Vinyl Ester Resin Structure

To make them more workable they are typically dissolved in a vinyl monomer and occasionally a solvent 1 together with an appropriate organic peroxide.

Vinyl ester resin structure.

Vinyl ester is dissolved in a monomer or reactive diluent usually styrene the result is a low viscosity liquid having a solids content of 36 39. 2 the mixture is poured sprayed or molded into the final product and then converted into a thermoset by heating. The vinyl groups refer to these ester substituents which are prone to polymerize. As the length of the chain is available to absorb impact loads this makes vinyl ester resins more durable and resilient than polyesters.

Vinyl esters also use peroxides e g. Vinyl ester resins offer increased strength corrosion resistance and durability and are used in a wide variety of applications. The molecular structure of vinyl ester resins is similar to that of polyesters but differs primarily on the location of their reactive groups which are positioned only at the ends of the chains. Vinyl ester resins are relative viscous low molecular weight prepolymers.

Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. The special chemical backbone of vinly ester resins prevent hydrolysis of ester groups. The diester product is then dissolved in a reactive solvent such as styrene to approximately 35 45 percent content by weight. It is also useful in hot wet fluegas environments where.

Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. The material is therefore sometimes used as a barrier or skin coat for a polyester laminate that is to be immersed in water such as in a boat hull. Derakane 510n resin is brominated epoxy novolac vinyl ester resin that offers a moderate degree of fire retardance1. More fatigue resistant than standard epoxy vinyl ester resins.

Chemical structure of the vinyl ester resin monomer. It exhibits a corrosion resistance similar to derakane 470 resins in most environments. Vinyl ester monomer contains two vinyl end groups that allow cross linked structure to form during the reaction. Unsaturation at the end of the structure provides for a full cure to obtain optimum properties.

With the reduced number of ester groups in a vinylester when compared to a polyester the resin is less prone to damage by hydrolysis.