High glowing filament ignition temperature inflaming retarding reinforced poly(butylene terephthalate)

Abstract

The invention discloses high glowing filament ignition temperature inflaming retarding reinforced poly(butylene terephthalate) which comprises the following raw materials in parts by weight: 25-68 parts of synergistic agent, 1-10 parts of toughening agent, 0-1 part of main antioxygen, 0-1 part of auxiliary antioxygen and 10-40 parts of glass fiber. The inflaming retarding reinforced poly(butylene terephthalate) has high glowing filament ignition temperature, higher mechanical property and lower material cost; and a preparation method is simple without using special equipment and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a flame-retardant reinforced polybutylene terephthalate with a high glow-wire ignition temperature. Background technique [0002] Polybutylene terephthalate is referred to as PBT for short. PBT is a milky white translucent to opaque, crystalline thermoplastic polyester, which has the advantages of high heat resistance, toughness, fatigue resistance, self-lubrication, and low coefficient of friction. Flame retardant reinforced PBT is mainly used in the fields of automobile, electrical and electronic, machinery industry and so on. Among them, the components used in the electrical and electronic industry mainly include the deflection frame of the TV, the frame of the output transformer, the switch connector, the end cover of the motor of the refrigerator, and the washing machine, etc. Some components in these electronic products may cause local overheating due to reasons such as po...

AI Technical Summary

Problems solved by technology

[0006] A Chinese patent application with publication number CN101565536A discloses a high glow wire ignition temperature flame-retardant polybutylene terephthalate resin composition, which uses polyamide, polytrimethylene terephthalate, polycarbonate Resins such as ester and polyphenylene ether are used as synergistic resins. The disadvantage is that the price of the above resins is higher than that of polybutylene terephthalate, and the compatibility with polybutylene terephthalate is not very good. , easily lead to increased cost and decreased performance of the composition

In addition, it uses decabromodiphenyl ether, octabromoether, hexabromocyclododecane, etc. as flame retardants. The disadvantage is that although the EU RoHS directive does not explicitly ban decabromodiphenyl ether, in the production of commercial decabromodiphenyl ether In the process, there will inevitably be incomplete bromination, and there will be traces of by-products such as nonabromodiphenyl ether, octabromodiphenyl ether and even heptabromodiphenyl ether.

Except for decabromodiphenyl ether, other by-products are prohibited. Therefore, products manufactured using decabromodiphenyl ether as a flame retardant may easily bring the risk of exceeding the RoHS prohibited substances. Some large electrical appliance manufacturers in the world , such as Japan's Sony, Canon, Panasonic, etc. have clearly not used decabromodiphenyl ether as a flame retardant; the thermal decomposition temperature of octabromoether is 240 ° C, and the thermal decomposition temperature of hexabromocyclododecane modified by thermal stabilization It is only 242°C, and the set processing temperature of flame-retardant reinforced PBT is generally 240-260°C, and due to the interaction between the screw and the material to generate a lot of heat, the actual temperature inside the granulator is even greater than 250°C, so eight Bromoether and HBCD are not suitable for flame retardant PBT

The Chinese patent application with publication number CN101484525A discloses a flame-retardant polybutylene terephthalate resin composition, which is modified by blending liquid crystal polymer and polybutylene terephthalate, The disadvantage is that the source of liquid crystal polymer is scarce, the price is several times higher than that of polybutylene terephthalate, and the compatibility with polybutylene terephthalate is not good, resulting in a substantial increase in the cost of the composition and a decrease in performance

The Chinese patent application whose publication number is CN101418114A discloses a preparation method of flame retardant reinforced PBT with high glow wire ignition temperature. The flame retardant used is a compound flame retardant of phosphate and nitrogen flame retardant. The problem is that the mechanical properties of the material are not good, and the cost of the material rises more

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