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Vinyl Ester, or Vinylester, is a resin produced by the esterification of an epoxy
Epoxy

In chemistry, epoxy or polyepoxide is a thermosetting epoxide polymer that cures when mixed with a catalyst agent or hardener. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A....
 resin with an unsaturated monocarboxylic acid
Carboxylic acid

Carboxylic acids are organic acids characterized by the presence of a carboxyl group, which has the Chemical formula -COH, usually written -COOH or -CO2H....
. The reaction product is then dissolved in a reactive solvent, such as styrene, to a 35 - 45 percent content by weight.

It can be used as an alternative to polyester
Polyester

Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate ....
 and epoxy
Epoxy

In chemistry, epoxy or polyepoxide is a thermosetting epoxide polymer that cures when mixed with a catalyst agent or hardener. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A....
 materials in matrix or composite materials
Composite material

Composite materials are engineered materials made from two or more constituent materials with significantly different physical or chemical properties which remain separate and distinct on a macroscopic level within the finished structure....
, where its characteristics, strengths, and bulk cost intermediate between polyester and epoxy.






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Vinyl Ester, or Vinylester, is a resin produced by the esterification of an epoxy
Epoxy

In chemistry, epoxy or polyepoxide is a thermosetting epoxide polymer that cures when mixed with a catalyst agent or hardener. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A....
 resin with an unsaturated monocarboxylic acid
Carboxylic acid

Carboxylic acids are organic acids characterized by the presence of a carboxyl group, which has the Chemical formula -COH, usually written -COOH or -CO2H....
. The reaction product is then dissolved in a reactive solvent, such as styrene, to a 35 - 45 percent content by weight.

It can be used as an alternative to polyester
Polyester

Polyester is a category of polymers which contain the ester functional group in their main chain. Although there are many polyesters, the term "polyester" as a specific material most commonly refers to polyethylene terephthalate ....
 and epoxy
Epoxy

In chemistry, epoxy or polyepoxide is a thermosetting epoxide polymer that cures when mixed with a catalyst agent or hardener. Most common epoxy resins are produced from a reaction between epichlorohydrin and bisphenol-A....
 materials in matrix or composite materials
Composite material

Composite materials are engineered materials made from two or more constituent materials with significantly different physical or chemical properties which remain separate and distinct on a macroscopic level within the finished structure....
, where its characteristics, strengths, and bulk cost intermediate between polyester and epoxy. Vinyl ester has low resin viscosity(approx 200 cps), than polyester(approx 500cps) and epoxy(approx 900cps)

In homebuilt airplanes, the Glasair and Glastar kit planes made extensive use of vinylester-reinforced fiberglass
Fiberglass

Fiberglass, , is material made from extremely fine fibers of glass. It is used as a reinforcing agent for many polymer products; the resulting composite material, properly known as fiber-reinforced polymer or glass-reinforced plastic , is called "fiberglass" in popular usage....
 structures. It is a common resin in the marine industry due to its increased corrosion resistance and ability to withstand water absorption.

Sources

  • ResinNavigator.org's