Environment-friendly PVC Ca-Zn Composite Heat Stabilizer
1. Product Descriptions:
Environment-friendly PVC Ca-Zn Composite Heat Stabilizer is one kind of non-toxic efficient stabilizer, which is made of organic chelating agent, modified hydrotalcite, organic zinc, organic calcium and high efficient lubricant. It is mainly used in soft and hard PVC fields. For example, water supply pipes, appliance profiles, wire and cable, automative sealing and medical products.
(1)For extruded pipe products;
(2)For highly filled extruded products;
(3)For windows and doors, cabinets profile products, including home appliances;
(4)For wire, cable, soft products;
(5)For sealing strip, door seals soft products.
3. Working Principles:
Because the PVC molecular backbone contains the unstable chlorine atoms, when it is heated to melt, the PVC molecular prones to make the dehydrochlorination autocatalytic degradation reactions, to make products discoloration and deterioration of physical and mechanical properties. The traditional approach is to add heat stabilizer that contains heavy metals (lead, barium, cadmium and so on) single salt or hydroxy acid salt.
However, due to impact on environment and human health, in 2003, the EU implemented R0HSWEEE, REACH and other environment regulations. Since 2007, China has gradually accellerated the pace of lead ban. As a result, our company produce a new series of Environment-friendly Ca-Zn Composite Heat Stabilizer.
4. Technological Progress:
(1)Apply the wet modification method to process oil-soluble magnesium carbonate aluminum hydrotalcite and control the grain size of hydrotalcite to 0.5μm or less.
(2)Mix the organic chelating agent with high metal content of fatty acids calcium, aromatic zinc and modified hydrotalcite. The organic heat stabilizer is better than similar products in the United Kingdom, Singaport or Germany.
(3)Overcome the shortcomings of large amount of calcium and zinc, high cost and limited ranges.
5. Physical Properties:
(1)Appearance: White-slightly yellow powder;
(2)Specific Gravity: 0.8 to 1.13;
(3)Moisture Content: Less than 2.5%;
(4)Melting Range: 80 degree centrigrade~150 degree centrigrades.