Organotin stabilizers may be used alone

also for both the transparent where good thermal stability , but can also be the barium , cadmium compounds mixed to obtain a synergistic effect .
Tin stabilizer good machining properties , they are particularly suitable for rigid products . While its light stability than barium / cadmium stabilizer better , but some in the processing of organic tin to arouse tacky lubricant is therefore required to be adjusted . Tin plastic lubricant  compounds containing sulfur and lead compounds contaminating action will occur , so the two should be avoided in combination .
( 1 ) Dibutyl tin dilaurate : The stabilizers can be made very transparent products , soft products are often used in the . Its processing temperature is not too high , the quality of the products, processing Chin have sufficient thermal stability and good light stability.
( 2 ) two maleic acid butyl tin : its thermal stability than dibutyltin dilaurate is good, especially for hard injection or extrusion products. Processing temperatures up to 200 ° C or more, with PVC foaming board stabilizer  good light stability . Such stabilizers prevent the contaminating action of vulcanization , the sulfur can effectively replace the tin compounds . The disadvantage is that at high concentrations may bleed , while in the process of irritating gases released .
( 3 ) a sulfur-containing tin stabilizers : This type of material has a maximum thermal stability , but also can obtain good product transparency , it is widely used for a transparent extruded products in rigid . Usually the hard composition an amount of about 2.0 ~ 3.0Phr, be less soft . Because they have no lubrication, so the application must be added the right amount of lubricant.
( 4 ) n-octyl tin salts : All of the tin compounds , in addition to other n- octyltin are toxic , so it is suitable for non-toxic products. Its characteristics with sulfur-containing tin compounds are close , suitable for hard or soft transparent tube. 4 , the stabilizer tends Although a variety of different stabilizers and combinations of the number of rapid growth, but lead compounds is still by far the most  low molecular polyethylene widely used . Lead stabilizer also has drawbacks , chief among them :
( 1 ) toxicity.
( 2 ) to achieve the required degree of stability , a higher dosage .
{3 ) a large proportion of the volume of products to make steady increase in cost .
( 4 ) so that the plastic colored transparent products can not be produced ( except for certain lead compounds ) .
( 5 ) in the plastic dispersion is difficult .
Especially the toxicity of lead compounds , these dust -like powder in a pinch and toxic or plasticizing process of the operator's health has been compromised. Therefore, only valid when the suction removal equipment can be directly applied to the open type kneading machine, and preferably a stabilizer way sucked plasticizer added to the appropriate ground pulp , or the manufacturer of the lead salt was crisp like , pasty , granular or liquid , particularly liquid lead stabilizers , which can reduce the relative amount in the formulation , not only eliminates the risk of toxic dust , and the ratio of solid and slurry pipelines easier to avoid dust emissions, to prevent lead poisoning.
In the selection of a stabilizer , to take into account the savings with lead . Therefore , the choice of stabilizing effect of a good multi-component composite stabilizer is necessary. Other liquids used stabilizer is improved dispersion stabilizer effective way . Especially cadmium / barium / zinc and epoxy compounds and chelating agents , such combinations are often applied liquid stabilizer , in addition, lead stearate pulp, pulp cadmium , barium pulp powder flying can also be changed for improvement .
Composite stabilizer applications, but also stabilizing agent with one important development process . Indeed, some soaps can be applied individually, after mixing with other stabilizers has a good synergistic effect . The method of the composition of mixed system , not only the individual simply mixed with each other stabilizers , and metal soap -based stabilizers in the manufacturing process to be coprecipitated . For example, barium laurate / cadmium , etc., so the effect will be more significant. Now the application has become more complex mixture including barium / cadmium organic salts , zinc soap antioxidants , ultraviolet absorbers, chelating agents , and epoxy compounds .