We have just introduced the use method of the organosilane coupling agent in detail, so since we want to use it, we must know how to choose it, which is very important. Therefore, based on the years of experience in the silicone industry, Dongguan Jianmeng Silicone will talk about the selection principles when using silane coupling agents.


First, we already know that the hydrolysis rate of the silane coupling agent is taken from the silicon energy group Si-X, and the reactivity with the organic polymer is taken from the carbon functional group C-Y. Therefore, for different substrates or processing objects, it is very important to choose a suitable silane coupling agent. The selected method is mainly through experiments, pre-selection and should be based on existing experience or laws. For example, under normal circumstances, unsaturated polyesters mostly use silane coupling agents containing CH2=CMeCOOVi and CH2-CHOCH2O; epoxy resins mostly use silane coupling agents containing CH2CHCH2O and H2N; phenolic resins usually use silane coupling agents containing H2N and H2NCONH Coupling agent; vinyl silane is mostly used for polyolefin; hydrocarbon silane is mostly used for sulfur-vulcanized rubber.


Secondly, the pre-selected organosilane coupling agent can follow the following rules: Unsaturated polyester can use ethylene, epoxy and methacrylic oxy-type organosilane coupling agent; epoxy resin should use epoxy or amino Type organic silane coupling agent; phenolic resin should choose amino or squirt based type organic silane coupling agent; olefin polymer should choose vinyl type right organic silane coupling agent; sulfur vulcanized rubber should choose sparse group type organic silane coupling Agent.


Third, the choice of organosilane coupling agent is generally based on the face-to-face summary of the organosilane coupling agent side test data, and it is very difficult to accurately predict the organosilane coupling agent. The increased bond strength after using the organosilane coupling agent is a combination of a series of complex factors, such as wetting, surface energy, boundary layer adsorption, polar adsorption, acid-base interaction, etc.


The above is the relevant introduction of Dongguan Jianmeng Chemical on the selection principle when applying organosilane coupling agent. Jianmeng looks forward to cooperating with you. You are welcome to call or log on the company's official website to leave a message for you 24 hours!