Epoxy Vinyl Ester Polyester

Cloth and polyester resin.

Epoxy vinyl ester polyester.

Vinyl ester has lower resin viscosity approx 200 cps than polyester approx 500cps and epoxy approx 900cps. Vinyl ester resins actually exceed both polyester and epoxy in corrosion resistance temperature resistance and elongation toughness. Because of this they are typically used when high durability thermal stability and extremely high corrosion resistance are needed. Over the past decade carbon fiber technology has greatly expanded thanks to new more streamlined manufacturing processes.

They are produced by the addition of α β unsaturated carboxylic acids to epoxy resins. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Vinylester is essentially a styrene modified epoxy resin. It has a longer molecular chain than polyester resin which helps it absorb impact better than polyester and it shrinks less.

Resins are bisphenol a diglycidyl ether dgeba and epoxy phenol novolac epn. Vinyl ester resin falls between the polyester and epoxy resin when it comes to different characteristics and cost. There is also less chance of de lamination when using ve resin. These new methods create automotive and motorcycle parts which are stronger and more impact resistant than steel and weigh 1 4th less.

Vinyl esters also use peroxides e g. Epoxy vinyl ester resins ver are an important class of high performance thermoset molding resins. Epoxy adheres to wood much better than polyester does. This thermoset material can be used as an alternative to polyester and epoxy materials as the thermoset polymer matrix in composite materials where its characteristics strengths and bulk cost are intermediate between polyester and 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. To cover wood a laminate using epoxy resin and 10 oz cloth will yield a much better job than 10 oz. Vinyl ester resins are produced by the reaction esterification between an epoxy resin and an unsaturated monocarboxylic acid. Vinylester is a hybrid form of polyester resin which has been toughened with epoxy molecules within the main moleculer structure.

These resins form durable laminates and coatings. It adds excellent strength rigidity adhesion water and chemical resistance. Epoxies polyesters and vinylesters represent two resin families.