First, resin reaction temperature standard

The reaction temperature of resin is an important process parameter, which has great influence on the reaction rate, physical properties and chemical stability of resin. In general, the resin reaction temperature should be determined according to different resin types and catalyst types. The following are some commonly used resin reaction temperature standards:

1.Phenolic resin: usually reacts around 150°C.

2.Epoxy resin: The commonly used reaction temperature is 80-140°C.

3.Polyurethane resin: the reaction temperature is generally 60-120°C.

4.Unsaturated amino resin: the reaction temperature is between 20-80°C.

Second, the factors affecting the resin reaction temperature

In addition to the type of resin and the type of catalyst, there are other factors that affect the reaction temperature of the resin. Here are some common contributing factors:

1.Resin types: Different resin types have different temperature requirements, and for some resins with good heat resistance, such as epoxy resins, the temperature requirements are relatively high.

2.Catalyst: Different catalysts have different requirements for different resin reaction temperatures. For example, some catalysts need to react at higher temperatures to function, while others need lower temperatures.

3.Filler: In the resin reaction, although the filler can not undergo chemical reaction, it will also affect the reaction rate and temperature requirements.

4.pH value of the reaction system: Different pH values will affect the reaction temperature.

Third, resin reaction temperature adjustment methods and precautions

In the resin reaction, temperature regulation is a very important link. The specific adjustment methods and precautions are as follows:

1.Select the catalyst reasonably, and determine the best reaction temperature according to the nature of the catalyst and the type of resin.

2.Control the quality and particle size of the filler so as not to affect the mass transfer rate of the reaction system.

3. Properly adjust the pH value of the reaction system.

4.Control the solution concentration of the reaction system to avoid overheating due to high concentration.

In short, it is very important to choose a reasonable reaction temperature in resin reaction. According to the different resin and catalyst types, we can determine a more reasonable reaction temperature. At the same time, it is also necessary to pay attention to the above adjustment methods and precautions in the reaction process to ensure the effectiveness and stability of the reaction.