There are a couple of reasons the patties might fall apart: not enough binder or the cooking pan. The binders include bread crumbs, milk soaked bread, crushed crackers, mayo, and eggs. I don't usually like to add the egg to the salmon patties made with raw salmon because it makes the patties too watery. Mayo and bread crumbs have been enough. One of the biggest reasons the patties might fall apart is the pan. Some problems may include: pan has scratches, it's not clean enough, not non-stick, or there is not enough oil.