A polymer pour point depressant is a substance that lowers the melting point of a polymer and inhibits its crystallization. Some common polymer pour point depressants include fatty acid metal salts, fatty acid esters, fatty alcohols, etc.
Polyethylene is a widely used pour point depressant. It has a low melting point and good fluidity, which can effectively reduce the melting point of the polymer. In polyvinyl chloride products, adding an appropriate amount of pour point inhibitor can reduce the processing temperature and melt viscosity, improve fluidity, and facilitate the processing process.
The main functions of pour point inhibitors include inhibiting the occurrence of pour point phenomena, maintaining the stability of polymers, and reducing low-temperature brittleness.
Different polymer ratios have different effects on the performance of pour point depressants.
Pour point depressants are polymers added to lubricating oils to lower the pour point, which is the lowest temperature at which the oil can flow. The purpose of these polymers is to prevent the formation of wax crystals in the oil, which can cause the oil to thicken and become less effective at low temperatures. Some common polymer types used as pour point depressants include:
- Polyalkyl methacrylate
- Polyisobutylene
- Ethylene propylene copolymer
- Polyelectrolytes
- Polyacrylate
6.Polyacrylamide
These polymers are usually added at smaller concentrations (usually less than 1%) to achieve the desired pour point reduction. They effectively lower the pour point of the lubricant by several degrees Celsius, making it more suitable for use in cold environments or during cold engine starts.