Three-source intumescent flame retardant, hybrid intumescent flame retardant grafted therewith, and their preparation and application

An intumescent flame retardant, an integrated technology, applied in the field of intumescent flame retardants, can solve the problems of the influence of polymer mechanical properties, high water solubility, poor polymer compatibility, etc.

Active Publication Date: 2021-09-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are not only few reports on the three-source intumescent flame retardant at present, but also in the limited reports, the three-source intumescent flame retardant still has high addition, low thermal stability, high water solubility and compatibility with polymers. gender issues
Such as CN107652324A has announced a kind of synthesis method and application of three sources in one, although it has been confirmed that the intumescent flame retardant of three sources in one has better flame retardant effect than the intumescent flame retardant formed by adding independently, but on the one hand the amount of addition It is still high and has a significant impact on the mechanical properties of polymers. On the other hand, its initial decomposition temperature is low, which is not suitable for the flame retardancy of most polymers. In addition, because its structure contains more ionic bonds, its water-soluble High resistance, resulting in flame retardants easy to absorb moisture and fail

Method used

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  • Three-source intumescent flame retardant, hybrid intumescent flame retardant grafted therewith, and their preparation and application
  • Three-source intumescent flame retardant, hybrid intumescent flame retardant grafted therewith, and their preparation and application
  • Three-source intumescent flame retardant, hybrid intumescent flame retardant grafted therewith, and their preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 1 mol of ethylenediamine and 2 mol of triethylamine into toluene and mix well, then add 1 mol of phosphorus oxychloride dropwise at 0°C with stirring, and heat to 70°C to continue the reaction for 6 hours; after the toluene is removed by rotary evaporation, Then add an aqueous solution containing 2 mol of pyridine, react at 100°C for 6 hours, cool down to 5°C to remove water by suction filtration, and wash with ethanol three times to obtain the three-source intumescent flame retardant FR-1.

Embodiment 2

[0060] Add 1 mol of ethylenediamine and 2 mol of triethylamine into acetonitrile and mix well, then add 1 mol of phosphorus oxychloride dropwise at 3°C ​​with stirring, and heat to 70°C to continue the reaction for 7 hours; after the acetonitrile is removed by rotary evaporation, add Ammonia solution containing 2 mol of ammonia reacted at 90°C for 12 hours, cooled to 5°C to remove water by suction filtration, and washed with ethanol three times to obtain the three-source intumescent flame retardant FR-2.

Embodiment 3

[0062] Add 1 mol of propylenediamine and 2 mol of triethylamine into toluene and mix well, then add 1 mol of phosphorus oxychloride dropwise at 2°C with stirring, and heat to 70°C to continue the reaction for 6 hours; after the toluene is removed by rotary evaporation, Then add ammonia solution containing 2 mol of ammonia, react at 90°C for 10h, cool down to 5°C to remove water by suction filtration, wash with ethanol three times to obtain the three-source intumescent flame retardant FR-3.

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Abstract

The invention discloses a three-source intumescent flame retardant, a hybrid intumescent flame retardant formed by grafting layered double hydroxide and their preparation method and application, wherein the three-source intumescent flame retardant The general structural formula of the hybrid intumescent flame retardant or its graft modification is as follows: the three-source intumescent flame retardant or hybrid intumescent flame retardant is used for thermoplastic elastomers, rubber, polyolefin plastics, Aliphatic polyesters, epoxy resins and unsaturated resins not only do not need to be compounded when they are flame retardant, but also have an appropriate proportion of phosphorus, nitrogen, and carbon elements, high flame retardant efficiency, and good char formation, which can greatly reduce the flame retardant. The addition amount reduces the cost, has less influence on the mechanical properties of the substrate, and has better water resistance and higher initial decomposition temperature.

Description

technical field [0001] The invention belongs to the technical field of a three-source intumescent flame retardant, a hybrid intumescent flame retardant and a polyurethane elastomer grafted with it, and their preparation technology, and specifically relates to a class of three-source intumescent flame retardant, The organic-inorganic hybrid expansion flame retardant formed by grafting layered double hydroxides and their preparation method and application. Background technique [0002] Thermoplastic polyurethane, abbreviated as TPU. The excellent comprehensive performance of TPU determines that it has a wide range of applications, and can be used in wire and cable, automobiles, construction, mining, mechanical devices, footwear products, medical and aerospace and other fields. However, like most polymer materials, TPU has flammable characteristics, burns rapidly and violently, and the flame spreads quickly. The combustion process releases a large amount of heat and toxic gase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/22C07F9/6509C08G79/02C08K9/06C08K3/22C08K7/00C08K9/04C08L75/04C08L23/16C08L23/12C08L67/04C08L63/00
Inventor 王玉忠黄胜超邓聪赵泽永陈宏高雨阳
Owner SICHUAN UNIV
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