Abstracts Book - IMRC 2018

• SB1-P003
ECOLOGICAL VARNISH OBTAINED BY FUNCTIONALISATION AND
POST-SYNTHETIC MODIFICATION OF ABIETIC ACID
Nelly Flores Ramirez 1 , Erandini Guzmán Mejía 1 , Salomon Ramiro Vasquez Garcia 2 , Leandro
Garcia Gonzalez 3 , Gerardo Gallegos Leon 1
1
Universidad Michoacana de San Nicolás de Hidalgo, Department of Wood Engineering and
Technology, Mexico. 2 Universidad Michoacana de San Nicolás de Hidalgo, Department of
Chemical Engineering, Mexico. 3 Universidad Veracruzana, Research Center for Micro and
Nanotechnology, Mexico.
Rosin pitch is constituted by rosin acids, in particular, abietic acid, which is
inexpensive substance. This paper concerns the study of the molecular
interactions between a bifunctional monomer of abietic acid with isocyanate to
form polyurethane. Polyurethane is a varnish that can be applied to any timber
surface protecting it chemical and environmental factors. Furthermore, the
polar groups (OH´s) of the diol have a direction along the molecular axis thus,
increasing their intermolecular interactions with the isocyanate groups. Varnish
was synthesized in the laboratory and applied to a timber surface whereby its
functionality was evaluated. Morphological and spectroscopic studies were
carried out on the diol obtained and the polyurethane. Likewise, we behaved
several of physical and chemical analyses of vanish The comparative FTIR study,
between the methylene diphenyl diisocyanate (MDI) and the varnish abietic acid
hydroxylated (AAH), showed that the reaction was carried out in its entirety,
exhausting the limiting reagent (MDI), which was reflected with the
disappearance of the characteristic group to isocyanates obtained. The obtained
varnish has very suitable characteristics for indoor use. It has a transparent and
bright appearance, a solids percentage of 44-45 wt%, a drying time for
application between layers and layers of 15-20 min, resistance to different
substances such as alkalis, acids, solvents, a drying time of 24-hour stowage.
Keywords: abietic acid, polyurethane, varnish
Presenting authors email: salomon_vg@yahoo.com