Antimony-free reinforced flame-retardant polybutylece terephthalate (PBT) environmental-friendly material and preparation method thereof

Abstract

The invention discloses an antimony-free reinforced flame-retardant PBT environmental-friendly material and a preparation method thereof. The material is mainly composed of PBT resin, a compounding flame retardant, a compounded antioxidant, a flexibilizer and glass fibers; and has the advantages of being antimony-free and high in glow wire ignition temperature (GWIT), comparative tracking index (CTI) and relative temperature index (RTI).

Description

technical field [0001] The invention relates to a flame-retardant PBT environmental protection material and a preparation method thereof. Background technique [0002] As we all know: Asia, especially China, has become the main country for the synthesis of polybutylene terephthalate (PBT), and PBT modification has gradually shifted from European and American countries to Asian countries. The PBT modification in the Chinese market has averaged 20% in recent years. Speed ​​growth. For a long time, antimony halogen (mainly antimony bromine) flame retardants are usually used to enhance flame retardant polybutylene terephthalate (PBT) modified engineering plastics, and antimony halogen (bromine) flame retardants are usually used The modified PBT has the advantages of high flame retardant efficiency, good flame retardant effect, and high cost performance. It can meet the general low-end electronics, electrical appliances, lighting and other purposes, but it cannot meet the 60335 g...

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Problems solved by technology

[0009] There are some patents similar to the above, most of which are enhanced flame-retardant PBT materials that can only meet one or at most two requirements of high GWIT and high CTI; in addition: there are some patent reports: using PC, or PET and PBT to prepare alloy materials Improve GWIT, because the GWIT temperature of PC and PET materials is as high as 800 °C, so the alloy material can partially increase the GWIT, but it is known in actual work that due to the amorphous nature of PC and the slow crystallization of PET, the two alloy materials The formability is not very good, and the CTI of the final product is also very low

[0010] Therefore, like this patent, which can meet antimony-free, high glow wire ignition temperature (GWIT), high CTI, high RTI enhanced flame-retardant PBT materials, there is currently no relevant patent report; in fact, professionals are very clear: can meet IEC60335 PBT materials with ultra-high glow wire ignition temperature (minimum 750°C without ignition) and CTI≥300V must pass UL94V-0 flame retardant basic certification and 746B high RTI temperature index (generally above 120°C) certification to fully meet the requirements The high-end application requirements of PBT materials and the non-antimony endowment of products are in line with the general trend of today's environmental protection

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