What Are the Different Types of Epoxy Adhesive?

Epoxy adhesive is a polyurethane prepolymer modified epoxy resin (component A) and a self-made curing agent (component B) at a ratio of 10: 1 to 1: 1 (weight ratio). 2. Reactive curing system. The polyurethane prepolymer is an isocyanate group-terminated polysiloxane polyurethane prepolymer that is reacted with hydroxyl-terminated polysiloxane and diisocyanate at a certain ratio and under certain conditions. Modified. The self-made curing agent is composed of a diamine, an imidazole compound, a silane coupling agent, an inorganic filler, and a catalyst.

Epoxy adhesive

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Epoxy adhesive is

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(1) epoxy resin contains multiple

(1) When it is not toughened, the cured product is generally brittle, with poor peel resistance, crack resistance, and poor impact resistance.

(2) Low adhesion to materials with low polarity (such as polyethylene, polypropylene, fluoroplastic, etc.). Surface activation must be performed first.

(3) Some raw materials such as

In order to design the optimal formula of epoxy adhesive and achieve the required bonding performance, it is necessary to understand the adhesion mechanism of epoxy adhesive and the failure mechanism of bonding. A lot of research has been done in this respect, and many theories have been proposed. Although there are still some shortcomings, many practical problems have been clarified and solved, which greatly promoted the development and application of epoxy adhesives.