Methylated silica

Methylated silica (CAS 67762-90-7), also known as dimethyl silicone polymer with silica, is a surface-treated amorphous silica in which silanol groups are replaced with hydrophobic methyl groups.

This modification converts standard hydrophilic silica into a material that controls flow, suppresses foam, and modifies surface behavior across a broad range of non-aqueous and aqueous systems.

In coatings and sealants, it functions as a thixotropic agent, preventing sagging in applied films while maintaining workability during mixing and application for industrial users.

Personal care formulators incorporate it into anhydrous systems such as color cosmetics and sunscreens to improve texture, control oil absorption, and modify skin feel for consumers.

Industrial and household cleaning products use it as a defoamer component, particularly in concentrated liquid formulations where foam suppression must persist under high-shear conditions.

In silicone elastomers and polymer compounding, it reinforces the matrix while contributing to hydrophobic surface characteristics that resist moisture uptake and environmental degradation.

Methylated silica is supplied as a fine white powder with varying degrees of surface treatment and particle size distribution. It is available in technical grade for various uses.

Specific BET surface area and carbon content specifications determine performance in a given application. Packaging typically ranges from multi-wall bags to bulk containers depending on volume.