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Synergistic flame retardant containing cardanol-based nitrogen and phosphorus, its preparation method and application

A synergistic flame-retardant, cardanol-based technology, which is applied in the field of polymer materials, can solve the problems of reduced flame retardancy of phenolic foam materials, achieve good flame retardancy, excellent mechanical properties, and save resources

Active Publication Date: 2020-06-12
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The toughener used in PF foam reduces the flame retardancy of phenolic foam due to the existence of flexible links

Method used

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  • Synergistic flame retardant containing cardanol-based nitrogen and phosphorus, its preparation method and application
  • Synergistic flame retardant containing cardanol-based nitrogen and phosphorus, its preparation method and application
  • Synergistic flame retardant containing cardanol-based nitrogen and phosphorus, its preparation method and application

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preparation example Construction

[0020] The invention provides a method for preparing the phenolic resin containing cardanol-based nitrogen-phosphorus synergistic flame retardant and the foam with simple preparation process, low cost and environmental protection. A method for preparing a phenolic resin containing cardanol-based nitrogen-phosphorus synergistic flame retardant and a foam. Cardanol is reacted with measured amine compounds and formaldehyde under a basic catalyst for a period of time at a certain temperature, and then washed with water, liquid separated, and vacuum distilled to remove small molecular substances to obtain nitrogen-containing cardanol. The substance is uniformly mixed with the phosphorus-containing compound, formaldehyde (same as above) and an organic solvent, and reacted at 25-120 DEG C for 0.5-24 hours to obtain the cardanol-based nitrogen-phosphorus synergistic flame retardant. The substance is evenly blended with curing agent, foaming agent, surfactant and other additives, poure...

Embodiment 1

[0032] Preparation of cardanol-based nitrogen and phosphorus synergistic flame retardant

[0033] Add a certain amount of cardanol, ethylenediamine, paraformaldehyde and NaOH (5% of cardanol quality) into the reactor, and the molar ratio of each component is n 腰果酚 :n 乙二胺 :n 甲醛 =1:3:3, the reaction temperature is 60°C, the reaction time is 3h, and then the small molecular substances are removed by water washing, liquid separation, and vacuum distillation to obtain the nitrogen-containing cardanol shown in the following formula 1. Add 100g of nitrogen-containing cardanol, 31.2g of paraformaldehyde and 114.4g of dimethyl phosphite obtained above into the reactor, react at a temperature of 80°C for 2h, wash with water and distill under reduced pressure to obtain the cashew nut shown in the following formula 2 Phenolic nitrogen and phosphorus synergistic flame retardants. According to the proton nuclear magnetic resonance spectrum of this nitrogen-containing cardanol, in 1H NMR ...

Embodiment 2

[0038] Preparation of cardanol-based nitrogen and phosphorus synergistic flame retardant

[0039] Add a certain amount of cardanol, propylenediamine, paraformaldehyde and KOH (3% of cardanol quality) into the reactor, and the molar ratio of each component is n 腰果酚 :n 丙二胺:n 甲醛 =1:3:3, the reaction temperature is 90°C, the reaction time is 2h, and then the small molecular substances are removed by water washing, liquid separation, and vacuum distillation to obtain the nitrogen-containing cardanol shown in the following formula 3. Add 100 g of the nitrogen-containing cardanol obtained above, 29 g of paraformaldehyde and 133.8 g of diethyl phosphite into the reactor, react at a temperature of 90° C. for 2 hours, wash with water and distill under reduced pressure to obtain the cardanol shown in the following formula 4 Nitrogen and phosphorus synergistic flame retardants. According to the hydrogen nuclear magnetic resonance spectrum of this nitrogen-containing cardanol, it can be...

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Abstract

The invention discloses an anacardol group-containing nitrogen and phosphorus synergistic flame retardant and a preparation method and an application. A series of anacardol group-containing nitrogen and phosphorus synergistic flame retardants are obtained by modifying anacardol for synthesizing phenolic resin containing the anacardol group-containing nitrogen and phosphorus synergistic flame retardants, and finally, the phenolic resin is blended and mixed uniformly with other auxiliary agents such as a curing agent, a foaming agent and a surfactant, is poured into a mold, and is cured at a certain temperature to obtain foam. Compared with existing pure phenolic foam, the phenolic foam containing the anacardol group-containing nitrogen and phosphorus synergistic flame retardants not only ismore excellent in flame retardance and mechanical property, but also has the double functions of saving sources and protecting the environment as the flame retardants use anacardol of a biomass source as a raw material.

Description

technical field [0001] The invention uses natural and renewable biomass cardanol to synthesize a cardanol-based nitrogen-phosphorus synergistic flame retardant, which is used to prepare phenolic resin and foam, and belongs to the technical field of polymer materials. Background technique [0002] Phenolic resin (PF) foam is widely used in building insulation materials, petrochemicals, transportation, plant cultivation and aerospace due to its low price, heat resistance, low thermal conductivity, ablation resistance, excellent flame retardancy, and less combustion smoke. It is one of the fastest-growing bubbles in recent years. However, due to its own molecular structure, PF has defects such as poor toughness and high crushing rate, which seriously limit its further application. Therefore, it is necessary to toughen the PF foam to overcome these shortcomings. The toughener used in PF foam reduces the flame retardancy of phenolic foam due to the existence of flexible joints....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/521C08K5/5313C08L61/06C08J9/14
CPCC08J9/141C08J2203/14C08J2361/06C08K5/521C08K5/5313C08L61/06
Inventor 周永红宋飞胡立红张猛贾普友薄采颖
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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