A kind of production method of normal temperature fluorine-free foaming neutral phenolic foam

A technology of phenolic foam and production method, which is applied in the field of polymer organic compounds, can solve problems such as low strength, difficult on-site implementation, and ozone layer destruction, and achieve the effects of improved compressive strength or bending strength, wide application range, and reduced thermal conductivity

Inactive Publication Date: 2011-12-21
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

This kind of phenolic foam material is generally formed by foaming thermosetting phenolic resin. Its defect is that when the phenolic resin is foamed, it needs to be kept warm at about 70°C, which is difficult to implement on site; secondly, the curing agent added when the phenolic resin is foamed is organic acid or Inorganic acid has strong acidity. Once mixed with water or water vapor, it will pollute the environment, corrode metals, and leave potential safety hazards; third, the traditional technology uses fluorine-containing foaming agents for foaming, which are harmful to the ozone layer. It has a destructive effect; fourth, the molecular rigidity of phenolic resin is large, which often leads to the brittleness of the generated phenolic foam and the low strength, which needs to be toughened and modified
However, ordinary toughening methods will lead to a decrease in the fire resistance of phenolic resins, or lead to poor compatibility of resins and difficult processing.

Method used

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  • A kind of production method of normal temperature fluorine-free foaming neutral phenolic foam

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Experimental program
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Embodiment 1

[0027] (1), get 250kg of phenol, 70kg of industrial paraformaldehyde, 2kg of oxalic acid, 1kg of hydrochloric acid, and 200kg of water for subsequent use;

[0028] (2), add phenol, oxalic acid, hydrochloric acid, water prepared in step (1) in the reaction kettle, heat up to 60~85 ℃, slowly add the industrial paraformaldehyde prepared in step (1) within 1 hour, the feeding process keeps 60 ~85°C temperature, heat up to 90-95°C after feeding, keep warm for 40 minutes, add 0.6kg of ammonia water for neutralization treatment, then use conventional methods to dehydrate 90kg, cool down to 40°C, and obtain thermoplastic phenolic resin for use;

[0029] (3), get phenol 250kg, industrial paraformaldehyde 130kg, sodium hydroxide 1kg, urea 10kg, water 200kg standby;

[0030] (4), phenol, sodium hydroxide and water prepared in step (3) are added in the reaction kettle, and the temperature is raised to 60~85° C., and the industrial paraformaldehyde prepared in step (3) is slowly added in 1...

Embodiment 2

[0036] (1), get phenol 500kg, industrial paraformaldehyde 128kg, oxalic acid 5kg, hydrochloric acid 4kg, water 240kg standby;

[0037] (2), add phenol, oxalic acid, hydrochloric acid, water prepared in step (1) in the reaction kettle, heat up to 60~85 ℃, slowly add the industrial paraformaldehyde prepared in step (1) within 1 hour, the feeding process keeps 60 ~85°C temperature, heat up to 90-95°C after feeding, keep warm for 90 minutes, add 3kg of ammonia water for neutralization treatment, then use conventional methods to dehydrate 120kg, cool down to 40°C, and obtain thermoplastic phenolic resin for use;

[0038] (3), get phenol 500kg, industrial paraformaldehyde 300kg, sodium hydroxide 5kg, urea 20kg, water 240kg standby;

[0039] Step (4) is with embodiment 1;

[0040] (5) Raise the temperature in the reactor to 95-105° C., and keep the temperature at 95-105° C. for 60 minutes. Then use conventional method to dehydrate 120kg. After the dehydration is complete, cool dow...

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Abstract

The invention relates to a method for producing normal temperature CFC (Chloro Flouro Carbon)-free neutral phenolic froth-foam, which adopts the following raw materials and comprises the following steps of: (1) preparing phenol, industrial paraformaldehyde, oxalic acid, hydrochloric acid and water; (2) performing a heat preservation reaction; (3) preparing phenol, industrial paraformaldehyde, sodium hydroxide, urea and water; (4) adding the raw materials in the step (3) into a reaction kettle to heat; (5) dehydrating; (6) adding the raw materials in the step (2) into a stirring tank; (7) adding the raw materials in the step (5) into the stirring tank; and (8) adding a curing agent and pouring the mixture into a die to carry out normal temperature foaming to obtain the product. In the method, a CFC-free foaming agent is adopted, so that the ozone layer cannot be damaged; and the acidity-alkalinity of a foam body is neutral, so the product has no corrosivity and has better anti-breakingcapacity, longer service life and wider application range.

Description

technical field [0001] The invention belongs to the technical field of macromolecular organic compounds, and in particular relates to a production method of fluorine-free foaming neutral phenolic foam at normal temperature. Background technique [0002] Phenolic foam is a new type of non-combustible fireproof insulation material with low raw material price and simple production process. In recent years, this material has been used more and more in central air-conditioning ducts, wall insulation, petrochemical pipeline insulation, aerospace equipment, etc., and its application range has become wider and wider. This kind of phenolic foam material is generally formed by foaming thermosetting phenolic resin. Its defect is that when the phenolic resin is foamed, it needs to be kept warm at about 70°C, which is difficult to implement on site; secondly, the curing agent added when the phenolic resin is foamed is organic acid or Inorganic acid has strong acidity. Once mixed with wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/10C08K13/02C08K5/3477C08K3/22C08J9/14C08G8/10
Inventor 喻泽黎超
Owner 湖南中野高科技特种材料有限公司
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