Plasticiser esters

Details Plasticiser esters Plasticiser esters

2011-04-05

2011-04-05

Young, Shawquia (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

07919649

ABSTRACT:
Esters produced by the catalyzed reaction of alcohols and acids or anhydrides are neutralized by treatment with an aqueous alkaline alkali metal salt solution in an amount that provides less than a stoichiometric amount of alkali metal salt in relation to the acidity of the crude ester and the amount of water present during the treatment is from 0.7 to 1.4 wt % of water based on the weight of crude ester. When using titanium as the esterification catalyst, the ester resulting from this process contains less than 0.01 ppm by weight of titanium residue, so that it is storage stable when stored in the presence of an antioxidant.

REFERENCES:
patent: 5324853 (1994-06-01), Jones et al.
patent: 5460885 (1995-10-01), Chu-Ba
patent: 5880310 (1999-03-01), Ageishi et al.
patent: 6150552 (2000-11-01), Schreier et al.
patent: 2004/0254393 (2004-12-01), Godwin et al.
patent: WO 2005/021482 (2005-10-01), None

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