Abstract: A fluorene derivative represented by General Formula (1) below. X1—Y—X2??General Formula (1) In the General Formula (1), X1 represents a cyclic carbonate group including a carbonate bond [—O—C(?O)—O—], X2 represents a cyclic carbonate group including a carbonate bond [—O—C(?O)—O—], and Y represents a bivalent group including a 9,9-bisaryl fluorene skeleton.

Abstract: A process for manufacturing a polycarbonate composition includes melt polymerizing a dihydroxy compound and a carbonate compound in the presence of a catalyst to form a polycarbonate; and adding 1 to 400 ppm of glycerol tristearate to form the polycarbonate composition, wherein the polycarbonate composition is unquenched.

Abstract: A process for the manufacture of a modified poly(alkylene carbonate) comprising compounding i) at least one poly(alkylene carbonate) and at least one modifying agent having at least three carboxylic acid groups, or ii) at least one carboxylic acid group and at least one anhydride group, or iii) at least two anhydride groups, at a temperature of 120 to 240° C.

Abstract: The present invention relates to a novel polyorganosiloxane capable of producing a copolycarbonate having improved chemical resistance and flame retardancy while maintaining the intrinsic physical properties of a polycarbonate resin and to a copolycarbonate prepared by using the same.

Abstract: Provided is a resin composition having weather resistance and low-temperature impact resistance, which are the problems of a poly(1,4-cyclohexylene dimethylene terephthalate) copolyester resin, and sustaining the chemical resistance and room-temperature impact resistance of poly(1,4-cyclohexylene dimethylene terephthalate) copolyester resin. It is a resin composition containing a poly(1,4-cyclohexylene dimethylene terephthalate) copolyester resin and a polycarbonate resin, in which the poly(1,4-cyclohexylene dimethylene terephthalate) copolyester resin is contained at 60 to 95% by weight and the polycarbonate resin is contained at 5 to 40% by weight.

Abstract: A polycarbonate resin composition including: a polycarbonate resin (A) which has a constitutional unit (a) represented by general formula (4); and a polycarbonate resin (B) which has a constitutional unit (b) represented by general formula (5). (In formula (4), X represents an alkylene group having 1 to 4 carbon atoms.) (In formula (5), R1 and R2 independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, a cycloalkyl group having 5 to 20 carbon atoms, a cycloalkoxyl group having 5 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an aryloxy group having 6 to 20 carbon atoms; and Y represents an alkylene group having 1 to 4 carbon atoms.

Abstract: A sticker for spacing wood is extruded from an alloy that includes polycarbonate resin and polysulfone resin. The sticker can have a variety of different configurations, including a top surface that includes contact points that have an area substantially smaller than the area of the top surface, a single or multiple internal longitudinal hallow chambers separated by multiple reinforcing members, longitudinal external grooves that allow airflow, lateral external grooves that intersect the longitudinal external grooves, curved sides for a version where the stickers are placed manually, and substantially straight sides for a version where the stickers are placed by a machine. The sticker is extremely durable and can withstand hundreds or thousands of drying cycles.

Abstract: To provide a polycarbonate resin composition excellent in surface hardness and impact strength. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; (ii) the weight ratio of the polycarbonate resin (a) to the polycarbonate resin (b) in the polycarbonate resin is from 1:99 to 45:55; (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO15184; and (iv) the Charpy impact strength of the polycarbonate resin composition is higher than the Charpy impact strength of the polycarbonate resin (a).

Abstract: There is provided a novel material used for solar cells that can contribute to the improvement in maximum output of solar cells. A film-forming material for forming a light-collecting film on a transparent electrode of a solar cell, including an aromatic group-containing organic polymer compound (A), wherein the film-forming material exhibits an index of refraction of 1.5 to 2.0 at a wavelength of 633 nm and a transmittance of 95% or more with respect to light having a wavelength of 400 nm, and a solar cell obtained by coating a cured film made from the film-forming material on a surface of a transparent electrode.

Abstract: Alkyl and/or alkenyl glycerol carbamate prepared by reacting a carbonate selected from the group consisting of glycerol carbonate, diglycerol carbonate, polyglycerol carbonate and mixtures thereof, with an amine of the general formula (I): HNR1R2??(I) wherein R1 represents a hydrogen atom or a hydrocarbon group selected from the group consisting of alkyl groups and alkenyl groups having from 1 to 22 carbon atoms and R2 represents a hydrocarbon group selected from the group consisting of alkyl groups and alkenyl groups having from 4 to 22 carbon atoms, and cyclic alkyl groups having 5 or 6 carbon atoms, are described along with methods for their use as pearlizing agents in surface-active preparations.

Abstract: The present inventions provide processes for producing a highly polymerized aromatic polycarbonate resin comprising a highly-polymerizing process wherein an aromatic polycarbonate is reacted with an aliphatic diol compound represented by formula (g1) in the presence of a transesterification catalyst to increase the molecular weight: wherein Ra and Rb each independently represent a hydrogen atom, a linear or branched alkyl group having 1-12 carbon atoms or a phenyl group, and “m” represents an integer of 1-30.

Abstract: Blend (B) comprising: at least one aromatic polycarbonate (P1), and at least one polyarylene (P2), more than 50 wt. % of the recurring units thereof are optionally substituted arylene groups [recurring units (R2)], each of said recurring units (R2) being linked by each of its two ends to two other optionally substituted arylene groups via a direct C—C linkage, and said recurring units (R2) being a mix (M) consisting of: between 0 and 75 mole %, based on the total number of moles of recurring units (R2), of rigid rod-forming arylene units (R2a), optionally substituted by at least one monovalent substituting group, with between 25 and 100 mole %, based on the total number of moles of recurring units (R2), of kink-forming arylene units (R2b), optionally substituted by at least one monovalent substituting group. Article or part of an article comprising the blend (B).

Abstract: Aromatic dicyanate compounds which comprise aliphatic moieties having at least about six carbon atoms and resins and thermoset products based on these compounds.

Abstract: A silane compound is represented by Formula 1: wherein each R1 is independently a single bond, an ether group, a carbonyl group, a thioether group, a sulfone group, or a substituted or unsubstituted C1 to C20 hydrocarbon group, R2 and R3 are each independently a substituted or unsubstituted C1 to C20 hydrocarbon group, each R4 is independently hydrogen or a C1 to C5 hydrocarbon group, each X is independently halogen, a hydroxyl group, C1 to C20 alkoxy, or C6 to C20 aryloxy, each Y is independently a single bond, an amide group, a thioester group, a hydroxyethylene group, a carbonyl group, an aromatic group or an ester group, a and b are each independently an integer from 1 to 3, a+b is 4, no is an integer from 0 to 5, n is an integer from 5 to 50, and p and q are each independently an integer from 0 to 4.

Abstract: A high molecular weight polycarbonate resin is continuously produced by subjecting an aromatic polycarbonate prepolymer and an aliphatic diol compound to a linking and highly polymerizing reaction. Even an aliphatic diol compound having a comparatively low boiling point can be allowed to efficiently contribute to the linking and highly polymerizing reaction. An aromatic polycarbonate prepolymer is produced by a polycondensation reaction between an aromatic dihydroxy compound and a diester carbonate, adding an aliphatic diol compound having an aliphatic group bonding to a terminal hydroxyl group to obtain a prepolymer mixture, and subjecting the resulting prepolymer mixture to a linking and highly polymerizing reaction under reduced pressure.

Abstract: A polymeric radiation-source with customized geometries to maximize receipt of radiation into treatment areas that is formed from either radioisotopes molecularly bonded to a polymer or radioisotopes encased within a polymer.

Abstract: This invention relates to compositions, and related compounds and methods, of conjugates of immunomodulatory agents and polymers or unit(s) thereof. The conjugates may be contained within synthetic nanocarriers, and the immunomodulatory agents may be released from the synthetic nanocarriers in a pH sensitive manner.

Abstract: At least two or more components of thermoplastic resins are compounded by chaotic mixing to form a polymer alloy with a sophisticatedly controlled dispersed phase structure. In the polymer alloy, a dispersed phase having a non-periodic structure with a correlation length of 0.001 ?m to 0.5 ?m and having a compactness (C) of 0.05?(C)?0.8, wherein the compactness (C) can form a molded product that also has transparency while maintaining the original good heat resistance or mechanical properties of the resins blended.

Abstract: The present invention provides an improved method for continuously producing a high-molecular-weight polycarbonate resin by carrying out a linking and highly-polymerizing reaction of an aromatic polycarbonate prepolymer with an aliphatic diol compound wherein the retention time of the reaction mixture in the linking and highly-polymerizing reactor is shortened to achieve excellent performance.

Abstract: Provided is a polycarbonate resin composition pellet, which has a light transmittance at a wavelength of 380 nm of 97.0% or more when the light transmittance is measured by using a methylene chloride solution having a concentration of 12 g/dL, the solution being charged into a quartz glass cell having an optical path length of 5 cm, and which has a viscosity-average molecular weight (Mv) of from 11,000 to 22,000.

Abstract: A plastic article having a thickness of about 2 mm to about 3.2 mm is disclosed. The article is formed from a thermoplastic composition that includes a first polymer that is a polycarbonate, a second polymer that is a polyphthalatecarbonate, a perfluoroakyl sulfonate salt; and a cyclic siloxane compound. The thermoplastic has a light transmittance at a thickness of 3.2 mm of at least 86% according to ASTM D1003-11E1, a UL94 flammability rating of V0, a notched Izod impact strength at a thickness of 3.2 mm of at least 500 J/m according to ASTM D256-05 with a 2.27 kg weight at a, and a heat deflection temperature at a thickness of 3.2 mm of at least 160° C. according to ASTM D648-06 under a load of 0.45 MPa.

Abstract: Hyperbranched polycarbonates having stabilizing groups, prepared by reaction of (a) at least one compound having at least three alcoholic hydroxyl groups per molecule with (b) at least one reagent of the general formula I (c) and at least one reagent of the general formula X3-(A1)m-X4, where the variables are defined as follows: X1, X2 are identical or different and are selected from among halogen, C1-C10-alkoxy, C6-C10-aryloxy and O—C(?O)-halogen, X3 is a functional group selected from among OH, SH, NH2, NH—C1-C4-alkyl, iso-cyanate, epoxy, COOH, COOR12, C(?O)—O—C(?O), C(?O)—Cl, R12 is C1-C4-alkyl or C6-C10-aryl, A1 is a spacer or a single bond, m is zero or one. X4 is a group selected from among phenol groups, benzophenones, aromatic amines and nitrogen-comprising heterocycles, in each case substituted or unsubstituted.

Abstract: Provided is a method for improving thermal stability of polypropylene carbonate and, more particularly, a method of end capping a molecular chain of polypropylene carbonate using a urethane group by adding isocyanates or diisocyanates to a polypropylene carbonate resin, which may optionally be a mixture containing tertiary polyol, so as to delay thermal degradation of the polypropylene carbonate at a high temperature, thereby securing desired thermal stability. Especially, the method capable of being easily applied to reactive extrusion after preparing the polypropylene carbonate has been proposed, thus simplifying production processes and ensuring economical advantages. Moreover, the above method does not deteriorate transparency and specific smoke density characteristics at combustion, which are advantages of the polypropylene carbonate.

Abstract: In one embodiment, a tool, comprising: a tool stationary portion comprising a nozzle and a film gate; and a tool movable portion comprising a shut off pin opposite the nozzle and the film gate; wherein the shut off pin prevents polymer melt in the nozzle from leaking into a cavity of the tool after injection of polymer into the tool.

Abstract: Processes for increasing the chemical resistance of a surface of a formed product are disclosed. The formed product is produced from a polymeric composition comprising a photoactive additive containing photoactive groups derived from a dihydroxybenzophenone. The surface of the formed product is then exposed to ultraviolet light to cause crosslinking of the photoactive additive and produce a crosslinked surface. The crosslinking enhances the chemical resistance of the surface. Various means for controlling the depth of the crosslinking are also discussed.

Abstract: Thin walled products having good scratch resistance are disclosed, as are processes for making such products (e.g. films, sheets, and thin walled articles). The product includes a thin layer formed from (A) a cross-linkable polycarbonate resin having endcaps derived from a monohydroxybenzophenone; and (B) if desired, a base polymeric resin. When exposed to ultraviolet light, crosslinking will occur in the layer with the cross-linkable polycarbonate resin, enhancing the scratch resistance properties of the thin layer and the overall product.

Abstract: The invention relates to blends of special copolycarbonates and special polyetherimides or special polyarylsulfones which have good metallizability and to compositions of said copolycarbonate blends optionally containing additives which are selected from the group of thermo stabilizers and release agents, to the use thereof for producing molded parts and to molded parts produced therefrom. The invention further relates to multilayer products comprising a substrate which contains the compositions according to the invention, said products comprising at least one further layer, preferably a metal layer, on at least one side, and to methods for producing said products.

Abstract: An ammunition article is provided which comprises a casing and a cap wherein the casing is formed from a polymeric material that has a room temperature notched Izod impact value greater than about 10 ft lbs/in and then has a ratio of notched Izod impact value at room temperature to notch Izod impact value at about ?40° C. of less than about 4.

Abstract: The present invention provides a melt polymerization reactor system and method of producing polycarbonate using a late-addition catalyst formulation having a melt transesterification catalyst dispersed in a liquid carrier system which preferably includes less than 10 wt % water. The formulation also preferably includes a liquid carrier system having phenol and a cosolvent. The melt transesterification catalyst can be present in the formulation in a range of 50 ppm to 60,000 ppm.

Abstract: The present inventions provide a novel polycarbonate copolymer having high fluidity and high molecular weight which is formed of a structural unit derived from an aliphatic diol compound and a structural unit derived from an aromatic dihydroxy compound, having a structure represented by the formula (III): having the content of the structural unit derived from the aliphatic diol compound of 1-30 mol %, having the Q-value (280° C., 160 kg load) in the range from 0.02 to 1.

Abstract: A branched polycarbonate having a branching derived from a polyfunctional compound, comprising a repeating unit represented by general formula (1), a branched structure (a) derived from the polyfunctional compound and a branched structure (b) including at least one selected from the group consisting of branched structures represented by general formulas (2), (3) and (4), the total content of (a) and (b) with respect to (1) being 0.2-1.0 mol %, the ratio of (b) with respect to the total of (a) and (b) being 0.1-0.6, and the ratio of (2) with respect to the content of (b) being 0.5 or greater. [In formulas, Ar represents a divalent aromatic residue and Ar? represents a trivalent aromatic residue.

Abstract: A carbon nanostructure that is free of a growth substrate can include a plurality of carbon nanotubes that are branched, crosslinked, and share common walls with one another. The carbon nanostructure can be released from a growth substrate in the form of a flake material. Optionally, the carbon nanotubes of the carbon nanostructure can be coated, such as with a polymer, or a filler material can be present within the porosity of the carbon nanostructure. Methods for forming a carbon nanostructure that is free of a growth substrate can include providing a carbon nanostructure adhered to a growth substrate, and removing the carbon nanostructure from the growth substrate to form a carbon nanostructure that is free of the growth substrate. Various techniques can be used to affect removal of the carbon nanostructure from the growth substrate. Isolation of the carbon nanostructure can further employ various wet and/or dry separation techniques.

Abstract: A polycarbonate diol comprising repeating units represented by the following formula (A) and a terminal hydroxy group, 60-100 mol % of the repeating units represented by the formula (A) being repeating units represented by the following formula (B) or (C). The amount of the repeating units represented by the formula (B) is 60-100 mol % based on the total amount of the repeating units represented by the formula (A). The polycarbonate diol has a terminal primary OH ratio of 95% or higher. (A) (In the formula, R represents a C2-12 divalent aliphatic or alicyclic hydrocarbon.

Abstract: The present invention is directed to polymeric materials made of biodegradable, bioabsorbable triblock copolymers and implantable devices (e.g., drug-delivery stents) containing such polymeric materials. The polymeric materials may also contain at least one therapeutic substance. The polymeric materials are formulated so as to improve the mechanical and adhesion properties, degradation, biocompatibility and drug permeability of such materials and, thus, implantable devices formed of such materials.

Abstract: Disclosed herein are methods and compositions of polycarbonate blends having, among other characteristics, improved heat resistance. The resulting polycarbonate blends, comprising a first polycarbonate comprising structural repeating units derived from bisphenol acetophenone and optionally a second polycarbonate polymer comprising structural repeating units derived from bisphenol A, can be used in the manufacture of articles while still retaining the advantageous physical properties of blended polycarbonate compositions with improved heat resistance. The disclosed polycarbonate blends optionally comprise one or more polycarbonate blend additives. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: Disclosed herein are: a method for producing a resin composite material in which a carbon material having a graphene structure is dispersed in a synthetic resin and which has high mechanical strength; and a resin composite material obtained by the method. More specifically, disclosed herein are: a method for producing a resin composite material in which a carbon material having a graphene structure is uniformly dispersed in a synthetic resin selected from the group consisting of a crystalline resin and an amorphous resin, the method comprising, when the synthetic resin is a crystalline resin, shear-kneading the crystalline resin and the carbon material with a shear-kneading device at a temperature lower than a melting point of the crystalline resin and, when the synthetic resin is an amorphous resin, shear-kneading the amorphous resin and the carbon material with a shear-kneading device at a temperature close to a Tg of the crystalline resin; and a resin composite material obtained by the production method.

Abstract: A modified ion exchange resin catalyst having an attached dimethyl thiazolidine promoter is disclosed. Also disclosed is a process for catalyzing condensation reactions between phenols and ketones, wherein reactants are contacted with a modified ion exchange resin catalyst having an attached dimethyl thiazolidine promoter. Also disclosed is a process for catalyzing condensation reactions between phenols and ketones that does not utilize a bulk promoter.

Abstract: Disclosed are random copoly(phosphonate carbonate)s with the high molecular weight and narrow molecular weight distribution exhibiting a superior combination of properties compared to prior art.

Abstract: This disclosure relates generally to polysulfone compositions whose residual phenolic monomers or phenolic degradation products exhibit little or no estradiol binding activity. Also disclosed are methods for making the disclosed polysulfones and articles of manufacture comprising the disclosed polysulfones.

Abstract: A polymer composition comprising a mixture of a) a first resin component comprising a polyaryl ether ketone, a polyaryl ketone, a polyether ketone, a polyether ether ketone, or a combination of two or more of the foregoing, and b) a second resin component comprising a specific type of copolycarbonate, wherein the mixture has at least two glass transition temperatures, as measured by ASTM method D5418, wherein the first glass transition temperature is from 120 to 160° C. and the second glass transition temperature is from 170 to 280° C. is disclosed. The compositions have improved properties such as improved load bearing capability at high temperature, better impact strength, and a high crystallization temperature.

Abstract: To provide a polycarbonate resin composition excellent in the surface hardness, the heat resistance, the moldability and the flame retardancy. A polycarbonate resin composition comprising at least a polycarbonate resin (a) and a polycarbonate resin (b) having structural units different from the polycarbonate resin (a), which satisfies the following requirements: (i) the pencil hardness of the polycarbonate resin (a) as specified by ISO 15184 is higher than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184; (ii) the glass transition point Tg(a) of the polycarbonate resin (a) and the glass transition point Tg(b) of the polycarbonate resin (b) satisfy the relation of the following (Formula 1): Tg(b)?45° C.<Tg(a)<Tg(b)?10° C.??(Formula 1) (iii) the pencil hardness of the polycarbonate resin composition as specified by ISO 15184 is higher by at least two ranks than the pencil hardness of the polycarbonate resin (b) as specified by ISO 15184.

Abstract: This invention relates to compositions, and related compounds and methods, of conjugates of immunomodulatory agents and polymers or unit(s) thereof. The conjugates may be contained within synthetic nanocarriers, and the immunomodulatory agents may be released from the synthetic nanocarriers in a pH sensitive manner.

Abstract: A thermoplastic resin composition is provided having excellent flowability, high crystallization characteristics, high transparency and excellent processability in melt processing to resin molded products, sheets, films, fibers and pipes. The thermoplastic resin composition includes 100 parts by weight of (A) a thermoplastic resin; and 0.5 to 50 parts by weight of (B) a cyclic poly(phenylene ether ketone) that is expressed by General Formula (I) given below and has phenylene ketone shown by -Ph-CO— and phenylene ether shown by -Ph-O— as are repeating structural unit: wherein Ph in Formula represents a para-phenylene structure; o and p are respectively integral numbers of not less than 1; and m is an integral number of 2 to 40.

Abstract: A polymer includes at least one pendant dioxirane moiety represented by Formula III or IV: In Formulas III and IV, R1 is absent or is alkylene, perhaloalkylene, cycloalkylene, arylene, heteroarylene, heterocyclylene, amino, carbonyl, carboxyl, alkylcarboxy, carboxyalkyl or alkylcarboxyalkyl; R2 is an electron withdrawing group; R8 is —N+R4R5 or alkylene; R9 is —N+R4R5 or alkylene; each R4 is independently H, alkyl, or cycloalkyl; and each R5 is independently H, alkyl, or cycloalkyl.

Abstract: A fluorescing dry toner particle comprises a polymeric binder phase comprising a non-fluorescing binder polymer and a polymeric fluorescing colorant dispersed within the non-fluorescing binder polymer. The polymeric fluorescing colorant comprises a fluorescing moiety that is covalently attached to a colorant polymer that is the same or different than the non-fluorescing binder polymer, but the polymeric fluorescing colorant is blendable with the non-fluorescing binder polymer to form a homogeneous polymeric binder matrix, and is present in an amount of at least 1 weight % and up to and including 40 weight %, based on the total fluorescing dry toner particle weight. These fluorescing dry toner particles can be used in various dry developers to provide fluorescing toner images with or without non-fluorescing color toner images.

Abstract: In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. In some embodiments, light emitting device comprises: a lighting element located in a housing. The housing is formed from a plastic composition comprising: the polycarbonate composition and a conversion material. After the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10?4 seconds when the excitation source is removed.

Abstract: A flame retardant resin composition in which an acrylonitrile-styrene based polymer, into which sulfonic acid groups and/or sulfonate groups have been introduced by sulfonating processing with a sulfonating agent containing less than 3 wt % of moisture, is contained in a resin to be made flame retardant, so that flame retardant properties will be conferred on the resin flame resistant.

Abstract: A method for highly polymerizing an aromatic polycarbonate resin, which enables the increase in molecular weight of the aromatic polycarbonate resin satisfactorily while keeping good quality of the resin. An aromatic polycarbonate is linked to an aliphatic diol compound having a boiling point of 240° C. or higher (preferably in an amount of 0.01 to 1.0 mole per mole of the total amount of the terminal of the aromatic polycarbonate) through a transesterification reaction in the presence of a transesterification catalyst under reduced pressure conditions (preferably at a reduced pressure ranging from 13 kPaA (100 torr) to 0.01 kPaA (0.01 torr)), thereby increasing the molecular weight of the resulting molecule. The weight average molecular weight (Mw) of the aromatic polycarbonate after the transesterification reaction can be increased preferably by 5,000 or more compared to that of the aromatic polycarbonate before the transesterification reaction.

Abstract: The present invention relates to a polycarbonate resin composition (X) which includes a polycarbonate resin (A) and an aromatic polycarbonate resin (B), the polycarbonate resin (A) including a constitutional unit derived from a dihydroxy compound (a) having, as part of the structure thereof, a site represented by the following formula (1) and a constitutional unit derived from a dihydroxy compound (b) of an aliphatic hydrocarbon, wherein the proportion of the constitutional unit derived from the dihydroxy compound (b) of an aliphatic hydrocarbon based on all constitutional units each derived from a dihydroxy compound in the polycarbonate resin (A) is 45% by mole or more. (The case where the site represented by the formula (1) is part of —CH2—O—H is omitted.

Abstract: A branched polycarbonate having a branching derived from a polyfunctional compound, comprising a repeating unit represented by general formula (1), a branched structure (a) derived from the polyfunctional compound and a branched structure (b) including at least one selected from the group consisting of branched structures represented by general formulas (2), (3) and (4), the total content of (a) and (b) with respect to (1) being 0.2-1.0 mol %, the ratio of (b) with respect to the total of (a) and (b) being 0.1-0.6, and the ratio of (2) with respect to the content of (b) being 0.5 or greater. [In formulas, Ar represents a divalent aromatic residue and Ar? represents a trivalent aromatic residue.