Method for preparing black polyurethane elastic fiber via in situ polymerization
A polyurethane elastic, in-situ polymerization technology, applied in the direction of chemical characteristics of fibers, single-component synthetic polymer rayon, rayon manufacturing, etc., can solve the negative effects of fiber mechanical properties, the improvement effect is not obvious, and the spinnability of the original solution is reduced. and other problems, to achieve the effect of excellent mechanical properties, good spinnability and lasting black effect
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Embodiment 1
[0036] Dry nano-carbon black at 110°C for 2 hours, take 120g and add it to 680g of N,N-dimethylacetamide (DMAC), and grind it for 5 hours; then put the ground carbon black solution in an ultrasonic oscillator Medium-ultrasonic dispersion for 2 hours to obtain a stable nano-carbon black dispersion with a concentration of 15%.
[0037] Add 420g of nano-carbon black dispersion to a solution of 10Kg polytetrahydrofuran ether glycol and 5.385Kg of N,N-dimethylacetamide, stir at high speed for 3 hours; then add 2.3Kg of 4,4'-diphenyl Methane diisocyanate, polymerized at 45°C for 2 hours. Add 14.68Kg of N,N-dimethylacetamide to prepare a prepolymer solution.
[0038] Cool the prepolymer solution to below 15°C, and gradually add N,N-dimethylacetamide solution containing 0.216Kg of ethylenediamine, 0.014Kg of propylenediamine and 0.038Kg of diethylamine (the concentration of the amine is 3%) to carry out chain extension reaction and chain termination reaction; then add antioxidant, a...
Embodiment 2
[0041] Dry nano-carbon black at 110°C for 2 hours, take 100g and add it to 400g N,N-dimethylacetamide (DMAC), grind it for 4 hours; then put the ground carbon black solution in an ultrasonic oscillator Ultrasonic dispersion was performed for 3 hours to obtain a stable nano-carbon black dispersion with a concentration of 20%.
[0042] Add 485g of nano-carbon black dispersion to 7.5Kg of polytetrahydrofuran ether glycol and 4.038Kg of N,N-dimethylacetamide solution, stir at high speed for 3 hours; then add 1.782Kg of 4,4'-diphenyl Methane diisocyanate, polymerized at 45°C for 2 hours. Add 15.144Kg of N,N-dimethylacetamide to prepare a prepolymer solution.
[0043]Cool the prepolymer solution to below 15°C, gradually add N,N-dimethylacetamide solution containing 0.324Kg of ethylenediamine, 0.021Kg of propylenediamine and 0.057Kg of diethylamine (the concentration of the amine is 4%) for chain extension reaction and chain termination reaction; then add antioxidant, anti-yellowin...
Embodiment 3
[0046] Dry nano-carbon black at 110°C for 2 hours, take 630g and add it to 1170g N,N-dimethylacetamide (DMAC), and grind it for 7 hours; then put the ground carbon black solution in an ultrasonic oscillator Ultrasonic dispersion was performed for 4 hours to obtain a stable dispersion of nano-carbon black with a concentration of 35%.
[0047] Add 1363g of nano-carbon black dispersion into 13Kg of polytetrahydrofuran ether glycol and 6.8Kg of N,N-dimethylacetamide solution, stir at high speed for 3 hours; then add 2.9Kg of 4,4-diphenylmethane di Isocyanate, polymerized at 45°C for 2 hours. A prepolymer solution was prepared by adding 22.73 Kg of N,N-dimethylacetamide.
[0048] Cool the prepolymer solution to below 15°C, and gradually add N,N-dimethylacetamide solution containing 0.336Kg of ethylenediamine, 0.046Kg of propylenediamine and 0.061Kg of diethylamine (the concentration of the amine is 5%) for chain extension reaction and chain termination reaction; then add antioxid...
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