The automotive and electronics industries are among the world's core manufacturing industries. Government legislation vigorously promotes light and low fuel consumption passenger cars, and promotes the continuous development of automotive aluminum castings. According to statistics, in 2016, the US automotive aluminum castings market has exceeded 26 billion US dollars. Common automotive aluminum alloy castings include engine casings, transmission housings, hub components, brackets, and engine cylinder heads with complex structures. The lightweighting of body and structural components is driving the growth of new aluminum alloy castings in the future. Power, especially for large machines of more than 3,000 tons, the molding time of aluminum castings has been greatly extended, which poses a challenge to the higher temperature resistance requirements of conventional die-casting.














The body material of the smart phone, from the flagship machine to the thousand yuan machine, most of which abandoned the plastic material, the metal body began to spread! Aluminum alloy is the most common among the metal machine models of well-known brand manufacturers, and die-casting is still the mainstream processing technology. Mobile aluminum castings, magnesium alloy notebook casings and other consumer electronics magnesium/aluminum castings are moving toward lighter, thinner, more temperature-resistant, and more complex patterns.














What is a die casting release agent?
The die-casting release agent is a kind of separator between the mold and the finished product, which prevents the metal mold from sticking to the mold and acts as a kind of processing aid which is easy to get rid of the action.






The commonly used die-casting release agents can be divided into three types according to the product form, water-based, oil-based and powder-like release agents, wherein the water-based release agent has good cooling effect, no pollution, smooth surface of the casting, and is convenient for automation. Advantages are widely used.






The water-based release agent is generally composed of five components, mineral oil, ester oil, alkyl phenyl silicone oil, wax, and surfactant. Each component provides its own specific function, so that the formulation achieves a good overall performance. Meet the use of machines with different tonnages. Among them, mineral oil and ester oil have excellent intermetallic lubrication properties, and waxes, especially polyethylene waxes, have moderate heat resistance and excellent wetting ability. Alkyl phenyl silicone oil is the core material in the die-casting release agent. It is excellent in heat resistance and carbonization, which helps to support the entire formulation to keep the metal product and the mold isolated during the die-casting process.






Alkyl phenyl modified silicone oil, excellent post-coating
Alkyl phenyl modified polysiloxanes have the high temperature resistance of similar silicone products without affecting the post-coating properties of the products. In recent years, they have been widely used in water-based die-casting release agents.






Alkyl phenyl silicone oil is a kind of modified silicone oil which has both high heat resistance of dimethyl silicone oil and excellent compatibility with carbon-containing compounds. It is well known that dimethyl silicone oil is a hybrid polymer in which Si-O-Si is the main chain and the pendant group is methyl and terminated with a methyl group. Due to the large Si-O-Si bond energy and long bond length, it gives the dimethyl silicone oil high temperature resistance and low surface tension. At the same time, due to the difference between its molecular structure and traditional organic matter, it is compatible with most organic substances. The compatibility is poor, which is also the main reason for the poor coating performance of castings based on such release agents.