Mercaptan is one of the important varieties of epoxy resin curing agent, mainly used in adhesives field. Is a great variety of curing agents of epoxy resin, including room temperature and heating curing agent 2 broad categories, can meet the requirements of most situations. But in the field of low temperature curing speed, only the mercaptan is applicable, it is in rapid repair glue and winter occasions has great advantages, other curing agent cannot be replaced. Because of mercaptan curing agent production technology demand is higher, there is no domestic production, generally for imported products, such as America's 3, 800 grades, application is more common. To fill the domestic blank, we use the preparation of multiple of thiol ester and chain extension method, the preparation of the mercaptan curing agent, and the application research on the curing performance.