Preparation method of nylon 6 having high hygroscopicity, high dyeing property and high elasticity
A technology with high elasticity and high moisture absorption, which is applied in the field of high moisture absorption dyeing and preparation of high elasticity nylon 6, which can solve the problems of insufficient elasticity, dyeability inferior to natural fibers, and high crystallinity of nylon 6 fibers.
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Embodiment 1
[0018] Using the widely used and mature hydrolysis ring-opening process route for the production of nylon 6, 800.0g of caprolactam, 14.8g of isophthalic acid, 8.0g of aminocaproic acid, 2.1g of SEED, and 2.5ml of 3-Diethylaminopropylamine, under the protection of nitrogen, slowly heat up from room temperature until the material melts, stir, heat up to 200°C for hydrolysis and ring-opening reaction for 2 hours; React 3h under the stirring speed of 3h; Then, depressurize to 5000Pa to react 2h, make composite amine / polyamide prepolymer; Add 88.9g molecular weight to the prepolymer that is 1000 polyethylene glycol and 0.9g Butyl titanate was reacted for 4 hours at a temperature of 270°C and a stirring speed of 500r / min; then, the pressure was reduced to 5000Pa and the reaction was carried out for 2 hours to obtain a complex amine / polyether / polycaprolactam copolymer; finally, it was extracted with boiling water and dried to produce High moisture absorption dyeing, high elasticity n...
Embodiment 2
[0020] Add 700.1g of caprolactam, 16.6g of isophthalic acid, 70.0g of aminocaproic acid, 2.5g of SEED, and 3.5ml of 3-diethylaminopropylamine into the reaction vessel, and slowly heat up from room temperature under nitrogen protection Until the material melts, stir and heat up to 210°C for hydrolysis and ring-opening reaction for 1 hour; then heat up to 260°C and react for 4 hours under a pressure of 0.4MPa and a stirring speed of 700r / min; then, reduce pressure to 2000Pa and react for 1 hour to prepare Obtain complex amine / polyamide prepolymer; Add 200.0g of poly(1,3-propylene glycol) with a molecular weight of 1000 and 2.0g of lithium alkoxide to the prepolymer under the protection of nitrogen. React at a stirring speed for 5 hours; then, reduce the pressure to 2000Pa and react for 3 hours to obtain a complex amine / polyether / polycaprolactam copolymer, and finally obtain highly hygroscopic dyed and highly elastic nylon 6 after boiling water extraction and drying.
Embodiment 3
[0022] Add the caprolactam of 600.1g, the terephthalic acid of 17.7g, the aminocaproic acid of 60.1g, the SEED of 2.0g, the 3-diethylaminopropylamine of 10ml in the reaction vessel, under nitrogen protection, slowly warming up from room temperature to The material is melted, stirred, and heated to 205°C for 1.5 hours of hydrolysis and ring-opening reaction; then heated to 250°C, reacted for 6 hours under a pressure of 0.6MPa and a stirring speed of 1000r / min; then reduced to 500Pa and reacted for 0.5h to prepare Obtain complex amine / polyamide prepolymer; Add 320.0g of poly-1,4-butanediol and 3.2g of butyl titanate with a molecular weight of 3000 to the prepolymer under nitrogen protection, at a temperature of 240°C, 1000r / React at a stirring speed of min for 6 hours; then, reduce the pressure to 500 and react for 2.5 hours to obtain a complex amine / polyether / polycaprolactam copolymer, and finally obtain a highly hygroscopic dyed and highly elastic nylon 6 after boiling water e...
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