The present invention relates to a flame-retardant polycarbonate composition comprising the following components, relative to the total weight of the composition: A) 40-60 wt. % of at least one aromatic polycarbonate, B) 30-50 wt. % of at least one polysiloxane-polycarbonate condensate, C) 0.5-5 wt. % of at least one cyclic phosphazene, D) 1-5 wt. % of at least one silicone-acrylate rubber based impact modifier, E) 0.3-3 wt % of aluminium hydroxide oxide, F) 0.1-1 wt. % of at least one anti-dripping agent, and G) 0.1-1 wt. % of at least one UV absorber.

The present invention also relates to a shaped article produced from the composition. The polycarbonate composition according to the present invention has a good combination of low-temperature impact performance, flame-retardancy, hydrolytic stability, anti-UV performance, and heat resistance.

The present invention relates to a method for producing polyether carbonates containing alkoxysilyl groups in which (a) an unsaturated polyether carbonate polyol is reacted with (b) an alkoxysilane compound of formula (II) Si(X).sub.m(R1).sub.n(R2).sub.o (II), where X=H, Y—S—H and Y=C1-C22 alkylene, C6-C14 arylene, C7-C14 aralkylene, C7-C14 alkylarylene; R1=C1-C8 alkoxy, C7-C20-aralkoxy, C6-C14 aroxy, C7-C20 alkylaroxy; R2=C1-C22 alkyl, C6-C14 aryl, C7-C14 aralkyl, C7-C14 alkylaryl, and m and n represent, independently of one another, an integer ≧1, o is zero or an integer ≧1 and m+n+o=4. The invention further relates to the production of a polyurethane polymer using such a polyether carbonate, a cross-linked, siloxane group containing polymer and a molded part containing or consisting of said cross-linked polymer.

Provided is a method of producing a polycarbonate-polyorganosiloxane copolymer, including a step (a) of producing a polycarbonate oligomer with an alkaline aqueous solution of a dihydric phenol, phosgene, and an organic solvent, the method further including a step of setting a content of a polycarbonate-polyorganosiloxane copolymer in the organic solvent to be introduced into the step (a) to less than 850 ppm by mass.

Crosslinkable polycarbonate resins having improved properties are disclosed. The crosslinkable polycarbonate resins are formed from a reaction of at least a benzophenone, a first dihydroxy chain extender, and a carbonate precursor, and may include a second dihydroxy chain extender as well.

Polysiloxane-polycarbonates and improved methods for preparing the polysiloxane-polycarbonates are provided. Also provided are blend compositions including the polysiloxane-polycarbonates. The blend compositions can include one or more additional polymers. The blend compositions can include one or more additives. The blend compositions can be used to prepare articles of manufacture.

The present invention relates to copolycarbonates and a composition comprising the same. The copolycarbonate according to the present invention has a structure in which specific siloxane compounds are introduced in the main chain of polycarbonate and thus exhibits the effects of improving impact strength at room temperature, impact strength at low-temperature, and melt index.

Disclosed herein are compositions, comprising linear polydiorganosiloxanes having enhanced reactivity and their use to prepare polydiorganosiloxane-polyorgano block copolymers.

Provided is a polycarbonate resin powder, including a polycarbonate-polyorganosiloxane copolymer, in which an amount of particles each having a particle diameter of 300 μm or less in an entirety of the powder is 60 mass % or less.

A polycarbonate composition includes: a continuous polycarbonate phase; discontinuous first domains distributed in the continuous phase, and comprising a core-shell silicone-(meth)acrylate impact modifier comprising a silicone elastomer core and a (meth)acrylate copolymer shell, wherein the first domains have an aspect ratio of at least 1.7, preferably at least 1.8; and discontinuous second domains distributed in the continuous phase, and comprising an alkenyl aromatic-olefin block copolymer impact modifier, wherein the second domains have an aspect ratio of at least 3, preferably at least 4, and a domain size of 6400 square nanometers or less, more preferably 5700 square nanometers or less. Optionally, the polycarbonate composition includes: a polycarbonate; a brominated polycarbonate different from the polycarbonate; a poly(carbonate-siloxane) comprising 30 to 70 weight percent of siloxane blocks; a core-shell silicone-(meth)acrylate impact modifier comprising a silicone elastomer core and an (meth)acrylate copolymer shell; and an alkenyl aromatic-olefin block copolymer impact modifier.

Provided is a polycarbonate-based resin composition, including: 50 mass % or more to 99 mass % or less of a polycarbonate-based resin (S) containing 0.1 mass % or more to 100 mass % or less of a polycarbonate-polyorganosiloxane copolymer (A), which contains a polycarbonate block (A-1) formed of a specific repeating unit and a polyorganosiloxane block (A-2) containing a specific repeating unit, and 0 mass % or more to 99.9 mass % or less of an aromatic polycarbonate-based resin (B) except the polycarbonate-polyorganosiloxane copolymer (A); 1 mass % or more to 50 mass % or less of a polyester-based resin (C); and 0.001 part by mass or more to 1 part by mass or less of an amide compound (D) with respect to 100 parts by mass of a total amount of the polycarbonate-based resin (S) and the polyester-based resin (C).