A kind of copolyether ester and its preparation method and application

Abstract

The present invention provides a copolyether ester and its preparation method and application, comprising the steps of: dimethyl naphthalate, p-(methyl ester-phenyl-3-trifluoromethyl-4-amino)-(methyl ester- Phenyl‑3‑trifluoromethyl‑4‑amidoethyl) phenylphosphine oxide, low molecular weight nylon 6 dimethyl ester, 1,4‑butanediol, polytetrahydrofuran ether, catalyst, antioxidant, nucleating agent Add it into the polymerization tank in proportion, and obtain copolyether ester through transesterification reaction and polycondensation reaction; the copolyether ester is injection molded or extruded to obtain a shock-absorbing elastic element mold base, and then undergoes machining and post-processing to obtain a shock-absorbing element , the copolyetherester contains ether ester unit, ether ester amide unit, flame retardant unit, has excellent self-lubrication, wear resistance, creep resistance, bending fatigue ability, flame retardancy, outstanding chemical resistance and comparative With a wide working temperature, the shock absorbing element prepared by the copolyether ester can be widely used in buffer devices in rail transit, vehicles, construction machinery, elevators and other fields.

Description

technical field [0001] The invention relates to the field of cushioning materials, in particular to a copolyether ester, its preparation method and application. Background technique [0002] Thermoplastic copolyetherester elastomer is also often used as an engineering-grade elastomer, which has excellent physical and mechanical properties and is widely used in the automotive industry, electronic appliances, electrical instruments, industrial products, communications, sporting goods, shoemaking, etc. Many fields, especially buffer devices in rail transit vehicles, engineering machinery, elevators and other fields, have a wide range of applications. At present, the industrial polyether ester elastomer mostly uses long-chain polyether ester composed of terephthalic acid (PTA) or dimethyl terephthalate (DMT) and polytetramethyl ether (PTMG) as the soft segment. A short-chain polyester such as butylene terephthalate (PTB) composed of PTA or DMT and 1,4-butanediol is used as a ha...

AI Technical Summary

Problems solved by technology

The steps of the preparation method are relatively complicated, and it is only recorded in this document that the compression spring has the problem of compressing more than 30% without breaking, and there is no relevant record on other properties of the compression spring

Patent CN102432856A introduces a copolyether ester containing hydroxyl-terminated polybutadiene soft segments, which is mixed with additives and then injected into an oval shape, and then molded into a cushion gasket. Although the pressure resistance of the cushion gasket meets the technical requirements, the Does not meet the requirements of flame retardancy, and the molding process is complicated and the cycle is long

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