Vinyl Ester Over Epoxy

Wash away amine blush with water and an abrasive pad such as a 3m 7447 hand pad.

Vinyl ester over epoxy.

Allow the epoxy to cure to the point where sanding produces a fine powder. Using epoxy you can improve the laminate properties with a post cure almost always. Before applying gelcoat over epoxy. Epoxy adheres to wood much better than polyester does.

For vinylester resins and even less for polyesters. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. In the case where a part originally manufactured utilizing polyester or vinylester has yielded to strain and cracked a well reinforced epoxy repair will tenaciously hold to the substrate with 2000 psi strength vinylester. Vinyl esters also use peroxides e g.

The hardener catalyst for vinyl ester resin and polyester resins is mekp. Specifically proper cure of vinyl ester resins and a 15 year study of the effective use of permeation barriers in marine composites to prevent corrosion and blistering. They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins. It is water resistant.

Epoxy resin is an ideal resin for high performance and light weight parts. Has some great papers on this which i am quoting from. 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.

In areas that must be able to flex and strain with the fibers without micro fracturing epoxy resins offer much greater capability. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Cloth and polyester resin. 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. Quality epoxy resins stick to other materials with 2 000 p s i. Cured epoxy tends to be very resistant to moisture absorption. Many high strain repair areas and lightweight parts must flex and strain without micro fracturing.