The Comprehensive Evaluation of Organic Tin Heat Stabilizer
Pubtime:2013-09-29 10:18:15 Hits:5794 Author：
After releasing since march 18, 2004, the high efficiency, low toxicity or non-toxic stabilizers such as organic tin stabilizer, rare earth stabilizer etc. are adopted by many PVC products manufacturer. Duo to the excellent heat stability, superior transparency, good process property, environment –friendly and low dosage, organic tin heat stabilizer become the priority.
There are many different types of organic tin heat stabilizer, mainly including methyltin mercaptide, methyltin butyltin and octyltin mercaptide. Among them, methyltin mercaptide is the best one after comprehensive evaluation. Our country encourages the development of organic tin heat stabilizer because of its low dosage and excellent process property.
The comprehensive evaluation table as follow
Items
Methyltin mercaptide
Butyltin mercaptide
octyltin mercaptide
Condition
Appearance
Clear and transparent
Light yellow liquid
Light yellow liquid
Tin content
≥19%
17.3-18.5
14-15.4
Specific gravity (25℃)
1.17-1.19
1.080-1.100
Prosperity
Price
Low
high
high
Early stability
Excellent
Good
Good
Lately stability
Good
Good
Excellent
Transparency
Excellent
Good
Good
Lubricity
ok
good
Excellent
Scale deposit
Extreme little
Extreme little
Extreme little
Routine dosage
1.2-1.5
1.8-2.0
2.0-2.5
Toxicity
Approved by American FDA
All the indexes of methyltin mercaptide are better than that of butyltin mercaptide and octyltin mercaptide except lubricity. But it can be improved by adding lubricant. Generally, internal and external lubricants added 0.1-0.2 in the process formula.
Statistics shows that the production cost can be reduced by 200 RMB per ton if methyltin mercaptide is used.
