Name | ALKYL KETENE DIMER |
Synonyms | AKD AKD WAX AKD WAX 1865 AKD WAX 1840 Alkylketene dimer ALKYL KETENE DIMER |
CAS | 144245-85-2 |
EINECS | 200-001-8 |
Melting Point | 48.5℃ |
Storage Condition | 2-8℃ |
Physical and Chemical Properties | Melting Point: 48.5 ℃ iodine value: giz/100g 44-47.5 acid value: mgkoh/g 2-3 free fatty acid: ≤ 2.0% loss on drying: ≤ 1.5 Appearance: light yellow solid (block or flake) |
Use | This product is made of higher fatty acid (c≥ 12) by acylation, dehydrochlorination and made of alkyl ketene dimer, this product is used as AKD, neutral sizing agent of the original powder for the manufacture of pulp neutral sizing agent emulsion. |
overview
AKD's Chinese name is Alkyl Ketene Dimer. AKD began to industrialize in 1956 and was only used in special paper that requires heavy sizing. In recent years, cultural paper has basically been changed to AKD neutral sizing, which has more application fields. This note introduces the main information of AKD, including basic properties, preparation methods and processes, AKD wax, AKD emulsion and the progress of surface sizing AKD.
use
this product is an alkyl ketene dimer made of higher fatty acid (C≥ 12) by acylation and dehydrochlorination. this product is used as the raw powder of AKD and neutral sizing agent to make emulsion of pulp neutral sizing agent.
properties
Appearance: white flake solid melting point 43.3 ℃
solubility:
Soluble in ethanol, benzene, chloroform and other organic solvents
acid-base resistance:
Ability to resist weak acids, weak bases or other penetrants.
AKD preparation method
after the solid AKD is melted, emulsifier and emulsion protective agent are added, and warm water is vigorously stirred and emulsified to form an emulsion, which is AKD neutral sizing agent.
progress
AKD wax: at present, AKD wax can be non-toxic, waste water-free, odor-free and pollution-free. The use of solvent-free production to obtain national patents. Liquid AKD wax can solve the problem of paper slippage. Continuous production of AKD wax, this method has improved the degree of automation and production efficiency.
AKD emulsion:
in recent years, the rapid curing AKD emulsion used for in-machine coating of light coated paper, the production of AKD emulsion with strong anti-interference performance of box board paper, and the production of surface sizing AKD with good emulsion stability have been greatly improved.