How to choose organosilane coupling agent

It is necessary to comprehensively consider the composition of the material and its sensitivity to the reaction of silane coupling agents. To improve hydrolysis stability and reduce modification costs, trialkylsilane can be added to silane coupling agents for use; For difficult to stick materials, polymers crosslinked with silane coupling agents can also be shared. How to choose organosilane coupling agent?

When silane coupling agents are used as thickening agents, they mainly form chemical and hydrogen bonds with polymers; Wetting and surface energy effects: achieved by improving polymer crystallinity, acid-base reactions, and the generation of interpenetrating polymer networks. The increase in viscosity mainly revolves around three systems:

1. Inorganic materials versus organic materials;

2. Inorganic materials to inorganic materials;

3. Organic materials to organic materials.

For the first type of bonding, it is usually required to bond inorganic materials to polymers, with priority given to the reactivity of Y in the silane coupling agent with the functional groups contained in the polymer. The latter two belong to the same type of bonding between materials, so the silane coupling agent itself is used for hydrophilic polymers and inorganic materials that require increased adhesion.

1. Unsaturated polyethylene glycol can be used as ethylene based, epoxy based, and methacryloxy based organic silane coupling agents;

2. Epoxy resin should use epoxy based or amino based organosilane coupling agents;

3. Phenolic resin should use amino or substituent based organosilane coupling agents;

4. Ethylene based right-handed silane coupling agents should be selected for olefin polymers;

5. Sulfur vulcanized rubber should use hydrophobic organic silane coupling agents, etc,

By following the above selection principles, you can choose the appropriate silane coupling agent for yourself