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Method of preparing pnenolic aldehyde foam from modified foamable phenolic resin

A technology of phenolic resin and phenolic foam, which is applied in the field of polymer materials and its synthesis, can solve problems such as the unsatisfactory toughening effect of phenolic foam, and achieve the effects of reducing investment in fixed assets, strong controllability, and good dimensional stability

Active Publication Date: 2007-09-12
安徽复材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the toughening effect to phenolic foam in the above prior art is not ideal enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 800 kg of phenol, 160 kg of cashew nut oil resin, and 15 kg of 30% sodium hydroxide solution in a 2-ton reactor, add 320 kg of paraformaldehyde in 7 times at about 80°C, and react at 80°C for 30 minutes. React at 95°C for 30 minutes, cool down to 85°C and add 10 kg of urea to react for 50 minutes, cool down to 55°C to obtain a modified phenolic resin with a viscosity of 16000cp / 25°C.

[0026] Take 100 parts of the above-mentioned modified phenolic resin, 3 parts of Tween-80, 5 parts of petroleum ether, 2 parts of xylenesulfonic acid, and 6 parts of p-toluenesulfonic acid, stir at room temperature for 10 seconds at 15°C, and obtain after 2 minutes Cured phenolic foam with a density of 40 kg per cubic meter.

Embodiment 2

[0028] Add 800 kg of phenol, 200 kg of cashew nut oil resin, and 4 kg of 30% potassium hydroxide solution in a 2-ton reactor, add 400 kg of paraformaldehyde in 7 times at about 70°C, react at 70°C for 60 minutes, and then heat up React at 100°C for 15 minutes, cool down to 90°C and add 8 kg of urea to react for 20 minutes, cool down to 55°C to obtain a modified phenolic resin with a viscosity of 20,000 cp / 25°C.

[0029] Take 100 parts of the above-mentioned modified phenolic resin, 1 part of silicone oil H-330, 2 parts of n-pentane, 5 parts of xylenesulfonic acid, and 10 parts of p-toluenesulfonic acid. Obtained cured phenolic foam plastics, density is 40 kilograms per cubic meter.

Embodiment 3

[0031] Add 800 kg of phenol, 100 kg of cashew nut oil resin, and 10 kg of zinc acetate into a 2-ton reactor, add 480 kg of paraformaldehyde in 7 times at about 85°C, react at 85°C for 20 minutes, and then heat up to 97°C for reaction After 25 minutes, the temperature was lowered to 85°C and 40 kg of dicyandiamide was added to react for 100 minutes, and the temperature was lowered to 55°C to obtain a modified phenolic resin with a viscosity of 12000 cp / 25°C.

[0032] Take 100 parts of the above-mentioned modified phenolic resin, 4 parts of Tween-80, 8 parts of petroleum ether, and 12 parts of p-toluenesulfonic acid, stir at room temperature for 15 minutes at 5°C, and obtain cured phenolic foam after 3 minutes, with a density of 40 kilograms per cubic meter.

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Abstract

The invention relates to a method for preparing phenolic foam with the modified phenolic resin. In the invention, it mixes 100 weight share of cashew oil modified phenolic resin, 1~4 weight share of surfactant, 2~8 weight share of foaming agent, and then it adds 8~15 weight share of curing agent into the mixture and stirs it for 2~15 minutes, and then it cures the mixture at 65 ~ 80deg.C environment for 30 ~ 125 minutes to achieve the phenolic foam.

Description

technical field [0001] The invention relates to a polymer material and a synthesis method thereof, in particular to a method for preparing phenolic foam from a modified foamable phenolic resin. Background technique [0002] Phenolic foam is being paid more and more attention by people because of its characteristics such as easy availability of raw materials, low price, excellent product performance, flame retardant, self-extinguishing, and low smoke. But one disadvantage of phenolic foam is that it is brittle. It has become an important subject to modify phenolic resin to overcome the brittleness of phenolic foam. Chinese patent 200310113967 mentions the production of toughened phenolic foam, US patent US6476090 "phenolicfoam", US6472444 "closed cell phenolic foam", US4956394 "closed cell phenolicfoam containing alkyl glucosides", mainly through foaming agents and additives to improve foam. However, the toughening effect on phenolic foam in the above prior art is not satis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08G8/34
Inventor 杨金平
Owner 安徽复材科技有限公司
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