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,

##STR00001##

In formula (II), X denotes a single bond, —CR.sup.11R.sup.12—, —O—, —CO—, —S—, —SO—, or —SO.sub.2—, R.sup.11 and R.sup.12 independently denote a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R.sup.11 and R.sup.12 may be bonded to each other to form a ring. A method for producing a polycarbonate resin using the bisphenol composition is also described.

The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently. A method for producing a polycarbonate is characterized in comprising the step of irradiating a light to a composition comprising a C.sub.1-4 halogenated hydrocarbon, the specific diol compound and the specific base in the presence of oxygen.

The objective of the present invention is to provide a method for producing a polycarbonate safely and efficiently. A method for producing a polycarbonate is characterized in comprising the step of irradiating a light to a composition comprising a C.sub.1-4 halogenated hydrocarbon, the specific diol compound and the specific base in the presence of oxygen.

A thermoplastic resin composition according to the present invention comprises: about 100 parts by weight of a thermoplastic resin comprising about 30 to about 60 wt % of a rubber-modified aromatic vinyl-based copolymer resin, about 30 to about 60 wt % of a polycarbonate resin, and about 5 to about 25 wt % of a polyester resin; about 0.1 to about 5 parts by weight of zinc oxide; about 0.1 to about 3 parts by weight of a phosphite compound comprising at least one type from among a phosphite compound represented by chemical formula 1 and a phosphite compound represented by chemical formula 2; and about 5 to about 30 parts by weight of a phosphorus-based flame retardant. The thermoplastic resin composition has excellent hydrolysis resistance, flame retardancy, and impact resistance, excellent balance of the foregoing physical properties, and the like.

A thermoplastic resin composition according to the present invention comprises: about 100 parts by weight of a thermoplastic resin comprising about 30 to about 60 wt % of a rubber-modified aromatic vinyl-based copolymer resin, about 30 to about 60 wt % of a polycarbonate resin, and about 5 to about 25 wt % of a polyester resin; about 0.1 to about 5 parts by weight of zinc oxide; about 0.1 to about 3 parts by weight of a phosphite compound comprising at least one type from among a phosphite compound represented by chemical formula 1 and a phosphite compound represented by chemical formula 2; and about 5 to about 30 parts by weight of a phosphorus-based flame retardant. The thermoplastic resin composition has excellent hydrolysis resistance, flame retardancy, and impact resistance, excellent balance of the foregoing physical properties, and the like.

The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness. The polycarbonate copolymer of the present invention contains a unit (A) represented by the following formula (1-1) or (1-2) and a unit (B) represented by the following formula (3); wherein in formula (1-1), R.sub.1 and R.sub.2 respectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group, or halogen atom, and Y represents a divalent organic residue comprised of the following formula (2); in formula (2), C.sub.m represents a cycloalkylene group, m represents an integer of 3 to 20, R.sub.3 represents a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms, and n represents an integer of 1 to 10; in formula (1-2), R.sub.1′ and R.sub.2′ respectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group or a halogen atom, and W represents a single bond, carbon atom, oxygen atom or sulfur atom; and in formula (3), R.sub.4, R.sub.5, R.sub.6 and R.sub.7 respectively and independently represent a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms: ##STR00001##

The present invention provides a polycarbonate copolymer having low specific gravity and high surface hardness. The polycarbonate copolymer of the present invention contains a unit (A) represented by the following formula (1-1) or (1-2) and a unit (B) represented by the following formula (3); wherein in formula (1-1), R.sub.1 and R.sub.2 respectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group, or halogen atom, and Y represents a divalent organic residue comprised of the following formula (2); in formula (2), C.sub.m represents a cycloalkylene group, m represents an integer of 3 to 20, R.sub.3 represents a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms, and n represents an integer of 1 to 10; in formula (1-2), R.sub.1′ and R.sub.2′ respectively and independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms that may contain an aromatic group or a halogen atom, and W represents a single bond, carbon atom, oxygen atom or sulfur atom; and in formula (3), R.sub.4, R.sub.5, R.sub.6 and R.sub.7 respectively and independently represent a hydrogen atom, halogen atom, alkyl group having 1 to 20 carbon atoms or cycloalkyl group having 3 to 20 carbon atoms: ##STR00001##

This disclosure pertains to novel polyvinyl chloride compositions containing polyvinyl chloride resins, polycarbonate resins and copolyester resins. More particularly, the present disclosure pertains to polyvinyl chloride compositions including admixtures of polycarbonates and high glass transition temperature (T.sub.g) copolyesters to increase the T.sub.g and the heat distortion temperature under load (HDTUL) of the polyvinyl chloride compositions.

This disclosure pertains to novel polyvinyl chloride compositions containing polyvinyl chloride resins, polycarbonate resins and copolyester resins. More particularly, the present disclosure pertains to polyvinyl chloride compositions including admixtures of polycarbonates and high glass transition temperature (T.sub.g) copolyesters to increase the T.sub.g and the heat distortion temperature under load (HDTUL) of the polyvinyl chloride compositions.

A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.