The Most popular epoxy resins are possibly diglycidyl ethers of bisphenol A, which happens to be created by reacting bisphenol A (BPA) with epichlorohydrin (ECH). the molecular excess weight is managed by changing the ratio of ECH to BPA; higher ratios produce lessen molecular weights. Epoxy is a flexible material https://www.propanraya.com/kategori/cat-lantai
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