The Preferred epoxy resins are either diglycidyl ethers of bisphenol A, that is created by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is controlled by adjusting the ratio of ECH to BPA; substantial ratios deliver decreased molecular weights. In such cases, so-called ‘reactive diluents’ are additional – https://www.propanraya.com/kategori/cat-lantai