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Polycarbonate resin composition and optical molded article

A technology of polycarbonate resin and composition, which is applied in optics, optical components, light guides, etc., can solve the problems of not fully meeting the requirements of light guide plate materials and lower light transmittance, and achieve excellent thermal stability and weather resistance. The effect of high value and excellent light transmittance

Active Publication Date: 2017-09-26
SUMIKA POLYCARBONATE LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the polycarbonate resin compositions disclosed in Patent Documents 3 to 6 do not fully satisfy recent demands as materials for light guide plates (particularly light transmission even when molding at high temperature for thin-wall molding). rate will not be reduced etc.)

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～17 and comparative example 1～6

[0128] The above-mentioned raw materials are dropped into the drum according to the ratio shown in Table 1 and Table 2. After dry mixing for 10 minutes, use a twin-screw extruder (manufactured by Nippon Steel Works, TEX30α) to melt at the melting temperature Melt-kneading was carried out at 220° C. to obtain pellets of a polycarbonate resin composition. It should be noted that the particles obtained in Examples and Comparative Examples are approximately elliptical columns, the average length of each aggregate formed by 100 particles is about 5.1 mm to about 5.4 mm, and the average major diameter of the cross-sectional ellipse is about 4.1 mm. to about 4.3 mm, and the average value of the minor diameter is about 2.2 mm to about 2.3 mm.

[0129] Using the obtained pellets, each test piece for evaluation was prepared according to the following method, and used for evaluation. The results are shown in Table 1 and Table 2.

[0130] (Measuring method of melt viscosity)

[0131] T...

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Abstract

A polycarbonate resin composition obtained by blending 0.005-3.0 parts by weight of a melt viscosity adjuster (B) and 0.005-1.0 parts by weight of a phosphite-based compound (C) with respect to 100 parts by weight of a polycarbonate resin (A), the polycarbonate resin composition characterized in that the ratio [eta]1 / [eta]2 of the melt viscosity [eta]1 of the polycarbonate resin composition and the melt viscosity [eta]2 of the polycarbonate resin (A) satisfies the expression 0.45 <= [eta]1 / [eta]2 <= 0.95, where [eta] is the melt viscosity at a measurement temperature of 220 DEG C and a shear rate of 10 seconds-1.

Description

technical field [0001] The present invention relates to a polycarbonate resin composition and an optical molded article. Background technique [0002] Conventionally, polycarbonate resins have been used in molded products such as light guide plates, various lenses, and signs because of their excellent impact resistance, heat resistance, and transparency. [0003] For example, Patent Document 1 discloses an aromatic polycarbonate resin for a light guide plate in which a stabilizer and a release agent are mixed with an aromatic polycarbonate resin in which the ratio of the weight-average molecular weight to the number-average molecular weight is specified within a specific range. combination. [0004] Patent Document 2 discloses a polycarbonate resin composition for optical molded articles in which polystyrene and one type of phosphorus antioxidant are blended with a polycarbonate resin. [0005] In addition, for example, as disclosed in Patent Documents 3 to 6, various resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08K5/524C08L71/02
CPCC08K2201/014C08L69/00C08L2201/08C08L2201/10G02B1/04C08L71/02C08K5/526C08K5/527C08K5/524G02B6/0065
Inventor 榊阳一郎
Owner SUMIKA POLYCARBONATE LTD
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