Non-silicone polymers Can be used in acidic oils such as steam turbine oils and hydraulic oils where silicone polymers lose their defoaming properties after prolonged use. The most commonly used non-silicone polymer lubricants are acrylates and alkyl acrylic acid copolymers. They have good solubility in mineral oil, are not sensitive to blending techniques, and the dosage is rarely 0.001%~0.05%(mass fraction). Anti-foam properties of this kind of antifoaming agent system influence on the existing surface active substance, and the effect of antifoaming agent depends on the product system, so the same kind of surfactant in an oil system has the ability to reduce the bubble, but in other cases may be no antifoaming performance, some occasions have not antifoaming performance, they promote oil generated bubble, Special attention should be paid to this situation in the presence of detergents in lubricating oil systems. Compared with silicone antifoam agents, these antifoam agents can effectively improve the air release of oil products. Because of this kind of non organic silicon polymer antifoaming agent mechanism to partly replace the original surfactant in bubble wrap, which change the membrane layer intermolecular force, make the film strength is reduced, or ductile lower decreased the stability of the foam, achieve the goal of defoaming, therefore contain this kind of organic silicon polymer antifoaming agent of oil in the air can be released in the form of bubble, good air release.
3, compound anti-foaming agent due to the advantages and disadvantages of the above two types of anti-foaming agent, in some cases alone can not meet the performance requirements of oil, so the development of compound anti-foaming agent, by increasing the anti-foaming effect and improve the stability of anti-foaming agent. Most of the compound antifoam agents are the combination of the two kinds of antifoam agents mentioned above, so as to give full play to their respective advantages and meet the requirements of oil performance. In addition, there are non - silicon anti - foam compound.