Tungsten Disulfide Modified Phenolic Resin

Phenolic resin refers to a polycondensate synthesized by phenols and aldehydes under the action of an acidic or basic catalyst, which has excellent adhesion, excellent heat resistance, unique ablation resistance and good flame retardancy. Widely used in aircraft and aviation, military equipment, automotive and transportation, construction and other aspects.

However, the phenolic resin itself has certain disadvantages, such as high brittleness and insufficient wear resistance in some application fields, which limits its wider application to some extent. In recent years, new modified phenolic resins, such as tungsten, have been continuously developed through various composite processes, doping metals, compounds and nanoparticles in resins.

Some scholars have designed a tungsten disulfide modified phenolic resin with many advantages, such as corrosion resistance, wear resistance, high lubricity, etc. The synthesis process is as follows:

1)300 g phenol and 1.5 g oxalic acid were added into four flasks with mechanical stirring, condenser and thermometer. The oil bath was heated to 85 ℃, supplemented by strong stirring.

2)160g formaldehyde and 1g tungsten disulfide were added into four flasks equipped with mechanical stirring, ultrasonic device, condenser and thermometer. Strong mechanical stirring and ultrasonic wave were used to disperse tungsten disulfide evenly.

3) The homogeneous mixture of tungsten disulfide and formaldehyde obtained in step 2 was added into the mixture obtained in step 1, and the reaction temperature was 85 ℃ for 3 hours.
4) 65 g formaldehyde and 0.9 g oxalic acid were added, and the reaction temperature was raised to 95 ℃ for 2 hours

4) NaOH solution was used to adjust PH to neutrality. After 10 minutes of strong stirring, vacuum dehydration was carried out. Vacuum was 0.07-0.09MPa. When the temperature reached 140-170 ℃, the material was discharged.

5)The obtained thermoplastic phenolic resin was crushed to 200-400 meshes by a pulverizer.

The obtained tungsten disulfide modified phenolic resin has excellent corrosion resistance, wear resistance, lubricity and surface finish. It can be used in high performance wear resistant materials, coated sand, abrasive materials and high temperature abrasive tools.

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