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Polybutylene terephthalate composite and preparation method thereof

A technology of polybutylene terephthalate and composite materials, which is applied in the field of polybutylene terephthalate composite materials and its preparation, and can solve problems such as insufficient mechanical strength, easy yellowing, easy yellowing, etc. problem, to achieve good mechanical strength, improve mechanical strength and dimensional stability, and good anti-yellowing performance

Active Publication Date: 2015-11-25
SHENZHEN XINGSHENGDI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, PBT resin still has the problems of easy yellowing and insufficient mechanical strength under the action of light and heat.
[0003] And the current modified PBT materials are still prone to yellowing under the use environment, especially under the dual effects of light and heat, which not only affects the aesthetics of the product, but also reduces the mechanical strength and service life of the material. With continuous expansion, many industries, especially construction, automobiles, lighting fixtures, etc., have put forward higher requirements for the anti-yellowing performance of PBT materials

Method used

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  • Polybutylene terephthalate composite and preparation method thereof
  • Polybutylene terephthalate composite and preparation method thereof
  • Polybutylene terephthalate composite and preparation method thereof

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preparation example Construction

[0044] like figure 1 As shown, the preparation method of the polybutylene terephthalate composite material in one embodiment can be used to prepare the above-mentioned polybutylene terephthalate composite material. The preparation method of this polybutylene terephthalate composite material comprises the steps:

[0045] Step S110: Weigh the following raw materials according to the mass percentage: polybutylene terephthalate 40-52%, polyethylene terephthalate 10-15%, anti-yellowing additive 0.5-1% , 0.5-1% lubricant, 3-5% compatibilizer, 0.5-1% antioxidant and 30-40% glass fiber.

[0046] Among them, the intrinsic viscosity of polybutylene terephthalate (PBT) is 1.27-1.31 dL / g.

[0047] Among them, the intrinsic viscosity of polyethylene terephthalate is 1.41 to 1.47 dL / g.

[0048] Wherein, the anti-yellowing auxiliary agent is a mixture of an anti-ultraviolet stabilizer and a light stabilizer. Specifically, the mass ratio of the anti-ultraviolet stabilizer and light stabil...

Embodiment 1

[0072] The preparation steps of the polybutylene terephthalate composite material of the present embodiment are as follows:

[0073] (1) Bake polybutylene terephthalate at 103°C for 2 hours, so that the mass moisture content of polybutylene terephthalate is lower than 0.03%; The ester is baked at 103° C. for 2 hours, so that the mass water content of the polyethylene terephthalate is lower than 0.03%. Among them, the intrinsic viscosity of polybutylene terephthalate is 1.27-1.31 dL / g, and the intrinsic viscosity of polyethylene terephthalate is 1.41-1.47 dL / g.

[0074] (2) Weigh the following raw materials according to mass percentage: 40% of dried polybutylene terephthalate, 12% of dried polyethylene terephthalate, and 1% of anti-yellowing additive , 1% lubricant, 5% compatibilizer, 1% antioxidant and 40% glass fiber. Wherein, the anti-yellowing auxiliary agent is a mixture of an anti-ultraviolet stabilizer and a light stabilizer, and the mass ratio of the anti-ultraviolet ...

Embodiment 2

[0080] The preparation steps of the polybutylene terephthalate composite material of the present embodiment are as follows:

[0081] (1) Bake polybutylene terephthalate at 103°C for 3 hours, so that the mass moisture content of polybutylene terephthalate is lower than 0.03%; The ester is baked at 103° C. for 3 hours, so that the mass water content of the polyethylene terephthalate is lower than 0.03%. Among them, the intrinsic viscosity of polybutylene terephthalate is 1.27-1.31 dL / g, and the intrinsic viscosity of polyethylene terephthalate is 1.41-1.47 dL / g.

[0082] (2) Take the following raw materials according to mass percentage: 45% of dried polybutylene terephthalate, 15% of dried polyethylene terephthalate, and 0.8% of anti-yellowing additive , lubricant 0.7%, compatibilizer 3%, antioxidant 0.5% and glass fiber 35%. Among them, the anti-yellowing additive is a mixture of anti-ultraviolet stabilizer and light stabilizer, and the mass ratio of anti-ultraviolet stabiliz...

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Abstract

The invention relates to a polybutylene terephthalate composite and a preparation method thereof. The polybutylene terephthalate composite comprises, by mass, 40%-52% of polybutylene terephthalate, 10%-15% of polyethylene glycol terephthalate, 0.5%-1% of anti-yellowing auxiliaries, 0.5%-1% of lubricant, 3%-5% of compatilizer, 0.5%-1% of antioxygen and 30%-40% of glass fibers. The anti-yellowing auxiliaries are a mixture of uvioresistant stabilizer and light stabilizer, and the antioxygen is a mixture of phenol antioxygen, phosphite ester antioxygen and sulfur-containing antioxygen. The polybutylene terephthalate composite has the good mechanical strength and anti-yellowing performance.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polybutylene terephthalate composite material and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a saturated linear semi-crystalline polyester in thermoplastic polyester resin series. The rigid benzene ring and flexible fatty alcohol structure in its structure endow PBT with excellent mechanical properties, good Excellent fatigue resistance, good impact toughness, low friction coefficient, good heat resistance and good forming processability, etc. Polybutylene terephthalate is widely used in electronic appliances, auto parts, precision instruments and lighting fixtures and other fields. However, PBT resin still has the problems of easy yellowing and insufficient mechanical strength under the action of light and heat. [0003] And the current modified PBT materials are still prone to yellowing under the use environment...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L83/04C08L23/08C08K13/04C08K5/134C08K5/526C08K7/14B29C47/92B29C48/92
Inventor 许第修包含
Owner SHENZHEN XINGSHENGDI NEW MATERIALS
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