Preparation methods for hyperbranched polyester based phosphorus-nitrogen type flame retardant and flame-retardant fabrics

A technology of hyperbranched polyester and flame retardant, which can be used in flame retardant fibers, plant fibers, textiles and paper making, etc., can solve problems such as residues and life safety threats, achieve low cost, simple preparation process, and realize industrialized production. Effect

Active Publication Date: 2019-07-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, it was first discovered that halogen-containing flame retardants have a good flame-retardant effect, but when burning, halogen-containing flame-retardant materials tend to emit irritating and corrosive hydrogen halide gas. When some halogen-containing flame-retardant systems are cracked at high temperature When burned, toxic polybrominated compounds are produced, which pose a serious threat to life safety; another example is THPC and Pyrovatex CP, the two most common flame retardants on the market, which can form covalent bonds with fibers and have excellent Flame retardancy and durability, but these two finishing methods have the problem of formaldehyde residue and subsequent formaldehyde release, so the halogenation and formaldehyde-free of flame-retardant materials are getting more and more attention

Method used

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  • Preparation methods for hyperbranched polyester based phosphorus-nitrogen type flame retardant and flame-retardant fabrics
  • Preparation methods for hyperbranched polyester based phosphorus-nitrogen type flame retardant and flame-retardant fabrics
  • Preparation methods for hyperbranched polyester based phosphorus-nitrogen type flame retardant and flame-retardant fabrics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a phosphorus and nitrogen type green durable flame retardant and flame-retardant fabric of hyperbranched polyester, and the specific preparation steps are as follows:

[0030] Step 1: Dissolve 1.0 g of hyperbranched polyester (Boltorn H20 of Seebio) in 49 g of deionized water to make a 2 wt % hyperbranched polyester solution; add 0.8 g of phosphorous acid, the mole of hyperbranched polyester and phosphorous acid The ratio is 1:16, keep stirring, react in a water bath at 70°C for 4 hours, use a dialysis membrane with a molecular weight cut-off of 2000 for dialysis, change the water at 0.5h, 1h, 2h, 4h, 8h, and 12h, and separate and purify Go out phosphorus-containing hyperbranched polyester, dry in the vacuum oven of 50 ℃ for subsequent use;

[0031] Step 2: Dissolve 1.0g of phosphorus-containing hyperbranched polyester in deionized water, add 0.6g of urea, the molar ratio of phosphorus-containing hyperbranched polyester to urea is 1:16, condense...

Embodiment 2

[0035] This embodiment provides a phosphorus and nitrogen type green durable flame retardant and flame-retardant fabric of hyperbranched polyester, and the specific preparation steps are as follows:

[0036] Step 1: Dissolve 1.0 g of hyperbranched polyester (Boltorn H20 of Seebio) in 49 g of deionized water to make a 2 wt % hyperbranched polyester solution; add 0.8 g of phosphorous acid, the mole of hyperbranched polyester and phosphorous acid The ratio is 1:16, keep stirring, react in a water bath at 80°C for 4 hours, use a dialysis membrane with a molecular weight cut-off of 2000 for dialysis, change the water at 0.5h, 1h, 2h, 4h, 8h, and 12h, and separate and purify Go out phosphorus-containing hyperbranched polyester, dry in the vacuum oven of 50 ℃ for subsequent use;

[0037] Step 2: Dissolve 1.0g of phosphorus-containing hyperbranched polyester in deionized water, add 0.6g of urea, the molar ratio of phosphorus-containing hyperbranched polyester to urea is 1:16, condense...

Embodiment 3

[0041] This embodiment provides a phosphorus and nitrogen type green durable flame retardant and flame-retardant fabric of hyperbranched polyester, and the specific preparation steps are as follows:

[0042] Step 1: Dissolve 1.0 g of hyperbranched polyester (Boltorn H20 of Seebio) in 49 g of deionized water to make a 2 wt % hyperbranched polyester solution; add 0.8 g of phosphorous acid, the mole of hyperbranched polyester and phosphorous acid The ratio is 1:16, keep stirring, react in a water bath at 80°C for 1 hour, use a dialysis membrane with a molecular weight cut-off of 2000 for dialysis, change the water at 0.5 hours, 1 hour, 2 hours, 4 hours, 8 hours, and 12 hours, separate and purify Go out phosphorus-containing hyperbranched polyester, dry in the vacuum oven of 50 ℃ for subsequent use;

[0043] Step 2: Dissolve 1.0g of phosphorus-containing hyperbranched polyester in deionized water, add 0.6g of urea, the molar ratio of phosphorus-containing hyperbranched polyester t...

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Abstract

The invention provides a preparation method for a hyperbranched polyester based phosphorus-nitrogen type flame retardant. The method is characterized by comprising the following steps: (1) dissolvinghyperbranched polyester into deionized water to prepare a hyperbranched polyester solution; and adding orthophosphorous acid, carrying out sustained stirring, carrying out a reaction under water-bathconditions, then, carrying out separation and purification to prepare phosphorus-containing hyperbranched polyester, and carrying out baking in a vacuum baking oven for later use; and (2) dissolving the phosphorus-containing hyperbranched polyester into deionized water, adding urea, carrying out a reaction under condensation reflux conditions, and then, carrying out separation and purification toobtain phosphorus-nitrogen containing hyperbranched polyester, namely the hyperbranched polyester based phosphorus-nitrogen type flame retardant. Then, flame-retardant cotton fabrics are produced in apadding and baking manner. According to the flame-retardant finishing agent provided by the invention, raw materials and a process flow are friendly to environments and human bodies, no formaldehydeis released in both a flame-retardant finishing process of the cotton fabrics and a use process of the flame-retardant fabrics, and the cotton fabrics have excellent washing resistance while efficientflame retardance is obtained.

Description

technical field [0001] The invention relates to the technical field of flame-retardant finishing of textiles, in particular to a cotton fabric flame-retardant finishing method based on hyperbranched polyester derivatives. Background technique [0002] The application of textiles has penetrated into every aspect of science and technology and life, but while textiles are widely used, the threat to people's life and property safety is gradually expanding. Statistics show that in recent years, fire accidents caused by textile burning account for about half of the world's total fire accidents. A large part of textiles have no flame retardant effect and are easy to burn. Therefore, through the flame retardant finishing of textiles, the flame retardant performance of textiles can be improved, the harm caused by burning can be reduced, and the loss of people's lives and property has been reduced, which has attracted worldwide attention. . [0003] Although cotton fabric has excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91D06M15/507D06M101/06
CPCC08G63/91D06M15/507D06M2101/06D06M2200/30
Inventor 凌超郭腊梅季梁戴传彪纪新颖费小妹
Owner DONGHUA UNIV
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