A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

##STR00001##

A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

##STR00001##

Disclosed herein are compositions comprising from about 26 wt. % to about 89 wt. % of a polycarbonate polymer component, from about 0.5 wt. % to about 20 wt. % of phosphazene-based flame retardant, from about 0.01 wt. % to about 4 wt. % of a siloxane component, and from about 10 wt. % to about 50 wt. % of a filler component, wherein all weight percent are based on the total weight of the composition. The composition may exhibit a notched Izod impact strength of at least 150 J/m when tested in accordance with ASTM D256 at 23° C. and 5 ft-lb on a 3.2 mm bar specimen, a tensile elongation less than or equal to 2% when tested in accordance with D638 at 5 mm/min at break on a Type I bar specimen, and the composition achieves a p(FTP) of at least 0.85 for normal V0 of at 1.2 mm according to UL 94 (2019).

Disclosed herein are compositions comprising from about 26 wt. % to about 89 wt. % of a polycarbonate polymer component, from about 0.5 wt. % to about 20 wt. % of phosphazene-based flame retardant, from about 0.01 wt. % to about 4 wt. % of a siloxane component, and from about 10 wt. % to about 50 wt. % of a filler component, wherein all weight percent are based on the total weight of the composition. The composition may exhibit a notched Izod impact strength of at least 150 J/m when tested in accordance with ASTM D256 at 23° C. and 5 ft-lb on a 3.2 mm bar specimen, a tensile elongation less than or equal to 2% when tested in accordance with D638 at 5 mm/min at break on a Type I bar specimen, and the composition achieves a p(FTP) of at least 0.85 for normal V0 of at 1.2 mm according to UL 94 (2019).

The invention relates to carbonate-linked surface modifying macromolecules and admixtures thereof. The admixtures can be used in industrial and medical applications where enhanced surface properties are desirable (e.g., surface properties reducing or preventing biofouling, immobilization of biomolecules, or denaturation of certain biomolecules).

The disclosure concerns healable polycarbonate resins comprising at least about 5 mol % of disulfide units, articles comprising the healable polycarbonate resin, and methods of activating the healable polycarbonate resin by exposing the healable polycarbonate resin to heat or radiation.

A polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units.

##STR00001##

The invention relates to carbonate-linked surface modifying macromolecules and admixtures thereof. The admixtures can be used in industrial and medical applications where enhanced surface properties are desirable (e.g., surface properties reducing or preventing biofouling, immobilization of biomolecules, or denaturation of certain biomolecules).

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.

The present invention relates to a polycarbonate-based resin composition and a molded article thereof, and more specifically, to a polycarbonate-based resin composition exhibiting improved impact strength (impact resistance) and chemical resistance while including a glass fiber in a relatively small content, and a molded article formed therefrom.