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phenolic epoxy paint, sometimes called epoxy phenolic paint, Novolek epoxy paint, because often irreplaceable for chemical storage tanks, so phenolic epoxy tank paint, epoxy phenolic liquid tank paint. No standards have been seen to regulate such products.
epoxy resin is an organic compound in a general molecule that contains two or more epoxy groups. The molecular structure of epoxy resin is characterized by a lively epoxy group in the molecular chain, which can be located at the end, middle or ring structure of the molecular chain. Because molecular structures contain lively epoxy groups, they can cross-link with multiple types of curing agents to form insoluble polymers with three-way mesh structures.
epoxy resin according to its structure, divided into many kinds, often used in coatings include:
BPA epoxy resin:
this is the most commonly used general-purpose epoxy resin, accounting for 80-90% of epoxy resin production, paint should be more familiar with it and understand.
BPA F epoxy resin:
, also known as BPA F dissored glycelin ether, or BPF, is produced by the acidic catalysis of phenol and formaldehyde to produce BPAF, and then with epoxy propane in the presence of sodium hydroxide polymerization. It is characterized by a small viscosity, less than 1/3 of the viscosity of BPA epoxy resin, its curing material performance and BPA epoxy resin is almost the same, but slightly lower heat resistance and slightly better corrosion resistance. Liquid BPA F epoxy resins can be used in solvent-free coatings, etc. Solid BPA F epoxy resins can be used as anti-corrosion coatings and powder coatings.
phenolic epoxy resin:
, also known as Novolac epoxy resin, is based on the line phenolic resin (Novolac) and epoxy chloropropane as raw materials in the presence of sodium hydroxide polymerizing reaction. Its outstanding features are high epoxy content (greater than 2, while bisphenol A epoxy base is only 2), larger viscosity, curing products cross-link density is high, heat resistance is higher than other types of epoxy resin.
market commercialized phenolic epoxy resins have the following:
common phenolic epoxy resin technical indicators:
DOW products:
original Wuxi resin factory products:
based on these characteristics of phenolic epoxy resins, when combined with appropriate amine curing agents to make coatings, the coating will be different from the ordinary BPA type A epoxy coating special properties and uses. This type of coating is called phenolic epoxy coating.