Curing agents for epoxy resins - produced by condensation of polyamines with aldehydes or ketones,and sec phosphites

摘要

Title cpds. are of formula: (in which R1 and R2 are each alkyl, aryl, alkaryl, alkoxyalkyl, hydroxyalkoxyalkyl, alicyclic gp. alian alkylene - or alkylenoxy alkylene ring; R3 is H or alkyl; R4 is an alicycclene-, arylene-, alkarylene- or aralkylene gp., or -CH2CH2-(NH-CH2CH2)x - NH2 gp.) or Advantages include reduced inflammability, improved light stability and increased metal-resin adhesion.