Abstract: A polycarbonate resin composition including: a carbonate structural unit (X) derived from an aliphatic dihydroxy compound (1) represented by the following formula (1); and, a carbonate structural unit (Y) derived from a dihydroxy compound (2) satisfying the following requirement I, wherein the polycarbonate resin composition has a melting point peak temperature when the melting point peak temperature is measured using a differential scanning calorimeter and heating the polycarbonate resin composition at a heating rate of 20° C./min. <Requirement I> A polycarbonate resin (2) obtained by polymerizing the dihydroxy compound (2) and a carbonate source by a transesterification method has a melting point peak temperature when the melting point peak temperature is measured using a differential scanning calorimeter and heating the polycarbonate resin (2) at a heating rate of 20° C./min. (In the formula (1), n is an integer of 2 or more.

Abstract: A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CR11R12—, —O—, —CO—, —S—, —SO—, or —SO2—, R11 and R12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R11 and R12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.

Abstract: A polycarbonate resin composition containing a carbonate structural unit (X) derived from an aromatic dihydroxy compound represented by the following formula (1), and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by the following formula (2), wherein the content of the carbonate structural unit (X) in 100 mol % of all carbonate structural units of the polycarbonate resin composition is 31.6 mol % or more. Alternatively, a polycarbonate resin composition containing a carbonate structural unit (X) derived from an aromatic dihydroxy compound represented by the following formula (1), and a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by the following formula (2), wherein a molar ratio (Y)/(X) of the content of the carbonate structural unit (Y) to the carbonate structural unit (X) is 0.33 or more and 2.95 or less.

Abstract: A polycarbonate resin composition including a carbonate structural unit (X) derived from an aromatic dihydroxy compound represented by the following formula (1), a carbonate structural unit (Y) derived from an aromatic dihydroxy compound represented by the following formula (2), and a carbonate structural unit (Z) derived from an aromatic dihydroxy compound represented by the following formula (3). A molar ratio of the content of the carbonate structural unit (Y) to the carbonate structural unit (X) is 0.65 or more, and the content of the carbonate structural units (Y) in 100 mol % of all carbonate structural units of the polycarbonate resin composition is 49 mol % or less. (R1 and R2 represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group. R1 and R2 may be bonded to each other to form a ring) (W represents —O—, —S—, —SO2—, or —CR3R4—.

Abstract: A thermoplastic resin composition including a polycarbonate resin with a structural unit (A) represented by the following formula (1), wherein a hydrolysate produced by hydrolyzing the polycarbonate resin contains dihydroxy compounds represented by the following formulae (2) to (4), and a total amount of the dihydroxy compound represented by the formula (3) and the dihydroxy compound represented by the formula (4) in the hydrolysate is 0.85% by mass or more of an amount of the dihydroxy compound represented by the formula (2).

Abstract: A formed product produced by using a thermoplastic resin composition comprising a polycarbonate resin with a repeating unit (A) represented by the following general formula (1) and a repeating unit (B) represented by the following general formula (2). R1 and R2 independently denote a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group. The alkyl groups in R1 and R2 may be bonded together to form a ring. R3 and R4 independently denote a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group. X denotes a single bond or a divalent organic group represented by the following general formula (3). R6 to R9 independently denote a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms or a substituted or unsubstituted aryl group.

Abstract: A bisphenol composition includes 95% or more by mass of a bisphenol and 200 mass ppm or more of a compound represented by the following general formula (II): In formula (II), R21 and R22 denote a methyl group or a hydrogen atom; R22 is a methyl group when R21 is a hydrogen atom; R22 is a hydrogen atom when R21 is a methyl group; R23 to R25 independently denote a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and R23, R24, and R25 may be bonded or cross-linked between two of the groups. A method for producing a polycarbonate resin using the bisphenol composition is also described.

Abstract: A bisphenol composition including 95% or more by mass of a bisphenol, wherein a bisphenol represented by the following general formula (II) in the bisphenol composition constitutes 150 mass ppm or more, and the bisphenol composition has a methanol dissolution color (Hazen color number) of 2 or less, In formula (II), X denotes a single bond, —CR11R12—, —O—, —CO—, —S—, —SO—, or —SO2—, R11 and R12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R11 and R12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.

Abstract: The invention provides a glittering resin composition which includes: a polycarbonate resin that contains structural units derived from a dihydroxy compound having the portion represented by the following general formula (1) as a part of the structure thereof; and glittering particles in an amount of 0.1 parts by weight or more and 10 parts by weight or less per 100 parts by weight of the polycarbonate resin, wherein the glittering particles are inorganic particles (excluding metal particles) coated with a metal or a metal oxide or are metal particles: provided that a case where the portion represented by general formula (1) is a part of —CH2—O—H is excluded.

Abstract: An object of the present invention is to provide a polycarbonate resin composition and a molded article, which are excellent in jet-blackness, image sharpness, impact resistance, scratch resistance owing to high hardness, flame retardancy and heat retention stability. The present invention provides a resin composition comprising a polycarbonate resin comprising a structural unit derived from a cyclic ether structure-containing dihydroxy compound and a coloring agent, which is a polycarbonate resin composition having an L* value of 6 or less as measured by the reflected light method of JIS K7105; and a molded article using the resin composition. The resin composition and the molded article of the present invention can be used over a wide range of fields allowing a product to be imparted with a high-grade appearance and a dignified impression.

Abstract: An object of the present invention is to provide a retardation film succeeded in solving those conventional problems, that is, a retardation film insusceptible to color dropout or color shift even under environment of severe temperature or humidity conditions and capable of being produced by a melt film-forming method. The retardation film of the present invention satisfies the relationships of the following formulae (A) and (B): 0.7<R1(450)/R1(550)<1??Formula (A): |R2(450)/R2(550)?R1(450)/R1(550)|<0.

Abstract: The present invention is a method for producing a polycarbonate resin, comprising performing polycondensation through a transesterification reaction by using a catalyst and using a dihydroxy compound and a carbonic acid diester as raw material monomers, and feeding the produced polycarbonate resin to an extruder, wherein the dihydroxy compound contains at least a dihydroxy compound having a moiety represented by formula (1) in a part of the structure, the dihydroxy compound having a moiety represented by formula (1) contains a compound having a cyclic ether structure, and the temperature at the time of feeding the polycarbonate resin to the extruder is from 180° C. to less than 250° C., with the proviso excluding the case where the moiety represented by formula (1) is a part of —CH2—O—H CH2—O??(1).

Abstract: The invention provides polycarbonate resins which are excellent in terms of light resistance, transparency, hue, heat resistance, thermal stability, and mechanical strength. The invention relates to a polycarbonate resin composition containing: a polycarbonate resin at least containing structural units derived from a dihydroxy compound having the portion represented by the following formula (1) as part of the structure thereof; and a bluing agent. The invention further relates to a polycarbonate resin composition including: a polycarbonate resin (A) containing structural units derived from a dihydroxy compound represented by the following formula (2) as part of the structure thereof; and a bluing agent. CH2—O??(1) The case where the portion represented by the general formula (1) constitutes —CH2—O—H is excluded.

Abstract: The present invention relates to a transparent film obtained by molding a polycarbonate resin composition comprising a specific weight of (A) a polycarbonate resin containing (a) a specific structural unit and (b) a specific structural unit, and a specific weight of (B) a resin having a composition different from that of the polycarbonate resin (A), with a specific absolute value of the difference in the glass transition temperature between the resin (B) and the polycarbonate resin (A) and a specific absolute value of the difference in the refractive index, wherein in the transparent film, the ratio of the retardation measured at a wavelength of 450 nm to the retardation measured at a wavelength of 550 nm satisfies a specific formula.

Abstract: The invention is to provide a polycarbonate resin composition and a molded polycarbonate resin article which combine excellent transparency and strength and which are suitable for use in the field of building materials, electrical/electronic field, automotive field, field of optical parts, etc. The invention relates to a polycarbonate resin composition containing a polycarbonate resin and an impact strength modifier, the polycarbonate resin containing structural units which are derived from a dihydroxy compound that has the portion represented by the following general formula (1) as part of the structure thereof and having a glass transition temperature lower than 145° C. and a molded polycarbonate resin article obtained by molding the composition. The polycarbonate resin composition gives a molded object having a thickness of 3 mm which has a total light transmittance of 60% or higher.

Abstract: The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin.

Abstract: The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin.

Abstract: A retardation film insusceptible to color dropout or color shift even under environment of severe temperature or humidity conditions and capable of being produced by a melt film-forming method. The retardation film is obtained by molding at least one polymer selected from polycarbonate and polyester carbonate each having a glass transition temperature of 110 to 180° C. and satisfies the relationships of the following formulae (A) and (B): 0.7<R1(450)/R1(550)<1??Formula (A): |R2(450)/R2(550)?R1(450)/R1(550)|<0.020.

Abstract: The polycarbonate resin of the invention includes a first structural unit derived from a dihydroxy compound represented by a general formula (1), a second structural unit derived from a dihydroxy compound represented by a general formula (2), and a third structural unit derived from at least one dihydroxy compound selected from the group consisting of a dihydroxy compound represented by a general formula (3), a dihydroxy compound represented by a general formula (4), a dihydroxy compound represented by a general formula (5), and a dihydroxy compound represented by a general formula (6), and in which the first structural unit derived from a dihydroxy compound represented by the general formula (1) accounts for 18% by mole or more of the polycarbonate resin. The above general formulae (1) to (6) are described in the specification of the present application.

Abstract: An object of the present invention is to provide a retardation film succeeded in solving those conventional problems, that is, a retardation film insusceptible to color dropout or color shift even under environment of severe temperature or humidity conditions and capable of being produced by a melt film-forming method. The retardation film of the present invention satisfies the relationships of the following formulae (A) and (B): 0.7<R1(450)/R1(550)<1??Formula (A): |R2(450)/R2(550)?R1(450)/R1(550)|<0.