Unsaturated Poly Vinyl Ester Coating

Vinyl ester is a kind of liquid thermosetting resin diluted with Styrene and cured with a free radical initiator. It is mainly formulated through the pre-polymer formed through the reaction between epoxy and Styrene monomer. The special chemical structure of Styrene ester gives it the combined features of strength, flexibility, and anti-corrosiveness. It hardens at both room and high temperatures; these paints belong to the room-temperature type.

Unsaturated Poly Vinyl Ester can be divided into two types according to its characteristics: the normal type and the heat- and strong-acid-resistant type. Generally, the normal type reacts well to corrosion in any kinds of acid and alkali environments under 100℃. Since the heat- and strong- acid-resistant type not only possesses good heat resistance and oxidation resistance, but also has an outstanding solvent resistance under 180℃, both types can be used in anti-corrosion construction with glass flake or fiber mats. (When used with fiber mats, the application is also known as FRP.)

The preserving condition of Unsaturated Poly Vinyl Ester is that it must be preserved under 5℃ to keep the effective period for three months, and the effective period will be shortened (about 12 days in 30℃) if the previous condition is not met. Unsaturated Poly Vinyl Ester is the two-pack type of paint, and the ratio of the curing agent is about 1% to 2%. The base and curing agents must be thoroughly mixed before use, and the pot life is about 25 to 35 minutes (25℃). The mixture will be completely cured after its pot life, and the paint tools must be thoroughly cleaned with special cleansing solvent.