Development of an ecological varnish from the resin of pine
| Autor: | J. Hernández-Torres, Lada G. Domratcheva-Lvova, Leandro García-González, S. R. Vásquez-García, Nelly Flores-Ramírez, Erandini Guzmán-Mejía |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Varnish Diol Rosin Diphenylmethane 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound medicine Organic chemistry General Materials Science Abietic acid Polyurethane Mechanical Engineering 021001 nanoscience & nanotechnology Condensed Matter Physics Isocyanate 0104 chemical sciences chemistry Mechanics of Materials visual_art visual_art.visual_art_medium Resin acid 0210 nano-technology medicine.drug |
| Zdroj: | MRS Advances. 3:3827-3832 |
| ISSN: | 2059-8521 |
| DOI: | 10.1557/adv.2018.599 |
| Popis: | Rosin resin is constituted by rosin acids, in particular, abietic acid, which is an 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 from 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. The varnish named as (PAR), 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 SEM showed a homogeneous phase on the PAR surface and FTIR between the diphenylmethane, 4-4, diisocyanate (MDI) and the varnish from hydroxylated rosin resin (HAA) showed that the reaction was carried out in its entirety, exhausting the limiting reagent (MDI). The obtained varnish which was labelled as PAR has very suitable characteristics for indoor use. It has a transparent and bright appearance, a solids percentage of 44–45%, a drying time for application between layers and layers of 15–20 minutes. |
| Databáze: | OpenAIRE |
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