13 results about "Polysiloxane polycarbonate copolymer" patented technology

A polycarbonate resin composition of the present invention comprises: about 100 parts by weight of a base resin comprising about 10-90 wt% of a polycarbonate resin and about 10-90 wt% of a polysiloxane-polycarbonate copolymer resin; about 1-10 parts by weight of a diphenylamine-based compound; and about 0.1-2 parts by weight of a polydimethylsiloxane having a terminal reactive group and having a kinematic viscosity, measured at 40 °C according to ASTM D445, of about 5-200 cSt. The polycarbonate resin composition has excellent transparency, chemical resistance, fluidity, thermal stability, balance of these physical properties, and the like.

The present invention relates to a thermoplastic resin composition and a molded article manufactured therefrom, the thermoplastic resin composition including: (A) a polycarbonate resin; (B) a polysiloxane-polycarbonate copolymer resin; (C) a siloxane modified polyester; (D) a syndiotactic polystyrene; and (E) a benzotriazole-based ultraviolet (UV) stabilizer.

Embodiments of the present disclosure are directed to polycarbonate-based compositions comprising, based on a total weight of the polycarbonate-based composition, 15 wt % to 35 wt % of polycarbonate, 50 wt % to 75 wt % of polysiloxane-polycarbonate copolymer, 7 wt % to 15 wt % of a flame retardant, and greater than 0.5 wt % to 2 wt % of an impact modifier.

Disclosed is a polycarbonate composition which exhibits a high level of flame retardancy and excellent physical properties, without the need for the presence of a polyfluoroalkyl substance (PFAS) or an anti-drop agent. Disclosed is a polycarbonate composition which exhibits excellent flame retardant properties without using a halogen compound. Methods of making such compositions are disclosed. Structures prepared from the disclosed compositions are disclosed. The composition comprises: a) one or more branched polycarbonates; b) one or more phosphazene-based flame retardants; and c) one or more polysiloxane impact modifiers or one or more polysiloxane polycarbonate copolymers.

The polycarbonate resin composition of the present invention comprises: about 100 parts by weight of a base resin comprising about 95 wt% or less of a polycarbonate resin and about 5 wt% or more of a polysiloxane-polycarbonate copolymer resin; about 1 part by weight to about 15 parts by weight of a phosphazene compound; and from about 0.1 parts by weight to about 2 parts by weight of a polydimethylsiloxane having a terminal reactive group and having a dynamic viscosity rate of from about 5 cSt to about 200 cSt as measured at 40 DEG C according to ASTM D445. The polycarbonate resin composition has excellent transparency, flame retardancy (in a film), chemical resistance, impact resistance, and a balance of these characteristics.

The present invention relates to the technical field of polycarbonate, and discloses a preparation method of a wear-resistant material for a mobile phone back cover. 100 parts by weight of polycarbonate, 3-15 parts by weight of a polysiloxane-polycarbonate copolymer, and 10-20 parts by weight of polysiloxane-modified glass fiber are melt-extruded and granulated to obtain a wear-resistant material for a mobile phone back cover. The polysiloxane-polycarbonate of the present invention contains flexible polysiloxane molecular chains and a unique hyperbranched structure, has a good toughening effect on polycarbonate, and can play a role in compatibilizing the polysiloxane-modified glass fiber and polycarbonate. Under the synergistic effect, the tensile properties and bending properties of the polycarbonate material are improved, the mass loss rate is reduced, and the wear resistance is improved.

The present invention relates to a fluorine-containing polysiloxane, a polysiloxane-polycarbonate copolymer comprising the same as a repeating unit, and a method for manufacturing the copolymer. More specifically, the invention relates to a polysiloxane of a specific structure having a siloxane unit having a terminal containing an optionally substituted hydroxyphenyl group and a fluorine-containing side chain, and a polysiloxane-polycarbonate copolymer comprising the polysiloxane and a polycarbonate block as repeating units, which has excellent chemical resistance, excellent flame retardancy, and excellent weather resistance, and a method for manufacturing the same.

The present invention relates to a thermoplastic resin composition having excellent hardness, discoloration resistance and impact resistance, and a molded article comprising the same. More specifically, the present invention relates to a thermoplastic resin composition and a molded article comprising the same, the thermoplastic resin composition comprises a polycarbonate resin, a polysiloxane-polycarbonate copolymer, a modified acrylic copolymer, an alumina-based inorganic filler, a triazinyl ultraviolet stabilizer, and a core-shell type acrylic impact modifier at a specific content ratio, and has excellent scratch resistance. Meanwhile, excellent discoloration resistance and impact strength are also realized.

A polycarbonate resin composition of the present invention comprises: about 100 parts by weight of a base resin containing about 45 to about 85 wt% of a polycarbonate resin and about 15 to about 55 wt% of a polysiloxane-polycarbonate copolymer resin; about 1.5 to about 4 parts by weight of a phosphazene compound; about 0.3 to about 1.5 parts by weight of siloxane-modified polyester; about 0.3 to about 3 parts by weight of syndiotactic polystyrene; and about 0.3 to about 1.5 parts by weight of a benzotriazole-based ultraviolet stabilizer. The polycarbonate resin composition exhibits excellent scratch resistance, impact resistance, flame retardancy, weather resistance, colorability, and the like.

The present invention relates to a thermoplastic resin composition and molded articles containing the same, which have excellent hardness, discoloration resistance, and impact resistance. More specifically, the present invention relates to a thermoplastic resin composition and molded articles containing the same, which contain polycarbonate resin, polysiloxane-polycarbonate copolymer, modified acrylic copolymer, alumina-based inorganic filler, triazine-based ultraviolet stabilizer, and core-shell type acrylic impact modifier in specific content ratios, and which have excellent scratch resistance, as well as excellent discoloration resistance and impact strength.

The present invention relates to a polysiloxane-polycarbonate copolymer using a hydroxyl terminated polysiloxane mixture, and a method for producing same, and more specifically, to: a polysiloxane-polycarbonate copolymer which includes hydroxy-terminated polysiloxanes of chemical formulae 1 and 2 in a specific weight ratio as repeating units, and thus exhibits excellent transmittance and low-temperature impact strength compared to the case of using either of the hydroxy-terminated polysiloxanes by itself, and in which the overall production yield of the raw material polysiloxane is improved, such that the polysiloxane-polycarbonate copolymer is excellent in terms of economics; and a method for producing same.

A polycarbonate resin composition according to the present invention comprises: about 100 parts by weight of a base resin including about 1 to about 96 wt% of a polycarbonate resin, about 2 to about 90 wt% of a recycled polycarbonate resin including polymethyl methacrylate, and about 2 to about 97 wt% of a polysiloxane-polycarbonate copolymer resin; about 1 to about 15 parts by weight of a phosphazene compound; about 0.3 to about 3 parts by weight of a phenylmethylsiloxane compound; and about 0.1 to about 2 parts by weight of a polydimethylsiloxane having a terminal reactive group and having a kinematic viscosity of about 5 to about 200 cSt as measured at 40°C according to ASTM D445. The polycarbonate resin composition has excellent environmental friendliness, (thin film) flame retardancy, chemical resistance, and impact resistance, and an excellent balance of said physical properties.