Low-warpage, damp-heat-aging-resistance high-pressure-resistant flame-retardant polyester material and preparation method

Abstract

The invention discloses a low-warpage damp-heat-aging-resistant high-pressure-resistant flame-retardant polyester material and a preparation method. The material mainly comprises the following components: polybutylene terephthalate resin, a main flame retardant, an auxiliary flame retardant, a filler or other resins, glass fibers, a flexibilizer, a composite antioxidant, a stabilizer and other auxiliaries. The prepared low-warpage damp-heat aging resistant halogen-free flame-retardant polyester material is high in dimensional stability in the use process, high in retention rate of various mechanical properties under long-term high-temperature and high-humidity conditions and excellent in electrical property, mainly meets the requirements of high-pressure-resistant parts under severe environmental conditions in the fields of electronic and electrical products and new energy automobiles, such as a plug for charging, peripheral parts of a high-voltage battery, a leakage protector, a junction box and the like.

Description

technical field [0001] The invention relates to a flame-retardant polyester material and a preparation method. Background technique [0002] PBT is a resin with well-balanced mechanical properties, electrical properties, etc., but because it is a crystalline material, there is a problem of warping and deformation during molding, and PBT resin is relatively easy to hydrolyze under high temperature and high humidity due to the presence of ester groups. After hydrolysis The performance indicators of PBT materials will decrease, which will shorten the service life of materials. At present, in the fields of new energy vehicles, electronic appliances, and communication equipment, PBT materials are not only required to provide flame retardancy, but also require materials to be used in relatively harsh environments. The durability of the material can be maintained in the environment such as high temperature and high humidity, that is, the service life of the material can be extended...

AI Technical Summary

Problems solved by technology

[0002] PBT is a resin with well-balanced mechanical properties, electrical properties, etc., but because it is a crystalline material, there is a problem of warping and deformation during molding, and PBT resin is relatively easy to hydrolyze under high temperature and high humidity due to the presence of ester groups. After hydrolysis The performance indicators of PBT materials will decrease, which will shorten the service life of materials. At present, in the fields of new energy vehicles, electronic appliances, and communication equipment, PBT materials are not only required to provide flame retardancy, but also require materials to be used in relatively harsh environments. The durability of the material can be maintained in the environment such as high temperature and high humidity, that is, the service life of the material can be extended when the environment is harsh. At the same time, it is used in various occasions such as auto parts, electronics, and electrical parts There are more and more examples of components, which requires materials to have high tracking resistance performance. For example, the relative tracking index CTI can reach 600V. For high-voltage parts with sufficient creepage distance, it can ensure that the vehicle and electronic High device reliability