What is styrene-acrylic emulsion

Styrene-acrylate emulsion (styrene-acrylate emulsion) is made from styrene and acrylate monomer by emulsion copolymerization.Styrene-acrylic emulsion is one of the most studied systems in emulsion polymerization and one of the top ten non-crosslinked emulsions with important industrial application value in the world.Styrene-acrylic emulsion as a kind of important intermediate chemical products, has a very wide range of uses, is mainly used as building coatings, metal surface latex coatings, ground coatings, paper adhesives, adhesives, etc.Styrene-acrylic emulsion has good adhesion, transparent film, good water resistance, oil resistance, heat resistance and aging resistance.Styrene-acrylic emulsion used as paper adhesives, but also with starch, polyvinyl alcohol, sodium carboxymethyl cellulose and other adhesives

Characteristics

The monomer disperses into emulsion polymerization by emulsifier in water, which is called emulsion polymerization.The conventional emulsion polymerization system is mainly composed of monomer, water, water-soluble initiator and water-soluble emulsifier, but the formula used in industry is much more complicated.Emulsion polymerization is often copolymerization, in addition to the main monomer, there may be a second, third monomer.

Advantages of emulsion polymerization:

(1) water as medium, cheap and safe.The latex has low viscosity, which is conducive to heat transfer, transportation and continuous production.

(2) The polymerization rate is fast, and the molecular weight of the product is high, and the polymerization can be carried out at a lower temperature;

(3) It is conducive to the direct use of latex and the production of environmentally friendly products, such as emulsion paint, binder, paper, leather, fabric treatment agent, etc.

Disadvantages of emulsion polymerization:

(1) when solid products are needed, the emulsion needs to go through the processes of coagulation, washing, dehydration and drying, and the cost is high;

(2) emulsifier and other impurities are left in the product, which is difficult to be completely removed, damaging electrical properties, etc

Amber Zhang Ms.

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