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Method for preparing safe environment-friendly phenolic foam

A phenolic foam, safe and environmentally friendly technology, applied in the field of phenolic foam manufacturing, can solve problems such as flammability, and achieve the effects of safe production process, uniform texture, and small pore size

Inactive Publication Date: 2011-11-02
SHANDONG LAIWU RUNDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is: although the price of this foaming agent is low, its biggest disadvantage is that it is flammable, and special attention should be paid to fire prevention at the production site when it is used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Synthesis of expandable phenolic resin: 100 parts of phenol and 130 parts of formaldehyde are mixed uniformly, and 6.5 parts of Na are added 2 CO 3 , React at 70°C for 1 hour, and at 80°C for 2 hours, add formic acid to adjust the pH of the reaction solution to 7.00, calculate the amount of water, and vacuum dehydrate to obtain an expandable phenolic resin with a viscosity of 5000 mPa·s.

[0019] 2. Preparation method of phenolic foam: Expandable phenolic resin: 100 parts, benzenesulfonic acid: 10 parts, Tween-80: 8 parts, filler Al(OH) 3 : 20 parts, stir each component in the reactor at high speed for 5min, mix evenly, and quickly transfer to the mold preheated to 60℃, at 15kg / cm 2 Foam for 20 minutes under the conditions, and open the foamed mold to obtain a molded phenolic foam insulation board product.

Embodiment 2

[0021] 1. Synthesis of expandable phenolic resin: 100 parts of phenol and 140 parts of formaldehyde are mixed uniformly, and 6.8 parts of K are added. 2 CO 3 , React at 70°C for 1 hour and at 80°C for 2 hours, add formic acid to adjust the pH of the reaction solution to 7.00, calculate the amount of water, and vacuum dehydrate to obtain an expandable phenolic resin with a viscosity of 4500 mPa·s.

[0022] 2. Preparation method of phenolic foam: Expandable phenolic resin: 100 parts, phosphoric acid: 15 parts, Tween-80: 6 parts, nylon 66: 12 parts, expanded perlite: 28 parts, put each component in the reactor Stir at high speed for 5min inside, mix evenly, quickly transfer to the mold preheated to 70℃, under 15kg / cm 2 Foam for 20 minutes under the conditions, and open the foamed mold to obtain a molded phenolic foam insulation board product.

Embodiment 3

[0024] 1. The synthesis of expandable phenolic resin: 100 parts of phenol and 150 parts of formaldehyde are mixed uniformly, and 7 parts of Na are added 2 CO 3 , React at 70°C for 1 hour and at 80°C for 2 hours, add formic acid to adjust the pH of the reaction solution to 7.00, calculate the amount of water, and vacuum dehydrate to obtain an expandable phenolic resin with a viscosity of 3500 mPa·s.

[0025] 2. Preparation method of phenolic foam: expandable phenolic resin: 100 parts, oxalic acid: 12 parts, Tween-80: 4 parts, MgOH) 2 : 50 parts, stir each component in the reactor at high speed for 5min, mix evenly, and quickly transfer to the mold preheated to 75℃, under 25kg / cm 2 After foaming for 30 minutes under the conditions, the foamed mold is opened to obtain a molded phenolic foam insulation board product.

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Abstract

The invention discloses a method for preparing safe environment-friendly phenolic foam. The foam is prepared by a reaction after mixing the following ingredients: 100 weight portions of expandable phenolic resin, 8-15 weight portions of curing agent, 4-8 weight portions of surfactant and 20-50 weight portions of packing. The preparation method comprises the following steps: putting the ingredients in a reaction container in proportion, stirring with high speed, after mixing uniformly, transferring the ingredients to a preheated mould, foaming at the temperature of 60-80 DEG C and under the pressure of 15-40kg / cm<2>, cooling and demoulding. According to the method, because inflammable CFCs, low-carbon alkane and other lower-boiling organic compounds are not used as foaming agent, the production cost is reduced. The prepared phenolic foam has uniform quality, small aperture, low coefficient of thermal conductivity, and good thermal insulation performance, can be widely used in exterior wall, roofing, air-conditioning bellow and other thermal insulation materials, and improves thermal insulation performance and fireproof performance greatly.

Description

Technical field [0001] The invention relates to the technical field of manufacturing phenolic foam, in particular to a method for preparing safe and environmentally friendly phenolic foam. The method does not use chlorofluorocarbons, low-carbon alkanes and other low-boiling organic compounds as blowing agents. The production process Safe and environmentally friendly. Background technique [0002] Phenolic foam is a kind of foamed plastic obtained by foaming phenolic resin. It is called the third generation of emerging thermal insulation materials. It is currently the fastest growing variety of foam thermal insulation materials and is called the "King of Insulation". Compared with materials such as polystyrene foam, polyvinyl chloride foam, and polyurethane foam, which dominated the market in the early days, it has special excellent advantages in flame retardancy. Because of its light weight, large rigidity, good dimensional stability, chemical resistance, good heat resistance, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/08C08L61/10
Inventor 郑超李长彬董小强吕占美刘卫国刘刚秦昌
Owner SHANDONG LAIWU RUNDA NEW MATERIAL
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