Is refers to the 1 gsilane Coupling agent solution can cover the area of the substrate (g / ㎡). If it contains the silicon substrate surface area values (㎡ / g), can calculate monolayer covering the Silane Coupling agent consumption. To handle the packing as an example, the packing surface needed for the formation of monolayer coverage Silane Coupling agentW (g) and the filler surface area S (g / ㎡) and its quality is proportional to the, and WS with Silane can be wetted area (g / ㎡, table 4-29 Chad) is inversely proportional to.
Therefore, the formula for calculating the amount of Silane Coupling agent is as follows:
This method connects the inorganic with the polymer interface through Silane Coupling agent to obtain good wetting value and dispersion. The Silane Coupling agent is diluted with Silane Coupling agent acid for full contact with the treated surface. The solvents used are mostly mixtures of water, alcohol or water alcohols, and water free of fluoride ions and cheap non-toxic ethanol, isopropanol is appropriate. In addition to aminoalkylsilane, acetic acid is added to the solution prepared with its allosilane as the hydrolysis catalyst and the pH is adjusted to 3.5-5.5. Long chain alkyl and phenylsilane are not suitable for water solution because of their poor stability.
The hydrolysis of chlorosilane and acetyloxy silane will be accompanied by severe condensation reaction, and it is not suitable for the production of aqueous solution or hydroxide solution. For Silane Coupling agent with poor water solubility, the non-ionic surfactant with 0.1% to 0.2% (mass fraction) can be added first and then processed into water emulsion by adding water. In order to improve the economic benefits of product hydrolysis stability, Silane Coupling agent can also be mixed with a certain proportion of non-carbon functional Silane. In the treatment of refractory materials, a mixed Silane Coupling agent or carbon functional siloxane may be used together.
After the treatment solution is prepared, it can be treated by impregnation, spray or brush. Generally speaking, block materials, granular materials and glass fiber, etc. are treated by immersion method. Powder materials are mostly treated by spray method. If the whole coating is needed on the surface of the matrix, the brush coating method shall be adopted.