Halogen-free compound flame retardant for glass fiber reinforced PBT (Polybutylene Terephthalate) material and preparation method thereof

A composite flame retardant and reinforcing material technology, which is applied in the field of halogen-free composite flame retardants, can solve the problems of unsatisfactory mechanical properties, poor dispersion, and low cost performance of PBT materials, and achieve mechanical and electrical properties and high efficiency. The effect of flame retardancy, good mechanical properties and electrical properties

Inactive Publication Date: 2011-04-06
广东省石油化工研究院
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  • Abstract
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  • Application Information

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Problems solved by technology

U.S. Patent US6255371 B1 proposes aluminum diethylphosphinate compounded with nitrogen-containing compound flame retardant glass fiber reinforced PBT material, the flame retardancy of 0.8mm thick sample reaches UL 94V-0 level, but this kind of product is expensive and not cost-effective High; US20080090950 proposes inorganic hypophosphite compound nitrogen-containing compound flame-retardant glass fiber reinforced PBT material, and its flammability passes UL 94V-0 level / 0.8mm, but the composition has poor dispersibility in PBT, resulting in mechanical damage of PBT material poor performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of halogen-free composite flame retardant: put aluminum phenyl phosphinate, melamine cyanurate, zinc borate, triphenyl phosphate and pentaerythritol stearate tetraester into high-speed mixing by weight percentage shown in table 1 Machine, heated to 90°C, processed at 2000r / min for 30 minutes, and then crushed to powder particle size D with a jet mill 90 <10μm, a halogen-free composite flame retardant is obtained.

[0022] Add 20% by weight halogen-free composite flame retardant, 45% PBT resin, 3% toughening compatibilizer, 1% lubricant, 0.5% antioxidant and 0.5% coupling agent to a high-speed mixer and mix well Then enter the twin-screw extruder to extrude and granulate, and at the same time add chopped glass fiber from the glass fiber port, the total percentage of which is 30%, and the twin-screw temperature is set between 230 °C. The prepared particles were made into test specimens according to the corresponding standards, and then the perf...

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Abstract

The invention discloses a halogen-free compound flame retardant for a glass fiber reinforced PBT (Polybutylene Terephthalate) material and a preparation method thereof. The halogen-free compound flame retardant is prepared from the following components in percentage by weight: 20-80 percent of phenyl aluminum phenylphosphinate, 10-60 percent of melamine cyanurate, 1-20 percent of zinc borate, 1-10 percent of triphenyl phosphate and 1-5 percent of pentaerythrityl tetraisostearate. The halogen-free compound flame retardant provided by the invention has high-efficiency flame-retardant performance, favorable processing performance, excellent mechanical performance and color stability and is applied to the glass fiber reinforced PBT material so that the glass fiber reinforced PBT material reaches a flame-retardant level of UL94V0 and can keep favorable mechanical performance and electric performance.

Description

technical field [0001] The invention relates to a halogen-free composite flame retardant applied to glass fiber reinforced polydibutyl terephthalate (PBT) materials. Background technique [0002] Polybutylene terephthalate, referred to as PBT, is a milky white color formed by polycondensation of 1.4-butanediol and terephthalic acid or terephthalate (DMT), and made through a mixing process. Translucent to opaque, crystalline thermoplastic polyester resin. PBT was first successfully developed by German scientists in 1942, and then industrialized in the United States. In 1970, it was put on the market with 30% glass fiber reinforced PBT plastic. Glass fiber reinforced PBT has excellent mechanical properties, electrical properties and heat resistance, and is widely used in automobiles, connectors, coil bobbins, electrical casings and other electrical and electronic components after flame retardant modification. In the prior art, the flame retardant additives used for glass fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K13/04C08K7/14C08K5/5313C08K5/3492C08K3/38C08K5/523C08K5/103
Inventor 李伟浩麦裕良陆云李华亮洪仰婉
Owner 广东省石油化工研究院
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