Patent ID: 8664352
Filing Date: 2014-03-04
Classification: C07C,C08G

Abstract:
1. A method of making a polyester polyol from a natural oil-based starting composition, the method comprising the steps of: (a) providing a starting composition comprising up to about 95% weight monounsaturated fatty acids/alkyl esters derived from natural oils; (b) epoxidizing at least a portion of carbon-carbon double bonds in the starting composition to form an epoxidized fatty acid/alkyl ester composition; (c) drying the epoxidized fatty acid/alkyl ester composition to provide a dried epoxidized fatty acid/alkyl ester composition; (d) reacting the dried epoxidized fatty acid/alkyl ester composition with an alcohol or hydrogen to ring-open at least a portion of the epoxide groups to form a composition comprising hydroxylated fatty acids/alkyl esters, wherein the hydroxylated fatty acids/alkyl esters comprise a secondary alcohol; and (e) reacting the hydroxylated fatty acid/alkyl ester composition with a multifunctional ester-reactive initiator compound according to the formula where: A is an organic group; with the proviso that A does not contain an ester of a monofunctional alcohol;