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Toughened modified phenolic foam and preparation method thereof

A technology of toughening modification and phenolic foam, which is applied in the field of reinforcement modification, phenolic foam and its preparation, and toughening of phenolic resin, which can solve the problems of low toughness of phenolic foam, poor molecular chain flexibility, and high powder dropping rate, and achieve Improved toughness of phenolic foam, high compressive strength, and small slag drop

Inactive Publication Date: 2015-03-04
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phenolic resin also has disadvantages. For example, the cured phenolic resin is only connected by methylene groups between the aromatic nuclei, the molecular chain is poorly flexible and brittle, and the prepared phenolic foam has low toughness and high powder dropping rate, which affects it. Promoted application of

Method used

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  • Toughened modified phenolic foam and preparation method thereof
  • Toughened modified phenolic foam and preparation method thereof
  • Toughened modified phenolic foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 A toughened modified phenolic foam is mainly prepared from the following raw materials in mass proportions: 40 parts of toughened modified phenolic resin; 4 parts of composite surfactant; 6 parts of composite foaming agent; mixed acid 4 parts of curing agent.

[0034] Add phenol / formaldehyde in a certain molar ratio to a three-necked flask equipped with a condenser, an electric stirrer and a thermometer, start the stirrer and heat in a water bath; after the mixture in the bottle is preheated and stirred evenly, add a certain amount of 20% sodium hydroxide The solution is used as a catalyst, adjust the pH=9, add triphenyl phosphate, slowly raise the temperature, after the temperature of the mixture in the bottle reaches 85°C-90°C and keep it for 1 hour, add 3% (accounting for phenol mass) phthalic anhydride polyester polyol, use Adjust the pH of the reaction solution to 5 with formic acid, continue to react at 85°C-90°C for 1 hour, add a certain amount of 20% s...

Embodiment 2

[0036] Example 2 The toughened modified phenolic foam is mainly prepared from the following raw materials in mass proportions, 50 parts of toughened modified phenolic resin; 2.5 parts of surfactant Tween-80; 4 parts of composite foaming agent; 6 parts of acid curing agent.

[0037] Add phenol / formaldehyde in a certain molar ratio to a three-necked flask equipped with a condenser, an electric stirrer and a thermometer, start the stirrer and heat in a water bath; after the mixture in the bottle is preheated and stirred evenly, add a certain amount of 20% sodium hydroxide The solution is used as a catalyst, adjust the pH=9, add triphenyl phosphite and slowly raise the temperature, after the temperature of the mixture in the bottle reaches 85°C-90°C and keep it for 1 hour, add 5% (accounting for phenol mass) phthalic anhydride polyester polyol, Use dilute formic acid to adjust the pH of the mixture to 5, continue to react at 85°C-90°C for 1 hour, add a certain amount of 20% sodium...

Embodiment 3

[0039] Example 3 Toughened and modified phenolic foam is mainly prepared from the following raw materials in mass ratio: 70 parts of toughened modified phenolic resin; 3.5 parts of composite surfactant; 5 parts of composite foaming agent; mixed acid curing agent 7 servings.

[0040] Add phenol / formaldehyde in a certain molar ratio to a three-necked flask equipped with a condenser, an electric stirrer and a thermometer, start the stirrer and heat in a water bath; after the mixture in the bottle is preheated and stirred evenly, add a certain amount of 20% sodium hydroxide The solution is used as a catalyst, adjust the pH to 9, add triphenyl borate and slowly raise the temperature, after the temperature of the mixture in the bottle reaches 85°C-90°C and keep it for 1 hour, add 10% (accounting for phenol mass) of phthalic anhydride polyester polyol, use Dilute formic acid to make the pH of the mixture = 5, continue to react at 85°C-90°C for 1 hour, add a certain amount of 20% sodi...

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Abstract

The invention discloses toughened modified phenolic foam. The toughened modified phenolic foam is prepared from the following raw materials in parts by mass: 40-80 parts of toughened modified phenolic resin, 2-4 parts of a composite surfactant, 3-6 parts of a composite foaming agent and 4-8 parts of a mixed acid curing agent. Sulfuric acid, phosphoric acid, boric acid, methylsulphonic acid, dodecylbenzene sulfonic acid, camphorsulfonic acid and the like are mixed in a certain ratio to obtain an inorganic / organic mixed acid serving as both a curing agent and a composite surfactant; the curing rate and the foaming rate are appropriate; the prepared phenolic foam is even, fine and smooth in foam pores, and the phenolic resin foam is light in color; triphenyl phosphate, triphenyl phosphite and triphenyl borate are taken as crosslinking enhancers to further improve the mechanical properties of the phenolic foam.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to toughening and strengthening modification of phenolic resin, phenolic foam and a preparation method thereof. Background technique [0002] Phenolic resin has the advantages of good heat resistance, high mechanical strength, and stable performance, and is widely used in the preparation of glass fiber reinforced plastics, molding compounds, coatings, adhesives, refractory binders, and thermal insulation materials. In particular, the characteristics of flame retardancy, safety, and environmental protection make it a new type of building insulation material, and it is also known as the "king of insulation" by industry insiders. However, phenolic resin also has disadvantages. For example, the cured phenolic resin is only connected by methylene groups between the aromatic nuclei, the molecular chain is poorly flexible and brittle, and the prepared phenolic foam has lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C08G8/10C08G81/00C08L61/14C08J9/14C08K13/02C08K3/30C08K3/32C08K3/38C08K5/42
Inventor 王怀生陶绪泉崔慧陈汪洋高太明
Owner LIAOCHENG UNIV
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