Silane Coupling Agent - Selection Principle - Hubei Co-Formula Material Tech Co.,Ltd.

Among the two groups of silane coupling agents with different properties, the Y group is the most important, which directly determines the application effect of the silane coupling agent. Only when the Y group can react with the corresponding matrix resin, the bonding strength of the organic adhesive can be improved. It is generally required that the Y group is compatible with the resin and can have a coupling reaction, so for different resins, a silane coupling agent containing an appropriate Y group must be selected.

When Y is a non-reactive alkyl or aryl group, it does not work on polar resins, but can be used in the bonding of non-polar resins, such as silicone rubber, polystyrene, etc. When Y contains a reactive functional group, attention should be paid to its reactivity and compatibility with the resin used. When Y contains an amino group, it is catalytic and can be used as a catalyst in the polymerization of phenolic, urea-formaldehyde, and melamine-formaldehyde, and can also be used as a curing agent for epoxy and polyurethane resins. At this time, the coupling agent completely participates in the reaction and forms new bonds. . Aminosilane coupling agents are general-purpose and can couple with almost all kinds of resins, except for polyester resins. The type of x group has no effect on the coupling effect. Therefore, according to the types of reactive groups in the Y group, silane coupling agents are also called vinyl silanes, amino silanes, epoxy silanes, mercapto silanes and methacryloxy silanes, etc. These kinds of organofunctional silanes is the most commonly used silane coupling agent

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