BreckTech HS-720

Breckenridge Technologies

Breckenridge Technologies · BreckTech

BreckTech HS-720 is a hydrophobic fumed silica treated with polydimethylsiloxane, characterized by its high purity and white colloidal powder form. It is used for applications in adhesives, sealants, composite materials, coatings, inks, cable gels, and toners, particularly for thickening, thixotropy, and anti-settling in complex polar liquids like epoxy, polyurethane, or vinyl ester resins.

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Specifications

Identifiers

Chemical name
Fumed Silica
CAS number(s)
112945-52-5, 7631-86-9
EC number
601-216-3; 231-545-4
Synonyms
Hydrophobic Fumed Silica

Technical specifications

Properties

PropertyValueUnit
Physical StateSolid-
FormPowder-
ColorWhite-
pH3.6-4.5-
Melting Point1700°C
Initial Boiling Point and Boiling Range2230°C
Vapor Pressure0 (at 25°C)Pa
Density2.2 (at 20°C)g/cm³
Solubility in WaterInsoluble-
Partition Coefficientlog Pow 0.53 (at 25°C, n-octanol/water)-

Specifications

Test ConditionSpecificationValueUnitTest Method
-Specific surface area (BET)100 ± 20m²/gGB/T20020
in 4% dispersionpH value4.0 ~ 7.0-GB/T20020
2 hours at 105 °CLoss on drying≤ 0.5Wt%GB/T20020
2 hours at 1000 °C, based on material dried for 2 hours at 105 °CLoss on ignition4.0 ~ 6.0Wt%GB/T20020
based on ignited materialSilica content≥ 99.8Wt%GB/T20020
based on material dried for 2 hours at 105 °CTamped density40 ~ 60g/LGB/T20020
based on material dried for 2 hours at 105 °CCarbon content3.5 ~ 5.5Wt%GB/T20020
Industries
Adhesives & SealantsCASECareElectronics & ElectricalPaints & Coatings
Product groups
SilicasThickeners
Applications
Specialty inksCable gels & tonerAdhesives & sealants formulationsGlass-reinforced compositesCoatings formulations
Functions
ThickenerReinforcement agentThixotropic agentAnti-settling agent
Market segments
Wire & cableElectronic chemicalsCoatingsSealantsAdhesives

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