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Preparation method of environmentally-friendly phosphorous intumescent flame retardant

An intumescent flame retardant, phosphorus-based technology, applied in the field of flame retardant preparation, to achieve the effect of enhancing flame retardant, poor thermal conductivity, and slowing down the effect of thermal decomposition reaction

Inactive Publication Date: 2012-09-12
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional flame retardants used in tanning process include phosphorus-based, boron-based, bromine-based flame retardants, etc., which have the following disadvantages that are difficult to overcome: boron-based flame retardants Flame retardants are difficult to dissolve in water, and brominated flame retardants generally release a large amount of toxic gases, and have a large amount of smoke and poor thermal stability
Phosphorus-based flame retardants are relatively environmentally friendly. Intumescent flame retardants are welcomed by scientific researchers due to their high efficiency and environmental protection properties. However, the intumescent flame retardants currently on the market are mainly used in plastics, rubber, textiles and other fields, the compatibility with leather is poor, therefore, it is very urgent to prepare flame retardants that meet the characteristics of leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 0.3 mol (37.2g) of dimethyl methylphosphonate and 0.3 mol (29.4g) of phosphoric acid into the reaction system, stir and raise the temperature to 80°C, keep the temperature and stir for 3 hours, and make it fully react to obtain the product A;

[0021] (2) Add 0.3 mol (40.8 g) of pentaerythritol to the product A system, stir and react for 1 hour, and the temperature of the reaction system is 80°C to obtain product B;

[0022] (3) Add 0.3 mol (29.4 g) of maleic anhydride to the product B system, stir and react for 2 hours, and the temperature of the reaction system is 80 ℃ to obtain a colorless and transparent liquid C, which is a phosphorus-based intumescent flame retardant.

Embodiment 2

[0024] (1) Add 0.3 mol (37.2g) of dimethyl methyl phosphonate and 0.6 mol (58.8g) of phosphoric acid into the reaction system, stir and heat up to 120°C, keep it warm and stir for 3 hours to fully react, and obtain the product A;

[0025] (2) Add 0.6 mol (55.2g) of glycerin to the product A system, stir and react for 4 hours, and the temperature of the reaction system is 120°C to obtain product B;

[0026] (3) Add 0.9 mol (88.2 g) of maleic anhydride to the product B system, stir and react for 5 hours, and the temperature of the reaction system is 150 ℃ to obtain a colorless and transparent liquid C, which is a phosphorus-based intumescent flame retardant.

Embodiment 3

[0028] (1) Add 0.3 mol (37.2g) of dimethyl methylphosphonate and 0.3 mol (42.6g) of phosphorus pentoxide into the reaction system, stir and raise the temperature to 100°C, keep it warm and stir for 5h to make it fully react , Get product A;

[0029] (2) Add 0.6mol (80.4g) of trimethylolpropane to the product A system, stir and react for 2h, and the temperature of the reaction system is 100°C to obtain product B;

[0030] (3) Add 0.9 mol (91.8) of acetic anhydride to the product B system, stir and react for 4 hours, and the temperature of the reaction system is 120 ℃ to obtain a colorless and transparent liquid C, which is a phosphorous intumescent flame retardant.

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PUM

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Abstract

The invention discloses a preparation method of an environmentally-friendly phosphorous intumescent flame retardant. The preparation method comprises the following steps: adding dimethyl methylphosphonate and a phosphorylation reagent to a reaction system, fully reacting, adding a polyol, adding an acid anhydride, and reacting under stirring to obtain a colorless transparent liquid which is the phosphorous intumescent flame retardant. By the reaction of dimethyl methylphosphonate and the phosphorylation reagent, the content of phosphorus in the flame retardant is increased, so the flame retardation of the flame retardant is improved; the polyol is simultaneously adopted to modify obtained products, so the char formation performance of the intumescent flame retardant is increased; and the acid anhydride is also adopted to modify the products, so the compatibility of the products and polar substances is increased, thereby the flame retardant can be applied to the textile field, the synthetic leather field, the natural leather field, the papermaking field and the like.

Description

[0001] technical field [0002] The invention relates to a preparation method of a flame retardant, in particular to a preparation method of an environmentally friendly phosphorus-based intumescent flame retardant. The environmentally friendly phosphorus-based intumescent flame retardant is mainly used as a flame-retardant additive in the manufacture of natural leather. technical background [0003] With the improvement of people's living standards, leather products, as a kind of special daily necessities, are widely used, from the initial wearing to high-end consumption, such as interior decoration, office furniture, transportation (such as airplanes, trains, Automobile) interior decoration and cushions, fire fighting clothing and other fields are closely related to people's lives and properties. With the popularization of natural leather in car seat cushions, sofas, protective clothing and other fields, fires caused by burning leather are becoming more and more frequent....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/12C14C3/08
Inventor 段宝荣王全杰
Owner YANTAI UNIV
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