Preparing method of toughening metlbond foam

A phenolic foam and toughening technology, which is applied in the field of preparation of toughened phenolic foam, can solve the problems of low thermal conductivity, easy slag drop, hindering the popularization and application of phenolic foam, etc., and achieve the effect of low thermal conductivity and good solubility

Inactive Publication Date: 2009-09-09
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. Low thermal conductivity, the thermal conductivity of phenolic foam insulation material is the lowest among all thermal insulation materials
[0010] But at the same time, phenolic foam also has fatal weaknesses such as brittleness, low strength, and easy to drop slag, which hinders the large-scale popularization and application of phenolic foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh 25 grams of phosphoric acid, 12.5 grams of p-toluenesulfonic acid, 2.5 grams of boric acid, and 10 grams of water, mix and dissolve, and set aside as a curing agent.

[0056] 3.5 grams of polyvinyl alcohol with a degree of polymerization of 500 and a degree of alcoholysis of 88 are dissolved in 5 grams of water, 15 grams of ethylene glycol are added, and 9 grams of polyvinylpyrrolidone with an average molecular weight of 130,000 are dissolved therein as a compound polymer. The toughening agent solution is ready for use.

[0057] Add 50 grams of resole phenolic resin, all of the above composite toughening agent solutions, 3 grams of Tween-80, 5 grams of pentane, and more than 5 grams of curing agent prepared in turn into the mixing pot, stir at high speed for 30 seconds, and quickly pour into a certain volume In the mold, close the mold, foam and solidify at 75°C for 1 hour, cool, demould, and the density is 70kg / m 3 Toughened phenolic foam left and right.

Embodiment 2

[0059] Weigh 10 grams of phosphoric acid, 20 grams of p-toluenesulfonic acid, 3.5 grams of boric acid, and 16.5 grams of water, mix and dissolve, and set aside as a curing agent.

[0060] Dissolve 2 grams of polyvinyl alcohol with a degree of polymerization of 500 and a degree of alcoholysis of 99 in 6 grams of water, add 5 grams of ethanol, add 10 grams of polyethylene glycol 400, and then add 10 grams of polyvinylpyrrolidone with an average molecular weight of 90,000 It is dissolved in it and used as a composite toughening agent solution.

[0061] Add 50 grams of resole phenolic resin, 50% of the above composite toughening agent solution, 3 grams of Tween-80, 6.5 grams of pentane, and more than 8 grams of curing agent prepared in turn into the mixing pot, stir at high speed for 30 seconds, and quickly pour In a mold with a certain volume, close the mold, foam and solidify at 75°C for 1 hour, cool, demould, and the density is 40kg / m 3 Toughened phenolic foam left and right. ...

Embodiment 3

[0063] Weigh 15 grams of phosphoric acid, 18 grams of p-toluenesulfonic acid, 5 grams of boric acid, and 12 grams of water, mix and dissolve, and set aside as a curing agent.

[0064] 1.5 grams of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 88 was dissolved in 7 grams of water, 5 grams of ethanol was added, 5 grams of ethylene glycol was added, 5 grams of diethylene glycol was added, and 10 grams of polyvinyl alcohol with an average molecular weight of 2 Wan's polyvinylpyrrolidone is dissolved in it, and it is used as a composite toughening agent solution.

[0065] Add 50 grams of resole phenolic resin, the above 70% composite toughening agent solution, 3 grams of Tween-80, 5 grams of pentane, and more than 6 grams of the curing agent prepared in turn into the mixing pot, stir at high speed for 30 seconds, and quickly pour In a mold with a certain volume, close the mold, foam and solidify at 75°C for 1 hour, cool, demould, and the den...

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Abstract

The invention discloses a preparing method of toughening metlbond foam, which is prepared by the high-speed mixing and the heating foaming of the following raw materials by weight parts: 100 of A-stage metlbond resin, 5 to 35 of compound toughening agent, 5 to 10 of surface active agent, 8 to 15 of foaming agent and 7 to 20 of solidifying agent. The invention introduces a new compound toughening agent in the technology, develops a solvent with good dissolubility to the compound toughening agent and good mixing performance with the foaming system, compounds a new solidifying agent, solves the defects of easy slag falling, fragile quality, low strength and poor toughness of the metlbond foam, and keeps the traditional advantages of low heat conducting coefficient, less smoke, burning resistance, and the like of the metlbond foam.

Description

technical field [0001] The invention relates to a preparation method of thermal insulation material, in particular to a preparation method of toughened phenolic foam. Background technique [0002] Foam plastics are widely used in the field of heat insulation and heat preservation due to their low thermal conductivity, light weight, and convenient construction. The disadvantages of large smoke generation, high toxicity, and low heat resistance temperature greatly restrict its application in ships, buildings, etc. Phenolic Foam (PF for short) is a material with excellent performance in fire prevention, heat insulation, sound insulation, light weight and energy saving. , polyurethane (PU), polyethylene (PE), etc., the thermal insulation effect is more than 1 times higher than traditional thermal insulation materials such as mineral wool, light cork, perlite, glass wool, etc. flame retardant properties. Phenolic foam has the advantages of low price, good fire resistance, non-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/10C08L29/04C08L39/06C08K3/32C08K3/38C08K5/42C08J9/14
Inventor 黄剑清
Owner SHANGHAI INST OF TECH
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