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Polyurethane resin for impregnation of superfine fiber and preparation method thereof

A polyurethane resin and ultrafine fiber technology, applied in the field of polyurethane resin, can solve the problems of poor solvent resistance and acid and alkali resistance, failure to meet the requirements for impregnation of ultrafine fibers, performance degradation, etc. The effect of dyeability, good surface feel

Active Publication Date: 2016-07-27
ZHEJIANG JOYA POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it is necessary to use strong alkali to reduce the weight in the preparation process of ultrafine fiber products, it is required that the polyurethane resin slurry cannot be dissolved in strong alkali or cause performance degradation
However, the polyurethane resins in the prior art have poor solvent resistance and acid and alkali resistance as a whole, and cannot meet the requirements for impregnating superfine fibers.

Method used

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  • Polyurethane resin for impregnation of superfine fiber and preparation method thereof
  • Polyurethane resin for impregnation of superfine fiber and preparation method thereof
  • Polyurethane resin for impregnation of superfine fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A polyurethane resin for impregnating superfine fibers, prepared from the following components:

[0030] MDI: 105.5g

[0031] PTMEG-1000: 55.5g

[0032] PCL-2000: 66.6g

[0033] PEG-2000: 44.4g

[0034] Ethylene glycol: 28g

[0035] DMF:700g

[0036] Its preparation method is as follows:

[0037] Step 1: Feed 55.5g of PTMEG-1000, 66.6g of PCL-2000 and 44.4g of PEG-2000 into the reactor, heat it to melt into a liquid, put in 28g of chain extender ethylene glycol, and then put in 420g of DMF for synthesis reaction;

[0038] Step 2: After stirring the reaction materials in step 1 for one hour, feed 105.5g MDI twice; at 60°C, put half the amount of MDI in for the first time, and the temperature will rise rapidly after adding MDI. Control the MDI Adding speed, keeping the temperature of 60°C for 20 minutes; for the second time, keeping the temperature of 80°C, put in the remaining amount of MDI, control the adding speed of MDI, stir for 20 minutes after reaching the pr...

Embodiment 2

[0043] A polyurethane resin for impregnating superfine fibers, prepared from the following components:

[0044] MDI:95g

[0045] PTMEG-1000: 50g

[0046] PCL-2000: 60g

[0047] PEG-2000: 40g

[0048] Ethylene glycol: 25.2g

[0049] DMF:630.9g

[0050] Its preparation method is as follows:

[0051] Step 1: Feed 50g of PTMEG-1000, 60g of PCL-2000 and 40g of PEG-2000 into the reactor, heat it to melt into a liquid, put in 25.2g of chain extender ethylene glycol, and then put in 378.42g of DMF for synthesis reaction;

[0052] Step 2: After stirring the reaction materials in step 1 for one hour, feed 95g of MDI twice; at 60°C, put in half the amount of MDI for the first time, and the temperature will rise rapidly after adding MDI, so control the addition of MDI Speed, keep the temperature at 60°C for 20 minutes; keep the temperature at 80°C for the second time, put in the remaining amount of MDI, control the speed of MDI addition, stir for 20 minutes after reaching the pre-po...

Embodiment 3

[0057]A polyurethane resin for impregnating superfine fibers, prepared from the following components:

[0058] MDI: 80g

[0059] PTMEG-1000: 30g

[0060] PCL-2000: 70g

[0061] PEG-2000: 80g

[0062] Ethylene glycol: 50g

[0063] DMF:690g

[0064] Its preparation method is as follows:

[0065] Step 1: Feed 30g of PTMEG-1000, 70g of PCL-2000 and 80g of PEG-2000 into the reactor, heat it to melt into a liquid, put in 50g of chain extender ethylene glycol, and then put in 420g of DMF for synthesis reaction;

[0066] Step 2: After stirring the reaction materials in step 1 for one hour, feed 80g of MDI twice; at 60°C, add half of the amount of MDI for the first time, and the temperature will rise rapidly after adding MDI, so control the addition of MDI Speed, keep the temperature at 60°C for 20 minutes; for the second time, keep the temperature at 80°C, put in the remaining amount of MDI, control the speed of MDI addition, stir for 20 minutes after reaching the pre-polymeriza...

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Abstract

The invention relates to polyurethane resin, in particular to polyurethane resin for impregnation of superfine fiber and a preparation method thereof. The polyurethane resin is prepared from the following components in percentage by weight: 8%-15% of MDI (4, 4-diphenylmethane diisocyanate), 3%-8% of polyether polyol PTMEG-1000, 5%-7% of caprolactone PCL-2000, 3%-8% of polyester polyol PEG-2000, 2%-5% of ethylene glycol EG and 65%-70% of DMF (N,N-dimethylformamide). The polyurethane resin has the advantages that by utilization of the characteristics of the polyester polyol and the polyether polyol, the synthesized polyurethane resin is used for impregnation of the superfine fiber; when the superfine fiber is used for alkali decrement under the action of sodium hydroxide with the concentration of 10%-15%, the resin dropping rate is high, and good surface touch feel can be generated, so that the dyeable performance of the superfine fiber can be improved and the quality of a product is excellent.

Description

technical field [0001] The invention relates to a polyurethane resin, in particular to a polyurethane resin for impregnating superfine fibers and a preparation method thereof. Background technique [0002] Textiles made of microfibers need to be impregnated and coated with polyurethane resin in the post-finishing process. At present, microfiber impregnated products have the characteristics of hard hand feeling and uneven dyeing property. The common method is to use sodium hydroxide to reduce the weight. This method has a good surface touch, can be dyed, and has bright colors. [0003] The raw material formula of polyurethane resin in the prior art is usually made up of polyester polyol, polyether polyol, chain extender, isocyanate, organic solvent, chain terminator and antioxidant and other auxiliary agents, mainly adopts two-step method (pre- polymer method) synthesis. Since it is necessary to use a strong alkali to reduce the weight during the preparation of the microfib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32D06M15/572D06M15/568
Inventor 贝文理赵锡山叶青向黎
Owner ZHEJIANG JOYA POLYMER TECH
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