Phenolic foam for exterior wall heat preservation and preparation thereof

A technology of phenolic foam and external wall insulation, applied in covering/lining, construction, building construction, etc., can solve the problems of limited thermal conductivity, strength and anti-aging stability, difficulty in applying external wall insulation, and easy aging and brittleness , to achieve a stable and controllable reaction process, avoid local temperature instability, and good dimensional stability

Inactive Publication Date: 2010-10-06
JIANGSU FENGCAI THERMAL INSULATION DECORATIVE SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing phenolic foam still has various disadvantages, such as low closed cell rate, easy opening of the foam, high brittleness, aging and brittleness or even pulverization after long-term use, etc., and the phenolic foam is also easy to degrade when it meets water or moisture ,weightlessness
These shortcomings of the existing phenolic foam greatly limit its ideal thermal conductivity, strength and anti-aging stability for a long time, so it is difficult to apply to the field of external wall insulation. At present, the insulation board made of domestic phenolic foam can only be used Insulation for central air-conditioning ducts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The waxberry bark is soaked in water, concentrated and dried to obtain bayberry extract with a tannin content of 30% to 75%, and then the bayberry extract is dissolved in water to obtain a bayberry extract solution with a mass ratio of 20% to 50%. In 1 ton of reactor, add 64.1kg red bayberry extract solution, 200kg mass ratio is 37% formaldehyde solution, 10kg magnesium oxide, stir well, add reaction at 50 ℃ for 60 minutes, generate and contain the methylol active group Low molecular weight addition product. Cool down to below 40°C, add 400kg phenol, 4kg tetradecylamine, 5kg ammonia water (density 0.92g / cm 3 ), 10kg of magnesium oxide, stirred, kept warm for 25 minutes, and added the remaining 423kg of formaldehyde solution in 3 times, heated up to 95°C for 40 minutes of polycondensation reaction to generate polycondensation products, then lowered the temperature to below 40°C, and then added acetic acid to adjust the pH value to 7. During the reaction, on the one han...

Embodiment 2

[0026] In 1 ton of reactor, add 80kg mass ratio and be 20%~50% red bayberry extract solution (the method for making red bayberry extract solution is the same as embodiment 1), 400kg mass ratio is 37% formaldehyde solution, 2kg calcium oxide, stir evenly , react at 60°C for 50 minutes, cool down to below 40°C, add 400kg phenol, 4kg hexamethylenediamine, 5kg ammonia water (density 0.92g / cm 3 ), 8kg calcium oxide, stirred, kept warm for 30 minutes, and added the remaining 410kg formaldehyde solution in 4 times, raised the temperature to 95°C and reacted for 30 minutes, then lowered the temperature to below 40°C, and then added acetic acid to adjust the pH value to 7. Distilled under reduced pressure for 2 hours at a temperature of 70° C. and 12 KPa to obtain a bayberry extract modified phenolic resin with a viscosity of 9000 mPa·s and a water content of 10%.

[0027] Take 100kg of bayberry extract modified phenolic resin, 3kg of silicone DC193, 15kg of n-butane, mix well, then ad...

Embodiment 3

[0029] In 1 ton of reactor, add 50kg mass ratio and be 20%~50% red bayberry extract solution (the method for making red bayberry extract solution is the same as embodiment 1), 300kg mass ratio is 37% formaldehyde solution, 2kg calcium oxide, 2kg oxide Magnesium, stir evenly, react at 75°C for 35 minutes, cool down to below 40°C, add 400kg phenol, 4kg cetylamine, 5kg ammonia water (density 0.92g / cm 3 ), 5kg calcium oxide, stirred, kept warm for 40 minutes, and added the remaining 389kg formaldehyde solution in 5 times, raised the temperature to 110°C and reacted for 25 minutes, then lowered the temperature to below 40°C, and then added acetic acid to adjust the pH value to 7. Distilled under reduced pressure for 2 hours at a temperature of 75° C. and 14 KPa to obtain a bayberry extract modified phenolic resin with a viscosity of 12000 mPa·s and a water content of 6%.

[0030] Take bayberry extract modified phenolic resin 100kg, Tween-604kg, n-hexane 20kg, mix well, then add xyl...

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PUM

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Abstract

The invention relates to phenolic foam for external wall insulation and a preparation method thereof, which belong to the technical field of building material. The phenolic foam comprises the following raw materials in portion by weight: 100 portions of myrica extract modified phenol-formaldehyde resin, 1 to 8 portions of a foam homogenizing agent, 5 to 20 portions of a foaming agent, and 10 to 20 portions of a firming agent, wherein the myrica extract modified phenol-formaldehyde resin is prepared from the following compositions in portion by weight: 100 portions of phenol, 200 to 300 portions of a formaldehyde solution, 12 to 25 portions of a myrica extract solution, 0.5 to 8 portions of metal oxide, 4 to 30 portions of a modifying addition agent, and 1 to 20 portions of a mixed catalyst. The phenolic foam has the advantages that the phenolic foam has fine foaming pores, high porosity by closed pore, low coefficient of heat conductivity, low water absorption, high strength and good dimension stability, can be used as an external wall insulating material, has the advantages of simple manufacture, easily obtained raw materials and low cost, and is applicable to mass production.

Description

technical field [0001] The invention relates to a phenolic foam for external wall heat preservation, and also relates to a preparation method thereof, which belongs to the technical field of building materials. Background technique [0002] Phenolic foam is a hard and closed-cell thermal insulation material, which has the characteristics of good heat insulation, flame retardancy, low smoke when burning, dimensional stability, etc., and is easy to process and low in production cost. Materials are widely used. However, the existing phenolic foam still has various disadvantages, such as low closed cell rate, easy opening of the foam, high brittleness, aging and brittleness or even pulverization after long-term use, etc., and the phenolic foam is also easy to degrade when it meets water or moisture ,weightlessness. These shortcomings of the existing phenolic foam greatly limit its ideal thermal conductivity, strength and anti-aging stability for a long time, so it is difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/14C08K3/22C08J9/14E04F13/075
Inventor 朱殿奎沈志明李晴朱灿银季永新
Owner JIANGSU FENGCAI THERMAL INSULATION DECORATIVE SHEET
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