Thermoplastic resin composition, light reflector and method for producing molded article for light reflector

A kind of technology of light reflector and manufacturing method, applied in the field of thermoplastic resin composition

Active Publication Date: 2009-05-13
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the light-reflecting metal layer is directly formed on the molded article for light-reflectors without primer coating, the unevenness transferred to the molded article will affect the reflective properties of the light-reflector, and only the image clarity of the appearance can be obtained. poor light reflector

Method used

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  • Thermoplastic resin composition, light reflector and method for producing molded article for light reflector
  • Thermoplastic resin composition, light reflector and method for producing molded article for light reflector
  • Thermoplastic resin composition, light reflector and method for producing molded article for light reflector

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Experimental program
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Effect test

Embodiment

[0115] Hereinafter, the present invention will be described in more detail using examples and comparative examples, but the present invention is not limited thereto.

[0116] Evaluation method of surface roughness of metal mold

[0117] Using the non-contact three-dimensional measurement device NH-3 manufactured by Mitaka Koki, under the conditions of evaluation length 2mm, breaking value 0.8mm, and evaluation speed 0.3mm / sec, the surface of the metal mold was measured, and the arithmetic mean was obtained in accordance with JISB0601 standard Surface roughness Ra.

[0118] Evaluation method of resin

[0119] (1) Relative viscosity (ηsp / C)

[0120] Add 50ml of 1:1 (mass ratio) mixed solvent of phenol and tetrachloroethane (manufactured by Kanto Chemical Co., Ltd., trade name "PTM11") to 0.25g polybutylene terephthalate resin, Dissolve at 140°C for 10 to 30 minutes to obtain a solution. After adjusting its temperature in a constant temperature water tank at 25°C for 3 minute...

manufacture example 1

[0183] Production example 1 (acrylonitrile-styrene copolymer resin (x-1))

[0184] 115 parts by mass of distilled water, 1 part by mass of calcium (tri)phosphate, and 0.001 part by mass of Demol water-based dispersant P (manufactured by Kao Corporation) were put into a reaction tank and stirred. Then add 25 parts by mass of acrylonitrile, 75 parts by mass of styrene, 0.5 parts by mass of t-dodecyl mercaptan, 0.17 parts by mass of azobisisobutyronitrile, 0.003 parts by mass of ガフッツク GB-520 (Toho Kagaku Kogyo Co., Ltd.), after forming a suspension, the temperature was raised to 75° C., and kept for 240 minutes to complete the polymerization to obtain an acrylonitrile-styrene copolymer resin (x-1). The composition of the obtained (x-1) resin was acrylonitrile / styrene=34 / 66 (mass ratio).

manufacture example 2

[0185] Production example 2 (epoxy group-containing acrylonitrile-styrene copolymer resin (x-2))

[0186] 115 parts by mass of distilled water, 1 part by mass of calcium (tri)phosphate, and 0.001 part by mass of Demol water-based dispersant P (manufactured by Kao Corporation) were put into a reaction tank and stirred. Then add 23 parts by mass of acrylonitrile, 76.7 parts by mass of styrene, 0.3 parts by mass of glycidyl methacrylate, 0.5 parts by mass of t-dodecyl mercaptan, 0.17 parts by mass of azobisisobutyronitrile, 0.003 parts by mass of GAFAツクGB -520 (manufactured by Toho Chemical Industry Co., Ltd.), in the form of a suspension, the temperature was raised to 75° C., and kept for 240 minutes to complete polymerization to obtain epoxy group-containing acrylonitrile-styrene copolymer resin (x-2). The composition of the obtained (x-2) resin was acrylonitrile / styrene / glycidyl methacrylate=24.9 / 74.7 / 0.4 (mass ratio).

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Abstract

Disclosed are a thermoplastic resin composition for light reflectors which contains 2-45 parts by mass of an inorganic filler (B1) which is treated with a fatty acid based surface-finishing agent and has an average particle diameter of not more than 3 mum, per 100 parts by mass of a thermoplastic resin (A); a thermoplastic resin composition for light reflectors which contains 2-45 parts by mass of an inorganic filler (B2) with an average particle diameter of not more than 3 mum whose refractive index alpha is 1.61 <= alpha <= 2.5, per 100 parts by mass of a thermoplastic resin (A); and a thermoplastic resin composition for light reflectors which contains 0.01-3 parts by mass of a fatty acid glycerol triester and / or a fatty acid glycerol diester (C1) and 0.01-3 parts by mass of a fatty acid glycerol monoester (C2) per 100 parts by mass of a thermoplastic resin (A). Also disclosed are a formed article for light reflectors which is made of one of such thermoplastic resin compositions and a light reflector obtained by directly forming a light-reflecting metal layer on at least a part of the surface of such a formed article for light reflectors.

Description

[0001] This application is a divisional application of the following application: [0002] Filing date of original application (international filing date): August 25, 2004 [0003] National application number of the original application: 200480024095.5 (International application number: PCT / JP2004 / 012605) [0004] Title of Invention of Original Application: Thermoplastic Resin Composition for Light Reflector, Molded Article for Light Reflector, Method for Manufacturing Light Reflector and Molded Article for Light Reflector technical field [0005] The present invention relates to a thermoplastic resin composition used for light reflectors such as automobile lamp covers, reflectors, extensions, and lighting fixtures, and a light-reflecting metal layer directly formed on molded articles of the thermoplastic resin composition reflector. In addition, the present invention relates to a technique of polishing or chrome-plating the surface of an injection molding die used for manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D11/00F21V7/22
Inventor 白井安则植田治夫高木珠衣
Owner MITSUBISHI CHEM CORP
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