Vinyl Ester Over Polyester

It is important to note that of the three vinyl ester resin will provide the highest corrosion resistance temperature resistance and elongation toughness.

Vinyl ester over polyester.

Structural polyester resin with fiberglass layer 4. Vinyl ester can be used as the final coat after polyester resin to create a better water barrier. Epoxy can be applied over polyester and vinyl ester resin for repairs etc but not vice versa vinyl ester resin. It has a longer molecular chain than polyester.

Vinyl ester resin falls between the polyester and epoxy resin when it comes to different characteristics and cost. Iso polyester gelcoats 27 35 288 87. Especially when the kss panels are being bent around one way or the other. It is typically used in gas tanks boat hulls and other items that will be exposed to water or chemicals for extended periods of time.

It s great having someone so knowledgeable just one phone call email or. Vinyl ester resin is more resistant to solvents and water degradation. For this reason epoxy resins can be applied over polyester vinyl ester resins to achieve a chemical bond but polyester vinyl ester resins can not be applied over epoxy resin. I have always wondered why kelsall with his kss flat panel construction prefers polyester to epoxy in the face of all the evidence against polyester.

Polyester and vinyl ester are not compatible with epoxy resin. Vinyl esters are more tolerant of stretching than polyesters. Vinyl ester has fewer open sites in its molecular chain. Pigment paste concentrates 9 90 51 90.

This makes it much more resistant to water penetration hydrolysis which can cause osmotic blistering. Corrosive resistant vinyl ester resin with fiberglass layer 3. Both vinylester and polyester components have a shelf live of just months. 945 vinylester bonding compound 20 90 205 50.

Polyester resin finishing layer. Vinyl ester resins can be formulated to perform in a variety of applications requiring increased strength over polyester resins and in many. One of the key layers that has been introduced into fiberglass construction over the last 20 years has been the use of a corrosive resistant vinyl ester layer. 555 vinylester glass flake barrier coat 38 50 425 00.

For primary bonds the wet on wet bonding is strongest between chemically compatible resins so if you re finishing with gelcoat you have to use polyester resin or.