Epoxy Vs Vinyl Ester Resin

In homebuilt airplanes the glasair and glastar kit planes made extensive use of vinylester fiberglass reinforced structures.

Epoxy vs vinyl ester resin.

Vinylester resins utilize a polyester resin type of cross linking molecules in the bonding process. Vinylester resins are stronger than polyester resins and cheaper than epoxy resins. Polyester resins published on june 5 2018 june 5 2018 13 likes 0 comments. Structurally epoxy and vinylester are close in properties.

To cover wood a laminate using epoxy resin and 10 oz cloth will yield a much better job than 10 oz. They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins. Vinyl esters also use peroxides e g. Epoxy does not emit vocs.

Regarding costs vinyl ester resin is more expensive than polyester resin but cheaper than epoxy resin. It adds excellent strength rigidity adhesion water and chemical resistance. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Epoxy however is much easier to work with and is much more forgiving.

The vinylester resins are only about 1 3rd as strong as the epoxy. 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. Cloth and polyester resin.

Epoxy adheres to wood much better than polyester does. In addition they do not adhere well to either the carbon fiber or kevlar materials. Choosing the appropriate resin epoxy vs. It can withstand repeated bending better than both polyester and epoxy resin.

These resins form durable laminates and coatings when fully cured cross linked. Epoxy vinyl ester resins ver are an important class of high performance thermoset molding resins. Vinyl ester has lower resin viscosity approx 200 cps than polyester approx 500cps and epoxy approx 900cps. Vinylester resins utilize a polyester resin type of cross linking molecules in the bonding process.

Vinylester is most often used with fiberglass but is also applied to carbon fiber as an outer cosmetic coating. Epoxy resin is an ideal resin for high performance and light weight parts. Vinylester is essentially a styrene modified epoxy resin. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain.

Vinyl ester resin cures with a tack. In conclusion both epoxy and vinylester are much preferred to polyester.