PVC heat stabilizers tribasic lead sulphate process

The first part to introduce the coating amount of tribasic lead sulfate on the thermal stability. Then this one to introduce lead salt concentration of PVC heat stabilizers performance. It can be seen as the lead concentration of the solution ( in PbO dollars) from 300 g / L to 400 g / L, thermal stabilization time from 65 minutes to 72 minutes , followed by  an increase as the concentration of thermal stabilization time is no  plastic flame retardant longer growing , tends to level up to 500 g / L, which then began to decrease. Pb concentration is too low , inevitably prolonged coating time to affect production capacity , is not conducive to the formation of a good coating layer is too high or if the lead concentration dropped fast , can cause local too thick , the first portion and the second portion respectively, to introduce the PVC heat stabilizers tribasic Lead sulfate process to  PVC shoes stabilizer take a factor. This section, to introduce two kinds of factors , they are: the ratio of water and slurry over time effects on the thermal stability ; reaction temperature on the thermal stability of time effects .
First, the ratio of water and slurry over time effects on the thermal stability
Means the ratio of water to an aqueous suspension of the filler in water and the weight ratio of inert filler . Means the  black iron oxide ratio of the filler slurry is an aqueous suspension of the water and the weight percent concentration of inert filler .
The following table shows the ratio of water and slurry concentration on the thermal stability of the effect of time can not be uniformly coated on each of inert filler particles , thus affecting the heat stabilizers thermal stabilization time .