aochengchem: Using method of silane coupling agent

Application method of silane coupling agent has two kinds: one is to mix the silane with aqueous solution, and use it again after treatment of inorganic powder mixed with organic polymer or resin binders, namely pretreatment method; Another method is to silane and inorganic powder (such as packing or pigment) and organic polymer binders, namely migration method. The former method of surface modification treatment effect is good, is a common method of surface modification.
Most of the silane coupling agent to match into aqueous solution before use, even if its hydrolysis in advance. Hydrolysis time according to the varieties of the silane coupling agent and pH value of solution vary, ranging from a few minutes to tens of minutes. General control configuration of the aqueous solution pH value between 3 ~ 5, pH value is higher than 5 or less than 3 will promote the formation of polymer. Therefore, has been configured, hydrolysis of silane coupling agent can't placed too long, otherwise it will polycondensation and failure on its own.
The dosage of the silane coupling agent is related with coupling agent varieties and the area of the packing, silane coupling agent the parcel cover according to the different varieties of the silane coupling agent vary. When it is not know the specific surface area of inorganic powder data or the minimum coated area of the silane coupling agent, dosage of silane coupling agent can be selected for the quality of inorganic powder 0.10% ~ 1.5%.
Most of the silane coupling agent can be used for surface modification of dry, can also be used for wet surface modification.