Co- and terpolyesters based on isosorbide and succinic acid for coating applications: synthesis and characterization.
Co- and terpolyesters based on succinic acid and isosorbide in combination with other renewable monomers such as 2,3-butanediol, 1,3-propanediol, and citric acid were synthesized and characterized. Linear polyesters were obtained via melt polycondensation of nonactivated dicarboxylic acids with OH functional monomers. Polymer end functionality (i.e., hydroxyl or carboxylic acid) was controlled by adjusting the monomer stoichiometry. The glass transition temperatures of the resulting polyesters could be effectively adjusted by varying the polymer composition and molar mass. By adding polyfunctional monomers such as trimethylolpropane or citric acid, polyesters with enhanced functionality were obtained. These biobased polyesters displayed functionalities and Tg values in the appropriate range for (powder) coating applications. The polyesters were cross-linked using conventional curing agents. Coatings from branched polyesters--hydroxyl as well as acid functional--showed significantly improved mechanical and chemical resistance compared to those formulated from linear polymers. These renewable polyesters proved to be suitable materials for coating applications with respect to solvent resistance, impact resistance, and hardness.
Noordover
Bart A J
BA
Laboratories of Polymer Chemistry and of Materials and Interface Chemistry, Eindhoven University of Technology, Den Dolech 2, 5600 MB Eindhoven, DSM Research, P.O. Box 18, 6160 MD Geleen, The Netherlands.
van Staalduinen
Viola G
VG
Duchateau
Robbert
R
Koning
Cor E
CE
van Benthem
Rolf A T M
RA
Mak
Manon
M
Heise
Andreas
A
Frissen
August E
AE
van Haveren
Jacco
J
D002072:Butylene Glycols; D002264:Carboxylic Acids; D020099:Coated Materials, Biocompatible; D007547:Isosorbide; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D011091:Polyesters; D011108:Polymers; D019802:Succinic Acid
D002072:Butylene Glycols; D002264:Carboxylic Acids; D020099:Coated Materials, Biocompatible; D011091:Polyesters; D011108:Polymers; C026978:2,3-butylene glycol; D019802:Succinic Acid; D007547:Isosorbide