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Polycarbonate resin composition and molded article

A technology of polycarbonate resin and composition, which is applied in the field of polycarbonate resin composition, can solve the problems of reduced impact resistance, insufficient flame retardancy, difficulty in expressing the impact resistance of shell materials, etc., and achieve improved flame retardancy performance and impact resistance improvement

Active Publication Date: 2011-08-24
MITSUBISHI ENG PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the level of flame retardancy is still insufficient. Specifically, when the thickness is thin (0.8mm or less), flame retardancy of V-1 or higher specified in the UL94 standard cannot be achieved.
[0011] In addition, it is difficult for the above-mentioned composition to exhibit sufficient impact resistance required for housing materials and the like. In particular, in order to improve the The degree of freedom in product design, when forming a complex product shape with various corners and R parts for miniaturization, there is a problem that the impact resistance will be significantly reduced in the case of long-term heating

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～15、 comparative example 1～12

[0283] [Preparation of test piece]

[0284] The pellets obtained by the above-mentioned production method were dried at 120°C for 5 hours, and then injection-molded using a J50-EP injection molding machine manufactured by Nippon Steel Works at a cylinder temperature of 290°C and a mold temperature of 80°C. Formed into a UL test specimen with a length of 125 mm, a width of 13 mm, and a thickness of 0.8 mm, a flat test specimen (90 mm x 50 mm x 1-3 mm thick in two stages), and an ASTM tensile impact test specimen according to ASTM D1822 TypeS ( Thickness 3.2mm).

[0285] The pellets obtained by the above-mentioned production method were dried at 120°C for 5 hours, and then the cylinder temperature was 290°C and the mold temperature was 80°C using SYCAP M-2 manufactured by Sumitomo Heavy Industries, Ltd., with a mold clamping force of 75T. Injection molding was performed to form an ISO multi-functional test piece (3mm).

[0286] In addition, the pellets obtained by the above-me...

Embodiment 16～19、 comparative example 13

[0313] [Evaluation of Flame Retardancy]

[0314] The pellets obtained by the above-mentioned production method were dried at 120°C for 5 hours, and then injection-molded using an SE100DU injection molding machine manufactured by Sumitomo Heavy Industries Co., Ltd. at a cylinder temperature of 290°C and a mold temperature of 80°C. It was molded into a test piece for a UL test having a length of 125 mm, a width of 13 mm, and a thickness of 0.75 mm.

[0315] The obtained 0.75 mm test piece for UL test was subjected to humidity adjustment for 48 hours in a thermostatic chamber at a temperature of 23° C. and a humidity of 50%, and carried out in accordance with the UL94 test (combustion test of plastic materials for machine parts) in the same manner as above.

[0316] In addition, in Table 8, the result of the UL94 test is shown as "flame retardancy (0.75 mm)", and the total afterflame time (total burning time) of the five samples is shown as "Σt".

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Abstract

Disclosed are: a polycarbonate resin composition having excellent flame retardancy, excellent impact resistance and excellent surface appearance; and a molded article produced by molding the composition. The composition comprises 100 parts by mass of a polycarbonate resin (A), 0.001 to 2 parts by mass of an organic sulfonic acid metal salt (B), 0.001 to 1 part by mass of a fluoropolymer (C), 0.5 to 5 parts by mass of polyalkylsilsesquioxane particles (D) having an average particle diameter of 0.6 to 5 [mu]m, and 0.5 to 8 parts by mass of a graft copolymer (E) having a butadiene content of 50 to 95%.

Description

technical field [0001] The present invention relates to polycarbonate resin compositions. More specifically, it relates to a polycarbonate resin composition and a molded article obtained by molding the same, wherein the composition is excellent in flame retardancy, impact resistance, and surface appearance, and can maintain good resistance to heat even during high-temperature molding. Impact resistance shows good impact resistance even at portions having various corners R, and is also excellent in long-term thermal aging resistance. Background technique [0002] Polycarbonate resin is a resin excellent in heat resistance, mechanical properties, and electrical properties, and is widely used, for example, in automotive materials, electrical and electronic equipment materials, housing materials, and parts manufacturing materials in other industrial fields. In particular, the flame-retardant polycarbonate resin composition is suitable for use as components of OA (office automat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K5/42C08L83/04
CPCC08L27/12C08L51/04C08K5/42C08L83/04C08L69/00C08L2205/03C08L2666/02
Inventor 门田敏树
Owner MITSUBISHI ENG PLASTICS CORP
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