Ultrahigh heat-resistant polyester alloy for vehicle lamp and preparation method thereof

A kind of polyester alloy, extremely high technology, applied in the field of extremely high heat-resistant polyester alloy for car lights and its preparation, can solve problems that do not meet the development of new car lights, affect the safe use of car lights, and deform the lamp body. Achieve increased design flexibility, good dimensional stability, flow and improved high temperature performance

Inactive Publication Date: 2010-06-09
上海红京印实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The materials used for traditional car lights include: PP filling, heat-resistant ABS, PC / ABS, PC, etc. The heat-resistant temperature generally does not exceed 120 degrees, but there are many types of car lights that cause short-term temperatures exceeding 120 degrees due to frequent use, resulting in lamps Body deformation, affecting the safe use of lights
In terms of reflectors, the processing of BMC materials is extremely complicated, and the scrap rate is high, and the price of heat-resistant PC, PPS, PEI and other resins is too high, which does not meet the development of new car lights

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Material preparation: Mix PET and chain extender in a weight ratio of 100:1, after 3 minutes of high-speed stirring and 2 minutes of low-speed stirring, a PET nucleating agent blend is prepared for use; talcum powder and silane are coupled The agent is mixed according to the weight ratio of 100:1.5, and after 10 minutes of high-speed stirring, the talcum powder treated with the coupling agent is made, and it is ready for use; the phosphite and hindered phenol are mixed according to the weight ratio of 3:2 to make anti- Oxidizing agent, ready for use; mix oxidized polyethylene wax and polypentyl glycolate in a weight ratio of 3:2 to make a dispersant, ready for use.

[0024] Extrusion molding: after mixing 30 parts of PET nucleating agent blend, 40 parts of PBT, 0.5 part of antioxidant, 1 part of chain extender and 1 part of dispersing aid by weight, put it into a high-speed mixer and stir for 10 -50 minutes; add 0.8 parts of sodium antimonate and 0.9 parts of sodium dih...

Embodiment 2

[0028] Material preparation step is the same as embodiment 1

[0029] Extrusion molding: After mixing 40 parts of PET nucleating agent blends, 30 parts of PBT, 0.8 parts of antioxidants, 0.8 parts of chain extenders and 1.2 parts of dispersing aids by weight, put them into a high-speed mixer and stir for 10 -50 minutes; add 0.9 parts of sodium antimonate and 0.8 parts of sodium dihydrogen phosphate to the above mixture, and continue stirring for 10-15 minutes, then put the mixture into the kettle of the screw main feed;

[0030] Take 10 parts of montmorillonite, 0.5 parts of silicone powder and 15 parts of talcum powder treated with coupling agent, mix them, stir at a low speed for 5-8 minutes, and then throw them into the kettle fed by the screw side;

[0031] Set the extrusion temperature at 180, 200, 220, 240, 250, 250, 250, 250, and 235. After stabilization, turn on the main screw and side feeding motor, control the melt viscosity and screw torque, and extrude white plasti...

Embodiment 3

[0033] Material preparation step is the same as embodiment 1

[0034] Extrusion molding: After mixing 35 parts of PET nucleating agent blend, 35 parts of PBT, 0.5 part of antioxidant, 0.6 part of chain extender and 1 part of dispersing aid by weight, put it into a high-speed mixer and stir for 10 -50 minutes; Add 1 part of sodium antimonate and 1 part of sodium dihydrogen phosphate to the above mixture, and after continuing to stir for 10-15 minutes, put the mixture into the kettle of the main screw feed;

[0035] Take 13 parts of montmorillonite, 0.9 parts of silicone powder and 12 parts of talcum powder treated with coupling agent, mix them, stir at a low speed for 5-8 minutes, and then throw them into the kettle fed by the screw side;

[0036] Set the extrusion temperature at 180, 200, 220, 240, 250, 250, 250, 250, and 235. After stabilization, turn on the main screw and side feeding motor, control the melt viscosity and screw torque, and extrude white plastic particles.

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PUM

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Abstract

The invention provides an ultrahigh heat-resistant polyester alloy for a vehicle lamp, which comprises the following components in part by weight: 30 to 40 parts of PET nucleating agent blend, 30 to 50 parts of PBT, 0.5 to 0.8 parts of antioxidant, 0.6 to 1.2 parts of chain extender, 1 to 1.5 parts of dispersing aid, 10 to 20 parts of montmorillonoid, 0.5 to 0.9 part of silicone powder, 10 to 15 parts of talcpowder treated by coupling agent, 0.8 to 2 parts of antimonite and 0.8 to 2 parts of sodium dihydrogen phosphate. The polyester alloy of the invention keeps good workability, low temperature resistance, weather resistance and chemical resistance of thermoplastic polyester, improves the crystallinity and shaping workability of PET, has excellent heat resistance (the thermal deformation temperature under 0.46MPa reaches 222 DEG C) and good size stability, can replace the traditional BMC manufactured reflection component, and realizes integration of a reflector of a head lamp and a lamp body.

Description

technical field [0001] The invention relates to a polyester alloy and a preparation method thereof, in particular to a very high heat-resistant polyester alloy for vehicle lamps and a preparation method thereof. Background technique [0002] Car lights are composed of lamp holders, lamp bodies, reflectors, decorative rings and light distribution mirrors. Generally speaking, car lights are divided into lighting lights and signal lights. The former includes headlights, fog lights, reversing lights, etc., and the latter includes Turn signals, marker lights, tail lights, etc. Car lights of different shapes and different functions have different requirements for the material of the car lights. The lighting power of the headlights and fog lights is the highest, which is almost three times that of other car lights, or even higher. Therefore, these two car lights The material should have high heat resistance, and the reflector, which is the most heated plastic part in the lamp, als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/06B29B9/12B29C47/10B29C47/92C08K9/06C08K3/34C08K3/24C08K3/32B29C48/04B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/9185B29C2948/92533B29C2948/92695B29C2948/92885B29C2948/92895
Inventor 黄海峰李新华
Owner 上海红京印实业有限公司
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