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Momentive TSR9000 for Light Diffusion

Light Diffusion Silicone Resin from Momentive

TSR9000 is a light diffusion additive from Momentive that is based on polymethylsilsesquioxane. The product is featured with a spherical shape, high thermal stability, and narrow particle size distribution that make TSR9000 ideal for use in various plastics and polymer applications, including LED lighting and electronic display applications.


 Momentive TSR9000 Typical Physical Properties:

  • Appearance: Spherical white powder
  • Mean Particles Diameter: 2.0 Microns
  • Weight Loss at 250 °C for 1 hr.:  0.2%
  • pH : 7.0
  • Bulk Specific Gravity: 0.32
  • Particle Specific Gravity: 1.32
  • Refractive Index: 1.42

Why TSR9000?

  • Exceptional light diffusion and lubrication properties for plastics
  • Low refractive index for a matte looking finish
  • Superior heat stability enabling use in high-temperature processes
  • High cross-link density
  • Compatibility with a broad range of polymers, including acrylics
  • Spherical geometry for uniform optical properties and light diffusion properties in organic binders and polymers
  • Uniform spherical shape, tight particle size distribution, and consistent quality
  • Suitable for use in injection molding, extrusion, casting, blow molding, and more
  • No swelling in solvents and no change in optical performance or formulation pot life
  • Outstanding weather resistance

Key Properties for Light Diffusion and Optical Applications:

Refractive Index

TSR9000 is featured with spherical shape particles and low refractive index, which typically provides more efficient light diffusion than methyl methacrylate beads. The diffusion property is attributed to the internal reflection angle. A higher reflection angle results in more effective light scattering and optical properties.


Thermal Stability

TSR9000 is featured with excellent thermal stability so that it can be mixed with plastics in typical polymer processing properties, including extrusion. TSR9000 also offers exceptional color stability and yellowing resistance at high temperatures.

Geometry and Particle Size Distribution:

Due to its narrow particle size distribution and spherical shape, TSR9000 silicone resin provides uniform light diffusion properties to plastic and polymeric formulations. TSR9000 is compatible with a variety of polymers, including polycarbonates and acrylics.

Not specified values

Note: Test data. Actual results may vary.

Polycarbonate resin plate with 2% TSR9000

Note: Test data. Actual results may vary.

Optimize and Control The Light Diffusion Angle and Haze in Polycarbonate and Acrylic Resins:

The graphs above show the performance of TSR9000 in polycarbonate resin

TSR9000 vs. PMMA:

* Calculated by Snell's law

Higher ALDA results in better light diffusion properties

The light diffusing properties are typically attributed to the internal reflection angle and the larger delta refractive index. TSR9000 provides higher total reflection angle resulting in more efficient light diffusion compared to the pure resin and methyl methacrylate beads at lower level of use.  



Average light diffusion angle in polycarbonate:

  • 1% TSR 9000: 44°

  • 1% PMMA: 20°

Goniospectrophotometric plot of receiving angle vs. relative transmittance:

  • Relative transmittance = transmittance at a given receiving angle / transmittance at angle 0° (see yellow line, 100 % transmittance)
  • Average light diffusion angle (ALDA): Receiving angle where relative transmittance is 50%


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