Epoxy Vs Vinyl Ester Resin

Structurally epoxy and vinylester are close in properties.

Epoxy vs vinyl ester resin.

Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. It adds excellent strength rigidity adhesion water and chemical resistance. Epoxy vinyl ester resins ver are an important class of high performance thermoset molding resins. The two main types of epoxy resins are bisphenol a diglycidyl ether dgeba and epoxy phenol novolac epn.

The hardener catalyst for vinyl ester resin and polyester resins is mekp. To cover wood a laminate using epoxy resin and 10 oz cloth will yield a much better job than 10 oz. Vinylester resins utilize a polyester resin type of cross linking molecules in the bonding process. It is water resistant.

Polyester resins published on june 5 2018 june 5 2018 13 likes 0 comments. Vinylester resins are stronger than polyester resins and cheaper than epoxy resins. Epoxy resin is an ideal resin for high performance and light weight parts. The vinylester resins are only about 1 3rd as strong as the epoxy.

Epoxy however is much easier to work with and is much more forgiving. However they are primarily used as an aesthetic application to these products. They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins. Vinyl ester resin cures with a tack.

It can withstand repeated bending better than both polyester and epoxy resin. Epoxy does not emit vocs. Cloth and polyester resin. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain.

In conclusion both epoxy and vinylester are much preferred to polyester. In homebuilt airplanes the glasair and glastar kit planes made extensive use of vinylester fiberglass reinforced structures. Vinylester is most often used with fiberglass but is also applied to carbon fiber as an outer cosmetic coating. Vinyl esters also use peroxides e g.

Choosing the appropriate resin epoxy vs. In addition they do not adhere well to either the carbon fiber or kevlar materials. These resins form durable laminates and coatings when fully cured cross linked. Regarding costs vinyl ester resin is more expensive than polyester resin but cheaper than epoxy resin.

Vinyl ester has lower resin viscosity approx 200 cps than polyester approx 500cps and epoxy approx 900cps. Epoxy adheres to wood much better than polyester does.