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Shandong Runfa Precision Sheet Co., Ltd.
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| China color coated with epoxy primer bottlenecks exist |
| Admin：山东润发精密薄板有限公司 Time：2010/11/13 Read：7545次 |
With the rapid development of color coating steel industry, the development performance of the color plate coating products to meet the diverse needs of high-class and has become a hot research at home and abroad. Preparation of which has good adhesion and flexibility, as well as good matching of the primer paint, paint color plates to improve the performance of critical. Because of domestic coil coatings in the variety and quality of foreign products are lagging behind, resulting in the production of color plates manufacturers, had to use expensive imported paint, which greatly affect our color board industry. To this end, the experts called for: the domestic industry breakthrough color coated with epoxy primer as soon as there is a bottleneck.
Because many factors, primer preparation is a complex process. Recently researchers have national determined by the orthogonal experimental factors on the performance of epoxy primer, with fewer steps to reasonably determine the best formula, the film has obviously obtained the hardness and solvent resistance advantage and excellent adhesion performance. According to experts, they focus on the selected pigment to binder ratio, crosslinker, catalyst, defoamer, reduce the surface activity of additives, wetting 6 dispersant factors. Selected cross-linked urea-formaldehyde resin curing agent is a SM-526, results show: the amount of crosslinking agent on the adhesion of the film the greatest impact on the MEK wiping performance and resistance to bending also affected, had no effect on the film hardness.
The amount of 4 experiments had no significant effect on hardness (mean are all 5.0); crosslinking agent adhesion amount of 10% better (average reached 0.3), anti-MEK wipe the relatively poor performance of some good bending properties ; 15% in addition to the same level of hardness and other 3, the other properties are poor; 20% wipe-resistant properties and bending properties of MEK are the best adhesion general (mean 1.3); 25% MEK wipe-resistant film the best performance and hardness, the other two kinds of poor performance. Taking into account the machinability of color plates, the researchers selected crosslinking agent amount of 20%. Experts said the research off to a good start, but need further study to a real breakthrough in color-coated with epoxy primer bottleneck.
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