What are the new varieties of emulsions

As the base material of emulsion paint, the synthesis technology has made rapid progress. Different new types of emulsions are synthesized by different polymerization methods, which can meet the new requirements of the continuous development of architectural coatings. (1) Soap-free emulsions use polymerizable or decomposable surfactants instead of emulsifiers to reduce the influence of low-molecular emulsifiers and improve the performance of the emulsion. (2) Layered structure or core/shell structure composite emulsion. The particles of this type of emulsion are distributed in symmetrical layers with the core as the center, so that the physical properties of the final polymer surface can be freely changed without changing the composition of the raw materials. Purpose, broaden the scope of application of the product. (3) Gradient dripping power feeding method polymerization emulsion power feeding method is a new type of emulsion polymerization process developed in foreign countries in recent years. The obtained polymer particle structure is similar to the commonly used equal ratio uniform feeding method or core/shell The structure of the type emulsion is different, and it changes in a gradient. Its characteristic is that under the same formula, by changing the feeding procedure, a polymer emulsion with excellent performance can be prepared. (4) Organic-inorganic composite polymer emulsion "This emulsion introduces inorganic substances with unique properties into the emulsion polymerization and becomes a graft copolymer, which has the dual advantages of organic materials and inorganic materials. (5) Interpenetrating network polymer emulsion (LIPN).
　　 This type of emulsion is a latex compound of submicroscopic polymer synthesized by a multi-step emulsion polymerization method. The colloidal particles also have a core/shell structure or a layered structure, the difference is that the network itself also has a certain degree of cross-linking, because the polymer chains between the core/shell layers can penetrate each other within a considerable range, which can make it behave in many aspects. Outstanding performance can meet the needs of some special coatings.