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Polyether montmorillonite modified polyurethane heat resistant elastic fibre and its preparation method

A technology of polyurethane elasticity and polyurethane fiber, applied in the direction of single-component polyurethane artificial filament, etc., can solve the problems of poor dyeability of spandex, difficulty in meeting diversified color requirements, and influence of spandex heat resistance

Inactive Publication Date: 2005-11-09
太仓中化环保化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, spandex has poor dyeability. When spandex is blended with other fibers, especially polyester-spandex blends, affected by the heat resistance of spandex, polyester-spandex blended fabrics are difficult to meet people's diverse color requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 30 g of dry sodium-based montmorillonite, dissolve it in 350 g of deionized water, stir at 40°C to form a stable homogeneous system, and filter the insoluble suspended matter with a 300-mesh filter to obtain a homogeneous solution B;

[0039] Dissolve 10 g of cetyltrimethylammonium bromide in 150 g of deionized water, stir evenly, add to solution B obtained in step 1, and stir at 70°C for 3 hours to obtain solution C;

[0040] Weigh 8 g of polytetrahydrofuran (PTMEG) and dissolve it in 600 g of DMAc, stir at 50° C., add it to the solution C obtained in step 2, and continue stirring at 70° C. until the water content is lower than 0.07% to obtain solution D, which is reacted in N 2 environment;

[0041] Solution D was dried and the solvent was removed. And the obtained modified montmorillonite was ground, sieved with a 300-mesh filter screen, and then vacuum-dried for 12 hours, for subsequent use;

[0042] Accurately weigh 3.5 g of the modified montmorillonite obt...

Embodiment 2

[0048] Weigh 30 g of dry sodium-based montmorillonite, dissolve it in 350 g of deionized water, stir at 40°C to form a stable homogeneous system, and filter the insoluble suspended matter with a 300-mesh filter to obtain a homogeneous solution B;

[0049] Dissolve 15 g of cetyl trimethyl ammonium bromide in 150 g of deionized water, stir evenly, add to solution B obtained in step 1, and stir at 70 ° C for 2 hours to obtain solution C;

[0050] Weigh 8 g of polytetrahydrofuran (PTMEG) and dissolve it in 600 g of DMAc, stir at 50° C., add it to the solution C obtained in step 2, and continue stirring at 70° C. until the water content is lower than 0.07% to obtain solution D, which is reacted in N 2 environment;

[0051] The solution D was dried, the solvent was removed, and the obtained modified montmorillonite was ground, sieved with a 300-mesh filter screen, and then vacuum-dried for 12 hours, for subsequent use;

[0052] Accurately weigh 3.5 g of the modified montmorillonite...

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Abstract

The invention discloses a method of modifying montmorillonite with PTMEG, using modified montmorillonite-PTMEG as soft chain segment of polyurethane to prepare montmorillonite / polyurethane nano composite polymer (PU / MMT), thus improving heat resisting property and mechanical property of polyurethane elastic fiber, where montmorillonite is sodium base montmorillonite, which is performed by the first layered modification of PTMEG to first enlarge the space between montmorillonite layers; in a solvent system, the invention uses cyannate to perform the second layered modification on the sodium base montmorillonite to second enlarge the space between montmorillonite layers; the layered modified prepolymer is polymerized with small molecular amine for chain extension, thus third enlarging the space between montmorillonite layers, and finally making a peeling montmorillonite-polyurethane nano composite, thus improving the heat resistant property and mechanical property of polyurethane.

Description

(1) Technical field [0001] The invention relates to a method for modifying montmorillonite by using polyether polyol, and then using the modified montmorillonite as part of the soft segment to synthesize a polyurethane polymer to improve its heat resistance and mechanical properties. That is, the polyether polyol is used to modify the montmorillonite in the organic solvent system to increase the interlayer spacing for the first time; then the modified montmorillonite and isocyanate are intercalated and prepolymerized to make the layer of The spacing increases for the second time; the intercalated modified prepolymer is chain-extended with small molecular amine, and the spacing between the montmorillonite layers is increased for the third time, and finally the exfoliated montmorillonite / polyurethane nanocomposite polymer is obtained. , to improve the heat-resistant effect of polyurethane elastic fiber, while improving its mechanical properties. [0002] Unless otherwise specif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70
Inventor 苏亚贵倪平陆晓勇华怀峰张峰刘如茂张晓红
Owner 太仓中化环保化工有限公司
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