Process for the production of reaction mixtures containing ester polyols
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsGerhard Stoll, Peter Daute, Rainer Hoefer, Roland Gruetzmacher, Hermann Kluth
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Abstract
Process for the preparation of ester polyols by conducting the ring opening of epoxidized esters and/or alcohols with carboxylic acids by the controlled addition of the epoxidized compounds to the carboxylic acids wherein the carboxylic acids are present in at least stoichiometric quantities based on epoxide groups, to minimize unreacted epoxide groups and produce ester polyols having relatively low viscosities compared to those produced by the one-pot prior art process.
Claims20
A process for the preparation of an ester polyol or a mixture of ester polyols comprising the steps of
- (A) adding to at least one carboxylic acid maintained at a temperature above 80.degree. C. but below 300.degree. C. at least one epoxidized compound selected from the group consisting of epoxidized esters and epoxidized alcohols wherein the carboxylic acid is present in at least about stoichiometric quantity based on the epoxide content of the epoxidized compound, and the epoxidized compound is added to the carboxylic acid, to ring open the epoxide groups, at a controlled rate of addition such that less than 50% by weight of the theoretically possible quantity of epoxide oxygen is present in the reaction mixture after complete addition of the at least one epoxidized compound;
- and
- (B) isolating an ester polyol or mixture of ester polyols from said reaction mixture.
Dependencies are inferred from the claim text.