Recyclable Copper Clad Laminate Using Degradable Epoxy Resin

The patent changes the chemical parameters of the curing agent from conventional non-degradable types to degradable types (such as degradable polyamines with specific molecular structures containing hydrolyzable bonds). This parameter change allows the cured epoxy resin to maintain cross-linked network strength while introducing chemical susceptibility to degradation under controlled conditions, thereby resolving the contradiction between mechanical strength and recyclability

The patent creates a composite material system combining degradable curing agents with epoxy resin and fiber reinforcements. The degradable curing agent forms a cross-linked network that provides mechanical strength, while the embedded fiber structure and copper foil layers create a composite that can be selectively separated through degradation of the resin matrix, thus achieving both strength and recyclability

The patent converts the previously harmful irreversible cross-linking of epoxy resin into a beneficial feature by using degradable curing agents that create cross-links susceptible to controlled degradation. The cross-linked structure that once prevented recycling now enables selective degradation under mild conditions, allowing complete recovery of all components including fibers and resin without environmental pollution

The patent replaces harsh mechanical and chemical recycling systems (crushing, sorting, acid pickling, fire treatment) with a chemical degradation system using mild aqueous solutions at low temperatures. The degradable curing agent enables the resin matrix to decompose chemically under gentle conditions, substituting violent mechanical separation and polluting chemical processes with a controlled chemical degradation approach that recovers all materials