New insights into the AKD sizing mechanism
Kyle J. Bottorff and Mark J. Sullivan, Hercules Incorporated, Wilmington, Delaware, USA
Keywords: Alkylketene dimers, AKD, Reaction mechanisms,
Solid State "C NMR, Sizing, P-Keto acid, P-Ketocalciumsalt,
P-Keto ester, AKD oligomers.
SUMMARY: Paper samples sized with 13C labeled alkylketene
dimer (AKD) dispersions were characterized by solid state
carbon NMR resulting in direct evidence supporting the forma-
tion of AKD-cellulose P-keto esters on AKD sized paper.
A series of AKD reaction products that may