These days, recycling of resources is being encouraged and supported as a main industry policy. The recycling through the pyrolysis of waste-plastic, the collection of copper oxide by the utilization of waste-copper, the recycling of waste-lubricating oil and waste-tires and so on, are being studied...
These days, recycling of resources is being encouraged and supported as a main industry policy. The recycling through the pyrolysis of waste-plastic, the collection of copper oxide by the utilization of waste-copper, the recycling of waste-lubricating oil and waste-tires and so on, are being studied and developed in various fields of industry. In this paper, our object is also recycling of waste-paint. Here, the most important thing is removing moisture contained in the waste-paint, but we could easily remove moisture by using microwave as energy source and also remove remained vapor and solvent by using defoamer. The waste-paint could be recycled as liquid-phase resin after passing through the dispersion process of the last step. The recycled waste-paint could be surely used as low-grade primer paint, thermosetting anticorrosion paint or substitutive resin of sound proof plate. We got the following results from the study. 1) Hot air, infrared rays and far infrared rays dryer took long time to dry and the surface of waste-paint was apt to ignite as drying time was prolonged in order to remove the moisture which combined with the molecule of resin. They show many problems in production and operation efficiency as well. But we could solve the problems by using the microwave dryer. 2) The results showed that dry efficiency was higher and dry time was shortened by adding hot air as an assistant energy source with main energy source. 3) The liquid-phase resin which passed through the dryer should go through the defoamer and the dispersion process in order to remove vapor and solvent. 4) After adding 10% tolune, stabilizer and additive to recycled paste-phase resin controlling the viscosity, we could make low-grade primer paint. 5) Adding 10~30% plasticizer to recycled paste-phase resin, the liquid-phase resinification take place by addition reaction. We could manufacture thermosetting anticorrosion paint by reacting 8~20% liquid-phase resin, 10~20% polyvinyl chloride, 2~8% stabilizer, 25~45% filler, 2~8% viscous additive and 15~25% plasticizer. 6) Adding 5~10% plasticizer to recycled paste-phase resin, the liquid-phase resinification take place by addition reaction. We could manufacture sound proof plate by reacting and pressing 12~30% liquid-phase resin, 20~40% asphalt resin, 1~5% phenolic resin, 1~5% plasticizer, 1~5% liquid-phase rubber, 30~40% filler, 1~5% additive. As the results, we need to study out various purposes of waste-paint and make every effort to develope high value added recycling method rather than just collect and bum it up.
These days, recycling of resources is being encouraged and supported as a main industry policy. The recycling through the pyrolysis of waste-plastic, the collection of copper oxide by the utilization of waste-copper, the recycling of waste-lubricating oil and waste-tires and so on, are being studied and developed in various fields of industry. In this paper, our object is also recycling of waste-paint. Here, the most important thing is removing moisture contained in the waste-paint, but we could easily remove moisture by using microwave as energy source and also remove remained vapor and solvent by using defoamer. The waste-paint could be recycled as liquid-phase resin after passing through the dispersion process of the last step. The recycled waste-paint could be surely used as low-grade primer paint, thermosetting anticorrosion paint or substitutive resin of sound proof plate. We got the following results from the study. 1) Hot air, infrared rays and far infrared rays dryer took long time to dry and the surface of waste-paint was apt to ignite as drying time was prolonged in order to remove the moisture which combined with the molecule of resin. They show many problems in production and operation efficiency as well. But we could solve the problems by using the microwave dryer. 2) The results showed that dry efficiency was higher and dry time was shortened by adding hot air as an assistant energy source with main energy source. 3) The liquid-phase resin which passed through the dryer should go through the defoamer and the dispersion process in order to remove vapor and solvent. 4) After adding 10% tolune, stabilizer and additive to recycled paste-phase resin controlling the viscosity, we could make low-grade primer paint. 5) Adding 10~30% plasticizer to recycled paste-phase resin, the liquid-phase resinification take place by addition reaction. We could manufacture thermosetting anticorrosion paint by reacting 8~20% liquid-phase resin, 10~20% polyvinyl chloride, 2~8% stabilizer, 25~45% filler, 2~8% viscous additive and 15~25% plasticizer. 6) Adding 5~10% plasticizer to recycled paste-phase resin, the liquid-phase resinification take place by addition reaction. We could manufacture sound proof plate by reacting and pressing 12~30% liquid-phase resin, 20~40% asphalt resin, 1~5% phenolic resin, 1~5% plasticizer, 1~5% liquid-phase rubber, 30~40% filler, 1~5% additive. As the results, we need to study out various purposes of waste-paint and make every effort to develope high value added recycling method rather than just collect and bum it up.
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