Petroleum based softener is one of the most commonly used softeners in the production of recycled rubber products, because of its good plasticizing effect, rich sources and low cost. Petroleum based softeners mainly include alkane oil, aromatic oil, naphthenic oil, machine oil, transformer oil, etc. Different types of softeners have different effects on the properties of recycled rubber compound and the use performance of finished products, and their pollution is different; The influence of petroleum softeners on the properties of rubber compound and finished product mainly depends on their composition and properties.
In actual production, the plasticizing effect of alkanes and cycloalkanes on recycled rubber compound is greater than that of aromatic hydrocarbons. The higher the content, the more obvious the plasticizing effect; It can improve heat generation, elasticity and cold resistance of reclaimed rubber vulcanizate. Aromatic hydrocarbons can increase the adhesion of recycled rubber compound and keep the strength of vulcanizate high.
1. Function and pollution of alkane oil in reclaimed rubber products
Paraffin oil, namely paraffinic oil, has good cold resistance and has no adverse effect on the elasticity and heat generation of recycled rubber compound; Paraffin oil has good compatibility with ethylene propylene reclaimed rubber and butyl reclaimed rubber, but poor compatibility with tire reclaimed rubber, latex reclaimed rubber, isoprene reclaimed rubber, etc., but has little effect on the mechanical properties of the rubber compound; It has little pollution and can be used in light color recycled rubber products. Paraffin oil can be used in the production of most reclaimed rubber products, and the amount should be controlled within 15 phr. The amount of paraffin oil in ethylene propylene reclaimed rubber and butyl reclaimed rubber products can be appropriately increased.
2. Function and pollution of aromatic oil in recycled rubber products
The compatibility of aromatic oil and reclaimed rubber is good, and it is not easy to spray out of the product surface; Compared with paraffinic oil and naphthenic oil, it has better processing performance, and its dosage in rubber compound is higher than the latter two. As operating oil and filling oil, it can be widely used in the production of various recycled rubber products, with the dosage of more than 30 parts. It should be noted that the use of aromatic hydrocarbon oil will have a certain impact on the physical properties of the reclaimed rubber, which is polluting. It is recommended to be used in the production of dark colored reclaimed rubber products.
3. Function and pollution of naphthenic oil in recycled rubber products
The role of naphthenic oil in the production of reclaimed rubber products is among that of alkane oil and aromatic oil. When it is used as processing oil, softening oil and filling oil in reclaimed rubber products, its pollution is less than that of aromatic oil.
4. Function and pollution of machine oil in recycled rubber products
Machine oil is a brownish oil like substance prepared from natural oil lubricating oil distillate through dewaxing (acid-base treatment) and clay contact treatment. It is pollution-free, belongs to lubricating softener, and has good process performance. It is mainly used in the production of latex reclaimed rubber, tire reclaimed rubber, butadiene reclaimed rubber and other rubber products. The amount should not exceed 15 parts; Too much machine oil will spray out of the surface, affecting the adhesion of recycled rubber products.
5. Function and pollution of petroleum asphalt in recycled rubber products
Petroleum asphalt is a solvent softener, which can improve the viscosity and stiffness of the recycled rubber compound, improve the extruding performance of the rubber compound and the water expansion resistance of the vulcanizate, and has a certain reinforcement effect on the recycled rubber 2ELYY118 products; The dosage is generally 5-10 portions. After the reaction of petroleum asphalt with sulfur, insoluble substances will be formed, which has the effect of delaying vulcanization; It is polluting and is not recommended to be used in light colored recycled rubber products.
The commonly used petroleum softeners in the production of reclaimed rubber products include transformer oil, industrial vaseline, third line oil, etc. The transformer oil is pollution-free, and the transformer oil can be used in the production of insulating rubber products with recycled rubber; Industrial Vaseline is less polluting and can be used for light colored recycled rubber products to improve the extruding performance of rubber, improve the adhesion among rubber and metal, and also act as an antioxidant; The amount of the third line oil in the recycled rubber products is generally 5-10 phr, which can improve the abrasion resistance and abrasion resistance of the recycled rubber vulcanizate. Later, Xiaobian will continue to share with you the application skills of other types of softeners in the production of recycled rubber products.
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