# US 10,767,044 B2 · Ionizing radiation resistant polycarbonate resin composition and molded article containing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,044 B2 - Document ID: US10767044B2 - Status: Granted - Kind: B2 - Application number: 15/770,538 - Filed: 2016-10-12 - Published: 2019-02-28 - Granted: 2020-09-08 - Earliest claimed: 2015-10-27 - Assignees: Lotte Advanced Materials Co., Ltd. - Applicants: Lotte Advanced Materials Co., Ltd. - Inventors: Hyun Hye Jang; Chang Heon Lee; Woo Suk Chei; O Sung Kwon - Web page: https://patentgrep.com/patent/US10767044B2 ## CPC - C08L 69/00: Compositions of polycarbonates; Compositions of derivatives of polycarbonates - C08L 2201/08: Stabilised against heat, light or radiation or oxydation - C08L 2203/02: for biomedical use - C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure - C08L 2205/03: containing three or more polymers in a blend - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract A polycarbonate resin composition of the present invention comprises: a polycarbonate resin; and a polycarbonate polyol comprising a terminal hydroxyl group and a repeat unit represented by Formula 1. The polycarbonate resin composition exhibits good properties in terms of color, impact resistance, stiffness and the like even after irradiation with ionizing radiation. ## Claims ### Claim 1 A polycarbonate resin composition, comprising: a polycarbonate resin; and about 0.1 parts by weight to 0.375 parts by weight relative to about 100 parts by weight of the polycarbonate resin of a polycarbonate polyol having a number average molecular weight of about 1,000 g/mol to about 5,000 g/mol and containing terminal hydroxyl groups; a repeat unit represented by Formula 1a; and a repeat unit represented by Formula 1b: where R2 is a C1 to C4 linear alkylene group or a C3 to C4 branched alkylene group; and where R3 is a C5 to C15 linear alkylene group, a C5 to C15 branched alkylene group, or a C5 to C15 cyclic alkylene group. ### Claim 2 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the repeat unit represented by Formula 1a is present in an amount of about 1 mol % to about 99 mol % based on the total mole number of the repeat units represented by Formula 1a and Formula 1b, respectively, and the repeat unit represented by Formula 1b is present in an amount of about 1 mol % to about 99 mol % based on the total mole number of the repeat units represented by Formula 1a and Formula 1b, respectively. ### Claim 3 (depends on 1) The polycarbonate resin composition according to claim 1, further comprising: at least one of a polyalkylene glycol; an epoxy ester compound represented by Formula 2; and an anthraquinone colorant: where R4 and R6 are each independently a C1 to C10 hydrocarbon group, R5 and R7 are each independently a hydrogen atom or a C1 to C10 hydrocarbon group, m and n are 0 or 1, and m+n is 1 or 2, wherein R4 and R5 and/or R6 and R7 are optionally connected to form a ring. ### Claim 4 (depends on 3) The polycarbonate resin composition according to claim 3, wherein, relative to about 100 parts by weight of the polycarbonate resin, the polyalkylene glycol is present in an amount of about 0.1 parts by weight to about 1.5 parts by weight, the epoxy ester compound is present in an amount of about 0.001 parts by weight to about 3 parts by weight, and the anthraquinone colorant is present in an amount of about 0.0001 parts by weight to about 0.002 parts by weight. ### Claim 5 (depends on 3) The polycarbonate resin composition according to claim 3, wherein the anthraquinone colorant comprises a red anthraquinone colorant and a violet anthraquinone colorant in a weight ratio of about 1:1 to about 1:2. ### Claim 6 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin composition has a yellow index (YI) of about −10 to about 10, as measured on an about 3.2 mm thick specimen in accordance with ASTM D1925 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days. ### Claim 7 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin composition has a yellow index difference ΔYI of about 30 or less, as measured on an about 3.2 mm thick specimen and calculated according to Equation 1: ΔYI=YI1−YI0 [Equation 1] where YI0 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 before irradiation with γ-rays, and YI1 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days. ### Claim 8 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin composition has a notched Izod impact strength of about 90 kgf·cm/cm or more, as measured on a ⅛″ thick specimen in accordance with ASTM D256 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days. ### Claim 9 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin composition has a tensile strength of about 620 MPa to about 700 MPa, as measured on a 3.2 mm thick specimen in accordance with ASTM D638 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days, and a flexural strength of about 910 MPa to about 960 MPa, as measured on a 3.2 mm thick specimen in accordance with ASTM D790 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days. ### Claim 10 (depends on 1) A molded article formed of the polycarbonate resin composition according to claim 1. ### Claim 11 (depends on 10) The molded article according to claim 10, wherein the molded article is an ionizing radiation-resistant medical appliance. ### Claim 12 (depends on 1) The polycarbonate resin composition according to claim 1, wherein the polycarbonate resin composition has a yellow index (YI) of about −10 to about 10, as measured on an about 3.2 mm thick specimen in accordance with ASTM D1925 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days; a yellow index difference ΔYI of about 30 or less, as measured on an about 3.2 mm thick specimen and calculated according to Equation 1: ΔYI=YI1−YI0 [Equation 1] where YI0 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 before irradiation with γ-rays, and YI1 is a yellow index (YI) of the specimen, as measured in accordance with ASTM D1925 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days; and a notched Izod impact strength of about 90 kgf·cm/cm or more, as measured on a ⅛″ thick specimen in accordance with ASTM D256 after irradiation with γ-rays at 25 kGy and leaving the specimen for 7 days. ### Claim 13 (depends on 1) The polycarbonate resin composition according to claim 1, wherein R2 of Formula 1b is an ethylene group and R3 of Formula 1c is a hexylene group. ### Claim 14 (depends on 1) The polycarbonate resin composition according to claim 1, further comprising a polyalkylene glycol and an anthraquinone colorant. ### Claim 15 (depends on 14) The polycarbonate resin composition according to claim 14, wherein the anthraquinone colorant comprises a red anthraquinone colorant and a violet anthraquinone colorant in a weight ratio of about 1:1 to about 1:2. ### Claim 16 (depends on 15) The polycarbonate resin composition according to claim 15, further comprising an epoxy ester compound.