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Polycarbonate resin combination

A technology of polycarbonate resin and resin composition, which is applied in the direction of optical recording media, etc., and can solve the problems of difficult optical disc substrate materials, high crystallinity, opacity, etc.

Inactive Publication Date: 2008-10-15
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] PBS is highly crystalline and opaque, and is a soft material with a deformation temperature under load (0.45MPa) of about 70°C under the load (0.45MPa) specified in ISO. Therefore, it is difficult to use it alone as an optical disc substrate material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] 10.0 g of polybutylene succinate ( ピオノレレ 1020, manufactured by Showa Polymer Co., Ltd.), was dry-blended and mixed uniformly. Next, the composition was melt-kneaded while degassing at a cylinder temperature of 280° C. using a vented twin-screw extruder (KTX-46, manufactured by Kobe Steel Co., Ltd.), to obtain resin composition pellets. Shaped tablets are produced from the granules. The glass transition temperature, deformation temperature under load, and water absorption are listed in Table 1.

[0126] Next, after drying the pellets at 120° C. for 5 hours, using an injection molding machine (M-35B-D-DM, manufactured by Meiji Seisakusho Co., Ltd.), at the cylinder temperature and mold temperature listed in Table 1, An optical disc substrate with a diameter of 120 mmФ and a thickness of 0.6 mm and an optical disc substrate with a diameter of 120 mmФ and a thickness of 1.2 mm are injection molded. The obtained optical disc substrates were cut out into dimensions of 50 mm...

Embodiment 2

[0130] 30.0 g of polybutylene succinate ( A molded sheet was produced from the resin composition pellets in the same manner as in Example 1, except for Pionore 1020 (manufactured by Showa Polymer Co., Ltd.). And determine its glass transition temperature, load deformation temperature, water absorption. Furthermore, a substrate was produced by the same method as in Example 1, and light transmittance was measured. In addition, by the same method as in Example 1, a DVD-ROM disc was obtained.

[0131] Using this optical disc, measurement of radial warpage, evaluation of signal characteristics, and reproduction by a player were carried out. In addition, it was left for 96 hours in an environment with a temperature of 70°C and a humidity of 50%RH specified in the JIS standard (JIS X 6241; 1997 and JIS X 6245; 1999), and then at a temperature of 23°C and a humidity of 50%RH After leaving it in a normal temperature and humidity environment for 24 hours, measurement of radial warpag...

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Abstract

The purpose of the invention is providing a polycarbonate resin composite. The transparence, high thermal stability and anti-hydroscopicity of the resin composite are great; the resin composite is the new oil chemical resin with low environment load and reproducible resource. The polycarbonate resin composite contains poly butane diacid acid poly butanediol ester with 1-3 weight% relative to the polycarbonate resin with 100 weight parts.

Description

technical field [0001] The invention relates to a resin composition containing polycarbonate resin and polybutylene succinate. Background technique [0002] Polycarbonate resin (hereinafter, sometimes referred to as "PC-A") obtained by reacting 2,2-bis(4-hydroxyphenyl)propane (hereinafter, sometimes referred to as "bisphenol A") with a carbonate precursor ), has excellent transparency, heat resistance, mechanical properties, and dimensional stability, and is widely used as one of engineering plastics in various fields. Especially in the field of optical discs, its transparency and heat resistance are used as substrates for recording media. In terms of weight, more than 98% of CDs and more than 95% of HD-DVDs are made of polycarbonate resin substrates. . [0003] In recent years, from the viewpoint of protecting the global environment, there has been a growing tendency to suppress oil consumption. In the field of plastics, substitutes for petroleum products are also being ...

Claims

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Application Information

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IPC IPC(8): C08L69/00G11B7/24C08L67/02G11B7/2534
Inventor 高桥平祐常守秀幸
Owner TEIJIN KASEK KK
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