Flame-retardant reinforced PBT (polybutylene terephthalate) composite and preparation method thereof
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A composite material and PBT resin technology, which is applied in the field of flame-retardant reinforced PBT composite materials and its preparation, can solve the problems of large dimensional shrinkage of parts, great influence on measurement accuracy, and influence on the appearance of pressure gauges, etc., to achieve short molding cycle, Good dimensional stability and low production cost
Inactive Publication Date: 2019-05-14
聚石化学(苏州)有限公司
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However, the pressure gauge casing prepared by the traditional flame-retardant reinforced PBT composite material is prone to problems such as serious floating fibers on the surface, large dimensional shrinkage of the part, and insufficient strength, which will not only affect the appearance of the pressure gauge, but also have a great impact on its measurement accuracy. Large, poor security and stability
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[0042] Embodiment and comparative example:
[0043] The raw material composition of the PBT composite material of embodiment 1~4 and comparative example 1~5 is as shown in the following table (according to mass percentage):
[0044] The raw material composition table (%) of the PBT composite material of table 1 embodiment 1~4 and comparative example 1~5
[0045]
[0046] Note:
[0047] The grade of PBT resin is 1200-211M, Changchun, Taiwan, China;
[0048] The grade of PET resin is TRN-8580FH, Teijin of Japan;
[0049] The grade of brominated epoxy resin is PH-116, BASF, Germany;
[0050] The grade of glass fiber (chopped strand) is ECS13-4.5-534A, Jushi Group Co., Ltd.;
[0051] The grade of glass beads is 050-20-216, French SOVITEC;
[0052] The grade of dendritic hyperbranched polymer is CYD-C600, the main component is hydroxyl-terminated hyperbranched polyester, Weihai Chenyuan Molecular New Materials Co., Ltd.;
[0053] The grade of POE-g-GMA (POE grafted glycidy...
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Abstract
The invention discloses a flame-retardant reinforced PBT (polybutylene terephthalate) composite and a preparation method thereof. The flame-retardant reinforced PBT composite comprises PBT resin, PET(polyethylene glycol terephthalate) resin, brominated epoxy resin, an antimony compound, glass fiber, glass beads, a dendritic hyperbranched polymer, a toughening agent, an anti-aging agent, a lubricant, a nucleating agent and color masterbatch. The preparation method includes: 1) pre-drying of the PBT resin and the PET resin; 2) pre-mixing of the PBT resin, the PET resin, the brominated epoxy resin, the antimony compound, the dendritic hyperbranched polymer, the toughening agent, the anti-aging agent, the lubricant, the nucleating agent and the color masterbatch; 3) extrusion granulation performed by adding the glass fiber and the glass beads. The flame-retardant reinforced PBT composite has the advantages of high gloss, good dimensional stability, low warpage, good weather resistance andthe like; the preparation process is simple, the production cost is low, and the flame-retardant reinforced PBT composite is suitable for pressure gauge housing materials.
Description
technical field [0001] The invention relates to a flame-retardant reinforced PBT composite material and a preparation method thereof. Background technique [0002] Pressure gauge is a widely used industrial product. It is used in almost all industrial processes and scientific research fields. It can be seen everywhere in heat pipe network, oil and gas transmission, water and gas supply system, etc. It has the functions of display, monitoring and early warning. The national standard (GB), the European standard (EN) and the American standard (ASME) have made corresponding standard specification systems for the accuracy of pressure gauges, such as the GB / T-1226 and GB / T1277 national standard systems that specify the accuracy level They are 0.1, 0.16, 0.25, 0.4, 1.0, 1.6, 2.5 and 4.0, which correspond to different error requirements. It can be seen that pressure gauges have very strict requirements on measurement accuracy and safety reliability. The casing of the pressure gaug...
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