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Production process of high strength and low density foamed phenolic resin

A technology of phenolic foam and production method, applied in the field of organic chemical industry, can solve problems such as reducing product competitiveness, increasing production cost, affecting thermal insulation effect, etc., and achieving the effects of improving market competitiveness, reducing production cost, and broadening application fields

Inactive Publication Date: 2009-12-30
湖南中野高科技特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this will affect its insulation effect, increase its production cost, and reduce the competitiveness of products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1), 495kg of phenol, 0.7kg of cashew nut shell oil, 0.4kg of tung oil, 497kg of formaldehyde, and 0.8kg of sodium hydroxide were dropped into the reaction kettle. Heating, heating up to 60°C to stop heating. Then with the heat released in the reaction process, the temperature rises automatically, and the temperature rise rate is 1°C per minute. When the temperature reaches 80°C, the heating rate is controlled at 1°C every 1.5 minutes, and when the temperature reaches 80°C, the timer lasts for 20 minutes;

[0015] (2), at the end of 20 minutes, drop the remaining formaldehyde 213kg and sodium hydroxide 0.8kg into the reactor. The temperature is controlled above 70°C, and the temperature is raised at a rate of 1°C per minute, and when it reaches 100°C-103°C, it is kept for 60 minutes;

[0016] (3) After the time is up, add 0.9kg of polyacrylamide, 0.9kg of polyethylene glycol, and 0.8kg of triphenyl phosphate into it, vacuum dehydrate 398kg, cool down to 60°C after deh...

Embodiment 2

[0019] (1), 505kg of phenol, 1.5kg of cashew nut shell oil, 1kg of tung oil, 547.5kg of formaldehyde, and 0.9kg of sodium hydroxide are put into the reaction kettle. Heating, heating up to 60°C to stop heating. Then with the heat released in the reaction process, the temperature rises automatically, and the temperature rise rate is 1°C per minute. When the temperature reaches 80°C, the heating rate is controlled at 1°C every 1.5 minutes, and when the temperature reaches 80°C, the timer lasts for 20 minutes;

[0020] (2), at the end of 20 minutes, drop the remaining formaldehyde 182.5kg and sodium hydroxide 0.9kg into the reactor. The temperature is controlled above 70°C, and the temperature is raised at a rate of 1°C per minute, and when it reaches 100°C-103°C, it is kept for 60 minutes;

[0021] (3) After the time is up, add 0.9kg of polyacrylamide, 0.9kg of polyethylene glycol, and 0.8kg of triphenyl phosphate into it, vacuum dehydrate 398kg, cool down to 60°C after dehydr...

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Abstract

The production process of foamed phenolic resin with high strength and low density includes the following steps: 1. preparing phenol, cashew shell oil, tong oil, formaldehyde, sodium hydroxide and urea in certain weight proportion; 2. throwing phenol, cashew shell oil, tong oil, 70-75 % of the formaldehyde, and 50-55 % of the sodium hydroxide into the reactor to react at 80 deg.c for 20 min; 3. throwing the rest formaldehyde and sodium hydroxide into the reactor to react at 100-103 deg.c for 50-70 min, adding urea and modifier in the amount of 0.35-0.85 wt% of phenols to obtain phenolic resin; and 4. adding the phenolic resin, surfactant, foaming agent and curing agent in certain weight proportion into mold to foam and to produce the foamed phenolic resin. The present invention has lowered production cost.

Description

technical field [0001] The invention relates to a production method of a phenolic foam material product with low density and high strength, and belongs to the technical field of organic chemical industry. Background technique [0002] Phenolic resin is the earliest industrialized plastic product in the world, and phenolic foam is a variety that has just been successfully developed in recent decades. Phenolic foam is known as the "king of insulation", but the structure of phenolic foam is loose, so its application is limited. In order to make it widely popularized and applied, it is usually more effective to increase the density of the foam to increase the strength of the foam. But in this way, it will affect its thermal insulation effect, increase its production cost, and reduce the competitiveness of products. Especially in the current situation where the price of petrochemical raw materials remains high, the industrial production of low-cost, high-performance phenolic fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/32C08J9/04C08K5/54C08K5/01C08K5/42
Inventor 谢建军黄明娜陈碧林
Owner 湖南中野高科技特种材料有限公司