Rubber Chem Encyclopedia

Softening plasticizer and dosage for nitrile rubber

Create Date:2019-03-18 08:57:51Click volume:178
Softening plasticizer and dosage for nitrile rubber

When using nitrile rubber to produce rubber products, the softening plasticizer can improve the plasticity, fluidity, softness and wear resistance of the rubber; however, there are many kinds of nitrile rubber products, and the basic performance requirements of different products are different, such as nitrile rubber. Which plasticizers should be used in the production of cold-resistant rubber products, can you use the above mentioned? How much should softening plasticizer be used in nitrile rubber? Does the amount of softening plasticizer in the nitrile rubber product formulation containing nitrile reclaimed rubber need not be adjusted?

3 Nitrile rubber can not only be used to produce oil-resistant rubber products, but also often used in products with high requirements for cold resistance, such as oil-resistant and cold-resistant hoses, nitrile rubber is the best choice. Among the many plasticizers, dioctyl sebacate is a typical cold-resistant plasticizer, which has good compatibility with nitrile rubber. It improves the processing technology of the rubber compound and significantly improves the cold resistance of nitrile rubber products. Heat resistance, light resistance and electrical insulation; dioctyl diacid and dioctyl sebacate have similar effects in nitrile rubber.

4 black and white grease resistance to extreme pressure performance, can also be used in the production of nitrile rubber products, improve the viscoelasticity of the rubber in the extruded product while reducing the shrinkage of the rubber material, to ensure the smooth surface of the product; but the increase of grease It also reduces the physical and mechanical strength, heat resistance and aging resistance of nitrile rubber products, and needs to be controlled.

5 polyester plasticizer has high molecular weight, low volatility, small migration, oil and water resistance, strong heat resistance and durability in nitrile rubber, and can improve the processing technology of rubber compound as nitrile rubber plasticizer. In the process of use, its viscosity is too large, softening effect and low temperature resistance; the nitrile rubber has solid nitrile rubber and liquid nitrile rubber, and the use of a small amount of liquid nitrile rubber in the solid rubber can improve the glue. Material processing technology performance, prevent extraction.

3. Application skills of plasticizers in nitrile rubber products (including basic dosage and special varieties)

Different types of plasticizers have different roles in nitrile rubber products, and there are certain differences in the basic amounts. In general, the amount of plasticizer in the nitrile rubber product should be controlled between 10-30 parts, but in order to eliminate the influence of plasticizer on the mechanical strength of the rubber material such as tensile strength, the amount of coumarone resin should be controlled. In about 10 parts, the black and white oil is controlled between 5-20 parts.

Nowadays, many nitrile rubber products manufacturers will add a certain proportion of nitrile reclaimed rubber to the formula to reduce the production cost. Sometimes, the nitrile rubber can be completely replaced with nitrile reclaimed rubber, because of the nitrile reclaimed rubber and nitrile. The molecular structure characteristics of rubber are different. The plasticity and fluidity of the nitrile reclaimed rubber are better. Therefore, it is necessary to adjust the amount of each plasticizer in the softening plasticizing system reasonably, if necessary, it can be appropriately reduced, or several can be used together, especially For nitrile rubber products that require high mechanical strength and plasticizers that have an effect on the physical and mechanical properties of the compound.