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Composite antioxidant for polyurethane fiber

A composite antioxidant and polyurethane technology, applied in the field of composite antioxidants, can solve the problems of inability to meet the anti-yellowing effect of spandex, unstable fiber physical properties, etc., and achieve the effect of improving anti-yellowing and thermal stability.

Inactive Publication Date: 2010-07-14
迪比喜化学贸易(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the combination of hindered phenolic antioxidants and other additives can improve the above effects, there are still some deficiencies; Dehydration, resulting in pinholes, resulting in unstable physical properties of the fiber after spinning
However, when single-component hindered phenolic antioxidants are used alone, the anti-yellowing effect of spandex cannot be satisfied.

Method used

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  • Composite antioxidant for polyurethane fiber
  • Composite antioxidant for polyurethane fiber
  • Composite antioxidant for polyurethane fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix 1mol ether polyol (PTMEG; molecular weight 2000±100) with 2mol diisocyanate (MDI), react at 80-90°C to form a polymer with isocyanate at the end, then cool to about 55°C, and then add N, N -Dimethylacetamide (DMAc) is made into a solution containing 45% solid content, and then ethylenediamine and cyclohexanediamine are added as chain extenders, and diethylamine is used as a capping agent. At this time, polyurethane resin The content is about 36%, and the viscosity is about 2200 poise (poise; 40°C).

[0018] Divide the viscous liquid into several parts and add the additives shown in Table 1 respectively, mix and dissolve, and then apply it on a flat glass to form a film, and measure its YI value in an oven at 100°C for 30 hours. The test results are shown in Table 1; it can be seen from Table 1 that the two-component antioxidants such as 2 and 4 are significantly better than the single components 1 and 3, and the two-component compositions 6 and 4 are also significan...

Embodiment 2

[0027] Take 100 parts of thermoplastic polyurethane resin (TPU product name: S-195AL; provided by Taiwan Kunzhong Company) and dry it in an oven for 5 hours. Injection pressure: 120kgf / cm 2), the size of the test piece was made into a circular test piece (diameter 50mm, thickness 2mm), and the weather resistance (QUV; 12 hours), smoke (50°C; 16 hours) and heat drying (150°C; 30 minutes) and Yellowing index (YI) of boiling (95°C; 1 hour). The test results are shown in Table 3; as can be seen from Table 3, the weather resistance, smoke resistance, cycle temperature resistance and hydrolysis resistance of the two-component formulations of the present invention such as 12, 13 and 14 are significantly better than those of the single components 11 and 15; the composition 16 is also relatively Better than composition 17.

[0028] Table 2:

[0029]

[0030] a=1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene

[0031] b=Triethylene glycol bis[3-(3-tert-butyl-5...

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PUM

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Abstract

The invention discloses a composite antioxidant for polyurethane fiber; the composite antioxidant takes 1, 3, 5-trimethyl-2, 4, 6-3 (3,5-di-tert-butyl-4-hydroxy benzyl) benzene as the main material, comprises one or two types of mixed pentaerythritol-4 (3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 3 (3,5-di-tert-butyl-4-hydroxy benzyl) isocyanurate and Beta-(3,5-di-tert-butyl-4-Hydroxy-phenyl) propionic acid ester 18 and is added into polyurethane to improve the thermal stability of the polyurethane; the composite antioxidant comprises the following components in ratio by weight: the ratio of the 1,3,5-trimethyl-2,4,6-3 (3,5-di-tert-butyl-4-hydroxy benzyl) benzene to the sum of the other component or to the other two components is: 1 to 90:99 to 10; and the addition is 0.01 to 5.0 percent of the weight of the polyurethane. The use of the composite antioxidant for polyurethane fiber can greatly improve the yellowing resistance and the thermal stability of the polyurethane fiber.

Description

technical field [0001] The invention belongs to organic antioxidants for polymers, in particular to a composite antioxidant used for polyurethane fibers to improve the thermal stability of polyurethane fibers. Background technique [0002] Polyurethane elastic fiber, also known as spandex, is a long-chain synthetic polymer; usually a polymer of ether polyol and diisocyanate. Although commercially available spandex has begun to have properties such as light resistance, heat resistance, oxidation resistance and exhaust gas resistance, there are still problems such as its unstable physical properties leading to yellowing and deterioration of mechanical properties. Many workers have used additives to improve the above problems, such as benzotriazole and hindered phenolic antioxidants in patent US3379675 to improve light resistance and yellowing, US3386942, US3573251 and US4548975 emphasize the combination of hindered phenolic antioxidants and organic phosphorus antioxidants. Ox...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K5/00C08K5/13C08K5/134C08K5/3492D01F6/94D01F1/10
Inventor 苏清镒李昆昌蔡茂德
Owner 迪比喜化学贸易(上海)有限公司
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