Acetic Anhydride → Sebacic Acid

The prepolymer of sebacic acid (SA) was prepared from the purified diacid monomer by refluxing in excess acetic anhydride for 30 minutes and evaporating the solvent to dryness. The hot clear viscous residue was dissolved in an equal volume of dichloromethane and precipitated in a mixture of ether/petroleum ether (1:1 v/v). The white precipitate was collected by filtration and dried by vacuum at room temperature. Acetyl terminated fatty acid anhydrides were prepared by dissolving the acids in acetic anhydride (120° C., 1:5 w/v) and refluxing for 20 min. Acetate anhydrides of oleic acid, linoleic acid and other cis-double bond containing fatty acid were prepared by refluxing the fatty acid in acetic anhydride for 20 min. and evaporating the solvent to dryness to obtain a liquid. Mixed prepolymers of diacids with the monoacid terminals were prepared similarly.

1. customevaporating the solvent to dryness
2. dissolutionThe hot clear viscous residue was dissolved in an equal volume of dichloromethane
3. customprecipitated in a mixture of ether/petroleum ether (1:1 v/v)
4. filtrationThe white precipitate was collected by filtration
5. customdried by vacuum at room temperature
6. customAcetyl terminated fatty acid anhydrides
7. customwere prepared
8. temperaturerefluxing for 20 min
9. customwere prepared
10. customevaporating the solvent to dryness
11. customto obtain a liquid

ORD record

ord-a0d41e915711416f8c03b6f1830fb910

Source dataset

uspto-grants-2010_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07749539B2