Greater molecular excess weight diglycidyl ethers (n ≥ one) are fashioned via the reaction with the bisphenol A diglycidyl ether shaped with additional bisphenol A, this is known as prepolymerization: Hardeners which present only reduced or confined reactivity at ambient temperature, but which react with epoxy resins at elevated temperature https://www.propanraya.com/id/produk/epoxy-fast-dry