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Polyester resin composition, member for light reflectors containing same, and light reflectors

A technology of polyester resin and composition, which is applied in the field of polyester resin composition to achieve the effects of good surface smoothness, suppression of flow marks and low gas properties

Pending Publication Date: 2020-11-10
TOYOBO MC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since conventional techniques cannot solve this new problem, there is a demand for a thermoplastic polyester resin composition that has as low an injection speed as possible and is less prone to flow marks

Method used

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  • Polyester resin composition, member for light reflectors containing same, and light reflectors
  • Polyester resin composition, member for light reflectors containing same, and light reflectors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11、 comparative example 1～10

[0179] The mixed components mixed according to the combinations shown in Tables 1 and 2 were kneaded by a co-direction twin-screw extruder with the barrel temperature set at 260°C, and the obtained strands were cooled with water and pelletized. The obtained pellets were dried at 130° C. for 4 hours to obtain polyester resin compositions corresponding to each Example and each Comparative Example. With respect to these polyester resin compositions, each of the above-mentioned evaluation tests (4) to (10) was implemented.

[0180] Regarding the amount of the metal organic acid salt B, in the examples and comparative examples where the metal organic acid salt B was added at the time of melt polymerization (after the esterification reaction), compared with the amount at the time of addition, the polyester resin composition after melt kneading The residual amount (content) in the product decreased (it is considered that it may be distilled during the decompression step in the later ...

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Abstract

Provided is a polyester resin composition which has high heat resistance and low gas properties, is capable of significantly suppressing mold stains during continuous molding, and is capable of suppressing the occurrence of flow marks. The polyester resin composition comprises a polyester resin having excellent heat resistance and low gas properties; a polyester resin A containing 82-88 mass% of apolybutylene terephthalate resin and 12-18 mass% of a polyethylene terephthalate resin; a metal organic acid salt B of either or both of an alkali metal organic acid salt and an alkaline earth metalorganic acid salt; and 1-13 parts by mass of an inorganic filler C having an average particle diameter of 0.05-3 [mu] m per 100 parts by mass of the polyester resin A, wherein the polyester resin composition contains 0.00005-0.05 part by mass of one or both of alkali metal atoms and alkaline earth metal atoms per 100 parts by mass of the polyester resin A, and the content of linear oligomers suchas polybutylene terephthalate is 1,000 mg / kg or less.

Description

technical field [0001] The present invention relates to a polyester resin composition, a member for light reflectors containing the polyester resin composition, and a light reflector. Background technique [0002] Polyphenylene is widely used in applications such as automotive lamps and other lighting equipment components that require high-brightness appearance (smoothness) and uniform reflectivity, as well as components for light reflectors with a light reflection layer on the surface. Reinforced resins that add heat resistance to polyethylene terephthalate resin and inorganic fillers such as talc and mica are widely used, but in lamp parts called extensions, If the surface of such a reinforced resin is not primed and the aluminum vapor deposition process is not performed, a sufficient light-focusing reflection effect cannot be obtained. [0003] In recent years, polybutylene terephthalate resins or polycarbonate resins having good surface smoothness, which can omit such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/26C08K3/36C08K3/34C08K3/30C08K5/098G02B5/08
CPCC08L67/02G02B5/0808C08K2201/003C08K2003/265C08K2003/3045C08K3/26C08K5/098C08K5/103C08K3/36C08K3/346C08K3/30
Inventor 古川香织清水隆浩下拂卓也
Owner TOYOBO MC CORP
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