The synthesis of 2-hydroxyethyl methacrylate HEMA and its polymerization process was represented atomic number 49 US Patent 2028012 1936 and applications as hydrogels was rumored atomic number 49 1960 while IT designed essentially atomic number 49 1965 It tin live synthesized from methacrylic acid through and through transesterification response of ethylene ethanediol Scheme 1 or through and through response of ethene oxide and methacrylic acid Scheme 2 atomic number 3 shown In Fig 3 Products equipt past these 2 methods contains impurities atomic number 49 pain free dentist team valley various percentages eM methacrylic acid shaping due to hydrolysis reaction of HEMA and EGDMA resulting from esterification response tween methacrylic acid OR HEMA and ethylene glycol It is antiophthalmic factor low building block slant monomer which is characterized past its hydrophilic properties and is an important constituent of to the highest degree adhesive agent systems
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