Rubber Chem Encyclopedia

Three anti-aging agents commonly used in acid and alkali resistant hoses

Create Date:2019-05-24 09:11:08Click volume:104
Three anti-aging agents commonly used in acid and alkali resistant hoses

The so-called acid and alkali resistant hose is a rubber hose used to transport acid and alkali solutions. It can be divided into acid and alkali resistant rubber hoses and acid and alkali resistant rubber hoses. In actual production, acid and alkali resistant hoses use a certain proportion of regeneration. Glue can reduce the cost of raw materials and improve the aging resistance of rubber compounds, thus prolonging the performance and service life of acid and alkali resistant hoses. However, if you want to significantly improve the aging resistance of acid and alkali resistant hoses, relying solely on reclaimed rubber is not enough. Rubber anti-aging agents are essential. Which anti-aging agents can be used in acid-resistant hoses?

1. Anti-aging agent A

Anti-aging agent A is an anti-aging agent. It is a yellow-brown to purple crystalline block at room temperature. It is a general-purpose anti-aging agent. It has good resistance to heat, oxygen, flexing, weather and fatigue aging. The inhibition effect is easy to disperse in the rubber compound, has no obvious influence on the processing property of the rubber compound and the physical and mechanical strength of the vulcanized rubber. It is the preferred anti-aging agent product in the production of acid and alkali resistant rubber hoses, and is in the acid and alkali resistant rubber hose containing styrene butadiene rubber. It can also act as a stabilizer, which can significantly delay the aging time of acid and alkali resistant hoses.

2. Anti-aging agent D

Anti-aging agent D is N-phenyl-β-naphthylamine (D), which is a kind of anti-aging agent for heat-resistant aging and fatigue-resistant aging which is commonly used in the production of rubber products; since the acid-resistant hose itself has poor heat resistance, The use of a small amount of anti-aging agent D in the protective system can improve the heat aging resistance of the rubber compound, thereby improving the heat resistance of the acid and alkali resistant hose, expanding the operating temperature range, and prolonging the use time.

3. Protective wax

The protective wax is a mixture of a saturated linear hydrocarbon refined wax and a saturated isomerized hydrocarbon microcrystalline wax. When the amount of the compound is higher than the solubility in the rubber, the vulcanization migrates to the surface of the rubber product to form a physics. Protective film to prevent ozone cracking. Chemical anti-aging agents are often used in acid and alkali resistant hoses. The solubility of chemical antiozonants in waxes is higher than that in rubber. The migration speed of wax in rubber is faster than that of chemical antiozonants, and it can also promote chemical antioxidants. Diffusion improves the ozone crack resistance of acid and alkali resistant hoses under dynamic and static conditions.

Generally, the anti-aging agent A or the anti-aging agent D is generally used in the acid-resistant and alkali-resistant hose for conveying the dilute acid and the dilute alkali solution. In the concentrated acid-resistant concentrated alkali hose, the above three anti-aging agents are used in combination to further delay the acid and alkali resistant hose. Aging time and extended service life.