Vinyl Ester Resin Structure

Vinyl ester resins offer increased strength corrosion resistance and durability and are used in a wide variety of applications.

Vinyl ester resin structure.

Vinyl esters also use peroxides e g. As the length of the chain is available to absorb impact loads this makes vinyl ester resins more durable and resilient than polyesters. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Polives resins special chemical backbone with hydroxyl functionality at the end of chain offers very good wetting of glassfibers carbon and aramide fibers.

To make them more workable they are typically dissolved in a vinyl monomer and occasionally a solvent 1 together with an appropriate organic peroxide. 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. While vinyl ester resins are classified as polyester based formulations they are actually an intermediate between a polyester backbone and epoxy terminations on the ends of the molecules. The diester product is then dissolved in a reactive solvent such as styrene to approximately 35 45 percent content by weight.

Vinyl ester monomer contains two vinyl end groups that allow cross linked structure to form during the reaction. 2 the mixture is poured sprayed or molded into the final product and then converted into a thermoset by heating. Unsaturation at the end of the structure provides for a full cure to obtain optimum properties. Vinyl ester resin or often just vinyl ester is a resin produced by the esterification of an epoxy resin with acrylic or methacrylic acids.

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. Chemical structure of the vinyl ester resin monomer. More fatigue resistant than standard epoxy vinyl ester resins. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain.

It is also useful in hot wet fluegas environments where. It exhibits a corrosion resistance similar to derakane 470 resins in most environments. Derakane 510n resin is brominated epoxy novolac vinyl ester resin that offers a moderate degree of fire retardance1. The vinyl groups refer to these ester substituents which are prone to polymerize.

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.