Vinyl Ester Vs Polyester Strength

Many high strain repair areas and lightweight parts must flex and strain without micro fracturing.

Vinyl ester vs polyester strength.

When higher strength bond and water resistance is required such as keel rudder repair or out board transom replacement use lbi s 302 isothalic polyester resin. Vinyl esters also use peroxides e g. Essentially they comprise a base of polyester resin strengthened with epoxy molecules in the backbone of the molecular chain. Vinylester the vinylester resins are only about 1 3rd as strong as the epoxy.

First stretch to failure. 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. Ortho polyester isothalic polyester and vinylester resins are compatible they all have styrene commonly known as the fiberglass smell and chemically bond to one another. There are many good reasons to use epoxy instead of polyester.

Glass fabric has about 6 stretch to failure. Standard pool failures with polyester resin standard fiberglass pool manufacturers only use vinyl ester resin in one layer of the swimming pool as vinyl ester resin. Vinyl ester resins offer increased strength corrosion resistance and durability and are used in a wide variety of applications. So in tension the glass is only loaded to about 17 of its strength.

Epoxy resin should be used. Vinyl ester has a shelf life of 3 months. If strength is part of the reason why you are purchasing this product avoid polyester resins for carbon fiber and kevlar bonding. Why epoxy is preferable to vinylester and both are preferable to polyester.

Resin has a short shelf life. So does most room temperature epoxy and many vinylesters. Polyester stretch to failure is everyone. Polyester resins published on june 5 2018 june 5 2018 13 likes 0 comments.

Try to store the resin in a cool dry place or refrigerate do not freeze it to extend the life of the resin. When using vinyl ester resin be sure to use it quickly after purchasing. Choosing the appropriate resin epoxy vs. The styrene in the polyester or vinyl ester resin will melt it.