Alkyl ketene dimer (AKD) was industrialized in 1956 and was only used in special papers requiring heavy sizing. In recent years, cultural paper has been basically changed to AKD neutral sizing, making it more widely used. Applications.
Alkyl ketene dimer is a white flake solid, which is soluble in organic solvents such as ethanol, benzene, chloroform, etc. It has the ability to resist weak acid, weak alkali or other penetrants.
Alkyl ketene dimer (AKD) is a white solid, which can be synthesized by acylation and dehydrochlorination of higher fatty acids (C≥12).
