R=Methyl, Butyl, Octyl
According to the Y group, the organic tin heat stabilizer divided into two categories.
- mercaptide and organic tin sulfides
- organic tin carboxylate and maleate
The difference between monoalkyl and dialkyl tin mercaptide
Monoalkyl tin mercaptide has good initial color (low yellow index YI). Dialkyl tin mercaptide performs long-term stability and compares with monoalkyl tin mercaptide, its color accumulation lags but the initial yellow color index is higher. So the mixture of monoalkyl tin mercaptide and dialkyl tin mercaptide with proper proportion can achieve superior effect. Generally, the product of industry grade is compound. As the table showing: