Calcium zinc stabilizer is a non-toxic heat stabilizer synthesized by a special composite process, mainly composed of calcium salts, zinc salts, lubricants, antioxidants, etc. It is a thermosensitive polymer material, such as PVC CPVC、 One of the important additives for chloroprene rubber, used to prevent or delay its thermal degradation.
Mechanism of action of calcium zinc stabilizer
1. It can replace active groups in polymer chains (such as chlorine atoms at the allyl position in PVC) to obtain more stable polymers, thereby eliminating the source of dehydrochlorination in polymer materials and reducing the possibility of triggering dehydrochlorination reactions.
2. Can quickly capture the detached hydrogen chloride and inhibit its autocatalytic effect
So what is the role of polyethylene wax in calcium zinc stabilizers? In the processing and manufacturing of various soft and hard PVC products, not only heat stabilizers but also lubricants are required. Calcium has poor lubricity, so wax additives need to be added to enhance the lubrication effect of the product.
The performance improvement of calcium zinc stabilizer by oxidized polyethylene wax is as follows:
1. Oxidized polyethylene wax molecules contain functional groups such as hydroxyl groups, which can enhance the thermal stability of Ca/Zn stabilizers
2. Improve compatibility with PVC, reduce frosting, and enhance printability and heat sealing properties
3. Promote plasticization and improve the flowability of PVC materials
4. Excellent lubrication effect endows rolling, extrusion, injection, and blow molding equipment with good metal demolding properties.
Post time: Dec-21-2024
