Flame-retardant reinforced PBT (polybutylene terephthalate) plastic meeting requirement for incombustibility of glow wire at temperature of 850 DEG C and preparation method thereof

Abstract

The invention discloses flame-retardant reinforced PBT (polybutylene terephthalate) plastic meeting the requirement for incombustibility of a glow wire at the temperature of 850 DEG C. The plastic comprises the following components in percentage by weight: 25-35% of PBT, 5-10% of PET (polyethylene terephthalate), 5-10% of MCA (methyl cyanoacrylate), 5-8% of decabromodiphenyl ethane, 5-8% of brominated epoxy resin, 3-5% of sodium antimonite, 3-5% of TPP (triphenyl phosphate), 1-3% of EMA-g-GMA, 1-3% of zinc borate, 0.5-1% of antioxidants, 0.4-1% of lubricants and 25-30% of glass fiber. The PBT plastic is prepared from multiple flame retardants in a compounding mode, the flame-retardant efficiency is improved, the use quantity of the flame retardants is reduced, the flame retardance and the mechanical performance are both considered, the requirement that the glow wire does not combust at the temperature of 850 DEG C can be met, the requirement for the mechanical performance is also met and the PBT plastic is suitable for practical use.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant reinforced PBT plastic that does not burn at 850-degree glow wires and a preparation method thereof. Background technique [0002] Polybutylene terephthalate, the English name polybutylene terephthalate (referred to as PBT), is a thermoplastic polyester, which was developed by the American Celanese company in the early 1970s. PBT has very good heat resistance, weather resistance, chemical resistance, and has the advantages of excellent electrical properties, small water absorption, and good surface. It is widely used in electronics, automobiles, machinery, household appliances and other industries, especially Electronic and electrical industry. [0003] Generally, the electrical and electronic industry has flame retardant requirements for most materials, and generally requires the glow wire to be non-ignitable at a temperature of 750°C throughout the ...

AI Technical Summary

Problems solved by technology

However, according to the traditional improvement method, the flame retardant is continued to be added to the PBT material whose glow-wire non-ignition temperature reaches 750°C. Although the glow-wire non-ignition temperature of the PBT material can reach 850°C, the mechanical properties of the material will be affected. Completely lost, no practical application value

For example, bromotriazine, antimony trioxide, and MCA flame retardant (Chinese name: melamine cyanurate) are currently used in combination to improve the flame retardancy of PBT materials, but the obtained PBT materials have very poor mechanical properties.

Moreover, due to the large amount of flame retardant added, the powder is directly added without treatment, which makes the processing technology difficult to control

In addition, there are few types of flame retardants, low flame retardant efficiency and glow wire efficiency, so the addition amount is large, and the cost of bromotriazine is expensive, resulting in high cost and not suitable for practical application

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