The Preferred epoxy resins are both diglycidyl ethers of bisphenol A, which is designed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is controlled by changing the ratio of ECH to BPA; superior ratios crank out reduced molecular weights. During the epoxy resin and amine response, the https://www.propanraya.com/kategori/cat-lantai