This document specifies the terms and definitions, molecular formula, structural formula, relative molecular mass, CAS number, technical requirements, test methods, inspection rules and markings of chain extender styrene, methyl methacrylate and glycidyl methacrylate copolymer. , packaging, transportation and storage. This document applies to chain extender copolymers of styrene, methyl methacrylate and glycidyl methacrylate produced by polymerization reaction using styrene, methyl methacrylate and glycidyl methacrylate as main raw materials. test.