High temperature resistant nylon/PTT (polytrimethylene terephthalate)/PEIP (polyetherimide)/PBIP (polybenzimidazole) copolymer as well as preparation method and application thereof

Abstract

The invention discloses a high temperature resistant nylon / PTT / PEIP / PBIP copolymer as well as a preparation method and an application thereof. The preparation method comprises the following steps: dissolving PPT resin, PEIP resin and PBIP resin and diamine in a solvent, polymerizing for 4-10 hours at 190-290 DEG C and pressure of 1.5-2.5 MPa to obtain the high temperature resistant nylon / PTT / PEIP / PBIP copolymer, wherein the mole ratio of the PTT to PEIP to PBIP to the diamine is (30-60): (15-30): (15-30): (70-99). The copolymer not only has good processing fluidity and impact strength, but also has good high temperature resistance.

Description

technical field [0001] The invention relates to a high temperature resistant nylon and its preparation method and application, in particular to a high temperature resistant nylon / polypropylene terephthalate (PTT) / polyethylene isophthalate (PEIP) / polyethylene Butylene isophthalate (PBIP) copolymer and its preparation method and application. Background technique [0002] Polyamide, commonly known as nylon, is a class of engineering plastics with excellent physical and mechanical properties. Aliphatic nylon, such as PA6 and PA66, has excellent mechanical strength, heat resistance, chemical resistance, wear resistance and self-lubricating properties. Its application fields include electronic appliances, automotive parts, furniture, building materials and fibers. Has become one of the important engineering plastics. [0003] In recent years, with the development of the industrial situation, the electronics, electrical appliances, information and other industries require equipme...

AI Technical Summary

Problems solved by technology

However, because most of the diamines and dibasic acid monomers used in the polymerization of high-temperature nylon have low solubility in water, it is difficult to judge the end point of the reaction in the process of salt formation

In the actual production process, it is also possible to raise the temperature of the system to form a salt, and then separate, purify, and dry to obtain a nylon salt, but this increases the cost and the cumbersome production process

[0007] Patents CN102660019A, CN102634012, and CN102660018 of Kingfa Science and Technology Co., Ltd. disclose similar technical solutions, involving polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyethylene naphthalate Three kinds of polyesters of ethylene glycol formate (PEN), the experimental plan to finally obtain one of 6T and 6N (or 10T, 10N, 12T, 12N according to the different diamines used) or their blends, the purpose Both introduce the benzene ring of terephthalic acid (T) into the main chain to prepare semi-aromatic nylon. Compared with the present invention, its impact strength is not high enough, its fluidity is poor, and its high temperature resistance is relatively poor

[0008] At present, there is no relevant report on improving material processing fluidity, improving impact strength and improving brittleness by preparing high temperature resistant nylon / PTT / PEIP / PBIP copolymer

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