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Low haze, high heat resistant and base coat-free PBT composite material and preparation method thereof

A composite material, high heat resistance technology, applied in the field of modified materials and materials, can solve the problem of inability to meet the high heat resistance requirements of automotive lamp decoration parts, and achieve the improvement of surface fogging and flooding phenomenon, good surface finish, Solve the effect of surface fogging

Inactive Publication Date: 2017-06-20
SICHUAN COREMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low haze and high heat resistance for the problem that the heat distortion temperature of the existing PBT primer-free products is below 160°C, which cannot meet the high heat resistance requirements of the car lamp trim parts. Primer-free PBT composite material and preparation method thereof

Method used

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  • Low haze, high heat resistant and base coat-free PBT composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Adopt the following components by weight percentage among the present embodiment: polybutylene terephthalate (PBT) 90.5%, pentaerythritol stearate 3%, talcum powder 0.5%, β-(3,5-di-tert-butyl 1.0% stearyl-4-hydroxyphenyl) propionate, 5.0% carbon black. Each component of above-mentioned ratio is added in the high-speed batching mixer, high-speed mixing 1 minute; The premixed material after mixing is placed in twin-screw through melt extruding granulation, and the screw aspect ratio of twin-screw extruder is 36: 1. The number of vacuum ports is 1, and the extrusion process is: Twin-screw machine temperature zone: first-stage temperature 210°C, second-stage temperature 240°C, third-stage temperature 240°C, fourth-stage temperature 240°C, fifth-stage temperature 240°C , The head temperature is 250°C; the vacuum degree is -0.03MPa; the screw speed is 300rpm / min; the pelletizer speed: 300r / min; The particles are packaged to produce low haze, high heat resistance, and primer-...

Embodiment 2

[0038] The following components by weight percentage are used in this embodiment: 90.5% polybutylene terephthalate (PBT), 3% pentaerythritol stearate, 0.5% talcum powder, tetrakis[β-(3,5-di tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol 1.0%, carbon black 5.0%. Add each component of the above ratio into a high-speed batching mixer, and mix at a high speed for 1 minute; place the mixed premix in a twin-screw and granulate through melt extrusion, and the screw length-to-diameter ratio of the twin-screw extruder is 40: 1. The number of vacuum ports is 1, and the extrusion process is: Twin-screw machine temperature zone: first-stage temperature 210°C, second-stage temperature 240°C, third-stage temperature 240°C, fourth-stage temperature 240°C, fifth-stage temperature 240°C , The head temperature is 250°C; the vacuum degree is -0.05MPa; the screw speed is 300rpm / min; the pelletizer speed: 300r / min; The particles are packaged to produce low haze, high heat resistance, and...

Embodiment 3

[0040] In this embodiment, the following components by weight percentage are used: 90.5% polybutylene terephthalate (PBT), 3% pentaerythritol stearate, 0.5% talcum powder, N,N'-1,6- Hexyl-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide 1.0%, color masterbatch 5.0%. Each component of above-mentioned proportion is added in the high-speed batching mixer, high-speed mixing 1 minute; The premixed material after mixing is placed in twin-screw through melt extruding granulation, and the screw length-diameter ratio of twin-screw extruder is 48: 1. The number of vacuum ports is 2, and the extrusion process is: twin-screw machine temperature zone: first-stage temperature 210°C, second-stage temperature 240°C, third-stage temperature 240°C, fourth-stage temperature 240°C, fifth-stage temperature 240°C , The head temperature is 250°C; the vacuum degree is -0.1MPa; the screw speed is 400rpm / min; the pelletizer speed: 400r / min; The particles are packaged to produce low haze, high heat ...

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Abstract

The invention discloses a low haze, high heat resistant and base coat-free PBT composite material and a preparation method thereof, and aims to solve the problem that the thermal deformation temperatures of existing PBT base coat-free products are all below 160DEG C and cannot meet the high heat resistance requirements of car light decorating parts. One purpose of the invention is to provide the low haze, high heat resistant and base coat-free PBT material, and another purpose is to provide a preparation of the PBT composite material. Determination shows that the prepared PBT composite material has very good surface smoothness, and injection molded parts prepared by the PBT composite material can be subjected to vacuum aluminizing directly. At the same time, the invention effectively solves the surface haze phenomenon during long-term use of aluminized products under a high temperature environment. In addition, the product prepared by the method provided by the invention has very high thermal deformation temperature, can meet higher use requirement, and has significant progress relative to the prior art.

Description

technical field [0001] The invention relates to the field of materials, especially the field of modified materials, in particular to a PBT composite material with low haze, high heat resistance and no primer and a preparation method thereof. The invention relates to a PBT composite material and a preparation method thereof. The PBT composite material has the characteristics of low haze, high heat resistance and no primer. Background technique [0002] Polybutylene terephthalate, referred to as PBT, is an engineering plastic with excellent performance. It has excellent mechanical properties and fatigue resistance, good heat resistance, weather resistance and solubility resistance, good electrical properties, and low water absorption. And many other excellent characteristics, therefore, are widely used in automobiles, electronic products, industrial equipment, lighting and other fields. However, in some special occasions, such as the application of primer-free automotive lamp...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/06C08K13/02C08K5/103C08K3/34C08K5/134C08K3/04C08K5/20C08K5/098C08K5/526C08K3/30B29C47/92B29C48/92
CPCC08K13/02B29C48/92B29C2948/92514B29C2948/9258B29C2948/92704C08K3/04C08K3/30C08K3/34C08K5/098C08K5/103C08K5/1345C08K5/20C08K5/526C08K2003/3045C08L67/02C08L2201/08C08L2205/24C08L23/06C08K3/346
Inventor 杨克斌赵银巧黄精金钟辉
Owner SICHUAN COREMER CO LTD
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