Epoxy Vinyl Ester Resin Structure

Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain.

Epoxy vinyl ester resin structure.

Bisphenol a based epoxy vinyl ester resins provide high chemical resistance and mechanical strength. They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins. Ve resins are a combination of both polyester resin and epoxy resins best properties. Epoxy vinyl ester resins ver are an important class of high performance thermoset molding resins.

The vinyl groups refer to these ester substituents which are prone to polymerize. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. As the length of the chain is available to absorb impact loads this makes vinyl ester resins more durable and resilient than polyesters. The two main types of epoxy resins are bisphenol a diglycidyl ether dgeba and epoxy phenol novolac epn.

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 esters also use peroxides e g. Vinyl ester ve resins are thermosetting polymers that combine the good chemical mechanical and thermal properties of epoxy resins with the rapid cure of unsaturated polyester resins ve resins have high chemical and hydrolytic resistances good toughness a high modulus and good thermal and electrical insulation properties. The diester product is then dissolved in a reactive solvent such as styrene to approximately 35 45 percent content by weight.