Abstract: With the use of a kind of epoxy resin glue, a kind of adhesive half-solid matter appeared on the inside surface of resin barrel where was the resin surface, which was called crystallization. In order to solve the crystallization problem of resin matrix, consulting related reference was done in the paper, and related test research was developed at the same time. The results show that, the reason for the resin crystallization was that some unnecessary chemical reaction happened between MeTHPA and 2,4-EMI, which produced a kind of acid amides and carboxylic acid. They could not dissolve in the resin system and thus produce a kind of crystallization chemical substance. The crystallization phenomenon can be avoided effectively when make-up process was modified, namely the 2,4-EMI was added to epoxy resin first, and then preliminary mixture was done, then MeTHPA and assistant agent was added sequentially.

Key words: resin crystallization, 2,4-EMI, MeTHPA, epoxy resin