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Resin for high-flame-retardant phenol formaldehyde foam and production method thereof

A technology of phenolic foam and production method, which is applied in the directions of earthwork drilling, dust prevention and fire prevention, etc., can solve the problems of unsatisfactory flame retardancy of foam and easy precipitation of additives.

Inactive Publication Date: 2010-07-21
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that the flame retardancy of the obtained foam is not ideal, and the additives are easy to precipitate during storage

Method used

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  • Resin for high-flame-retardant phenol formaldehyde foam and production method thereof
  • Resin for high-flame-retardant phenol formaldehyde foam and production method thereof
  • Resin for high-flame-retardant phenol formaldehyde foam and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0045] Example 1 (continuous method)

[0046] Step 1: Take phenol: 282g (3mol), formaldehyde with a concentration of 37%: 292g (3.6mol), adjust the pH to 9.7-10.0 with 20% sodium hydroxide solution, heat up to 67°C-70°C for 4 hours , lower the temperature below 60°C, and generate ordinary phenolic foam resin.

[0047] The second step: add melamine: 2.25g, heat up to 92°C-95°C and react until the viscosity is 14.5 seconds-15 seconds (T-4 Tu 4 viscometer).

[0048] The third step: adjust the pH value to 6.0 to 8.5 with phosphoric acid, dehydrate 142g with a vacuum greater than -0.07Mpa, add polyethylene glycol: 9g, Tween 80: 6.75g, mix evenly, and finally obtain the present invention About 450g of high flame retardant phenolic foam resin.

example 2

[0049] Example two (continuous method)

[0050] Step 1: Take phenol: 282g (3mol), formaldehyde with a concentration of 37%: 413g (5.1mol), adjust the pH to 8.5-8.9 with 20% sodium hydroxide solution, heat up to 85°C-88°C for 2 hours , lower the temperature below 60°C, and generate ordinary phenolic foam resin.

[0051] The second step: add melamine: 5g, heat up to 60°C-65°C and react until the viscosity is 13-13.5 seconds (T-4 coated with 4 viscometer).

[0052] The third step: use lactic acid to adjust the pH value to 6.0~8.5, dehydrate 265g with a vacuum greater than -0.07Mpa negative pressure, add ethylene glycol: 40g, Tween 80: 25g, mix evenly, and finally obtain the high About 500g of resin for flame retardant phenolic foam.

example 3

[0053] Example three (continuous method)

[0054] Step 1: Take phenol: 282g (3mol), formaldehyde with a concentration of 37%: 510g (6.3mol), adjust the pH to 7.8-8.2 with 30% sodium hydroxide solution, heat up to 85°C-88°C for 1 hour , lower the temperature below 60°C, and generate ordinary phenolic foam resin.

[0055] The second step: add melamine: 16.2g, heat up to 75°C-78°C and react until the viscosity is 12.5 seconds-13.0 seconds (T-4 Tu 4 viscometer).

[0056] The third step: use lactic acid to adjust the pH value to 6.0-8.5, dehydrate 312g with a vacuum greater than -0.07Mpa, add ethylene glycol: 27g, Tween 80: 16.2g, mix evenly, and finally obtain the present invention About 540g of resin for high flame retardant phenolic foam.

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Abstract

The invention discloses resin for high-flame-retardant phenol formaldehyde foam and a production method thereof. The production method comprises the following steps of: adding melamine to resin for common phenol formaldehyde foam to react or adding a melamine resin polymer to mix, wherein the addition of the melamine is 0.5-8 percent of the total weight of resin for high-flame-retardant phenol formaldehyde foam; then, adjusting a pH value to 6.0-8.5 with acid, dewatering and concentrating; and adding a plasticizer and a surface active agent. The invention has simple production process, improves the flame-retardant performance of the phenol formaldehyde foam by the triple-nitrogen heterocyclic structure characteristics of the melamine so as to satisfy the requirement of an industry standard MT113-1995, i.e. a testing method and a judgment rule for the flame-resistant antistatic property of polymer products used under a coal mime, and the storage process is stable without generating sediment. The resin for the high-flame-retardant phenol formaldehyde foam can be used in occasions needing extinguishing materials, such as filling empties during the safe production of a mine preventing air leaking from coal cracks, making closed walls and fireproof walls on buildings and enhancing broken roofs and stratums.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry. In particular, it relates to a resin for high flame retardancy phenolic foam and a production method thereof. Background technique [0002] Phenolic resin is the earliest industrialized plastic product, and phenolic foam material is a variety that has just been successfully developed in recent decades. Phenolic foam material has low thermal conductivity, good fire resistance, less smoke when burning, non-toxic, and low water absorption. The advantages of fluorine-free foaming have been paid attention to, and its technical research and application development are very active. With the development of the coal industry, in the safety production of coal mines, people began to use phenolic foam plastics to solve the problems of filling holes in mine safety production, preventing air leakage in coal and rock fissures, making airtight walls and firewalls, etc. Reinforce the broken ro...

Claims

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Application Information

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IPC IPC(8): C08G14/10C08G8/28C09K21/14E21F5/00
Inventor 祝建勋刘昭荐
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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