The preferred epoxy resins are either diglycidyl ethers of bisphenol A, and that is created by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular pounds is controlled by changing the ratio of ECH to BPA; high ratios crank out decrease molecular weights. In such a case, so-called ‘reactive diluents’ https://www.propanraya.com/kategori/cat-lantai