The Preferred epoxy resins are both diglycidyl ethers of bisphenol A, which happens to be designed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is managed by altering the ratio of ECH to BPA; higher ratios make lessen molecular weights. Through the epoxy resin and amine response, https://www.propanraya.com/kategori/cat-lantai