Abstract: Provided is a resin composition comprising: a polycarbonate resin (A) containing, as main repeating units, a unit (a-1) represented by the following formula (a-1) and a unit (a-2) represented by the following formula (a-2) (wherein, W represents a C1-20 alkylene group or a C6-20 cycloalkylene group, R represents a branched or linear-chain C1-20 alkyl group or a C6-20 cycloalkyl group optionally substituted, and m represents an integer of 0 to 10) and an acrylic resin (B), and the polycarbonate resin and the acrylic resin are in a weight ratio of 40:60 to 99:1, wherein the resin composition has a single glass transition temperature, which is in the range of 90° C. to 150° C., and the resin composition has excellent transparency, chemical resistance, surface hardness and heat resistance, and has a low photoelastic coefficient.

Abstract: A multilayer body includes at least one layer (C) including a resin composition; and at least one layer (D) including a thermoplastic resin, in which the resin composition includes a polycarbonate resin (A) and an acrylic resin (B) in a weight ratio of 40:60 to 99:1, the polycarbonate resin (A) includes, as main repeating units, a unit (a-1) represented by the following formula (a-1): and a unit (a-2) represented by the following formula (a-2): wherein W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms, or a cycloalkyl group having 6 to 20 carbon atoms and optionally having a substituent, and m represents an integer of 0 to 10, and the molar ratio of the unit (a-1) and the unit (a-2) (a-1/a-2) is 40/60 to 95/5. The multilayer body has excellent transparency, chemical resistance, surface hardness, and adhesion.

Abstract: A multilayer body includes at least one layer (A) made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) composed of an ether diol residue represented by the following formula (1) and a unit (a-2) composed of a diol residue represented by the following formula (2), and at least one layer (B) containing an aromatic polycarbonate resin (B), wherein the molar ratio of the unit (a-1) is 50 to 96 mol % and the molar ratio of the unit (a-2) is 4 to 50 mol %, with respect to 100 mol % of the total repeating units of the polycarbonate resin (A) and the proportion of the aromatic polycarbonate resin (B) in the layer (B) containing an aromatic polycarbonate resin (B) is 30% by weight or more, and the multilayer body is excellent in heat resistance, impact resistance, surface hardness, adhesion, and chemical resistance.

Abstract: The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness.

Abstract: A polycarbonate resin containing a structural unit originating from a dihydroxy compound represented by formula (1), having a boric-acid content of 100 ppm or lower and/or a tertiary-amine content of 1000 ppm by weight or lower, and having a terminal phenyl group originating from a diester carbonate represented by formula (2), wherein the concentration of the terminal phenyl group is equal to or greater than 30 ?eq/g. In formula (1), R1, R2, R3, and R4 each independently represent a hydrogen atom, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C3-C20 cycloalkyl group, a C6-C20 cycloalkoxy group, a C6-C10 aryl group, a C7-C20 aralkyl group, a C6-C10 aryloxy group, a C7-C20 aralkyloxy group, or a halogen atom, and the cyclobutane ring indicates a cis-trans isomer mixture, a cis isomer alone, or a trans isomer alone. In formula (2), R5 and R6 each independently represent a substituted or non-substituted aromatic group.

Abstract: An organic phosphorus-based compound which satisfies the following requirements (i) to (viii) and is represented by the following formula (1): (i) the organic purity should be not lower than 98%; (ii) the solubility in 20° C. water should be not higher than 0.1 g/100 g of water; (iii) the total halogen component content should be not higher than 1,000 ppm; (iv) the total volatile organic matter content should be not higher than 800 ppm; (v) the ? pH value should be not larger than 1.0; (vi) the volume standard median diameter should be not larger than 30 ?m; (vii) the maximum particle diameter should be not larger than 200 ?m; and (viii) the standard deviation represented by the following formula should be not larger than 20 ?m. Standard deviation=(d84%+d16%)/2; wherein d84%: particle diameter at a point where the cumulative curve becomes 84% (?m), and d16%: particle diameter at a point where the cumulative curve becomes 16% (?m).

Abstract: A multilayer body includes at least one layer (A) made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) composed of an ether diol residue represented by the following formula (1) and a unit (a-2) composed of a diol residue represented by the following formula (2), and at least one layer (B) containing an aromatic polycarbonate resin (B), wherein the molar ratio of the unit (a-1) is 50 to 96 mol % and the molar ratio of the unit (a-2) is 4 to 50 mol %, with respect to 100 mol % of the total repeating units of the polycarbonate resin (A) and the proportion of the aromatic polycarbonate resin (B) in the layer (B) containing an aromatic polycarbonate resin (B) is 30% by weight or more, and the multilayer body is excellent in heat resistance, impact resistance, surface hardness, adhesion, and chemical resistance.

Abstract: The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness.

Abstract: A multilayer body includes at least one layer (C) including a resin composition; and at least one layer (D) including a thermoplastic resin, in which the resin composition includes a polycarbonate resin (A) and an acrylic resin (B) in a weight ratio of 40:60 to 99:1, the polycarbonate resin (A) includes, as main repeating units, a unit (a-1) represented by the following formula (a-1): and a unit (a-2) represented by the following formula (a-2): wherein W represents an alkylene group having 1 to 20 carbon atoms or a cycloalkylene group having 6 to 20 carbon atoms, R represents a branched or linear alkyl group having 1 to 20 carbon atoms, or a cycloalkyl group having 6 to 20 carbon atoms and optionally having a substituent, and m represents an integer of 0 to 10, and the molar ratio of the unit (a-1) and the unit (a-2) (a-1/a-2) is 40/60 to 95/5. The multilayer body has excellent transparency, chemical resistance, surface hardness, and adhesion.

Abstract: An organic phosphorus-based compound which satisfies the following requirements (i) to (viii) and is represented by the following formula (1): (i) the organic purity should be not lower than 98%; (ii) the solubility in 20° C. water should be not higher than 0.1 g/100 g of water; (iii) the total halogen component content should be not higher than 1,000 ppm; (iv) the total volatile organic matter content should be not higher than 800 ppm; (v) the ? pH value should be not larger than 1.0; (vi) the volume standard median diameter should be not larger than 30 ?m; (vii) the maximum particle diameter should be not larger than 200 ?m; and (viii) the standard deviation represented by the following formula should be not larger than 20 ?m. Standard deviation=(d84%+d16%)/2; wherein d84%: particle diameter at a point where the cumulative curve becomes 84% (?m), and d16%: particle diameter at a point where the cumulative curve becomes 16% (?m).

Abstract: A flame retardant resin composition containing 1 to 100 parts by weight of (B) an organophosphorus compound (component B) represented by the following formula (1) per 100 parts by weight of (A) a resin component (component A) containing at least 60 wt % of an acrylic resin has high flame retardancy, high transparency and satisfactory physical properties: wherein X1 and X2 are the same or different, and represent alkyl groups substituted with aromatic groups represented by the following formula (2): ALAr)n??(2) wherein AL represents a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, Ar represents a phenyl group, a naphthyl group, or an anthryl group each optionally substituted, n represents an integer of 1 to 3, and Ar can be bonded to any carbon atom in AL.

Abstract: Provided is a resin composition comprising: a polycarbonate resin (A) containing, as main repeating units, a unit (a-1) represented by the following formula (a-1) and a unit (a-2) represented by the following formula (a-2) (wherein, W represents a C1-20 alkylene group or a C6-20 cycloalkylene group, R represents a branched or linear-chain C1-20 alkyl group or a C6-20 cycloalkyl group optionally substituted, and m represents an integer of 0 to 10) and an acrylic resin (B), and the polycarbonate resin and the acrylic resin are in a weight ratio of 40:60 to 99:1, wherein the resin composition has a single glass transition temperature, which is in the range of 90° C. to 150° C., and the resin composition has excellent transparency, chemical resistance, surface hardness and heat resistance, and has a low photoelastic coefficient.

Abstract: Provided is a multilayer body excellent in terms of heat resistance, low water absorbency, shock resistance, surface hardness, and adhesion, including: at least one layer made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) represented by the following formula: and a unit (a-2) represented by the following formula: (wherein R1, R2, R3, and R4 are each a hydrogen atom or a C1-5 monovalent alkyl group), the unit (a-1) and the unit (a-2) being in a molar ratio (a-1/a-2) of 32/68 to 70/30; and at least one layer made of an aromatic polycarbonate resin (B).

Abstract: A film having high transparency, weather resistance, moist heat resistance, excellent tensile characteristics, a good hue and high surface hardness. The film comprises: (a) 100 parts by weight of a polycarbonate resin (component a) containing a carbonate unit (A) represented by the following formula (A) and having a specific viscosity measured from a 20° C. methylene chloride solution of 0.2 to 0.5; (b) 0.03 to 2.5 parts by weight of at least one ultraviolet absorbent (component b) selected from the group consisting of an ultraviolet absorbent having a benzotriazole skeleton and an ultraviolet absorbent having a triazine skeleton; (c) 0.0001 to 0.02 part by weight of a coloring agent (component c); and (d) 0.

Abstract: A flame retardant resin composition containing 1 to 100 parts by weight of (B) an organophosphorus compound (component B) represented by the following formula (1) per 100 parts by weight of (A) a resin component (component A) containing at least 60 wt % of an acrylic resin has high flame retardancy, high transparency and satisfactory physical properties: wherein X1 and X2 are the same or different, and represent alkyl groups substituted with aromatic groups represented by the following formula (2): ?AL??Ar?n??(2) wherein AL represents a branched or linear aliphatic hydrocarbon group having 1 to 5 carbon atoms, Ar represents a phenyl group, a naphthyl group, or an anthryl group each optionally substituted, n represents an integer of 1 to 3, and Ar can be bonded to any carbon atom in AL.

Abstract: Provided is a multilayer body excellent in terms of heat resistance, low water absorbency, shock resistance, surface hardness, and adhesion, including: at least one layer made of a polycarbonate resin (A) whose main repeating units include a unit (a-1) represented by the following formula: and a unit (a-2) represented by the following formula: (wherein R1, R2, R3, and R4 are each a hydrogen atom or a C1-5 monovalent alkyl group), the unit (a-1) and the unit (a-2) being in a molar ratio (a-1/a-2) of 32/68 to 70/30; and at least one layer made of an aromatic polycarbonate resin (B).

Abstract: A molded article such as a resin window or a lamp lens for vehicles which is formed from a polycarbonate and excellent in heat resistance, weather resistance, low water absorption, surface hardness and low-temperature impact properties. The molded article is formed from a polycarbonate which contains a unit (A) represented by the following formula (A) in an amount of 50 mol % or more based on the total of all recurring units and has a maximum impact energy of 20 J or more in a high-speed surface impact test based on ASTM D3763 in a ?20° C. environment and a brittle fracture rate of 50% or less.

Abstract: A polycarbonate resin which is excellent in heat resistance, boiling water resistance and surface hardness and has a low water absorption coefficient. The polycarbonate resin comprises a unit (A) represented by the following formula and a unit (B) represented by the following formula as main recurring units, wherein the molar ratio (A/B) of the unit (A) to the unit (B) is 30/70 to 99/1. In the above formula, X is an alkylene group having 3 to 20 carbon atoms or cycloalkylene group having 3 to 20 carbon atoms, R is an alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms, and “m” is an integer of 1 to 10.

Abstract: A copolycarbonate having a low water absorption coefficient and excellent heat resistance, low temperature characteristics and surface hardness. The copolycarbonate (Z) of the present invention contains a unit (A) represented by the following formula and a unit (B) represented by the following formula (B) as main recurring units, the (A/Bn=1) molar ratio of the unit (A) and the unit (Bn=1) being 40/60 to 99/1. The unit (Bn=1) is a single unit constituting a block. (R1) is an alkylene group or cycloalkylene group, all of which may be substituted by an aromatic group having 6 to 12 carbon atoms. R2 is an alkylene group, cycloalkylene group or arylene group, all of which may be substituted by an aromatic group having 6 to 12 carbon atoms. “r” and “s” are each independently an integer of 0 to 4 “l” is 0 or 1. “m” is 0 or 1. “n” is an integer of 1 to 100.

Abstract: A polycarbonate resin which is excellent in heat resistance, boiling water resistance and surface hardness and has a low water absorption coefficient. The polycarbonate resin comprises a unit (A) represented by the following formula and a unit (B) represented by the following formula as main recurring units, wherein the molar ratio (A/B) of the unit (A) to the unit (B) is 30/70 to 99/1. (In the above formula, X is an alkylene group having 3 to 20 carbon atoms or cycloalkylene group having 3 to 20 carbon atoms, R is an alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms, and “m” is an integer of 1 to 10.