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Anion reacting water polyurethane flame-proof finishing agent and preparing method thereof

A technology of water-based polyurethane and flame retardant finishing agent, which is applied in the field of anionic reactive water-based polyurethane flame retardant finishing agent and its synthesis, can solve the problems of complex, difficult and difficult flame retardant of polyester/cotton, and achieve physical and mechanical properties. Small change and remarkable flame retardant effect

Inactive Publication Date: 2005-02-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The flame retardancy of polyester / cotton blended fabrics is a difficult problem in the world. Due to the "stent effect" of cotton, the flame retardancy of polyester / cotton becomes more complicated and difficult

Method used

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  • Anion reacting water polyurethane flame-proof finishing agent and preparing method thereof
  • Anion reacting water polyurethane flame-proof finishing agent and preparing method thereof
  • Anion reacting water polyurethane flame-proof finishing agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 1. In a 500ml four-neck flask, add 10g of polyoxypropylene triol, 20g of flame retardant polyol compound, add 5g of isophorone diisocyanate after vacuum dehydration, and react at 120°C for 5 hours under the protection of nitrogen to prepare Obtain polyurethane prepolymer, -NCO content 4.2%.

[0064] 2. In a 500ml four-neck flask, add 5g of methyl ethyl ketone, stir for 10 minutes, add 40ml of sodium bisulfite aqueous solution and 40ml of tert-butanol for emulsification, add hydrochloric acid after 1 hour, adjust the pH to 3~4, and the solid content is 35% .

Embodiment 2

[0066] 1. In a 500ml four-neck flask, add 9g of polyoxypropylene diol, 17g of flame retardant polyol compound, add 8g of hexamethylene diisocyanate (HDI) after vacuum dehydration, and react at 120°C under nitrogen protection After 6 hours, a polyurethane prepolymer was prepared with a -NCO content of 3.4%.

[0067] 2. In a 500ml four-necked flask, add 5g of acetone, stir for 10 minutes, add 40ml of sodium bisulfite aqueous solution and 50ml of isopropanol for emulsification, add hydrochloric acid after 1 hour, adjust the pH to 3~4, and the solid content is 35% .

Embodiment 3

[0069] 1. In a 500ml four-necked flask, add 15g of polyoxypropylene diol, 10g of flame retardant polyol compound, add 7g of xylene diisocyanate (TDI) after vacuum dehydration, and react at 80°C for 3 hours under nitrogen protection. A polyurethane prepolymer was obtained with a -NCO content of 5.2%.

[0070] 2. In a 500ml four-necked flask, add 4g of ethyl acetate, stir for 10 minutes, add 45ml of sodium bisulfite aqueous solution and 55ml of ethanol for emulsification, add hydrochloric acid after 1 hour, adjust the pH to 3~4, and the solid content is 33% .

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Abstract

The invention publishes a technical method of the ignition-prevented settlement of poly-amino ester with reactivity and water ability. It uses multi-prussic acid ester, multi-alcohol compound and ignition-prevented multi-alcohol compound to react and produces the pre-polymer of poly-amino ester whose end-radicals is isocyanate group. Then block the end and then emulsificate NaHSO4 liquid and one or more organic solvent. Finally, accommodate pH to 2-6 by acid and then obtain the production. The invention applies to use cotton fiber or nitrile fiber for ignition-prevented settlement. The fabric's igniting prevention affect is obious and its physic mechanical ability changes little. Moreover, it does not emit harmful substance like formaldehyde. In short, the invention is a green ecotype aid and has a vast foreground.

Description

technical field [0001] The invention relates to an anionic reactive waterborne polyurethane flame retardant finishing agent capped with sodium bisulfite and a synthesis method thereof. Background technique [0002] At present, the durable flame-retardant finishing agents used for cellulose fibers such as cotton, hemp, and viscose are mainly compounds containing phosphorus, nitrogen, and halogens, such as Proban, Pyrovatex, and Fyrol-76, which are commonly used for cotton. Since the way to obtain durability on cellulose fibers depends on the N-hydroxyl reaction system, especially to improve the durability of flame-retardant fabrics, it is necessary to add a large amount of cross-linking agent resin to increase the free formaldehyde content on the fabric. Therefore, the problem of free formaldehyde is inevitable. [0003] The flame retardant of synthetic fibers such as polyester, acrylic fiber, and vinylon can be divided into two types: flame retardant modification of raw sil...

Claims

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Application Information

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IPC IPC(8): D06M15/564
Inventor 王炜徐鹏陈水林
Owner DONGHUA UNIV
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