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Aluminum hypophosphite composite halogen-free flame retardant as well as preparation and application thereof

A compound halogen-free, aluminum hypophosphite technology, applied in the field of flame retardants, can solve the problems of limited flame retardant effect, fire, not paying attention to the thermal stability of aluminum hypophosphite, etc., to reduce dosage, reduce harm, and reduce heat release rate Effect

Active Publication Date: 2020-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above applications of aluminum hypophosphite have achieved good flame retardant effects, people have not paid attention to the problem of poor thermal stability of aluminum hypophosphite
During processing, especially when the processing temperature is higher than 130°C, it will decompose, release phosphine and cause spontaneous combustion, and the combustion will release a large amount of heat, which in turn will promote the further decomposition of aluminum hypophosphite, causing fire and explosion; at the same time, phosphine It is also a highly toxic gas, which will affect the health and safety of on-site operators; and, the VOC substance objects and management standards at home and abroad stipulate the phosphine release limit of product parts: 0.08ppm, which means that aluminum hypophosphite The amount used as a flame retardant is limited, and its flame retardant effect is also limited

Method used

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  • Aluminum hypophosphite composite halogen-free flame retardant as well as preparation and application thereof
  • Aluminum hypophosphite composite halogen-free flame retardant as well as preparation and application thereof
  • Aluminum hypophosphite composite halogen-free flame retardant as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0037] Preparation of aluminum hypophosphite composite halogen-free flame retardant:

[0038] Add 8 parts of melamine cyanurate to deionized water, and stir for 1 hour at 23° C. at a speed of 200 rpm to prepare a uniform solid content of 15% melamine cyanurate-deionized water dispersion;

[0039] Add 20 parts of aluminum hypophosphite to deionized water, and stir for 1 hour at 23° C. at a speed of 200 rpm to prepare a uniform solid content of 8% aluminum hypophosphite-deionized water dispersion;

[0040] Preparation of MIL-100(Fe)-dispersion:

[0041] S1: Heat the oven to 160°C, place the reaction kettle in the oven according to Fe, 1,3,5-BTC, HNO 3 , HF (39% V / V, hydrofluoric acid), H 2 The mol ratio of O four is 1:0.67:2:0.6:277, takes raw material in the autoclave of polytetrafluoroethylene lining, constant temperature reaction 10h;

[0042] S2: After the reaction in the previous step is complete, cool the reactor to 23°C and take out the mixture;

[0043]S3: First wash...

preparation example 2

[0047] The rest is the same as Preparation Example 1, except that 12 parts of melamine cyanurate is added to deionized water, stirred at 23° C. at a speed of 200 rpm for 1 h to prepare a uniform melamine cyanurate-deionized water with a solid content of 15%. Ionic water dispersion.

preparation example 3

[0049] The rest is the same as in Preparation Example 1, except that 25 parts of aluminum hypophosphite is added to deionized water, and stirred at 23° C. at a speed of 200 rpm for 1 h to prepare a uniform aluminum hypophosphite-deionized water dispersion with a solid content of 8%. .

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Abstract

The invention relates to an aluminum hypophosphite composite halogen-free flame retardant as well as preparation and application thereof, the flame retardant comprises the following raw materials: anorganic phosphorus-nitrogen flame retardant, MOFs and aluminum hypophosphite, the preparation method comprises the following steps: preparing three dispersions with different solid contents, mixing and drying to prepare the flame retardant, and the application of the flame retardant is flame retardant application in nylon materials. According to the invention, the organophosphorus-nitrogen flame retardant, MOFs and aluminum hypophosphite are utilized to prepare the aluminum hypophosphite composite halogen-free flame retardant; by adjusting the use amounts and proportions of the three components and fully exerting the synergistic effect of the three components, the prepared composite halogen-free flame retardant not only can reduce the use amount of aluminum hypophosphite and improve the flame retardant efficiency of aluminum hypophosphite, but also can inhibit and reduce the release of phosphine gas in the processing process and the product and reduce the harm of phosphine in the environment. According to the aluminum hypophosphite composite halogen-free flame retardant flame-retardant nylon prepared by the invention, the heat release rate of the nylon can be effectively reduced, the CO release amount is reduced, and the flame retardance of the flame-retardant nylon is improved.

Description

technical field [0001] The invention relates to the field of flame retardants, in particular to an aluminum hypophosphite composite halogen-free flame retardant, its preparation and its application. Background technique [0002] With the development of polymer material science, polymer materials are more and more widely used in people's daily production and life. However, the limiting oxygen index (LOI) of most polymer materials is lower than 25%, which is prone to fire, which poses a threat to the safety of users and property, and limits the application of polymer materials. Therefore, how to improve polymer materials The flame retardant ability of polymer materials has become an urgent problem to be solved by polymer materials researchers. [0003] Aluminum hypophosphite flame retardant is a new type of environmentally friendly halogen-free flame retardant. Compared with aluminum hydroxide and other inorganic additive flame retardants, it has a better flame retardant effe...

Claims

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Application Information

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IPC IPC(8): C08K5/3492C08K3/32C08L77/02C08L87/00
CPCC08K3/32C08K5/34928C08L77/02C08L2201/02C08L2201/22C08L87/00
Inventor 李向梅李雨洋彭治汉杨荣杰彭治权
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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