Light-diffusing methacrylic resin and process for production thereof
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United States of America Patent
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Apr 2, 1991
Grant Date -
N/A
app pub date -
Nov 28, 1988
filing date -
Nov 30, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There are disclosed a light-diffusing methacrylic resin comprising a dispersion of crosslinked fine particles in a substrate polymer comprising mainly methyl methacrylate and having the characteristics mentioned below: (1) the difference between the refractive indexes of the crosslinked fine particles and the substrate polymer is 0.02 to 0.15. (2) the concentration by weight of the poly-functional monomer used as starting material in the crosslinked fine particles is 5 to 20%, (3) the average particle diameter of the crosslinked fine particles in the light-diffusing methacrylic resin is 5 to 20.mu., the percentage of particles having a particle diameter of 2.mu. or less being less than 1% by weight in the total amount of the crosslinked fine particles to be mixed, and (4) the concentration by weight of the crosslinked fine particles in the light-diffusing methacrylic resin is 0.08 to 10%, and a process thereof.
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