Phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and preparation method thereof

A polyurethane prepolymer and phenolic foam technology, which is applied in the field of biomass-based polyurethane prepolymer modified phenolic foam and its preparation, can solve the problems of low strength, poor toughness, and decreased flame retardancy of materials, and achieve low cost , Improve the effect of low elongation and high yield

Active Publication Date: 2016-06-15
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem to be solved: In order to solve the disadvantages of low strength and poor toughness of phenolic foamed plastics in the prior art, the invention provides a kind of phosphorus-containing cardanol-based polyurethane prepolymer modified phenolic foamed plastics and a preparation method thereof. The mechanical properties of phenolic foam have been significantly improved, and at the same time, the problem that the flame retardancy of the material has decreased due to the introduction of carbamate into phenolic foam has been improved

Method used

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  • Phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and preparation method thereof
  • Phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and preparation method thereof

Examples

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Embodiment 1

[0027] (1) Preparation of phosphorus-containing cardanol-based polyols: Add 26.4g of cardanol and 0.3g of anhydrous zinc chloride into the reaction flask, stir well and maintain the temperature at 90°C, add 11.7g of epichlorohydrin dropwise, After the addition is completed, react for 3 hours, then add 100 g of a 5% sodium hydroxide aqueous solution, heat up to 100° C., and react for 2 hours to obtain cardanol glycidyl ether; Hydrolyze at 100°C for 10 hours; extract the reactant with ether, wash with aqueous sodium bicarbonate, dry over anhydrous magnesium sulfate, distill off the ether to obtain 28.7g of cardanol-based diol; cardanol-based diol in 4.6g formic acid, 30g In the presence of hydrogen peroxide, react at 0°C for 24 hours, extract the reactant with ethyl acetate, wash with water, dry over anhydrous sodium sulfate, and evaporate the ethyl acetate to obtain 30.3 g of epoxy cardanol-based dihydric alcohol; epoxy cardanol Based dihydric alcohol and 5.6g DOPO were reacted...

Embodiment 2

[0033] (1) Preparation of phosphorus-containing cardanol-based polyols: Add 40g of cardanol and 0.6g of anhydrous aluminum chloride into the reaction flask, stir well and maintain the temperature at 98°C, add 24.61g of epichlorohydrin dropwise, and add After completion of the reaction for 3 hours, then add 100 g of a 10% sodium hydroxide aqueous solution in mass concentration, heat up to 100° C., and react for 2 hours to obtain cardanol glycidyl ether; Hydrolyze at ℃ for 15 hours, extract the reactant with ether, wash with aqueous sodium bicarbonate, dry over anhydrous magnesium sulfate, distill off the ether to obtain 49.10 g of cardanol-based diol; Under the condition of existence, reacted at 4°C for 20h, the reactant was extracted with dichloromethane, washed with water, dried over anhydrous sodium sulfate, and distilled off the dichloromethane to obtain 50.11g of epoxy cardanol-based dihydric alcohol; epoxy cardanol-based Dihydric alcohol and 6.4g of diethyl phosphate were...

Embodiment 3

[0039] (1) Preparation of phosphorus-containing cardanol-based polyols: Add 25g of cardanol and 0.2g of anhydrous zinc chloride into the reaction flask, stir well and maintain the temperature at 95°C, add 12.34g of epichlorohydrin dropwise, and add After completion of the reaction for 3 hours, then add 150 g of a 3% sodium hydroxide aqueous solution with a mass concentration, heat up to 100° C., and react for 4 hours to obtain cardanol glycidyl ether; Hydrolyze at ℃ for 10 hours, extract the reactant with ether, wash with aqueous sodium bicarbonate, dry over anhydrous magnesium sulfate, distill off the ether to obtain 28.12 g of cardanol-based diol; Under the condition of existence, react at 2°C for 24h, the reactant is extracted with chloroform, washed with water, dried over anhydrous sodium sulfate, and evaporated to remove chloroform to obtain 22.9g of epoxy cardanol-based diol; epoxy cardanol-based Dihydric alcohol and 4.3g DOPO were reacted at 140°C for 3 hours in the pre...

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Abstract

The invention relates to a phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam plastic and a preparation method thereof. The preparation method comprises the following steps: synthesizing cardanol glycidol ether from cardanol and epoxy chloropropane under alkaline conditions, and hydrolyzing under acidic conditions to generate cardanol-base dibasic alcohol; by using the cardanol-base dibasic alcohol as the raw material, dropwisely adding oxydol to react under acidic conditions to obtain the epoxy cardanol-base dibasic alcohol, carrying out reaction on the epoxy cardanol-base dibasic alcohol and a phosphorus-containing flame retardant to obtain phosphorus-containing cardanol-base polylol; carrying out reaction on the phosphorus-containing cardanol-base polylol and isocyanate to obtain a phosphorus-containing cardanol-base polyurethane prepolymer; and mixing the phosphorus-containing cardanol-base polyurethane prepolymer with a phenolic resin, and sequentially adding a surfactant, a foaming agent and a curing agent, thereby obtaining the phosphorus-containing cardanol-base polyurethane prepolymer modified phenolic foam thermal-insulation material. The mechanical properties of the phenolic foam thermal-insulation material are obviously enhanced. The flame-retardant element phosphorus is introduced into the polyurethane prepolymer, thereby solving the problem of degradation of foam flame retardancy due to the carbamate introduced into the phenolic foam.

Description

technical field [0001] The present invention relates to a kind of biomass-based polyurethane prepolymer modified phenolic foam and its preparation method, mainly relates to the preparation of phosphorus-containing biomass-based flame-retardant polyol, phosphorus-containing biomass-based polyurethane prepolymer and its application in phenolic foam in the application. Background technique [0002] Phenolic foam is a new type of foam developed in recent years. It has unique properties such as flame retardancy, low smoke, self-extinguishing, stable size, and does not release harmful gases when it is decomposed by fire. Its fire resistance performance is far superior to other foams. Plastic, its excellent performance has been highly valued by countries all over the world. With the mandatory implementation of building energy conservation by the Chinese government and the improvement of building energy conservation standards, phenolic foam will have broad market prospects. Phenol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/12C08J9/14
CPCC08G18/12C08G18/388C08G18/4833C08G18/6666C08G2101/00C08J9/141C08J2203/14C08J2375/08C08G18/542
Inventor 周永红薄采颖胡立红周静梁兵川
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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