Modified phenolic resin material and application thereof

A phenolic resin and modification technology, applied in the field of materials, can solve the problems of adverse effects on the environment and human health, inability to fully utilize resources, unfavorable cost reduction and efficiency increase, etc., achieve good sound absorption and sound insulation performance, simple manufacturing process, and low cost Effect

Active Publication Date: 2017-06-13
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, old insulators need to be replaced regularly in large quantities due to factors such as aging and electric leakage. Most of the waste composite insulators are piled up randomly, which not only makes the resources unable to be fully utilized, is not conducive to cost reduction and efficiency increase, but also endangers the environment.
[0003] Phenolic resin refers to the resinous polymer formed by polycondensation of phenol and aldehyde in the presence of an acidic or basic catalyst. Phenolic resin material is an excellent fireproof, heat preservation, noise-proof, lightweight and energy-saving material. Therefore, it can be used as a sound-absorbing material. The material is widely used, but the existence of free formaldehyde in the material has adverse effects on the environment and human health
[0004] To sum up, the traditional phenolic resin material is a good sound-absorbing, sound-insulating, and noise-proof material, but its application is greatly limited due to the free formaldehyde contained in the material.

Method used

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  • Modified phenolic resin material and application thereof
  • Modified phenolic resin material and application thereof
  • Modified phenolic resin material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of preparing modified phenolic resin material of the present invention is as follows:

[0044] 1) Get 40g of phenol, 40g of formaldehyde, and 15g of sodium hydroxide, wherein the sodium hydroxide is configured into an aqueous solution with a mass fraction of 30%, and the three are mixed and added to a three-necked flask with an existing magnetic rotor. Heat to about 95°C within 20 minutes and react at a constant temperature for 30 minutes, then cool down to 75°C. At this time, the mixture is viscous, and its viscosity is measured in the range of 200-300Pa·s (measured at 20°C) to obtain a mixture;

[0045] 2) Add 15g of insulator silicon rubber micropowder to the mixture obtained in step 1) and mix them evenly under magnetic stirring conditions, then add 9g of modified montmorillonite; simultaneously add 10-20g of formaldehyde and 5g of sodium hydroxide to quickly Stir well, adjust the reaction temperature to about 85°C, measure the viscosity of th...

Embodiment 2

[0049] The preparation method of preparing modified phenolic resin material of the present invention is as follows:

[0050] 1) Get 200g of phenol, 20g of formaldehyde, and 60g of sodium hydroxide, wherein the sodium hydroxide is configured into an aqueous solution with a mass fraction of 30%, and the three are mixed and added to a three-necked flask placed with a magnetic rotor, and heated at a constant temperature under the action of a mechanical stirrer. React in a water bath at 90°C for 35 minutes, change the constant temperature condition to 75°C, and measure the viscosity of the mixed thick product in the range of 200-300Pa·s (measured at 20°C) (when the viscosity does not meet the conditions, continue to heat up at about 95°C response, followed by measurement);

[0051] 2) To the mixture obtained in step 1), add 70 g of insulator silicon rubber micropowder successively under magnetic stirring conditions and mix evenly, then add 40 g of modified montmorillonite; simultan...

Embodiment 3

[0057] Determination of free formaldehyde content in resin: Accurately weigh 3g of commercially available phenolic resin material (marked as comparative example) and Example 1 and Example 2 respectively, put them into a beaker, add 25mL of ethanol and 25mL of distilled water and stir to mix evenly. Add 0.05 mol / L hydrochloric acid dropwise under stirring until pH = 4.0 (accuracy is 0.1), add 20 mL of 10% mass fraction of hydroxylamine hydrochloride solution, continue stirring for 5 min, and titrate to pH with 0.1 mol / L sodium hydroxide standard solution =4.0, while doing a blank experiment, the content of free formaldehyde in the phenolic resin can be calculated.

[0058] The formula is as follows:

[0059] X=C×(V-V 0 )×(0.03003) / M×100%

[0060] In the formula: X——the content of free formaldehyde in phenolic resin, %;

[0061] V——the volume of sodium hydroxide standard solution consumed by the sample, the mL sample is the comparison group and embodiment 1 and embodiment 2; ...

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Abstract

The invention belongs to the field of materials, and in particular to a modified phenolic resin material which is prepared from a hot-melting phenolic resin mixture by foaming and curing; the phenolic resin mixture comprises hot-melting phenolic resin, insulator silicon rubber micro powder, a foaming agent, a curing agent, modified montmorillonoid, hexamethylenetetramine, and a coupling agent. By adopting the modified phenolic resin material provided by the invention, the technical defects that conventional phenolic resin has a relatively large number of free formaldehyde can be effectively solved, meanwhile the modified phenolic resin has good sound insulation properties, and in addition, a preparation method has the advantages of being simple in process and low in cost.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a modified phenolic resin material and its application. Background technique [0002] Compared with traditional composite insulators such as ceramics and glass, silicone rubber insulators have many advantages such as light weight, high strength, and strong pollution flashover resistance. It played an important role. However, old insulators need to be regularly replaced in large quantities due to factors such as aging and leakage. Most of the waste composite insulators are piled up randomly, which not only makes it impossible to fully utilize resources, is not conducive to reducing costs and increasing efficiency, but also endangers the environment. [0003] Phenolic resin refers to the resinous polymer formed by polycondensation of phenol and aldehyde in the presence of an acidic or basic catalyst. Phenolic resin material is an excellent fireproof, heat preservation, noise-proof, lightw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L83/04C08K13/06C08K9/06C08K3/34C08K7/00C08K5/42C08K5/5435C08J9/06C08J9/04C08J9/10
CPCC08J9/04C08J9/06C08J9/102C08J2203/04C08J2203/18C08J2361/06C08J2483/04C08K2201/003C08K2201/011C08L61/06C08L2201/02C08L2201/08C08L2203/14C08L83/04C08K13/06C08K9/06C08K3/346C08K7/00C08K5/42C08K5/5435
Inventor 李丽张凯刘新苗周永言刘嘉文陈敏
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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