The preferred epoxy resins are either diglycidyl ethers of bisphenol A, which is established by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular excess weight is controlled by altering the ratio of ECH to BPA; high ratios produce reduce molecular weights. In this instance, so-known as ‘reactive diluents’ are https://www.propanraya.com/kategori/cat-lantai