Preparation of alkyl ketene dimers

Details Preparation of alkyl ketene dimers Preparation of alkyl ketene dimers

2011-06-14

2011-06-14

Woodward, Ana L (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S271000, C528S363000, C549S329000, C568S301000, C568S302000

Reexamination Certificate

active

07960497

ABSTRACT:
The embodiments of the process of the present invention relate to the preparation of alkyl ketene dimers (AKD), where the process combines at least one polyamine with a fatty acid chloride in a molar ratio of less than one mole of polyamine to one mole of fatty acid chloride thereby forming an alkyl ketene dimer/amine salt that is subsequently separated into an organic dimer layer and an aqueous salt layer.

REFERENCES:
patent: 5344943 (1994-09-01), Brolund
patent: 5399774 (1995-03-01), McIntosh
patent: 5502218 (1996-03-01), Nicholass et al.
patent: 5672721 (1997-09-01), Ettl
patent: 0 550 107 (1992-12-01), None
patent: 0 612 739 (1994-02-01), None

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