SUNSPHERES™ 200 Nm ST-3

1 of 7 products in this brand

The Sunspheres™ 200 Nm ST- 3 are surface treated*, optically clear, solid fused amorphous microspheres designed for optimum dispersion in coatings, inks, adhesives, and thermoplastics, including UV curable compositions. Cured films show enhanced physical and mechanical properties including increased corrosion resistance, reduced shrinkage, improved adhesion, and enhanced surface qualities such as mar and scratch resistance. This product is particularly useful in improving impact resistance. The average particle size is 200 nanometers and range in size from 50 to 500 nm.

Functions: Filler, Reinforcement

Chemical Family: Carbonates, Silica

End Uses: Aerospace Applications, Lighting Applications, Marine Applications, Primer, Radiation Curable Coating, Solventless & High Solids Coating, Top Coat, Waterborne Coating

Technical Data Sheet
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Identification & Functionality

Chemical Family
CASE Ingredients Functions
Composite Materials Functions
Plastics & Elastomers Functions
CAS No.
60676-86-0
EC No.
262-373-8
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SUNSPHERES™ 200 Nm ST-3 - Particle Image

Features & Benefits

Product Highlights

The Sunspheres™ 200 Nm ST-3 microspheres are surface treated with a methacryl-functional silane for improved dispersion and reaction into polymers such as unsaturated polyester, acrylates, and vinyl esters.

The Sunspheres™ 200 Nm efficiently transmit ultraviolet and visible light from 200 nanometers through the visiblespectrum, while absorbing in the IR range. These engineered fused, amorphous silica microspheres are resistant to temperatures greater than 1000° C and are chemically stable in a vast range of resins and pH.

Dosage is typically 3- 12% by total weight of the finished composition. The average particle size is 200 nanometers and range in size from 50 to 500 nm.

Applications & Uses

Applications
Compatible Substrates & Surfaces
Cure Method
Applications
  1. Reduced shrinkage/improved adhesion.
  2. Impact strength.
  3. Anti-corrosion barrier.
  4. Mar, scratch, and abrasion resistance.
  5. Optical effects/color density.
  6. Oenhanced UV curing.

Properties

Physical Form
Appearance
Fine White Powder
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Refractive Index1.46ND
Hardness (Mohs)max. 8.0
Softening Temperaturemax. 10000 °C
pH Value4.6
Strain Pointmax. 6000 °C
Coefficient of Thermal Expansion0.48 x 10-6/K
X-Ray FormAmorphous
DC Resistivity1 x 10^8
SiO2 Content99.99%
Na2O Content2ppm
BET Surface Area23.52sq.m/g
K2O Content2ppm
Oil Absorption3
Moisture0.07%
Crushing Strengthmax.. 60,000 psi