How to control the oil absorption value of magnesium hydroxide

The way to reduce the oil absorption value of magnesium hydroxide.

1)Control particle morphology

The oil absorption value of magnesium hydroxide and the production process has a great relationship between high and low. In the case of no special requirements for particle morphology, can use crystal shape control agent, control the crystal shape and specific surface area, so as to reduce its oil absorption value.

2)Control fineness and particle size distribution

Ordinary field of magnesium hydroxide product application, the fineness and particle size distribution requirements are not high, can be appropriate to choose the particle size distribution gap between the compound product, so that small particles will enter the large particle space, the stacking density becomes larger, the overall oil absorption of the product will be reduced.

3)Surface modification

Surface modification is one of the important means to effectively reduce the oil absorption value of the powder. After the surface modification of magnesium hydroxide, the aggregated state particles reduce, dispersion improve, the gap between the particles reduce, in addition, the modified molecules make the surface polarity of magnesium hydroxide weaken, the friction between the particles reduce, lubricity improve, the powder accumulation more closely, the accumulation density increases, oil absorption value naturally reduce.