CAB-O-SIL TS-720 fumed silica is a medium surface area fumed silica which has been surface treated with polydimethylsiloxane (PDMS).
This surface treatment results in a hydrophobic silica with a very different performance than untreated silica.
CAB-O-SIL TS-720 Treated Silica
In comparison to an untreated silica such as CAB-O-SIL M-5 fumed silica and other treated silicas such as CAB-O-SIL TS-610 and CAB-O-SIL TS-530 fumed silicas, CAB-O-SIL TS-720 fumed silica provides very different performance in polar systems.
The charts below demonstrate the efficient thickening and shear-thinning rheology provided by CAB-O-SIL TS-720 fumed silica in an epoxy resin.
The sag resistance as measured by onset of flow of CAB-O-SIL TS-720 fumed silica exceeds that of CAB-O-SIL M-5 fumed silica and even the other treated silicas tested.
After aging at 60°C for 28 days, the epoxy resin containing CAB-O-SIL TS-720 fumed silica maintained sag resistance (onset of flow) unlike the other silicas.
Typical Applications
CAB-O-SIL TS-720 fumed silica is used for rheology control in a wide variety of adhesives, composite and coatings applications:
Epoxy Adhesives and Coatings:
In epoxy adhesives and coatings, CAB-O-SIL TS-720 fumed silica provides good thickening efficiency, sag resistance (or film build) and anti-settling of pigments and fillers.
For applications requiring storage stability, CAB-O-SIL TS-720 fumed silica is recommended.
Polyurethane Adhesives and Coatings:
In polyurethane adhesives and coatings, CABO-SIL TS-720 fumed silica provides the same efficient, stable rheology control as in epoxy systems.
In addition, the hydrophobic surface of CAB-O-SIL TS-720 fumed silica introduces very little moisture into these systems preventing premature cross-linking of moisture cured systems.
Vinyl Ester Laminating Resins and Gel Coats:
While untreated silicas are effective thickeners of unsaturated polyester resins, CAB-O-SIL TS-720 fumed silica is a more efficient, stable rheology control additive for higher polarity systems like vinyl ester laminating resins and gel coats.
Performance Features
CAB-O-SIL TS-720 fumed silica provides the following performance advantages in medium to high polarity systems
• Thickening efficiency
• Sag resistance or high film build
• Anti-settling of pigments and fillers
• Shear-thinning rheological behavior
• Stable rheological performance over time
1.Reinforcing
Improve the tensile strength, tear strength, toughness and impact resistance of the product;
2.Thickening
improving the product consistency of liquid system, rheological control, thickening without thinning;
3.Thixotropy
one touch change, improve the rheological and thixotropy of liquid systems;
4.Anti caking
promote and maintain the fluidity and anti caking performance of powder particles;
5.Anti sagging
prevent the liquid from flowing and sagging, and improve the flatness of the construction surface;
6.Anti sedimentation
improves the adhesion of various systems, effectively prevents layered sedimentation, and is an ideal suspending agent;
7.Thermal insulation
thermal conductivity and excellent thermal insulation effect;
Packaging & Shipping
CAB-O-SIL TS-720 fumed silica is packaged in multi-wall Kraft paper bags and flexible intermediate bulk containers (FIBC's).
It is available in poly-shrouded units containing 18 x 10 lb. paper bags (net weight 180 lbs.) and 18 x 10 kg paper
bags (net weight 180 kg) as well as in 150 kg FIBCs.

Shanghai Youjiatuo Chemical Co., Ltd, a wholly-owned subsidiary of Japan's Aixiu Co., Ltd., is headquartered in Osaka, Japan.
We are dedicated to the research and development of specialty chemicals and committed to serving global customers with high-quality products and excellent services, while also building a safe and healthy environment for our employees and the community.
Our company provides products and solutions to customers in every corner of the globe, serving various key industries such as infrastructure, transportation, environmental, and consumer goods industries.
Currently, we offer high-performance solutions that address our customers' challenges and are continuously improving them to meet future demands.
Main Products
Carbon Black:
Involves 4 major fields: Rubber & Plastic; Ink; Coating; Sealant
Additives:
Defoaming Agent; Rheology Modifier; Substrate Wetting Agent; Wetting Dispersant
Fumed Silica:
• Hydrophilic Fumed Silica
• Hydrophobic Fumed Silica
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Provide different solutions for different needs.
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