Vinyl Ester Or Epoxy
Epoxies belong to a family of resins which are epoxy functional which means they can be cured with amine curing agents at room temperatures to form excellent adhesives and composite resins.
Vinyl ester or epoxy. Vinylester is essentially a styrene modified epoxy resin. Jimslade sep 7 2005 3 joined. Epoxies polyesters and vinylesters represent two resin families. These coatings typically exceed both polyester and epoxy in corrosion resistance temperature resistance and elongation toughness.
Epoxy s base is amine which is a different family altogether. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. The hardener catalyst for vinyl ester resin and polyester resins is mekp. Epoxy vinyl ester resins ver are an important class of high performance thermoset molding resins.
This condensation product acts as a crosslinking agent and to improve adhesion to glass fibers. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Vinyl ester resins are typically formulated from styrene and a condensation product of methacrylic acid with an epoxy. These resins form durable laminates and coatings.
Polyester is small chain carbon whereas vinylester is long chain carbon which makes it more flexible. Vinyl esters also use peroxides e g. Vinyl is similar to polyester. The vinyl groups refer to these ester substituents which are prone to polymerize.
Epoxy adheres to wood much better than polyester does. Vinyl ester resin or often just vinyl ester is a resin produced by the esterification of an epoxy resin with acrylic or methacrylic acids. Resins are bisphenol a diglycidyl ether dgeba and epoxy phenol novolac epn. Polyester will not stick to epoxy but vinylester will.
The curing process is radical initiated. You can put epoxy over polyester but not the other way. Cloth and polyester resin. They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins.
Vinyl ester resins are a cross between polyester resins and epoxy resins. To cover wood a laminate using epoxy resin and 10 oz cloth will yield a much better job than 10 oz.