A kind of method of continuous production polyether amide

Abstract

The invention relates to a method for continuously producing polyether amide. The method mainly comprises the following steps: uniformly mixing lactam melt, an end capping agent, i.e., a dibasic acid,and water, and then, enabling the mixture to enter a pre-polymerization reactor for a pre-polymerization reaction, so as to obtain a carboxyl-terminated lactam prepolymer; uniformly mixing the obtained carboxyl-terminated lactam prepolymer, polyalkaneneglycol which is added on line and a catalyst by a shearing homogenizer, and then, enabling the mixture to enter a pre-polycondensation reactor fora pre-polycondensation reaction, so as to obtain polyether amide prepolymer melt; subjecting the obtained polyether amide prepolymer to a final polycondensation reaction in a final polycondensation reactor, so as to obtain polyether amide melt; and subjecting the obtained polyether amide melt to pelleting, extracting and drying sequentially, thereby obtaining polyether amide slices. According tothe method, through innovation of processing technologies, the accurate proportional adding of a modifier, i.e., polyalkaneneglycol in a continuous polyether amide production process and effective regulation and control on a polymerization reaction process are achieved, and the continuously produced polyether amide has high structural homogeneity.

Description

Technical field[0001]The invention relates to a method for continuously producing polyetheramide.Background technique[0002]Polyetheramide is a multi-block copolymer composed of polyamide hard segment and polyether soft segment. It has excellent processing properties, moisture absorption properties, mechanical properties, chemical resistance and other excellent comprehensive properties. It has been widely used in the automotive industry. , Machinery, textiles, electronic appliances, electrical precision instruments, sporting goods, medical, telecommunications and other fields.[0003]Patent CN200910200344.6 discloses a specific preparation process of a polyether block-containing polyamide thermoplastic elastomer: adding 100 minutes of amino-terminated polyether into a reaction vessel, heating to 140-180°C, and heating at 50-200 r / min Add 0.1-1 part of anionic catalyst under stirring at a speed of 0.5 to 1 hour after the catalyst reacts with the amino-terminated polyether, then add 50 t...

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Problems solved by technology

[0005] It can be seen that at present, the preparation of polyetheramide usually adopts a batch method. Although this method has the advantage of high production flexibility, the uniformity of the produced product is poor, and it is at an obvious disadvantage in terms of cost, quality and product.

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