Hydrophobic Precipitated Silica Supplier

High-Performance Hydrophobic Precipitated Silica Series

Product Code	Desription	TDS
Hydrophobic Precipitated Silica LC-HPS400	LC-HPS400 hydrophobic precipitated silica is prepared by treating precipitated hydrated silica with high hydrogen containing silicone oil.
Hydrophobic Precipitated Silica LC-HPS402	LC-HPS402 hydrophobic precipitated silica is prepared by treating high hydrogen containing silicone oil with precipitated hydrated silica.
Hydrophobic Precipitated Silica LC-HPS404	LC-HPS404 hydrophobic precipitated silica is prepared by surface treatment of hydrophilic precipitated silica using in-situ modification.
Hydrophobic Precipitated Silica LC-HPS406	LC-HPS406 is a product prepared by surface treatment of hydrophilic precipitation method silica with different silane coupling agents.

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The Application Case of Hydrophobic Precipitated Silica

LANCHEMIE Hydrophobic Precipitated Silica, with uniform silane grafting modification, excellent long-term hydrophobicity and outstanding cost-performance ratio, is widely deployed in diverse industrial sectors as a high-efficiency functional filler worldwide.

In tire and general rubber manufacturing, it serves as a core reinforcing filler, significantly improving rubber's wet grip performance, reducing rolling resistance for energy-saving green tires, while enhancing water resistance, aging resistance and mechanical strength of industrial seals, conveyor belts and shoe soles, with a remarkable cost advantage over fumed silica alternatives.

In industrial coatings, wood paints and printing inks, it acts as a premium matting agent and rheology modifier, delivering excellent anti-settling and anti-sagging performance, while boosting coating film's water repellency, scratch resistance and weatherability. It also excels as an anti-caking flow aid in agrochemicals and feed additives, preventing moisture-induced caking during storage.

The Production Process of Hydrophobic Precipitated Silica

LANCHEMIE Hydrophobic Precipitated Silica is produced via a two-stage, closed-loop process combining precipitation synthesis and in-line surface modification. First, sodium silicate reacts with sulfuric acid under controlled pH, temperature and agitation to form amorphous silica slurry. It is then filtered, thoroughly washed to remove salts, and dried to obtain hydrophilic precipitated silica base.

In the second stage, the base is dispersed and reacted with silane modifiers in a continuous wet-phase system. Hydrophobic alkyl groups covalently graft onto particle surfaces, replacing polar silanol groups. After filtration, low-temperature drying and jet milling, the final product features uniform hydrophobicity, low moisture absorption and excellent dispersion in non-polar systems.

Strict DCS control ensures stable particle size, surface area and carbon content, delivering consistent quality compliant with REACH and RoHS.

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Hydrophobic Precipitated Silica - Industrial Grade Silica

High-Performance Hydrophobic Precipitated Silica Series

The Application Case of Hydrophobic Precipitated Silica

The Production Process of Hydrophobic Precipitated Silica