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Phenol formaldehyde foam by using aromatic hydrocarbon polyester polyol as toughener and preparation method thereof

A technology of polyester polyol and phenolic foam, which is applied in the field of new materials, can solve the problems of phenolic foam with low toughness, poor molecular chain flexibility, and influence on popularization and application, and achieve high compressive strength, improved toughness, and improved mechanical properties.

Inactive Publication Date: 2015-02-04
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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  • Phenol formaldehyde foam by using aromatic hydrocarbon polyester polyol as toughener and preparation method thereof
  • Phenol formaldehyde foam by using aromatic hydrocarbon polyester polyol as toughener and preparation method thereof
  • Phenol formaldehyde foam by using aromatic hydrocarbon polyester polyol as toughener and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 The phenolic foam using aromatic polyester polyol as a toughening agent is mainly prepared from the following mass ratio raw materials, 40 parts of toughened modified phenolic resin; 4 parts of surfactant water-based silicone oil; composite foaming 6 parts of agent; 8 parts of mixed acid curing agent.

[0032] 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°...

Embodiment 2

[0034] Example 2 The phenolic foam using aromatic polyester polyol as a toughening agent is mainly prepared from the following mass ratio raw materials, 50 parts of toughened modified phenolic resin; 2.5 parts of surfactant water-based silicone oil; composite foaming 4 parts of agent; 6 parts of mixed acid curing agent.

[0035] 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 formic acid to adjust the pH of the reaction solution to 5, continue to react at 85°C-...

Embodiment 3

[0037] Example 3 The phenolic foam using aromatic polyester polyol as a toughening agent is mainly prepared from the following mass ratio raw materials, 70 parts of toughened modified phenolic resin; 3.5 parts of surfactant water-based silicone oil; composite foaming 5 parts of agent; 7 parts of mixed acid curing agent.

[0038] 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 Adjust the pH of the reaction solution to 5 with formic acid, continue to react at...

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Abstract

The invention discloses a toughening-modified phenol formaldehyde foam which is mainly prepared from the following raw materials in parts by mass: 40-80 parts of toughening-modified phenol formaldehyde resin, 2-4 parts of surfactant water-based silicon oil, 3-6 parts of composite foaming agent and 4-8 parts of acid mixture curing agent. The sulfuric acid, phosphoric acid, boric acid, methylsulfonic acid, dodecylbenzene sulfonic acid, camphorsulfonic acid and the like are proportionally mixed to obtain the inorganic-organic acid mixture used as the curing agent, the curing rate and foaming rate are proper, and the system is heated gradually, thereby ensuring the reaction uniformity; and the prepared phenol formaldehyde foam has the advantages of uniform and fine foam pores and light color.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method for toughening and strengthening modification of phenolic resin and phenolic foam. 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 low tou...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08J9/14C08G8/28
Inventor 陶绪泉王怀生葛祥才陈汪洋崔慧谢倩
Owner LIAOCHENG UNIV
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