The most popular epoxy resins are both diglycidyl ethers of bisphenol A, that's developed by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular weight is managed by modifying the ratio of ECH to BPA; large ratios produce lower molecular weights. Phenols also present superior warmth resistance and electrical insulation https://www.propanraya.com/kategori/cat-lantai