Principle for the Synthesis of Waterborne Acrylic Resin

Waterborne acrylic resins are usually copolymerized by acrylic acid, methacrylic acid, and their esters or other derivatives, whose properties can be tailored by regulating the compositions the ratio of various monomers, and the structure of raw materials.

There are many ways to synthesize waterborne acrylic resins (including emulsion, solution polymerization, bulk polymerization, and suspension polymerization), of which emulsion polymerization is the most widely used.

It is synthesized by monomers, emulsifiers, water, and initiators. The synthetic macromolecular chain is mainly composed of a carbon chain, which is divided into a soft segment and a hard segment.

The hard segment is mainly composed of hard monomers (methacrylate, styrene, etc.), which can improve the hardness of the resin, and the soft segment mainly contains soft monomers such as acrylate, which can provide flexibility for the resin.

The structure and composition of the resin framework affect the product performance.

Other functional monomers are often used to copolymerize to provide different performance.

Some unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, etc. are selected in the monomers of the carboxyl group, or the hydrophilic groups such as hydroxyl group, amide group, or ether bond are introduced to ensure the water solubility of the waterborne resin.

Meanwhile, the acrylic was used to enhance the emulsion stability and the physical cross-linking via ionic clusters after the film formation.

The addition of styrene and acrylonitrile can increase the impact resistance, wear resistance, and mechanical properties of the resin.?

The ring structure or benzene ring can improve the mechanical properties of the resin, such as glycidyl methacrylate.

2-Ethylhexyl acrylate and other long-chain alkanes can be selected to receive the flexible coating.