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Flame retardant polycarbonate resin composition and light reflection member

A technology of polycarbonate resin and composition, which is applied in the field of light reflection plate and its peripheral parts, can solve the problem of deterioration of mechanical properties, decline, and inability to fully satisfy light reflectivity, light-shielding heat release, and dimensional stability of mechanical properties and other issues to achieve the effect of ensuring flame retardancy

Inactive Publication Date: 2009-11-25
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in Patent Document 1, since a polysiloxane-based compound based on silica is used as the component (c), flame retardancy can be ensured without containing a halogen-based compound, but there is a problem that , since the talc used for (e) platy inorganic filler is alkaline and the polycarbonate resin is hydrolyzed, the mechanical properties decrease with the molecular weight deterioration, and talc cannot be mixed at a high concentration
[0008] Therefore, in Patent Document 1, with respect to 100 parts by weight of (a) aromatic polycarbonate resin, (b) titanium oxide is limited to 3 to 30 parts by weight, and (c) platy inorganic filler is limited to 0.5 to 30 parts by weight. 15 parts by weight, the light reflectivity, light-shielding properties, heat release properties, mechanical properties (rigidity) and dimensional stability cannot be fully satisfied

Method used

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  • Flame retardant polycarbonate resin composition and light reflection member
  • Flame retardant polycarbonate resin composition and light reflection member
  • Flame retardant polycarbonate resin composition and light reflection member

Examples

Experimental program
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Effect test

Embodiment

[0158] Next, the present invention will be described in more detail through examples of the present invention, but the present invention is not limited to these examples.

[0159] The performance evaluation in each Example and a comparative example was performed by the following measurement method.

[0160] (1) Mechanical properties

[0161] Flexural modulus of elasticity (rigidity): based on ASTM D790 (measurement condition 23° C.).

[0162] Izod impact strength (impact resistance): based on ASTM D790 (measurement condition 23° C.).

[0163] (2) Light reflectivity Y

[0164] Each of the pellets obtained in Examples and Comparative Examples was dried with hot air at 120° C. for 5 hours, and then molded at a molding temperature of 300° C. and 80° C. A flat plate for reflectance measurement of 140 mm x 140 mm x 3.2 mm was produced at the mold temperature of .

[0165] The light reflectance was evaluated by the Y value with an LCM spectrophotometer MS2020 plus (manufactured b...

manufacture example 1

[0177] [Synthesis of polytetramethylene glycol-bis(4-hydroxybenzoate): average molecular weight of PTMG chain=2000]

[0178] Under nitrogen gas, 100 parts by mass of polytetramethylene glycol (PTMG, Mn=2000) and 16.7 parts by mass of methylparaben were heated at 210°C in the presence of 0.05 parts by mass of dibutyltin oxide, and methanol was distilled off. .

[0179] The reaction system was decompressed, and excess methyl p-hydroxybenzoate was distilled off. After dissolving the reaction product in methylene chloride, an 8% by mass aqueous sodium bicarbonate solution was added to the methylene chloride solution, and after vigorously mixing for 20 minutes, the methylene chloride phase was collected by centrifugation. The dichloromethane phase was concentrated under reduced pressure to yield polytetramethylene glycol-bis(4-hydroxybenzoate). As a result of quantification of p-hydroxybenzoic acid and methyl p-hydroxybenzoate by high performance liquid chromatography (HPLC), p-h...

manufacture example 2

[0182] [Synthesis of polytetramethylene glycol-bis(4-hydroxybenzoate): average molecular weight of PTMG chain=1000]

[0183] Except 100 mass parts of polytetramethylene glycol (PTMG, Mn=1000) and 33.4 mass parts of methylparabens, it carried out similarly to manufacture example 1.

[0184] Paraben is less than 10 mass ppm, and methyl paraben is 0.3 mass%.

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Abstract

Provided is a flame retardant polycarbonate resin composition, a light reflecting plate formed from the same and peripheral members thereof. The flame retardant polycarbonate resin composition is characterized by comprising (a) aromatic polycarbonate resin, (b) white pigment and (c) talcum treated by the alkali neutralizing treatment and the surface treating of a silane coupling agent, the sum of the (a), (b) and (c) is 100 mass parts, wherein the mass ratio of the (a) to (b) to (C) is (91 to 40) to (4 to 40) to (4 to 20). The formed product has no combustion inhibitor containing halogen or phosphor, with high light reflectivity and fire-retardancy, as well as favorable appearance and light index of reflection, shading performance, thermal conductivity (exothermicity ), mechanical characteristic(rigidity) and dimension stability.

Description

technical field [0001] The present invention relates to a polycarbonate resin composition and a light reflection member. More specifically, the present invention relates to polycarbonate having excellent heat resistance and flame retardancy, and excellent light reflectance, light-shielding properties, heat release properties, mechanical properties (rigidity), dimensional stability, and moldability of molded products. An ester resin composition, a light reflection plate formed by molding the composition, and its peripheral parts. Background technique [0002] In recent years, the use of liquid crystal displays (LCDs) has expanded to include notebook computers, monitors, and televisions. Especially recently, the competition for the development of larger, lighter, and thinner LCD TVs has been intense. At the same time, high-quality images are advancing, and the backlight of LCD lighting devices is not only required to be larger, thinner, and lighter. In addition, as a light so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K13/06G02B1/04
CPCC08F283/12C08G64/186C08K3/34C08K9/06C08L51/085C08L69/00C08L83/10G02B5/08
Inventor 川东宏至野村学河合直之堀尾庆彦
Owner IDEMITSU KOSAN CO LTD
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