Increased molecular weight diglycidyl ethers (n ≥ 1) are formed from the reaction of the bisphenol A diglycidyl ether fashioned with additional bisphenol A, this is called prepolymerization: Epoxy resins are polymeric or semi-polymeric products or an oligomer, and as such seldom exist as pure substances, due to the fact https://www.propanraya.com/id/produk/epoxy-fast-dry