Aromatic polycarbonate resin composition with light diffusibility

A technology of polycarbonate resin and resin composition, which can be used in lighting and heating equipment, diffusion elements, lighting devices, etc., and can solve problems such as insufficient thermal stability

Active Publication Date: 2009-09-09
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still difficult to say that the occurrence of silver spots and brown spots can be sufficiently suppressed in molding at a high temperature exceeding 300°C. Only the heat stabilization treatment is performed on the crosslinked acrylic particles themselves, and the heat stability of the resin composition as a whole is considered. still not enough

Method used

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  • Aromatic polycarbonate resin composition with light diffusibility
  • Aromatic polycarbonate resin composition with light diffusibility
  • Aromatic polycarbonate resin composition with light diffusibility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0155] Each characteristic value was measured by the following method.

[0156] (1) 5% weight reduction temperature

[0157] Based on JIS K7120, the measurement was performed using a TGA measuring device in a nitrogen atmosphere in a temperature range from 23° C. to 900° C. and under measurement conditions of a temperature increase rate of 20° C. / min. In the weight reduction process, when a weight reduction of 5% was confirmed, the temperature at that time was defined as the 5% weight reduction temperature.

[0158] (2) Total light transmittance

[0159] At a cylinder temperature of 280°C and the conditions described later, a test piece with a side length of 50 mm and a thickness of 2 mm was prepared, and the haze meter HR-100 manufactured by Murakami Color Technology Research Institute was used to measure the thickness in the thickness direction based on ASTMD1003. Transmittance.

[0160] (3) Dispersion

[0161] Under the cylinder temperature of 280° C. and the conditions...

manufacture example

[0180] (Preparation of PMMA-1)

[0181] Into a polymerizer equipped with a stirrer and a thermometer, 500 parts by weight of deionized water in which 0.1 part by weight of sodium lauryl sulfate was dissolved was charged, and 50 parts by weight of tertiary calcium phosphate was dispersed therein. Into it again, put in the polymerizable monomer component that has prepared in advance 90 weight parts of methyl methacrylate, trimethylolpropane triacrylate 10 weight parts and dissolve 0.5 weight part of benzoyl peroxide, even A mixture of 0.5 parts by weight of nitrogen bisisobutyronitrile and 0.5 parts by weight of Adecastab PEP-24G (manufactured by Asahi Denka Co., Ltd.) as a phosphite antioxidant was stirred with a T.K homomixer at 10,000 rpm for 10 minutes to prepare a liquid After the droplet diameter became about 3 μm, 3.0 parts by weight of Adecastab PEP-24G (manufactured by Asahi Denka Co., Ltd.) was added as an antioxidant. Next, the polymerizer was heated to 65° C., and s...

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Abstract

The objective of the present invention is to provide excellent thermostable aromatic polycarbonate resin composition with high light diffusibility and high light permeation rate simultaneously, without generation of silver plaque and resin speckle. The resin composition according to the invention has light diffusibility, relative to 100 parts by weight of aromatic polycarbonate resin (A ingredient), containing 0.01-3.0 parts by weight of crosslinking (methyl) acrylic polymer particles (B ingredient), which are not compatible with the aromatic polycarbonate resin, and reduces 5% of weight detected by calorimetry device when temperature is above 300 DEG C.

Description

technical field [0001] The present invention relates to a light-diffusing aromatic polycarbonate resin composition, in more detail, to a composition capable of achieving high light diffusivity and high light transmittance at the same time, and having the excellent properties of not producing silver spots or resin brown spots. Thermally stable light-diffusing aromatic polycarbonate resin composition. In addition, it relates to injection molding (extrusion) molding, especially suitable for a maximum projected area of ​​500 to 50000 cm 2 A light-diffusing aromatic polycarbonate resin composition for large injection molding (extrusion) molding. Background technique [0002] Conventionally, it has been widely used in aromatic polycarbonate resin, acrylic resin, benzene A material in which an organic or inorganic light-diffusing agent is dispersed on transparent resins such as vinyl resins and vinyl chloride resins. Among such transparent resins, aromatic polycarbonate resins a...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L33/02C08K5/526C08K5/138C08K5/36F21V3/04G02B5/02
Inventor 古屋和彦池松龙介
Owner TEIJIN LTD
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