Phosphorus-nitrogen synergistic flame retardant compound as well as preparation method and application thereof

A technology of synergistic flame retardant and compound, applied in the field of flame retardant materials, can solve problems such as affecting the mechanical properties of epoxy resin, and achieve the effect of small mechanical properties, solving mechanical properties, and improving flame retardant properties

Inactive Publication Date: 2022-02-11
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing phosphorus-containing reactive flame retardants can affect the mechanical properties of epoxy resins, and provide phosphorus-nitrogen synergistic flame retardant compounds and their preparation methods and applications

Method used

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  • Phosphorus-nitrogen synergistic flame retardant compound as well as preparation method and application thereof
  • Phosphorus-nitrogen synergistic flame retardant compound as well as preparation method and application thereof
  • Phosphorus-nitrogen synergistic flame retardant compound as well as preparation method and application thereof

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specific Embodiment approach 1

[0020] Specific embodiment one: this embodiment is a phosphorus nitrogen synergistic flame retardant compound, and its structural formula is:

[0021]

specific Embodiment approach 2

[0022] Specific embodiment two: This embodiment is a method for preparing a phosphorus-nitrogen synergistic flame retardant compound, which is specifically completed in the following steps: firstly, dehydration and condensation of o-hydroxybenzaldehyde and p-phenylenediamine in absolute ethanol make an intermediate Imine SP, and then the intermediate imine SP and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in anhydrous ethanol to obtain phosphorus and nitrogen synergistic flame retardancy agent compound.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the operation process of the dehydration condensation is as follows: stirring and reacting at a temperature of 50-70°C for 3h-7h. Others are the same as in the second embodiment.

[0024] The dehydration condensation product obtained in this embodiment is firstly cooled naturally, then suction-filtered and washed with absolute ethanol in sequence, and then dried at a temperature of 60-80°C for 24 hours to obtain the intermediate product imine SP, which is sealed in bags for later use.

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Abstract

The invention discloses a phosphorus-nitrogen synergistic flame retardant compound as well as a preparation method and application thereof, belongs to the field of flame-retardant materials, and particularly relates to a phosphorus-nitrogen aromatic flame retardant as well as a preparation method and application thereof. The invention aims to solve the problem that the existing phosphorus-containing reactive flame retardant can influence the mechanical properties of epoxy resin. The structural formula of the phosphorus-nitrogen flame retardant compound is as shown in the specification. The preparation method comprises the following steps: carrying out dehydration condensation on o-hydroxybenzaldehyde and p-phenylenediamine to prepare an intermediate imine SP, and carrying out a phosphorus-hydrogen addition reaction on the intermediate imine SP and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain the phosphorus-nitrogen synergistic flame retardant compound. According to the application, the phosphorus-nitrogen synergistic flame retardant compound and epoxy resin raw materials are used for preparing flame-retardant epoxy resin, or the phosphorus-nitrogen synergistic flame retardant compound, epoxy resin and Al (OH) 3 raw materials are used for preparing Al (OH) 3 composite flame-retardant epoxy resin. The method is mainly used for preparing the phosphorus-nitrogen synergistic flame retardant compound and the flame-retardant epoxy resin.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, in particular to a phosphorus nitrogen aromatic flame retardant and its preparation method and application. Background technique [0002] Epoxy resin is easy to cure and form, has low curing shrinkage, stable performance, chemical corrosion resistance, and no low molecular volatiles. It is widely used in coatings, adhesives, structural composite materials and other fields. However, the limiting oxygen index (LOI) of epoxy resin is very low, it is a flammable material, and it will continue to burn after leaving the fire source, so the research on the flame retardancy of epoxy resin is imminent. Halogen-containing flame retardants are low in price and good in flame retardancy, but toxic and harmful gases will be released during combustion, which not only affects the atmospheric environment, but also endangers human health, such as dizziness, nausea, and even cancer. In order to build an env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6571C08K5/5313C08K3/22C08L63/02
CPCC07F9/6571C08K5/5313C08K3/22C08K2003/2227C08L2201/02C08L63/00
Inventor 丁明惠李笑甜程晓微王皓玄闫鹏伟庞绍志刘洪金张晨朱怀清
Owner HARBIN ENG UNIV
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