Neopentyl Glycol Diglycidyl Ether
Neopentyl glycol diglycidyl ether (NPGDGE) is an organic chemical in the glycidyl ether family. It is aliphatic and a colorless liquid. It has the formula C11H20O4 and the CAS registry number of 17557-23-2. It has two oxirane groups per molecule. Its principle use is in modifying epoxy resins. It is REACH registered. The IUPAC name is 2- 2,2-dimethyl-3-(oxiran-2-ylmethoxy)propoxyethyl]oxirane. Synthesis Neopentyl glycol and epichlorohydrin are reacted in the presence of a Lewis acid catalyst to form a halohydrin. This is followed by washing with sodium hydroxide in dehydrochlorination step. This forms Neopentyl glycol diglycidyl ether. The waste products are water and sodium chloride and excess caustic soda. One of the quality control tests would involve measuring the Epoxy value by determination of the epoxy equivalent weight. Uses A key use is modifying the viscosity and properties of epoxy resins. As an Epoxy modifier it is classed as an epoxy reactive diluent. which may then ...
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