Examples of the Application of Organosilane Coupling Agents in the Adhesive Industry

1. In the bonding of metal and non-metal in structural adhesives, if organic silane coupling agents are used, they can condense with metal oxides or with another silanol, thereby tightly contacting silicon atoms with the surface of the adhesive. Adding silane as a tackifier to nitrile phenolic structural adhesive can significantly improve the bonding strength.

2. Silane has been widely used as a treatment agent for bonding glass fibers both domestically and internationally. It can undergo chemical reactions with the interface, thereby improving the bonding strength. For example, if silane coupling agent is not used as a treatment agent for chloroprene adhesive bonding, the bonding peel strength is 1.07 kg/cm2. If amino silane is used as a treatment agent, the bonding peel strength is 8.7 kg/cm2.

3. Coupling agents have special functions in the bonding of rubber with other materials. It significantly improves the bonding strength between various rubbers and other materials. For example, when bonding glass and polyurethane rubber, if silane coupling agent is not used as a treatment agent, the peel strength of the adhesive is 0.224 kg/cm2. If silane is added, the peel strength is 7.26 kg/cm2.

4. Adhesive problems that cannot be solved with conventional adhesives can sometimes be solved with silane coupling agents, such as aluminum and polyethylene, silicone rubber and metal, and silicone rubber and organic glass. Based on chemical bond theory, corresponding silane coupling agents can be selected to achieve satisfactory solutions.

The combination of general adhesives or resins with coupling agents can not only improve the bonding strength, but more importantly, increase the water resistance and durability of the bonding force. Although polyurethane and epoxy resin have high adhesion to many materials, their durability and water resistance are not ideal; After adding silane coupling agent, this performance can be significantly improved.