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.

Where is Methylated silica used?

• Coatings and sealants: thixotropic agent preventing sagging while maintaining workability
• Personal care: texture improvement, oil absorption control and skin feel modification in anhydrous systems such as color cosmetics and sunscreens
• Cleaning products: defoamer component in concentrated liquid formulations under high-shear conditions
• Silicone elastomers and polymer compounding: matrix reinforcement and hydrophobic surface characteristics resisting moisture uptake
• It controls flow, suppresses foam and modifies surface behavior in non-aqueous and aqueous systems.

Commercial specifications

• Fine white powder with varying degrees of surface treatment and particle size distribution
• BET surface area and carbon content specifications determine performance
• Packaging from multi-wall bags to bulk containers