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Halogen-free expansion type flame-retardant and preparation thereof

A flame-retardant polypropylene composition technology, applied in the field of halogen-free intumescent flame-retardant polypropylene composition and its preparation, can solve the problems of dioxin, trouble, a large amount of smoke and corrosive gas, etc., and achieve flame retardancy Good, good toughness, environment-friendly effect

Active Publication Date: 2009-01-28
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has fatal shortcomings. The flame retardant materials will generate a lot of smoke and corrosive gases when they are hot cracked and burned, and there are also problems of dioxin, which makes the application prospects of halogen flame retardants cast a shadow

Method used

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  • Halogen-free expansion type flame-retardant and preparation thereof
  • Halogen-free expansion type flame-retardant and preparation thereof
  • Halogen-free expansion type flame-retardant and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This example is a preparation example of a halogen-free macromolecular char-forming flame retardant.

[0030] Add 46.1g of cyanuric chloride in the 500ml reaction flask equipped with reflux condenser, constant pressure dropping funnel, stirrer and thermometer, then add 10ml acetone and 10ml distilled water, fully stir, cyanuric chloride is dispersed evenly, Then, under the condition of -5~5℃, 15.3g of ethanolamine and NaOH solution (10gNaOH dissolved in 25ml of distilled water) were evenly added dropwise while stirring. Hour. Then raise the temperature to room temperature, then evenly add 9.25g1,3-propanediamine and NaOH solution dropwise in the reaction flask (10gNaOH is dissolved in 25ml distilled water), raise the reaction temperature to 40~65°C after the dropwise addition, Under these conditions, the reaction was stirred for 4 to 6 hours. Then, under the condition of 40-65°C, continue to evenly add 9.25g of 1,3-propylenediamine and NaOH solution (10gNaOH dissolved...

Embodiment 2-14 and comparative example 1-3

[0032] This group of examples is a preparation example of the halogen-free intumescent flame-retardant polypropylene composition of the present invention.

[0033] According to the data listed in Table 1 (1) the inorganic rigid particles, coupling agent, and compatibilizer are first subjected to high-speed stirring; (2) the coated ammonium polyphosphate, melamine and its derivatives, and halogen-free macromolecules are formed Charcoal flame retardant is carried out jet pulverization, carries out high-speed agitation and mixing again; (3) then polypropylene, flame retardant synergist, toughening agent, antioxidant, step (1) and (2) processed inorganic rigidity The particles and the obtained halogen-free intumescent flame retardant are mixed at high speed, and then subjected to twin-screw extrusion and granulation to obtain the halogen-free intumescent flame-retardant polypropylene composition. Injection molding sample preparation, test performance, the results are also shown in...

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Abstract

The invention relates to a halogen-free intumescent flame-retardant polypropylene composite and a preparation method thereof. Calculated by weight percentage, the composite comprises 35 to 80 percent of polypropylene, 5 to 30 percent of coated poly-ammonium phosphate, 1 to 20 percent of melamine and the derivatives, 1 to 15 percent of halogen-free macromolecular char forming flame retardant, 0.1 to 5 percent of flame retardant synergist, 1 to 20 percent of rigid inorganic particle, 0.05 to 5 percent of coupling agent, 0.1 to 10 percent of compatilizer, 1 to 20 percent of toughening agent and 0.01 to 4 percent of antioxidant. Compared with the prior art, the material of the invention has good toughness, high strength and environment-protecting flame retardance, and the composite can be widely applied in the fields such as automobile and electronic appliances.

Description

Technical field [0001] The invention belongs to the technical field of polymer modification, and in particular relates to a halogen-free expanded flame-retardant polypropylene composition and a preparation method thereof. Background technology [0002] As a general plastic, polypropylene has good processability and mechanical properties and is used in various aspects. However, polypropylene also has shortcomings such as poor toughness, insufficient high-temperature strength and stiffness, and flammability, which greatly limits its application. Therefore, research on high-performance modification of polypropylene to break through traditional applications and expand its application fields has always been a focus of research by academics and marketers. [0003] There have been many patents and articles on the toughness and strength modification of polypropylene at home and abroad, and there are also many corresponding modified products of polypropylene on the market. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L79/04C08K13/06C08K9/10C08K5/3492C08K3/22C08K3/38C08K3/36C08K3/34B29B7/00B29B9/06B29K23/00
Inventor 郝冬梅刘彦明王履新陈崇伟李旭尹亮陈涛林倬仕
Owner SHANGHAI RES INST OF CHEM IND
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