Macromolecular expansion type flame retardant containing hindered amine structure and preparation method and application of macromolecular expansion type flame retardant

A technology of intumescent flame retardants and hindered amines, which is applied in the preparation and application of halogen-free flame retardants, can solve the problems of easy migration, poor thermal stability, and poor compatibility of small molecule intumescent flame retardants, and achieve production High efficiency, improved weather resistance, and easy control

Active Publication Date: 2014-12-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a single-component macromolecule intumescent flame retardant containing a hindered amine structure, which can effectively overcome the disadvantages of small m...

Method used

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  • Macromolecular expansion type flame retardant containing hindered amine structure and preparation method and application of macromolecular expansion type flame retardant
  • Macromolecular expansion type flame retardant containing hindered amine structure and preparation method and application of macromolecular expansion type flame retardant
  • Macromolecular expansion type flame retardant containing hindered amine structure and preparation method and application of macromolecular expansion type flame retardant

Examples

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Effect test

Embodiment 1

[0044] 1) Synthesis of a substituted hindered amine triazine compound: Add 250 mL of toluene and 36.88 g (0.2 mol) of cyanuric chloride into a 500 ml four-neck flask under ice bath conditions at 0°C to 5°C, and stir at a constant speed for 30 minutes; g (0.2mol) 2,2,6,6-tetramethylpiperidinamine was dissolved in 50mL of toluene, and was added dropwise to the reaction kettle within 3 hours, while slowly adding a 20wt% sodium hydroxide aqueous solution, the dropwise After the reaction for 3 hours; after the reaction, the mixture was concentrated, filtered, washed with deionized water and ethanol successively, and then dried to obtain a substituted hindered amine triazine compound.

[0045] 2) Synthesis of a single-component macromolecule intumescent flame retardant containing a hindered amine structure: add 300 mL of dioxane and 45.62 g (0.15 mol) of a substituted hindered amine triazine compound into a 500 mL four-neck flask, and heat up to 55 °C (oil bath), stir at a constant ...

Embodiment 2

[0050] The differences between this example and Example 1 are: the amount of polypropylene in step 3) is changed to 75wt%, and the amount of one-component macromolecule intumescent flame retardant containing hindered amine structure is changed to 25wt%. Wherein the n in the structural formula is 20, and the molecular weight is 10000

[0051] The test results of flame retardancy, mechanical properties, water resistance and weather resistance are shown in Table 1 and Table 2.

Embodiment 3

[0053] The differences between this example and Example 1 are: the amount of polypropylene in step 3) is changed to 70wt%, and the amount of one-component macromolecular intumescent flame retardant containing hindered amine structure is changed to 30wt%. Wherein the n in the structural formula is 20, and the molecular weight is 10000

[0054] The test results of flame retardancy, mechanical properties, water resistance and weather resistance are shown in Table 1 and Table 2.

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Abstract

The invention discloses a macromolecular expansion type flame retardant containing a hindered amine structure and a preparation method and application of the macromolecular expansion type flame retardant. The preparation method comprises the following steps: preparing a substituted hindered amine triazine compound through nucleophilic substitution between a hindered amine monomer and cyanuric chloride under the condition of -5 DEG C to 10 DEG C; reacting the substituted hindered amine triazine compound with phosphorodiamidate and the like in sequence respectively under the conditions of 40 DEG C to 60 DEG C and 90 to 120 DEG C; and finally preparing the macromolecular expansion type flame retardant containing the hindered amine structure, and applying the macromolecular expansion type flame retardant to flame retardant modification of a polymer. Compared with the prior art, the macromolecular expansion type flame retardant prepared by the method has excellent heat stability, charring property and water-proof property, polypropylene can be endowed with good flame retardant property and weatherability after a little of flame retardant is added, and the prepared flame retardant polypropylene material can be widely applied to the fields such as automobile exteriors, furniture and appliances, electric wires, building materials and the like.

Description

technical field [0001] The invention belongs to the field of preparation and application of halogen-free flame retardants, in particular to a single-component macromolecule expansion type flame retardant containing hindered amine structure and its preparation method and application. Background technique [0002] Intumescent flame retardants (IFRs) are considered to be one of the most promising green flame retardants in the field of polymer flame retardants because of their advantages such as low smoke, low toxicity, and droplet suppression. Among the existing IFR systems, ammonium polyphosphate / pentaerythritol (APP / PER) is the most commonly used. When APP / PER is added to the polymer, it can play a good role in flame retardancy, smoke suppression and anti-droplet. However, PER is a polar small molecule, which has poor compatibility with the matrix, is easy to migrate, and is easy to absorb moisture; the thermal stability of the APP / PER system is poor, the flame retardant eff...

Claims

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Application Information

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IPC IPC(8): C08G73/06C08L23/12C08L79/04
Inventor 赖学军谢华理曾幸荣李红强周日敏张亚军邱杰东
Owner SOUTH CHINA UNIV OF TECH
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