Amines and polymeric phenols and usage thereof as curing agents in one component epoxy resin compositions

摘要

The disclosure relates to solving problems associated with conventional latent epoxy curing agents by providing a new class of latent epoxy curing agents. In particular, the disclosure relates to epoxy curing agents with improved storage stability and low use level (e.g., less than about 10 wt % relative to the epoxy compound) by forming solid solutions of certain classes of amines in polyphenolic resins.

主权项

1. A composition comprising dicyandimide, and a solid solution of at least one polyphenolic resin and at least one imidazole or substituted imidazoles represented by the general structure shown below: wherein R1=amino alkyl substituted groups of 1-20 carbon atoms and R2, R3, and R4 may be alkyl or aryl groups of 1-20 carbon atoms; wherein the polyphenolic resin comprises at least one phenol formaldehyde resin and wherein the solid solution has a particle size of about 2 to about 50 um.