Biobased functional polyesters for coating applications: Synthesis, characterization and application

CELL 172

Bart A. J. Noordover, b.a.j.noordover@tue.nl1, Robbert Duchateau, r.duchateau@tue.nl1, Cor E. Koning, c.e.koning@tue.nl1, Rolf A. T. M. van Benthem, r.a.t.m.v.benthem@tue.nl2, W. Ming, W.Ming@tue.nl2, Jacco van Haveren, jacco.vanhaveren@wur.nl3, and Daan S. van Es, daan.vanes@wur.nl3. (1) Laboratory of Polymer Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, Netherlands, (2) Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, Netherlands, (3) Agrotechnology and Food Innovations, Wageningen University and Research Centre, P.O. Box 17, 6700AA Wageningen, Netherlands
Thermosetting coating systems contain polyesters as binders. A crucial property of these polymers is their functionality. During coating application, the polyesters are cross-linked in situ, which means that each polymer chain needs a sufficient number of reactive end-groups. Renewable monomers are attractive starting materials for polyester synthesis, since building blocks with great functional diversity are available from many resources. Aliphatic polyesters were synthesized through polycondensation of renewable monomers such as isosorbide, isoidide and 2,3-butanediol in combination with succinic or adipic acid. Glycerol was added to the polymerization mixture to enhance the polyester hydroxyl functionality. Reacting OH-functional resins with citric acid yielded polyesters with carboxylic acid end-groups and significantly increased functionality. Glassy polyesters with Mn > 2000 g/mol and Tg > 45 C were synthesized, having either hydroxyl or carboxylic acid end-groups. Chemistry, functionality and structure-property relations of these polyesters will be discussed, as well as their applicability in thermosetting coatings.

Functionalization of Renewable Materials
1:30 PM-5:00 PM, Wednesday, March 28, 2007 McCormick Place Lakeside -- Room E267, Level 2, Oral

Division of Cellulose & Renewable Materials

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007