide a thermoplastic resin having high refractive index and low Abbe number and an optical member containing the same. [Solution] A thermoplastic resin having repeating units represented by the following formula (1): wherein Z is a polycyclic aromatic hydrocarbon having three or more benzene rings condensed, each of L1 and L2 independently represents a divalent linking group, each of R1 and R2 independently represents a hydrogen atom, a halogen atom, or a substituent having 1 to 20 carbon atoms and optionally containing an aromatic group, each of j1 and j2 independently represents an integer of 1 or more, each of m and n independently represents 0 or 1, and W is at least one selected from the group represented by the following formulae (2) and (3): wherein X represents a divalent linking group.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 (?) satisfying the following mathematical formula (A): nD??0.02×?+2.040??(A) (where 1.660<nD).

Abstract: 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, R1 and R2 independently represent a C1-C12 hydrocarbon group optionally including a hydrogen atom, a halogen atom, and an aromatic group, Ar1 and Ar2 represent a C6-C10 aromatic group optionally having a substituent, L1 and L2 independently 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.

Abstract: 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.

Abstract: 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, R1 and R2 independently represent a C1-C12 hydrocarbon group optionally including a hydrogen atom, a halogen atom, and an aromatic group, Ar1 and Ar2 represent a C6-C10 aromatic group optionally having a substituent, L1 and L2 independently 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.

Abstract: 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.

Abstract: A polycarbonate resin film which has an average thickness of 10 to 150 ?m, a thickness nonuniformity of 2% or less, a retardation R(589) in the plane of the film measured at a wavelength of 589 nm of 12 nm or less, a retardation Rth(589) in the thickness direction of the film measured at a wavelength of 589 nm of 35 nm or less and is used for optical purposes.

Abstract: A resin composition, and molded articles thereof, where the resin composition simultaneously satisfies resistances, such as heat and environmental resistance, and moldability at high levels, and has excellent optical properties, such as high refractivity and low birefringence. The resin composition contains a polyester resin formed from a dicarboxylic acid component and a diol component (a) and a polycarbonate resin formed from a carbonate-forming component and a diol component (b), the diol component (a) containing a specific fluorene-containing compound and the diol component (b) containing a specific fluorene-containing compound.

Abstract: The present invention discloses an infrared absorption filter which enables a coloring matter having infrared absorptivity to be contained or dispersed uniformly in a high concentration and has excellent durability, and an infrared absorption panel comprising this infrared absorption filter. The infrared absorption filter comprises a polycarbonate resin which contains 20 to 100 mol % of a recurring unit having a fluorene skeleton represented by the formula (1) and 0 to 80 mol % of a recurring unit represented by the formula (2), and a coloring matter having infrared absorptivity.

Abstract: A polycarbonate resin film which has an average thickness of 10 to 150 ?m, a thickness nonuniformity of 2% or less, a retardation R(589) in the plane of the film measured at a wavelength of 589 nm of 12 nm or less, a retardation Rth(589) in the thickness direction of the film measured at a wavelength of 589 nm of 35 nm or less and is used for optical purposes.

Abstract: This invention seeks to provide a resin composition that can simultaneously satisfy resistances such as heat resistance and environmental resistance and moldability at high levels and that has excellent optical properties such as high refractivity and low birefringence and molded article thereof. The present invention is a resin composition containing a polyester resin formed from a dicarboxylic acid component and a diol component (a) and a polycarbonate resin formed from a carbonate-forming component and a diol component (b), the diol component (a) containing a specific fluorene-containing compound and the diol component (b) containing a specific fluorene-containing compound.

Abstract: It is an object of the present invention to provide an infrared absorption filter which enables a coloring matter having infrared absorptivity to be contained or dispersed uniformly in a high concentration and has excellent durability and an infrared absorption panel comprising this infrared absorption filter. The infrared absorption filter is composed of a polycarbonate resin which contains 20 to 100 mol % of a recurring unit having a fluorene skeleton represented by the formula (1) and 0 to 80 mol % of a recurring unit represented by the formula (2) and a coloring matter having infrared absorptivity.

Abstract: A process for producing a pentaerythritol diphosphonate represented by formula (5) characterized by (A) reacting phosphorus trichloride with pentaerythritol in the presence of an inert solvent to obtain pentaerythritol dichlorophosphite (reaction (a)), (B) reacting the pentaerythritol dichlorophosphite with an aralkyl alcohol to obtain a pentaerythritol diphosphite (reaction (b)), and (C) heat-treating the pentaerythritol diphosphite in the presence of a halogenated compound at a temperature of from 80 to 300° C. (reaction (c)): wherein Ar1 and Ar2, which may be the same as or different from each other, each represents a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms, and R3, R4, R5 and R6, which may be the same as or different from each other, each represents a hydrogen atom, a substituted or unsubstituted aryl group having from 6 to 20 carbon atoms, or a saturated or unsaturated hydrocarbon group having from 1 to 20 carbon atoms.