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Specific Use Of Silane Coupling Agent
Apr 22, 2018

(1) Pretreatment filler method

The filler is placed in a solid mixer (Henschel (Henschel) or V-type solid mixer, etc.) and the above silane solution is directly sprayed on the filler and stirred. The higher the rotational speed, the better the dispersion effect. It is generally stirred for 10-30 minutes (the slower the speed is, the longer the time is), and the filler should be dried at 120 degrees Celsius after drying (2 hours).

(2) Aqueous solution of silane coupling agent

(glass fiber surface treatment agent): Glass fiber surface treatment agent often contains: film former, antistatic agent, surfactant, coupling agent, water. The amount of coupling agent is generally 0.3% -2% of the total amount of glass fiber surface treatment agent. The pH of 5 times aqueous solution is first adjusted to a certain value with organic acid or salt. Under sufficient stirring, silane is added until it is transparent, and then added. The remaining components, for the insoluble silanes, can be solubilized with isopropanol. In the drawing process, the glass fiber surface treatment agent is sprayed on the glass fiber and dried to remove the solvent and water.

(3) The bottom surface method

A 5%-20% solution of the silane coupling agent is applied as described above, and the surface of the substrate is immersed by coating, brushing, and spraying. The solution is dried at room temperature for 24 hours, and is preferably baked at 120° C. for 15 minutes.

(4) Direct Join Method

Silane can also be added directly to the filler/resin mixture. When the resin and filler are mixed, the silane can be sprayed directly into the mix. The amount of coupling agent is generally 0.1% - 2% of the amount of filler, (determined according to the filler diameter size). The silane-added resin/filler is then molded (extruded, compression molded, coated, etc.).