YICHUN CITY KEYUAN CHEMICAL INDUSTRY CO,.LTD
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he form of stabilizer is solid, liquid and mushy. Generally, the lead salt stabilizer is solid, organic tin is liquid, calcium zinc solid mainly, also has liquid and paste.
At present, in the PVC rigid products, most of the stabilizers used by the manufacturers are in the form of powder or flake. It is believed that liquid stabilizer is only suitable for the application of PVC soft products. When it is used for pvc-u, it will affect the performance. The reason is that the liquid stabilizer will plasticize. In fact, the liquid stabilizer only stabilizes the PVC resin, and does not add plastic function. In real production, people will automatically think of organic tin stabilizer when they need to produce PVC transparent products or PVC pipes, fittings or profiles that conform to RoHS directive requirements. Organic tin stabilizer is a kind of liquid stabilizer and can be used in various kinds of PVC products, including soft, semi-soft and hard products. Therefore, as long as the thermal stability meets the processing requirements, the liquid stabilizer can be applied to all PVC products and has nothing to do with the state of the stabilizer itself.
Compared with powder stabilizer, liquid stabilizer has better dispersibility and compatibility, which is beneficial to the smooth process of PVC processing. But so far, there have been no reports on the application of liquid stabilizer in rigid PVC plastic products. Hangzhou 3 leaf fertilizer co., LTD., development, production of KGF - Y 207 multivariate composite organic calcium liquid stabilizer in PVC special-shaped material, successfully and the fitting on the hard products, such as application, really to fill the vacancy. The main components of y-207 products are metals such as calcium carbonate, carboxylic acid salt, carbonate, phenol salt and liquefied nitrogen compounds, epoxides, polyols and other environmentally friendly substances. Because of the microemulsification technology, the particle is controlled in the required scale and the effect of preventing condensation is achieved through surface treatment.
The effect of the size of dispersed phase soap particle size on system stability is:
(1) the particle is small, the Brownian motion is fast, and the system concentration is uniform, which is conducive to stability.
(2) the floating velocity of a particle is proportional to the square of the diameter of the particle.
(3) small particles, small van der Waals force, large repulsion force.
So the smaller the particles, the more stable the system is. However, tiny particles, system energy is high, the thermodynamic instability, and through the surface activity of soap role union with other surfactants effect, can reduce the system energy, conform to the principle of lowest energy.
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