bcati, abbreviation for 4-butoxy carbonyl amino toluene 2-tsocyanate, was reacted with the active hydrogen atom in hydroxy of epoxy resin e-20 and then the modified epoxy resin was obtained.
hydrogen donor can provide active hydrogen atom to postpone or control the forming of the second liquid phase and effectively restrain the coking when catalyst and hydrogen were absent.
供氢剂在无催化剂和氢气存在条件下 ,可提供活性氢原子推迟或阻止第二液相的形成 ,有效抑制生焦 ;
due to the absence of active hydrogen atom on soft segment, an covalent bond can be found between dye molecule and soft segment.