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SUNSPHERES™ 15.0

Optically clear, solid fused amorphous silica microspheres specially engineered for paints, coatings, inks, adhesives, and thermoplastics, including UV curable compositions. These microspheres increase corrosion resistance, reduce shrinkage, improve adhesion and impact resistance, and enhance surface qualities including mar and scratch resistance. The Sunspheres™ 15.0 have a median particle size of approximately 15.0 microns, with 90% of particles passing 45 microns.

Brand: SUNSPHERES (7 products)

Functions: Filler

Chemical Family: Silica

Technical Data Sheet
Enhanced TDS

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Chemical Family
Chemical Name
Composite Materials Functions
Plastics & Elastomers Functions
CAS No.
60676-86-0
EC No.
262-373-8

Features & Benefits

Light Transmission

SUNSPHERES™ 15.0 transmit more than 85% of UV light having a wavelength of 200 nanometers and transmit more than 95% of UV light having a wavelength of greater than 300 nanometers. When dispersed in radiation curable coating formulations, these spheres allow pigmented and/or thick, clear coatings to be cured readily with ultraviolet radiation.

Applications & Uses

Applications
Compatible Substrates & Surfaces
Cure Method
Use Level
10 to 25
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.
Sizing & Use

SUNSPHERES™ 15.0 have a median particle size of approximately 15.0 microns, with 90% of particles passing 45 microns. Recommended dosages are 10 to 25% by weight of total coating formulation. SUNSPHERES™ are designed for use in thick coatings appropriate to their size. In thinner coatings, the SUNSPHERES™ 15.0 provide texture. Given the low surface area of the spheres, the viscosity of the coating resins can be decreased and the use of solvents can be reduced.

Properties

Physical Form
Shape
Solid, Spherical to Well Rounded Microspheres
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Refractive Index1.458nD-
Hardness (Mohs)7--
Softening Temperaturemax. 10000°C-
Strain Pointmax. 6000°C-
pH Value4 - 5--
Coefficient of Thermal Expansion0.48 x 10-6/K-
DC Resistivity1 x 10^8--
BET Surface Area1.2sq.m/g-
Structure/Amorphous SiO2 Contentmax. 99%-
Crushing Strengthmax.. 60,000 psi-
Median Diameter15microns-
Particle Size Distribution
ValueUnitsTest Method / Conditions
45 Microns90%-
22 Microns66%-
11 Microns43%-
5.5 Microns28%-
2.75 Microns13%-
1.375 Microns1%-
0.5 Microns0%-
Shape

Solid, Spherical to Well Rounded Microspheres