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A reactive stabilizer with dual functions of antioxidant and anti-yellowing agent for spandex

An anti-oxidant and anti-yellowing agent technology, applied in the direction of one-component polyurethane artificial filament, etc., can solve the problems of reduced performance and achieve the effect of small addition, simple structure and excellent efficacy

Active Publication Date: 2018-01-30
RIANLON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the molecular weight of the compound has been greatly improved, it overcomes the thermal volatilization loss at high temperature after being used in spandex and the use of DMAC strong polar solvent in the production of spandex to prevent oxidation or anti-yellowing agents from spandex filaments. The performance reduction caused by extraction

Method used

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  • A reactive stabilizer with dual functions of antioxidant and anti-yellowing agent for spandex
  • A reactive stabilizer with dual functions of antioxidant and anti-yellowing agent for spandex
  • A reactive stabilizer with dual functions of antioxidant and anti-yellowing agent for spandex

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Mix 1mol polyether polyol (PTMEG, molecular weight 2000±100) with 2mol diphenylmethane diisocyanate (MDI), prepolymerize at 80-90°C, cool the prepolymer to 52-55°C, add N,N-dimethylacetamide (DMAC) becomes a solution with a solid content of 45%, then adds ethylenediamine and cyclohexanediamine as a chain extender, and then adds 0.2% or 0.5% (relative to the polyurethane resin weight % ) containing DMAC solution of structural formula 1 stabilizer 3,5-di-tert-butyl-4-hydroxyphenylpropionohydrazide 20% (% by weight) of the present invention, reacted for 10-15min, and ended with diethylamine as an end-capping agent Polymerization. The DMAC solution of the obtained polyurethane contains about 32% of the polyurethane resin.

[0039] The viscous liquid is coated on a flat glass to form a film. The resulting film 1# and film 2# were subjected to thermo-oxidative aging in an oven at 100°C for 10 days, placed indoors for 60 days, and tested for ΔE values ​​in the NOx test for 1...

example 2

[0041] Carry out the same operation as example 1, only the stabilizer of structural formula 1 of the present invention is replaced with the stabilizer 3-methyl-5-tert-butyl-4-hydroxyphenylpropionylhydrazide of structural formula 2 of the present invention, so as to contain 30 % (weight %) 3-methyl-5-tert-butyl-4-hydroxyphenylpropionohydrazide was added in the form of DMAC solution, and the addition amount was 0.2% or 0.4% (relative to the polyurethane resin weight %) to obtain film 3 #和film4#.

[0042] As in Example 1, the ΔE value was measured in a 100°C oven for 10 days by thermo-oxidative aging, placed indoors for 60 days, and NOx test for 1 hr. The test results are listed in Table 2 below.

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Abstract

The invention discloses a reactive stabilizing agent used for spandex and having the dual functions as an anti-oxidant and an anti-yellowing agent. The stabilizing agent is 3,5-di-t-butyl-4-(hydroxyphenyl)propanohydrazide or 3-methyl-5-di-t-butyl-4-(hydroxyphenyl)propanohydrazide; and the addition amount of the stabilizing agent is 0.2 to 0.5% of the weight of polyurethane. In the production process of spandex, after prepolymerization of polyether polyol and diphenylmethane diisocyanate and chain growth with ethene diamine and cyclohexanediamine as chain growing agents, 3,5-di-t-butyl-4-(hydroxyphenyl)propanohydrazide or 3-methyl-5-di-t-butyl-4-(hydroxyphenyl)propanohydrazide are added; and then, diethylamine is used as an end-capping reagent to terminate polymerization. The reactive stabilizing agent provided by the invention can greatly improve yellowing resistance, NOx resistance and thermal stability of the spandex.

Description

technical field [0001] The invention relates to a reactive spandex stabilizer which is used for spandex and has dual functions of antioxidant and anti-yellowing agent. Specifically, it is to provide a reactive functional additive that reacts with the spandex structure to resist heat, oxygen aging, and yellowing, so as to economically achieve continuous and efficient heat, oxygen, aging, NOx yellowing and yellowing resistance of spandex. Indoor yellowing, and easier to prepare. Background technique [0002] Spandex is a polyurethane elastic fiber with high elongation at break, low modulus and high elastic recovery rate. At present, it is a functional chemical fiber widely used in various textiles and clothing fabrics, especially in high-end clothing fabrics. (Lun) cannot be made into cloth". [0003] At present, the most important production process of spandex is dry spinning, and a small part is melt spinning. The production process of dry spinning is generally to form a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/70C08G18/38
CPCC08G18/3834D01F6/70
Inventor 汤翠祥安平孙春光
Owner RIANLON
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