Selection Principle of Silane Coupling Agent
Posted by cfmats on February 17th, 2019
Among the two types of silane coupling agent having different properties, the Y group is the most important, which directly determines the application effect of the silane coupling agent. The bonding strength of the organic adhesive can be improved only when the Y group can react with the corresponding matrix resin. It is generally required that the Y group be compatible with the resin and can undergo a coupling reaction, so for different resins, a silane coupling agent containing an appropriate Y group must be selected. When Y is an unreactive alkyl or aryl group, it is ineffective for polar resins, but can be used for bonding of non-polar resins such as silicone rubber, polystyrene, and the like. When Y contains a reactive functional group, it should be paid attention to its reactivity and compatibility with the resin used. When Y contains an amino group, it is catalytic, which can be used as a catalyst in the polymerization of phenolic, urea-formaldehyde, melamine formaldehyde, and can also be used as a curing agent for epoxy and polyurethane resins. At this time, the coupling agent fully participates in the reaction to form a new bond. Aminosilane-based coupling agents are of a general-purpose type and can be coupled to various resins, except for polyester resins. The type of X group has no effect on the coupling effect. Therefore, depending on the kind of the reactive group in the Y group, the silane coupling agents are also referred to as vinyl silane, amino silane, epoxy silane, mercapto silane, and methacryloxy silane, which is the most commonly used silane coupling agent.
Hubei Co-Formula New Material Tech Co., Ltd. is recognized globally as an ISO certified manufacturer and a reliable supplier of organosilicon materials. Since its establishment, Co-Formula has been involved in the organic silicone industry, mainly focused on production and marketing of functional silanes, silicone fluids, silicone polymers and additives.
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