Transparent PVC heat stabilizers
Transparent PVC heat stabilizers introduction: PVC heat stabilizer mechanism of action
(1) absorption of hydrogen chloride Me (OOCR), 2 + 2HCl === MeCl2 The + 2HOOCR which Me as follows: Pb, Ba, Cd, Ca, Zn, Sn,, Sb, and Mg, Sr.
(2) elimination of unstable chlorine atom substitution or elimination of unstable chlorine atom.
(3) to prevent auto-oxidation of PVC in the heat of oxygen and shear stress, can easily be oxidized by O2 degradation.
(4) by adding maleic acid metal salts can inhibit or eliminate double bond or shorter and fewer.
Classification
1) lead salt stabilizer
2) metal soaps
3) organotin stabilizers
4) liquid compound heat stabilizers
5) The Ca-Zn composite stabilizer
6) barium zinc composite stabilizer
7), potassium zinc composite stabilizer
Development trends
A) toxic, non-toxic trend
2) organotin stabilizer progress
3) is a salt stabilizer
4)-assisted stabilizer
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