Degreasing According to the type and nature of grease, the degreasing agent contains two main components, alkaline builders and surfactants.
1.Alkaline builder
Alkali alkaline builders commonly used are sodium hydroxide, soda ash, sodium silicate and sodium tripolyphosphate. Sodium hydroxide and soda ash are the cheapest, and the wastewater is more difficult to treat. Sometimes the cleaning objects are damaged due to strong alkalinity. On the other hand, sodium hydroxide and soda ash have no emulsification effect on mineral oil cleaning;
Sodium silicate and sodium tripolyphosphate can provide both alkalinity and emulsifying power. They are widely used in various degreasing cleaners, especially alkali-sensitive degreasing processes. The biggest drawback of using sodium silicate is that if you do not wash it with hot water after degreasing, it is difficult to completely wash the residual sodium silicate by direct cold water washing. The residual sodium silicate will react with the acid of the next process to form a strong adhesion Silica gel, which affects the adhesion of the coating; sodium tripolyphosphate is mainly concerned with phosphorus pollution and environmental damage.
2. Surfactant
Surfactant is the most important component of degreasing agent. The early degreasing agent mainly emulsified the emulsifier, such as fatty alcohol polyoxyethylene ether (AEO) series, alkylphenol polyoxyethylene ether (TX, NP) ) Series, etc. Excessive use of emulsifier will emulsify and dissolve the oil that has fallen off into the working fluid, resulting in a gradual decrease in the degreasing ability of the working fluid, requiring frequent replacement of the working fluid.
However, as the price of surfactants rises, it is increasingly required to reduce the amount of surfactants used and increase the rate of degreasing. This requires the degreasing agent to have good dispersion and anti-secondary deposition properties. Peel off from the metal surface, do not emulsify or saponify in the solution, just float on the surface of the solution, keep the bath liquid clear and continuous degreasing ability, here to share with you a surfactant is XM665T, XM665T as the surface activity The cleaning agent equipped with the agent has a significant effect on cleaning heavy oil, black carbon and other dust and dirt! Outstanding performance in automobile engine cleaning, metal working fluid and heavy dirt cleaning industry! Give play to the dual benefits of environmental protection and economic benefits in replacing solvent-based cleaning agents!
On the other hand, surfactants suitable for degreasing are generally non-ionic products. Non-ionic products are generally more expensive. In order to reduce the cost of degreasing agents, anionic products will also appear in the formulation of degreasing agents, especially At the same time, it is an anionic surfactant with non-ionic properties, fatty acid methyl ester ethoxylate sulfonate (FMES), which has excellent "dispersion and roll-off" characteristics, which is helpful for non-emulsified peeling and removal of grease.
Shaoxing Shangyu Simo Research institute of organic Chemistry
Address: Room 1202, Jincheng Building, Shangyu City, Zhejiang Province, China
Tel: 0086-575-82639019
M/P: 008613857527142
E-mail: shenyuan@simochem.com
