The invention relates to a preparation method for organic
tin type materials, in particular to a green and safe methyl
tin mercaptide preparation method. The green and safe methyl
tin mercaptide preparation method comprises the following steps: (1), tin
processing: putting
metal tin and a first catalyst into a reaction kettle, halogenating after charging methyl
chloride, adding a redistribution agent to perform a tin reaction, distilling, receiving fractions with gas temperature of 150-230 DEG C, and using pure water to absorb, thereby obtaining a methyl
tin chloride water solution; (2), synthesizing: adding the obtained methyl
tin chloride water solution into isooctyl thioglycolate, adding a second catalyst, stirring to react at 5-15 DEG C for 0.2-0.4 hour, adding alkali liquid, continuously stirring to react till a pH value of a
reaction system reaches 7-9, heating to 60-70 DEG C, reacting for 1-1.5 hours, standing,
cooling down, and layering; (3), rinsing; (4) distilling. According to the green and safe methyl tin mercaptide preparation method, a product has high transparency,
weather resistance, compatibility and volatilization
precipitation resistance, and has good
heat stability and low tin content.