Ring Opening Of Epoxidized Fatty Acid Esters
This invention relates to a ring opening method. The method includes reacting an epoxidized fatty acid ester with an alcohol to open an epoxy ring of the ester. A salt of tetrafluoroboric acid is used as a catalyst in the reaction. In another embodiment, the invention relates to a method of producing a polyurethane. An epoxidized fatty acid ester is reacted with an alcohol to open an epoxy ring of the ester, thereby to produce a polyol. A salt of tetrafluoroboric acid is used as a catalyst in the reaction. The polyol is then reacted with an isocyanate to produce a polyurethane. In a further embodiment, the polyol is used to produce a product selected from polyurethanes, coatings, adhesives, sealants, elastomers and lubricants.
1 . A ring opening method comprising reacting an epoxidized fatty acid ester with an alcohol to open an epoxy ring of the ester, using a salt of tetrafluoroboric acid as a catalyst in the reaction.
2 . The method of claim 1 wherein the salt is a metal salt.
3 . The method of claim 2 wherein the metal is copper or iron.
4 . The method of claim 1 wherein the fatty acid ester is a triglyceride.
5 . The method of claim 4 wherein the triglyceride is selected from the group consisting of vegetable oils, algal oils, animal fats and combinations thereof.
6 . The method of claim 5 wherein the triglyceride is selected from the group consisting of vegetable oils, animal fats and combinations thereof.
7 . The method of claim 4 wherein the triglyceride excludes algal oils.
8 . The method of claim 4 wherein the triglyceride comprises soybean oil.
9 . The method of claim 1 wherein the alcohol is a monohydric alcohol having from one to six carbon atoms.
10 . The method of claim 1 wherein the alcohol is a polyol having two or less hydroxyl groups.
11 . The method of claim 1 wherein the product of the ring opening reaction is a polyol.
12 . The method of claim 10 wherein the polyol has a hydroxyl value within a range from about 75 to about 400.
13 . The method of claim 1 wherein the product of the ring opening reaction is subjected to a further reaction to produce a polyol.
14 . The method of claim 1 further comprising a step of water washing the product to remove catalyst without neutralization.
15 . A method of producing a polyurethane comprising:
reacting an epoxidized fatty acid ester with an alcohol to open an epoxy ring of the ester, using a salt of tetrafluoroboric acid as a catalyst in the reaction, to produce a polyol; and
reacting the polyol with an isocyanate to produce a polyurethane.
16 . The method of claim 15 wherein the salt is a metal salt.
17 . The method of claim 15 wherein the fatty acid ester is a triglyceride.
18 . The method of claim 17 wherein the triglyceride is selected from the group consisting of vegetable oils, animal fats and combinations thereof.
19 . The method of claim 15 comprising an additional step, before the ring opening reaction, of subjecting the fatty acid ester to an epoxidation reaction to produce the epoxidized fatty acid ester.
20 . A method of producing a product comprising:
reacting an epoxidized fatty acid ester with an alcohol to open an epoxy ring of the ester, using a salt of tetrafluoroboric acid as a catalyst in the reaction, to produce a polyol; and
using the polyol to produce a product selected from polyurethanes, coatings, adhesives, sealants, elastomers and lubricants.