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Light Diffusing Adhesive Patented by 3M



Published August 9, 2005
Light Diffusing Adhesive
Patented by 3M
l Patent No. U.S. 6,288,172 B1
3M Innovative Properties has been awarded a patent for a light diffusing adhesive.
The product is comprised of a PSA matrix with a refractive index of n1 filled with organic polymeric microparticles having an average diameter of about 0.5 µm to about 30 µm and having a refractive index of n2, such that n1-n2 is in the range of 0.01 to 0.2 and the combination of the PSA matrix and the organic polymeric micro-particles has a transmittance of greater than 80% of incident intensity and a backscatter of less than 20%. The PSA matrix is a film former or a pressure sensitive microsphere-based adhesive composition and the organic polymeric microparticles are prepared from fluorinated acrylate monomers or fluorinated methacrylate mono-mers having refractive indices in the range of 1.34 to 1.44.


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