24-06-05
Finally after more then 35 years there are some real new developments in the zirconium based crosslinker chemistry. Allinova is proud to be world wide the first company who introduces the new generation zirconium based crosslinkers.
Ammonium zirconium carbonate (AZC) and potassium zirconium carbonate (KZC) are complex structures, commonly available in water based solutions. AZC and KZC are widely used as insolubilizer in paper coatings, crosslinker for water based binders (acrylates, SBR latex, PVA, CMC...) and hydrophobing improvers of dispersions. The mode of crosslinking action is due to the reaction of zirconium with the free carboxylic and hydroxylic groups of the binder.
Zirconium in AZC and KZC solutions has a polymer structure. The big difference between the old and new generation zirconium based crosslinkers is the molecule length of these polymers. The smaller the molecule length, the more zirconium is free for the final crosslinking. Addition levels of 40-70% compared with the old generation crosslinkers are normally enough to give the same crosslinking power.