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A kind of preparation method and application of phosphorus-nitrogen synergistic flame retardant polymer polyol

A technology of synergistic flame retardant and polymer, which is applied in the preparation of phosphorus-nitrogen synergistic flame retardant polymer polyol and the application field of polyurethane foam synthesis, which can solve the problems of uneven distribution of flame retardants, poor flame retardant effect and easy loss. , to achieve the effect of good flame retardant effect, overcoming easy sedimentation and low smoke emission

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that the polyurethane foam is easy to burn, and the additive flame retardant is unevenly distributed, easy to lose, and has poor flame retardant effect, the invention provides a method for preparing a phosphorus-nitrogen synergistic flame-retardant polymer polyol , the prepared flame retardant polymer polyol has high solid content, low viscosity, high phosphorus and nitrogen content, and the polyurethane foam prepared with flame retardant polymer polyol has good flame retardant effect

Method used

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  • A kind of preparation method and application of phosphorus-nitrogen synergistic flame retardant polymer polyol

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Effect test

Embodiment 1

[0036]Under a nitrogen atmosphere, 115.8g of hexachlorocyclotriphosphazene was dissolved in 579g of tetrahydrofuran, 201g of triethylamine and 78g of n-propylamine were added to the above solution, and the reaction was carried out at -50°C for 10h; then 40g of ethylenediamine was added Into the solution, react at 50°C for 10h, finally filter to obtain a colorless and transparent solution, and distill at high temperature to obtain a white solid phosphazene compound.

[0037] 157g of phosphazene compound and 43g of terephthalaldehyde were added to 800g of polyether polyol 1, and the reaction was carried out at 80 °C for 5 hours; then the pressure was -0.098MPa~-0.08MPa, and the temperature was 110 °C under the conditions of vacuum removal Residual monomers were used to obtain a phosphorus-nitrogen synergistic flame retardant polymer polyol with a viscosity of 1953 mP·s / 25°C.

Embodiment 2

[0039] Under a nitrogen atmosphere, 156.7g of hexachlorocyclotriphosphazene was dissolved in 784g of dioxane, 213g of pyridine and 98g of n-butylamine were added to the above solution, and the reaction was performed at -20°C for 5h; then 100g of 1, 3-Propanediamine was added to the solution, reacted at 30 °C for 20 h, and finally filtered to obtain a colorless and transparent solution, which was distilled at high temperature to obtain a white solid phosphazene compound.

[0040] 231g of phosphazene compound and 69g of adipaldehyde were added to 700g of polyether polyol 1, and the reaction was carried out at 100 °C for 3 hours; then the pressure was -0.098MPa~-0.08MPa, and the temperature was 110 °C under the conditions of vacuum to remove the residual Monomer to obtain a phosphorus-nitrogen synergistic flame retardant polymer polyol with a viscosity of 2371 mP·s / 25°C.

Embodiment 3

[0042] Under a nitrogen atmosphere, 245.5g of hexachlorocyclotriphosphazene was dissolved in 1227g of acetone, 427.5g of triethylamine and 127g of dimethylamine were added to the above solution, and reacted at -10°C for 4h; then 124g of 1, 4-Butanediamine was added to the solution, reacted at 50°C for 10 hours, and finally filtered to obtain a colorless and transparent solution, which was distilled at high temperature to obtain a white solid phosphazene compound.

[0043] 332g of phosphazene compound and 68g of glutaraldehyde were added to 600g of polyether polyol 2, and the reaction was carried out at 50 °C for 10 h; then the residual pressure was removed by vacuuming under the conditions of -0.098MPa ~ -0.08MPa and temperature of 120 °C. Monomers were used to obtain a phosphorus-nitrogen synergistic flame retardant polymer polyol with a viscosity of 5830 mP·s / 25°C.

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Abstract

The invention relates to a preparation method and application of a phosphorus-nitrogen synergistic flame retardant polymer polyol. The specific synthesis steps are as follows: in a nitrogen atmosphere, hexachlorocyclotriphosphazene is dissolved in an organic solvent, an acid binding agent and a unit amine are added, after a period of reaction, the diamine is added to the solution, then the reaction is heated up and filtered. A colorless and transparent solution is obtained, and the phosphazene compound in white solid state is obtained by distillation at high temperature; the phosphazene compound and polyaldehyde are added to the polyether polyol, and after reacting at high temperature for a period of time, the residual polyaldehyde is removed to obtain milky white polymerization polyols. The flame retardant polymer polyol prepared by the invention has high solid content, low viscosity, high phosphorus and nitrogen content, and the polyurethane foam prepared by the flame retardant polymer polyol has a good flame retardant effect, an oxygen index of about 30%, and a Smoke is low.

Description

technical field [0001] The invention belongs to the field of polyurethane synthetic materials, in particular to a preparation method of a phosphorus-nitrogen synergistic flame retardant polymer polyol and its application in the synthesis of polyurethane foam. Background technique [0002] Polyurethane foam is widely used in automobiles, ships, airplanes, furniture and other fields. However, due to the low oxygen index of polyurethane foam, it is easy to burn and releases a large amount of toxic gas, which brings great harm to people's life and property safety. A kind of polyurethane foam material with flame retardant function is of great significance. [0003] At present, the commonly used flame retardant method is to introduce elements with flame retardant functions such as phosphorus, nitrogen and halogen into the raw material polyether polyol of polyurethane foam, which are mainly divided into two types: additive type and reactive type. The additive type is to directly a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08G18/64C08G18/48C08G101/00
CPCC08G81/00C08G18/6461C08G18/48C08G18/81C08G2101/00
Inventor 姜明秦承群李付国刘洋刘佳奇隋美玉李传亮
Owner WANHUA CHEM GRP CO LTD
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