Comportamiento del secado de la resina (pav-50) variando las concentraciones del sistema de secantes
Fecha
2005
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Universidad de Guayaquil. Facultad de Ciencias Químicas
Resumen
La presente investigación que he realizado, consta de dos partes, las que se detallarán a continuación:
En su primera parte; con la finalidad de aclarar mejor el tema de investigación busqué conceptos sobre las resinas alquídicas, sus clasificaciones, las materias primas utilizadas para su elaboración, elaboración de resinas, usos y precauciones en su manejo.
Además respecto a los secantes, aclaré definiciones sobre ellos, tipos de secantes, características de un buen secante, acción de los secantes más importantes utilizados industrialmente, factores que afectan sus características y recomendaciones sobre su uso.
El mecanismo de polimerización de las resinas promovido por los secantes, reacciones producidas en un proceso de curado y métodos de secado de las resinas, sirvieron para destacar el proceso de reacción o unión entre las resinas alquídicas y un sistema de secantes.
En la segunda parte me dediqué a la investigación propiamente dicha, basada en el comportamiento de la resina PAV - 50 variando las concentraciones del sistema de secantes, la misma que para su elaboración se basó en la toma de muestras de lotes de resina alquídica de la fábrica Polychemical S.A.; y realicé pruebas de secado , con un sistema de secantes utilizado en la empresa, tratando de mantener un ambiente adecuado de temperatura y humedad, variando sus concentraciones de secantes metálicos para así comprobar que sistema de secantes es el más óptimo.
Por los resultados obtenidos pude observar e interpretar que el mejor sistema de secantes es el conformado por 1,0 g. de zirconio, 1,0 g. de cobalto y 1,0 g. de calcio, aunque las desventajas son su costo y los efectos que pueden provocar estos secantes en altas concentraciones. Por lo tanto realicé un análisis de costo, pudiendo encontrar alternativas de sistemas de secantes para la resina PAV – 50, que pueden ser elegidos por el proveedor o cliente según sus necesidades.
Además comprobé conceptos como por ejemplo la curva de secado al aumentar o disminuir el zirconio, cobalto y calcio en el sistema; para lo cual utilicé la resina P – 5050, debido a su facilidad de manejo. Realicé líneas de tendencia según las variaciones de secantes realizadas.
Probé con concentraciones excesivas de secantes para obtener el punto óptimo de secado de la resina P – 5050. Dando como resultado que el aumento de secante provoca una disminución en su secado hasta su punto óptimo y luego comienza a elevarse los tiempos de secado con el progresivo aumento de secante.
The present research I have done has two parts which will be detailed forward. At the beginning with the goal of clear the theme as much as possible the research, I found up the basis concepts of alkyd resins, its classification, the elaboration’s raw materials, resins process, uses and manage precautions. About driers, I clear up its definitions, types of driers, characteristics and actions of most industrially used, factors that affect his properties and use recommendations. The resins polymerization mechanism promote by driers, reactions produced by curing process and resins dry method served to enhance the union or reaction of process between alkyd resin and driers systems. In the second part I dedicated the research itself on the resins PAV – 50 behaviour vary its dry system concentrations. This one was taken from shares of alkyd resins produced by Polychemical S.A. factory, and I did the dry tests using the factory dry system standard, also varying the metallic driers concentrations to prove which of them was the optimal one, trying to keep the adequate temperature and moisture environment. Thanks to the results obtained I could watch and interpret that the best dry system is conformed by 1,0 g. of zircon, 1,0 g. of cobalt, and 1,0 g. of calcium, but the disadvantages of it is its costs and the effects that may provoke under high concentrations. That is why I did a cost analysis founding dry systems alternatives for the PAV – 50 resin, that can be choice by the suppliers or clients according to their needs. Beside I proved concepts like the dry curved increasing or decreasing the zircon, cobalt and calcium from system, for what I test with P – 5050 resin thanks to handle facilities. I did the tendency lines according to the dry variations done. I tried with the excessive dry concentrations to obtain the dry optimal point of the P – 5050 resin, giving me as results that the dry increasing provokes diminution in its dried time to the optimal point and then it start increasing as long as the progressive driers rising up.
The present research I have done has two parts which will be detailed forward. At the beginning with the goal of clear the theme as much as possible the research, I found up the basis concepts of alkyd resins, its classification, the elaboration’s raw materials, resins process, uses and manage precautions. About driers, I clear up its definitions, types of driers, characteristics and actions of most industrially used, factors that affect his properties and use recommendations. The resins polymerization mechanism promote by driers, reactions produced by curing process and resins dry method served to enhance the union or reaction of process between alkyd resin and driers systems. In the second part I dedicated the research itself on the resins PAV – 50 behaviour vary its dry system concentrations. This one was taken from shares of alkyd resins produced by Polychemical S.A. factory, and I did the dry tests using the factory dry system standard, also varying the metallic driers concentrations to prove which of them was the optimal one, trying to keep the adequate temperature and moisture environment. Thanks to the results obtained I could watch and interpret that the best dry system is conformed by 1,0 g. of zircon, 1,0 g. of cobalt, and 1,0 g. of calcium, but the disadvantages of it is its costs and the effects that may provoke under high concentrations. That is why I did a cost analysis founding dry systems alternatives for the PAV – 50 resin, that can be choice by the suppliers or clients according to their needs. Beside I proved concepts like the dry curved increasing or decreasing the zircon, cobalt and calcium from system, for what I test with P – 5050 resin thanks to handle facilities. I did the tendency lines according to the dry variations done. I tried with the excessive dry concentrations to obtain the dry optimal point of the P – 5050 resin, giving me as results that the dry increasing provokes diminution in its dried time to the optimal point and then it start increasing as long as the progressive driers rising up.
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RESINAS ALQUIDICAS- SECANTES