Prepn process and apparatus of polyurethane fiber

A polyurethane fiber and prepolymer technology, applied in the direction of single-component polyurethane artificial filament, etc., can solve the problems of increasing cost, process time, and difficulty in realization

Inactive Publication Date: 2004-04-28
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of the prior art is carried out in a tank reactor with a jacket and agitator. In this tank reactor, it is difficult to cool down from the reaction temperature to the temperature at which the prepolymer is stable.
The old process mostly uses low-temperature water switching in the jacket, and realizes heat transfer under high-intensity stirring, so the cost and process time are increased. Experiments have proved that the process time of the tank reactor is about the same as that of the tubular reactor. 1.33 times of

Method used

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  • Prepn process and apparatus of polyurethane fiber

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0076] In the experiment of experimental device A, 5.1kg of PTMEG, 0.9kg of MDI, and 0.01kg of 1,3 propylene glycol were mixed evenly, and then 6kg was put into the tubular prepolymerization reactor R101, mixed, the reaction temperature was 70°C, and the reaction was carried out for 120 minutes to generate prepolymerization. The polymer was cooled to 42°C when it was discharged from the reactor, and the process took 175 minutes; the prepolymer was placed in N 2 In the protected container, add 9.0kg DMAC, enter the continuous polymerization reactor with 15kg after stirring evenly. Prepare 0.139kg of mixed diamine composed of ethylenediamine, diethylamine and propylenediamine in a volume ratio of 70:10:20, and add 3.75kg of DMAC. Add 3.889kg of this mixed solution into the polymerization reactor at the same time as the prepolymer solution. Cooling water at 5°C is passed through the jacket of the reactor to maintain the temperature at about 20°C during the reaction. After reacti...

experiment example 2

[0081] The experiment was carried out in the experimental device B, with PTMEG40.8kg, MDI7.2kg, 1,3 propylene glycol 0.08kg mixed evenly. The reaction temperature is 70°C, the reaction time is 120min, and a prepolymer is generated, and the prepolymer discharged from the prepolymerization reactor is placed in N 2 In the protected container, it takes 245 minutes to cool the prepolymer to 40-45°C by passing water at 5°C. Add 73.2kg of DMF, stir evenly and enter the continuous polymerization reactor with 122.08kg. Prepare 1.096g of ethylenediamine, diethylamine, and propylenediamine in a volume ratio of 70:10:20, and add 32.99kg of DMF. Add 152.75 kg of this mixed solution to the polymerization reactor simultaneously with the prepolymer solution. Cooling water at 5° C. is passed through the jacket of the reactor to maintain the temperature at about 20° C. during the reaction. After reacting for one hour, 152.75 kg of the reaction solution entered the screw mixer, and at the same...

experiment example 3

[0088] In the experiment of experimental device A, 5.1kg of PTMEG, 0.9kg of MDI, and 0.01kg of n-butanol were mixed uniformly and then 6kg was put into the tubular prepolymerization reactor R101. The total time of the process was 182min. Add 4.91kg of pyrrolidone, stir evenly and enter the continuous polymerization reactor with 10.9kg. Configure ethylenediamine, diethylamine, propylenediamine 0.14kg altogether, its volume ratio is 70:10:20, add 2.41kg pyrrolidone. Add 2.56kg of this mixed fiber solution and the prepolymer solution into the polymerization reactor at the same time. Cooling water at 5°C is passed through the jacket of the reactor to maintain the temperature at about 20°C during the reaction. After reacting for one hour, 13.47 kg of the reaction solution entered the screw mixer, and 60 g of LD622 antioxidant (ciba company product) was added at the same time, and 43.45 g of solvent was added, and the mixed solution entered the spinning system.

[0089] The amount ...

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Abstract

The present invention relates to preparation process and apparatus of polyurethane fiber. The preparation process includes: mixing PTMEG, MDI and 1,3-propylene glycol in a prepolymerizing reactor; and pre-polymerization in the prepolymerizing reactor separated into two sections, including a front main section to the material to the reaction temperature of 70-75 deg.c via 80-90 deg.c hot water led into its jacket and a back section to cool and stabilize the prepolymer via 5 deg.c cooling water led into its jacket. The solvent used is pyrrolidone, which can makes the chain-expanding reaction smooth, eliminate gel and raise the concentration of spinning liquid and the chain expanding agent used is benzene diamine and dibutylamine to raise the strength and dyeing performance of the fiber.

Description

(1) Technical field [0001] The present invention relates to a kind of method for preparing polyurethane fiber, specifically, the present invention relates to a kind of polyether diol (PTMEG), diisocyanate (MDI) and 1, after 3 propanediol reacts to generate prepolymer, then add containing benzene The mixed diamine of diamine and dibutylamine, the solvent pyrrolidone, and the method for chain extension reaction to generate polyurethane fiber mother liquor, the invention also relates to a device for realizing the above method. (2) Background technology [0002] Polyurethane fiber elastomers have been widely used in the textile industry, and spandex, which usually describes elastomers, refers to long-chain synthetic polymers containing 85 wt% block polyurethane. Elastane fibers are used in the textile industry for different purposes, for example from them to make underwear, tights, swimwear, elastic garments or stockings. Elastomeric fibers can be used as corespun elastomeric y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/70
Inventor 吕涛范天民黄柽苏亚贵韩兵蒲海龙
Owner 中国中化股份有限公司
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