Various compounding agents are used in rubber products to improve product performance and improve processing technology. So, what are the commonly used resins? Commonly used resins in rubber include phenolic resin, high styrene resin, petroleum resin, coumarone resin, etc. What are the advantages of these resins and what role can they play in rubber?

1. Characteristics and applications of phenolic resins

Phenolic resin, also known as Bakelite powder, is a colorless or brown transparent solid with the characteristics of high temperature resistance, acid resistance and heat resistance.

Phenolic resin has the functions of reinforcing agent, plasticizer and dispersant in rubber/reclaimed rubber. In rubber products, it can improve the hardness, tensile strength, wear resistance, etc. of the vulcanized rubber of the rubber compound, and can also improve the adhesion between the rubber compound and the metal. The combination of nitrile rubber/recycled rubber and phenolic resin can improve the mechanical properties, compression set and aging resistance of the compound.

2. Characteristics and application of petroleum resin

Petroleum resin has the characteristics of good miscibility, water resistance, chemical resistance, good viscosity adjustment and thermal stability, and low price.

Petroleum resin has good compatibility with rubber and has little effect on rubber vulcanization. It can play the role of tackifying, reinforcing and softening in rubber. Commonly used petroleum resins are C5/C9. The petroleum resin in rubber can improve the processing performance, elongation at break, tear strength, etc. of the rubber compound. Different petroleum resins and different dosages have different properties for vulcanizates.

The C5 petroleum resin in butyl rubber/reclaimed rubber can improve the vulcanization performance of the rubber compound, prolong the scorch time, improve the wettability and viscosity of the rubber compound, reduce the Mooney viscosity, and improve the hardness and tear performance of the rubber compound.

3. Characteristics and application of coumarone resin

Coumarone Indene resin is a light yellow to tan viscous liquid or solid with good compatibility, water resistance, acid and alkali resistance, aging resistance and heat resistance.

Coumarone Indene resin has the functions of softening, reinforcing, plasticizing, tackifying and dispersing in rubber, which can improve the extrusion and calendaring process performance of the rubber compound, and at the same time make the rubber compound have good adhesion and improve the adhesion of the rubber compound. force. rubber compound. strength. rubber compound. gender. Physical and mechanical properties and aging resistance of materials.

In actual production, the amount and type of resin have different effects on rubber. According to the properties of rubber products, select the appropriate resin and blending amount to ensure the properties of the products.