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A kind of preparation method of bio-based phenolic resin for laminated friction brake material

A friction brake material and phenolic resin technology, which is applied in the field of phenolic resin preparation, can solve the problems of insufficient raw material sustainability and poor environmental protection

Active Publication Date: 2021-03-19
GUIYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of bio-based phenolic resin for laminated friction brake materials, which solves the problems of insufficient raw material sustainability and poor environmental protection when the phenolic resin prepared from phenol and formaldehyde in the prior art, And the preparation method is simple to operate, environment-friendly, and production cost is low

Method used

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  • A kind of preparation method of bio-based phenolic resin for laminated friction brake material
  • A kind of preparation method of bio-based phenolic resin for laminated friction brake material
  • A kind of preparation method of bio-based phenolic resin for laminated friction brake material

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Put 1000g of cashew nut shell oil into a vacuum distillation device added with zeolite, and collect the fraction at a temperature of 110°C under a pressure of 500 Pa to obtain light yellow and transparent cashew shell phenol, whose GC spectrum is as follows: Figure 6 shown.

[0043] Get 30.4g (1.0mol) of cardanol and pack in there-necked flask with electric stirring, condensing reflux pipe, thermometer, and add the paraformaldehyde of 60.0g (2.0mol) wherein, and the system is slowly warming up to 65°C, heat-retaining reaction for 1 hour, then add 4.5 g of 20% ammonium hydroxide aqueous solution, and raise the temperature to 85°C, heat-retaining reaction for 3 hours.

[0044] After the reaction was completed, the system was transferred to a rotary evaporator, and the solvent was removed under reduced pressure at a gauge pressure of -0.085 MPa and a temperature of 60°C to obtain a crude product of bio-based phenolic resin. Take 10.0 g of the crude product, then dissolve...

Embodiment 2

[0047] Put 1500g of cashew nut shell oil into a vacuum distillation device added with zeolite, and collect fractions at a temperature of 105°C under a pressure of 300 Pa to obtain light yellow and transparent cardanol.

[0048] The cardanol of 60.8g (2.0mol) is packed in the there-necked flask with electric stirring, condensing reflux tube, thermometer, and the paraformaldehyde of 120.0g (4.0mol) is added wherein, and the system is slowly warming up to 70°C, heat preservation reaction for 1.5h, then add 9.0g of 30% NaOH aqueous solution, and raise the temperature to 85°C, heat preservation reaction for 4h.

[0049] After the reaction was completed, the system was transferred to a rotary evaporator, and the solvent was removed under reduced pressure at a gauge pressure of -0.085 MPa and a temperature of 55° C. to obtain a crude product of bio-based phenolic resin. Take 20.0 g of the crude product, then dissolve the product in 200.0 g of dichloromethane, wash with 5×200.0 ml of ...

Embodiment 3

[0052] Put 2000g of cashew nut shell oil into a vacuum distillation device added with zeolite, and collect fractions at a temperature of 115°C under a pressure of 1000 Pa to obtain light yellow and transparent cardanol.

[0053] Get 45.6g (1.5mol) of cardanol into a three-necked flask with electric stirring, condensing reflux tube, and thermometer, and add 37%wt formaldehyde aqueous solution of 364.8g (4.5mol) wherein, and the system slowly Heat up to 55°C, keep the temperature for 0.5h, then add 9.0g of 50% Ba(OH) 2 aqueous solution, and the temperature was raised to 80°C, and the reaction was kept for 1.5h.

[0054] After the reaction was completed, the system was transferred to a rotary evaporator, and the solvent was removed under reduced pressure at a gauge pressure of -0.085 MPa and a temperature of 65°C to obtain a crude product of bio-based phenolic resin. Take 30.0 g of the crude product, then dissolve the product in 150.0 g of dichloromethane, wash with 3×150.0 ml o...

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Abstract

The invention discloses a preparation method of a bio-based phenol formaldehyde resin for laminated friction brake materials. The preparation method comprises: (1) carrying out pressure reducing distillation on cashew nut shell oil, and collecting the distillate obtained by the distillation to obtain cashew nut shell phenol; (2) mixing the cashew nut shell phenol obtained in the step (1) and a paraformaldehyde or formaldehyde aqueous solution, heating the reaction system, and carrying out a thermal insulation reaction; (3) after completing the thermal insulation reaction, adding an alkali catalyst, heating, and carrying out a thermal insulation reaction to generate a bio-based phenol formaldehyde resin; and (4) dissolving the bio-based phenol formaldehyde resin in methanol or ethanol, andadjusting the solid content to 20-75% to obtain the finished product bio-based phenol formaldehyde resin. According to the present invention, the problems of continuous insufficiency in raw materialsand poor environmental protection in the preparation of the phenol formaldehyde resin from phenol and formaldehyde in the prior art can be solved with the preparation method of the present invention,the preparation method has characteristics of simple operation, environmental protection and low production cost, and the prepared bio-based phenol formaldehyde resin has significantly-improved heat resistance.

Description

technical field [0001] The invention belongs to a preparation method of phenolic resin, in particular to a preparation method of bio-based phenolic resin for laminated friction brake materials. Background technique [0002] The main raw materials of traditional phenolic resins mainly use phenol and formaldehyde from petrochemical resources. With the decrease of petrochemical resources, traditional phenolic resins are facing the defect of continuous shortage of raw material sources. In addition, the use of petrochemical resources has also caused increasingly serious environmental problems, and the free phenol in traditional phenolic resins will also cause additional harm to the environment and users. Therefore, finding biomass raw materials that can replace phenol to prepare bio-based phenolic resins is of great significance for solving the lack of sustainability of traditional phenolic resin raw material sources and the harm of free phenol to the environment and users. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/12
CPCC08G8/12
Inventor 罗军刘渊聂胜强张春梅严伟
Owner GUIYANG UNIV