Thermoplastic polyester resin composition and light reflector using same
A technology of resin composition and thermoplastic polyester, which is applied in the field of thermoplastic polyester resin composition, can solve the problems of appearance influence, heavy weight of molded products, and large proportion of fillers, etc., and achieve light mirror surface, excellent low fogging, and Effect of suppressing mold contamination
Active Publication Date: 2018-04-17
TOYOBO CO LTD
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Problems solved by technology
For example, in Patent Document 4, it is proposed to mix about 10% by mass of calcined kaolin, barium sulfate, titanium dioxide and other fine powdered spherical inorganic fillers, but the appearance may be affected by aggregation between the fillers, or because barium sulfate or titanium dioxide, etc. The specific gravity of the filler is large, so the weight of the molded product may become too heavy
Method used
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Embodiment 1～14、 comparative example 1～9
[0161] To the compounding components shown in Table 1 and Table 2, further add 0.3 parts by mass of Poem TR-FB as a release agent, 0.2 parts by mass of Irganox 1010 as an antioxidant, and set the cylinder temperature to 260°C The co-rotating twin-screw extruder was used for melt kneading, and the obtained strands were cooled with water and pelletized. The obtained pellets were dried at 130° C. for 4 hours, and used in the above-mentioned respective evaluation tests. The results are shown in Table 1 and Table 2.
[0162] [Table 1]
[0163]
[0164] [Table 2]
[0165]
[0166] The thermoplastic polyester resin compositions of Examples not only suppress the aggregation of calcium carbonate fine particles and are excellent in the surface appearance of molded articles, but also exhibit low fogging properties and suppress mold contamination.
[0167] On the other hand, in the thermoplastic polyester resin composition of Comparative Example, the surface smoothness, mold cont...
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Abstract
The present invention is a thermoplastic polyester resin composition which is suitable for forming a light-reflecting surface of a light reflector, can provide a molded article having excellent surface smoothness and low fogging properties, and can also suppress mold staining during continuous molding. This thermoplastic polyester resin composition contains 100-50 parts by mass of a poly(butyleneterephthalate) resin (A) and 0-50 parts by mass of a poly(ethylene terephthalate) resin (B), and contains 1-20 parts by mass of a surface treated calcium carbonate (C) having an average particle diameter of 0.05-2 mum and 0.05-3 parts by mass of a polyfunctional glycidyl group-containing styrene-based polymer (D) relative to a total of 100 parts by mass of the polyester resins contained in the resin composition.
Description
technical field [0001] The present invention relates to a thermoplastic polyester resin composition, which is used in components for light reflectors provided with a light reflective layer on the surface, for example, in components constituting automobile lamps or lighting equipment, and optical components containing the resin composition. A light reflector in which a light reflective metal layer is directly formed on a part or all of the element for reflectors and the element for light reflectors. Background technique [0002] It is used in extension parts of automobile lamps, reflective bowls, etc., or light reflectors such as lighting equipment, and its performance requires a high-brightness appearance, uniform reflectivity, and heat resistance against heat generated by light from the light source. Conventionally, such a product has used a thermosetting resin bulk molding compound (hereinafter abbreviated as BMC) having a metal thin film on its surface. [0003] BMC is e...
Claims
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IPC IPC(8): C08L67/02C08K3/26C08K9/00C08K13/06C08L25/08G02B5/08
CPCB29L2011/0083C08L25/14C08J3/203C08J2425/14C08L67/02B29D11/0074C08J2367/02C08J2467/02G02B1/04C08K2003/265C08L67/00C08K9/02C08K9/04G02B5/08B29K2067/006C08J3/201C08J2425/06C08L2205/025C08L2205/03G02B5/0866
Inventor 安井淳一堀口悟下拂卓也
Owner TOYOBO CO LTD