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Preparation of biomass modified phenolic foam plastic

A phenolic foamed plastic and biomass technology is applied in the field of preparation of biomass lignin furfural modified phenolic foamed plastic thermal insulation materials, and can solve problems such as pollution

Inactive Publication Date: 2009-05-27
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

At present, due to people's increasing demand for environmental friendliness, due to the raw material variety and preparation technology used in phenolic foam plastics, the unreacted free phenol and free aldehyde cause serious pollution to the water and air in the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In 100 parts by mass of molten phenol, 5 parts by mass of aqueous alkali catalyst and 30 parts by mass of lignin are added, the aqueous alkali catalyst is an aqueous alkaline earth metal hydroxide, and the concentration by mass of the aqueous alkali catalyst is 2%. , React at 100°C reflux temperature for 2h, then add dropwise the mixed solution of formaldehyde and furfural and the added amount of the mixed solution is 72 parts by mass, react at 100°C reflux temperature for 2h, the mass ratio of formaldehyde to furfural in the mixed solution When the consumption of formaldehyde and furfural reaches 90%, neutralize with acid and adjust the pH of the system to 6.5 to obtain a resole phenolic resin with a solid content of 78%. At room temperature, the viscosity is 1.0Pa·S;

[0018] Stir and mix the obtained resol phenolic resin, foaming catalyst, surfactant and foaming agent uniformly, and the mass ratio of the resol phenolic resin, foaming catalyst, surfactant and foaming agen...

Embodiment 2

[0020] In 100 parts by mass of molten phenol, 6 parts by mass of aqueous alkali catalyst and 30 parts by mass of lignin are added, the aqueous alkali catalyst is an aqueous alkaline earth metal hydroxide, and the concentration by mass of the aqueous alkali catalyst is 3%. , React at 90°C reflux temperature for 1h, then add dropwise the mixed solution of formaldehyde and furfural and the added amount of the mixed solution is 70 parts by mass, react at 90°C reflux temperature for 2h, the mass ratio of formaldehyde to furfural in the mixed solution When the consumption of formaldehyde and furfural both reach 90%, neutralize with acid and adjust the pH of the system to 6.8 to obtain a resole phenolic resin with a solid content of 78%. At room temperature, the viscosity is 8.4Pa·S ;

[0021] Stir and mix the obtained resol phenolic resin, foaming catalyst, surfactant, and foaming agent uniformly, and the mass ratio of the resole phenolic resin, foaming catalyst, surfactant and foaming ...

Embodiment 3

[0023] To 100 parts by mass of molten phenol, add 10 parts by mass of an aqueous alkali catalyst solution and 40 parts by mass of lignin, the aqueous alkali catalyst solution is an aqueous alkaline earth metal hydroxide solution, and the mass percentage concentration of the aqueous alkali catalyst solution is 5% , The reaction was carried out at 100°C reflux temperature for 1.5h, and then the mixed solution of formaldehyde and furfural was added dropwise and the added amount of the mixed solution was 60 parts by mass. The reaction was carried out at 100°C reflux temperature for 2h, the mass of formaldehyde and furfural in the mixed solution The ratio is 50:50. When the consumption of formaldehyde and furfural both reach 90%, neutralize with acid, adjust the pH of the system to 7.0, and obtain a resole phenolic resin with a solid content of 80%. At room temperature, the viscosity is 6.5Pa· S;

[0024] Stir and mix the obtained resol phenolic resin, foaming catalyst, surfactant, and...

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Abstract

The invention relates to a method for preparing biomass modified phenol formaldehyde foamed plastics, which comprises: adding 5 to 10 mass portions of base catalyst aqueous solution and 30 to 60 mass portions of lignin into 100 mass portions of phenol, wherein the mass percent concentration of the base catalyst aqueous solution is between 2 and 10 percent; reacting for 1 to 2 hours at a reflux temperature of between 90 and 150 DEG C; dripping 72 to 39 mass portions of mixed solution again, wherein the mixed solution consists of formaldehyde and furfural, and the mass ratio of the formaldehyde to the furfural is 60-35:40-65; reacting for 2 to 3 hours at the reflux temperature of between 90 and 150 DEG C; using an acid for neutralization after the reaction is over, and obtaining resol of which the solid content of which is between 78 and 83 percent; and uniformly stirring 100 mass portions of the resol, 5 to 15 mass portions of foaming catalyst, 1 to 5 mass portions of surfactant and 6 to 15 mass portions of foaming agent for foaming at a temperature of between 5 and 160 DEG C, and obtaining a low-pollution heat-insulating building material the performance index of which reaches the petrochemical product level.

Description

1. Technical Field [0001] The invention belongs to a preparation method of a biomass lignin furfural modified phenolic foam plastic insulation material. In particular, it relates to a method for synthesizing low-polluting thermosetting biomass phenolic resin-resole phenolic resin using my country's rich lignin resources and furfural resources, and then further obtaining foam insulation materials through special foaming technology. 2. Background technology [0002] Phenolic foam has excellent heat resistance and is an excellent variety in synthetic foam that can withstand higher temperatures. For example, the maximum use temperature of polystyrene foam is 70°C, polyurethane foam is 120°C, and phenolic foam is 150°C. The highest temperature can reach 200°C. In recent years, due to high-rise buildings, transportation, aviation industry, space technology and other aspects put forward strict requirements on the thermal stability and combustion resistance of synthetic foam, the use of ...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08L61/06C08G8/04
Inventor 周永红胡立红刘红军
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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