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HDK® T40

HDK® T40 is a standard synthetic, hydrophilic, amorphous silica produced via flame hydrolysis. It is a white colloidal powder of high purity commonly used in various industrial applications. HDK® T40 finds applications in flexographic printing, gravure printing, industrial wood coatings, inkjet paper, offset printing, and printing inks.

Brand: HDK (36 products)

Chemical Name: Pyrogenic Silica

CAS Number: 112945-52-5

Functions: Reinforcement, Rheology Modifier, Thickener, Thixotrope

Chemical Family: Silica

Compatible Polymers & Resins: Polyvinyl Chloride (PVC), Unsaturated Polyester (UPE)

Synonyms: Fumed Silica, Silica, Silicon Dioxide

Technical Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

CASE Ingredients Features
Materials Features

Applications & Uses

Markets
Applications
Compatible Polymers & Resins
Compatible Substrates & Surfaces
Composites End Use
Industrial Additives End Use
Ink & Toner Type
Plastics & Elastomers End Uses
Applications
  • Adhesives
  • Composites
  • Flexographic Printing
  • Gravure Printing
  • Industrial Coatings
  • Industrial Wood Coatings
  • Inkjet Paper
  • Offset Printing
  • Printing Inks
  • Pulp, Paper & Printing Processes
  • Rheology Control
  • Screen Printing
Application Details
  • HDK® T40 is applied as a thickening and thixotropic agent in many organic systems, e.g. in unsaturated polyesters, coatings, printing inks, adhesives and others, if high gloss and transparency is required.
  • HDK® T40 is used as a reinforcing filler in elastomers, mainly silicone-elastomers. HDK® T40 is used as a free flow additive in the production of powder substances.
  • HDK® T40 is not suitable for pharmaceuticals, food and feed. A good dispersion of HDK® T40 is a must to assure optimum performance.

Properties

Color
Physical Form
Appearance
White colloidal powder
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 20°C, SiO₂)approx. 2.2 g/cm³DIN 51757
Loss of Weight (at 1000°C, 2hours (based on the substance dried at 105 °C for 2 hours))max. 2 %DIN EN ISO 3262-19
Refraction Index1.46--
Silanol Group Density2SiOH/nm²-
SiO₂ Content (based on the substance heated at 1000°C for 2 hours)min. 99.8%DIN EN ISO 3262-19
Specifications
ValueUnitsTest Method / Conditions
BET Surface360 - 440 m²/gDIN ISO 9277 DIN 66132
Loss on Drying (at 105°C, 2 hours)max. 1.5 %DIN EN ISO 787-2
pH (in 4% aqueous dispersion)3.8 - 4.3-DIN EN ISO 787-9
Sieve Residue (min. 40 µm)max. 0.03 %DIN EN ISO 787-18, Mocker Apparatus
Tamped Densityapprox. 40 g/lDIN EN ISO 787-11
Properties

White colloidal powder of high purity.

Regulatory & Compliance

Safety & Health

Safety Notes

During transportation and processing HDK® T40 may cause electrostatic charges. Like other amorphous silicas HDK® T40 does not show either carcinogenic (IARC classification, Volume 68, 1997) or mutagenic properties.

Packaging & Availability

Country Availability
Packaging Type
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • North America
  • Oceania
Packaging Information

Pallet with paper bags: 10 kg bags.

Storage & Handling

Storage Information

HDK® T40 should be stored in the original packaging in dry storage areas. Due to the high surface area HDK® adsorbs volatiles and should be protected from humidity and volatiles. If single bags are taken away from an original pallet, the remaining bags of this pallet must again be protected against humidity and volatiles.