Heat Stabilizers for PVC
Introduction
Heat Stabilizers for PVC is essential in PVC processing, can prevent PVC in the processing process due to thermal and mechanical shear caused by degradation, and make the products in the process of processing and storage and use in the process of good durable weather resistance.
Product function
Polyvinyl chloride (PVC) has excellent corrosion resistance, flame retardant and Gao Lixue properties, but due to the structure of PVC contain a double bond, branching points, and the initiator residues, such as heated to 100 oc with dehydrochlorination reaction, degradation in processing (170 oc) or higher temperature, the degradation reaction is accelerated, the macromolecular crosslinking quickly.Therefore, the introduction of stabilizer in PVC formula, stability is also known as stabilizer, in a broad sense, in order to improve the thermal stability of the polymer added substances, can be called Heat Stabilizers for PVC.
The selection principle of the Stabilizers
(1) High thermal stability and good light stability.
(2) Good compatibility with PVC, good swing, no rising, no migration, no frost spraying, not easy to be extracted by water, oil and other solvents.
(3) With proper lubricity, there is no pressure out in the process of arrest, no scaling.
(4) It does not react with other additives and is not polluted by sulfur, copper and other substances.
(5) Do not reduce the electrical properties and printing properties of the products and other secondary processing properties.
(6) Non-toxic, no abnormal smell, no pollution, can be made transparent products.
(7) Easy to use processing, low price.
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