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Polycarbonate resin composition and molded article thereof

A technology of polycarbonate resin and composition, which is applied in the direction of instruments, optical components, optics, etc., can solve the problems of difficult yellowing of molded products, no records, etc., and achieve the effect of preventing poor appearance

Active Publication Date: 2021-03-23
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this way, the above-mentioned Patent Documents 1 and 2 do not describe polycarbonate resins that do not reduce mold release properties when manufacturing optical components, prevent yellowing of molded products, and prevent occurrence of poor appearance of molded products such as silver streaks. Carbonate resin composition and molded article thereof

Method used

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  • Polycarbonate resin composition and molded article thereof
  • Polycarbonate resin composition and molded article thereof
  • Polycarbonate resin composition and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9 and comparative example 1～5

[0167] Using the compounding amounts shown in Table 1, using components (A) to (E), using a twin-screw extruder with a vent (manufactured by Toshiba Machine Co., Ltd., "TEM-37SS", L / D=40.5) Pellets were obtained by melt-kneading at a cylinder temperature of 320°C. When melting and kneading with a twin-screw extruder with a vent, add ion-exchanged water (conductivity: 1 μS / m or less), the degree of vacuum at the outlet of the exhaust port was reduced to -720 mmHg, and melt kneading was performed to obtain pellets. Table 1 shows the evaluation results of the pellets formed from the obtained polycarbonate resin composition and the evaluation results of the test pieces injection-molded using the pellets. In addition, the silicone compound of the (B) component used in the Example and the comparative example used the silicone compound "trade name: KR-511" manufactured by Shin-Etsu Chemical Co., Ltd. of the same grade, although the same Five batches of silicone compounds "KR-511(a...

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Abstract

A polycarbonate resin composition (1) comprising (B) 0.01 to 0.25 parts by mass of a silicone compound and (C) an aliphatic compound having 12 to 22 carbon atoms with respect to 100 parts by mass of the (A) polycarbonate resin. 0.015 to 0.25 parts by mass of ester of carboxylic acid and glycerin, the sodium content in the above-mentioned component (B) is 15 mass ppm or less, or the polycarbonate resin composition (2), wherein, with respect to 100 parts by mass of (A), contains (B) 0.01 to 0.25 parts by mass and (C) 0.015 to 0.25 parts by mass, the modification rate of component (C) is 30% or less; and the molded polycarbonate resin composition (1) or (2) obtained Taste.

Description

technical field [0001] The present invention relates to polycarbonate resin compositions and molded articles thereof. More specifically, it relates to a polycarbonate resin composition and a molded article thereof, which are difficult to form even when molded at a high temperature or under severe molding temperature conditions with a long residence time. Yellowing occurs without reducing mold release properties, and can prevent appearance defects of molded products such as silver streaks. Background technique [0002] Polycarbonate resin has excellent characteristics such as transparency, heat resistance, and mechanical properties, and is used in housings of OA and home appliances, components in the electrical and electronic fields, optical materials such as various optical disc substrates and lenses, garage roofing materials, In a wide range of applications such as various building materials, its production volume and applications have been expanding. Under the influence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08K5/103C08L33/06C08L83/04
CPCC08L33/06C08G77/18C08G77/20C08L69/00C08K5/103C08L83/04C08G64/04G02B1/04C08L2201/08C08L2205/06G02B1/045
Inventor 渡边信广
Owner IDEMITSU KOSAN CO LTD
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