Crosslinking agent, also known as crosslinking agent, is an important part of polyhydrocarbon photoresist. The photochemical curing effect of this photoresist depends on the crosslinking agent with dual photosensitive functional groups to participate in the reaction., The cross-linking agent produces double free radicals after exposure, which interacts with polyhydrocarbon resins to form bridges between polymer molecular chains and become insoluble substances with a three-dimensional structure.

Nature It is often a substance containing multiple functional groups in the molecule, such as organic dibasic acid, polyol, etc.; or a compound containing multiple unsaturated double bonds in the molecule, such as divinylbenzene and diisocyanate,N,N-methylene Base bisacrylamide(MBA) and so on. It can be fed together with monomers, after polycondensation(or polymerization) is cross-linked to a certain extent, so that the product becomes an insoluble cross-linked polymer; it can also retain a certain number of functional groups(or double bonds) in the linear molecule, and then add it Specific substances are cross-linked, such as curing of phenolic resin and vulcanization of rubber.

Function Crosslinking agents are mainly used in polymer materials(rubbers and thermosetting resins). Because the molecular structure of polymer materials is like a long line, it has low strength with each other. Connected together to form a network structure, which improves the strength and elasticity of the polymer material. The crosslinking agent used in the rubber is mainly sulfur, and an accelerator must be added.