Experience of producing redispersible emulsion powder

We all know that the most important factors for the performance of redispersible latex powder are the selection of monomers and the introduction of functional monomers. So what problems should we pay attention to in the production process? Or what are the details that we ignore.

The first point is the selection and dosage of emulsifier and initiator

The selection and dosage of emulsifier and initiator should be analyzed according to the specific situation before deciding what kind of emulsifier and initiator to use and how much to use. In the process of polymerization and storage, emulsifier plays an important role in stability, so anionic emulsifier or anionic-f emulsifier and non-ionic emulsifier with higher emulsification efficiency are generally selected. However, the presence of emulsifier will reduce the gloss, adhesion and mechanical properties of the film, and the presence of hydrophilic groups will reduce the water resistance of the film. In addition, the application of emulsion containing emulsion in cement mortar will introduce bubbles, thus affecting the mechanical properties of cement mortar. This requires minimizing the amount of emulsifier on the premise of ensuring emulsification and stability efficiency. Initiators play an important role in the whole polymerization process. Different initiators have different molecular structures and properties.

Chuang Yao Biological Technology Co., Ltd. through the acrylic copolymer emulsion system research and continuous testing found that acrylic polymer emulsion system using water-borne persulfate as initiator, the dosage is 0.2% of the total monomer. When the dosage of initiator is 0.2%, the effect is better. When O.4%, the acrylate copolymer emulsion prepared is blue phase, and the emulsion particle has small particle size, uniform distribution and good stability. In the production of redispersible latex powder for different purposes, we should pay attention to these two points to ensure a higher performance while saving cost.

The second point is the design of latex particles

In the production of redispersible latex powder, latex particles are used to prepare latex particles with soft core and hard shell. The main reason is that the latex particles of the hard core shell make the emulsion spray dry at higher drying air temperature, which can produce redispersible latex powder with good redispersibility and water resistance.

The key technical personnel of chuangyao Biotechnology Co., Ltd. are constantly trying and groping. At the same time, they are also sharing with the industry of Everbright. They are more welcome to discuss the production technology of redispersible latex powder in chuangyao Biotechnology Co., Ltd.