What is the trend stabilizer

Types and tend to be stable and stabilizing agent for a wide variety of different combinations , in order to better understand its performance and features , must be classified . In several existing classification methods, the most obvious is to be classified according to their chemical composition , followed by its thermal stability, light stability , electrical properties and a hard or soft transparent or opaque article , toxic or non-toxic , and so on various occasions classification. Now titanium dioxide rutile  the main types of stabilizers are as follows : 1 , lead-based stabilizers lead-based stabilizers due to low prices , good stabilizing effect , and therefore is the most widely used stabilizer , which is characterized by : ① electric superior performance, a large number of used in manufacturing insulation products ; ② HCI reaction due to the formation and stability , suitable for the manufacture of transparent articles ; ③ small water absorption, suitable for use in humid environments , because it is toxic and therefore not suitable for low or non-toxic products, In addition, it has the effect of sulfide contamination . Lead stabilizers are the following: ( 1 ) tribasic lead sulfate (3PbO · PbSO4 · H2O): is the maximum amount of use of a stabilizer , for HCl absorption force, shading good , so resistance weather is good, the most suitable for soft and hard in the extrusion process also applies to products with high electrical performance requirements . ( 2 ) Dibasic lead phosphite (2PbO · PbHPO3 · 1/2H2O): It is slightly lower than the absorption of HCl tribasic lead sulfate , but it is heat-resistant , good anti- light performance, UV light has shielding effect, and has antioxidant properties , are particularly useful in the paste PVC , but more than 300 ° C, the article is easy to produce bubbles, it is not appropriate for the processing of high temperature applications. It is used with the appropriate lubricant and good initial stability . ( 3 ) white lead [ Dibasic lead carbonate , 2PbCO3 · Pb (OH) 2]: It is also well- HCl absorber , various properties are good mainly for general soft rolled products , the cable sheath , but not suitable for use in high temperature or longer processing times of the occasion, because the gas leaving it prone to foaming products . ( 4 ) Dibasic acid Lead: good heat resistance , suitable for heat-resistant products , but because  black iron oxide it has the acid group, therefore when used phthalate ester plasticizers , good compatibility , light stability is also good , currently mostly used in high-temperature products . Further, in the production of PVC foam products with the azo dimethylamine , good foamability . ( 5 ) Dibasic Lead Stearate : such stabilizers will not melt at normal operating temperatures , good lubricity , it is generally not as easy to bloom soaps , generally regular and tribasic lead sulfate or dibasic lead phosphite and use, its heat resistance, electrical insulation is good, dibasic lead stearate and lead stearate and use, when appropriate proportion of time to get closer to transparent products. ( 6 ) lead stearate : good thermal stability , the ability to inhibit the initial color , widely used in extrusion, calendering and molded articles . It has good lubricating properties, but plasticizing poor performance, thus limiting its use proportion ( generally the amount of 0.5 to 1.0 parts ) in the recipe . ( 7 ) co-precipitated silica lead silicate : This stabilizer at high temperatures and for a long time , have a good  organic pigments thermal stability , light stability , can be used for spare parts or heat-resistant transparent cable . Its disadvantage is hygroscopic and poor dispersion , care must be taken when using . ( 8 ) tribasic lead maleate : This is a very good heat and light stabilizers , ultraviolet shielding properties, can also get translucent products. The use of chlorine or chlorinated polyvinyl chloride plasticizer occasions , adding tribasic lead maleate , you have better stability.