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Polymerization type phosphorus-containing flame retardant as well as preparation method and application thereof as epoxy resin flame retardant

A phosphorus flame retardant, polymeric technology, applied in the field of polymeric phosphorus-containing flame retardants and their preparation and application as epoxy resin flame retardants, can solve the problems of low thermal stability, easy hydrolysis, difficult processing, etc. , to achieve good compatibility, short reaction time and good thermal stability

Inactive Publication Date: 2015-01-28
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low thermal stability, easy hydrolysis and difficult processing of existing phosphorus-containing flame retardants, and provide polymeric phosphorus-containing flame retardants and their preparation methods and as epoxy resin flame retardants. application

Method used

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  • Polymerization type phosphorus-containing flame retardant as well as preparation method and application thereof as epoxy resin flame retardant
  • Polymerization type phosphorus-containing flame retardant as well as preparation method and application thereof as epoxy resin flame retardant
  • Polymerization type phosphorus-containing flame retardant as well as preparation method and application thereof as epoxy resin flame retardant

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specific Embodiment approach 1

[0030] Specific implementation mode 1: This implementation mode is a polymeric phosphorus-containing flame retardant, and its general structural formula is:

[0031]

specific Embodiment approach 2

[0032] Specific embodiment two: This embodiment is a preparation method of a polymeric phosphorus-containing flame retardant, specifically prepared according to the following steps:

[0033] Adopt water as reaction solvent, take trihydroxymethyl phosphorus oxide aqueous solution as starting material, use phosphoric acid or sulfuric acid as catalyst, add trihydroxymethyl phosphorus oxide aqueous solution, reaction solvent and catalyzer in the reaction vessel at room temperature, then in Add melamine at room temperature, then adjust the pH value to 4-6, stir evenly at a stirring speed of 300r / min-400r / min, and then at a stirring speed of 300r / min-400r / min at a heating rate of 5°C / min from Raise the temperature from room temperature to 85°C-95°C, react at a temperature of 85°C-95°C for 10min-15min, and then raise the temperature from 85°C-95°C to the reflux temperature of the reaction solvent at a temperature of 2°C / min at a temperature increase rate of 2°C / min. The reaction was ...

specific Embodiment approach 3

[0036] Specific embodiment three: This embodiment is a polymeric phosphorus-containing flame retardant, and its general structural formula is:

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Abstract

The invention discloses a polymerization type phosphorus-containing flame retardant as well as a preparation method and application thereof as an epoxy resin flame retardant, relates to a hydrolysis-resisting phosphorus-containing flame retardant and a preparation method thereof, and solves the problems that a conventional phosphorus-containing flame retardant is low in thermal stability, easy to hydrolyte and hard to process. The structural formula of the phosphorus-containing flame retardant is as shown in the specification. The preparation method comprises the following steps: by taking phosphoric acid or sulfuric acid as a catalyst, adding a trisphosphine oxide solution or a tertphosphine oxide solution, a reaction solvent and an additive into a reaction container, adding a melamine or amine compound at the room temperature, adjusting the pH value, heating at a certain stirring speed, reacting at certain temperature, performing backflow reaction, cooling to be the room temperature, sequentially performing suction filtration, washing in water and drying, thereby obtaining white powder solid, that is, the polymerization type phosphorus-containing flame retardant. The polymerized type phosphorus-containing flame retardant can be used as the epoxy resin flame retardant which is added into epoxy resin.

Description

technical field [0001] The invention relates to a hydrolysis-resistant phosphorus-containing flame retardant, a preparation method thereof and an application as an epoxy resin flame retardant. Background technique [0002] Polymer materials have excellent comprehensive properties and are widely used in aerospace, electronic appliances, automobile industry and other fields, but the flammability of polymer materials and the hazards of burning and releasing toxic gases hinder their wider application. Flame retardants are a class of functional additives that can impart flame retardancy to polymer materials. Halogenated flame retardants, especially bromine-containing flame retardants, have been widely used due to their high flame retardant efficiency and low price. However, when halogenated flame retardants are thermally cracked or burned, they will generate a lot of smoke and corrosive toxic gases, such as: polybrominated dibenzofurans, dioxins, etc. Based on the requirements of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/53C08L85/02C07F9/6587C07F9/6521C08L63/00
Inventor 许苗军李斌
Owner NORTHEAST FORESTRY UNIVERSITY
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