METHOD OF PURIFICATION OF THE SHEET DOUBLE-LAYER PLEXIGLAS FOR THE COLOR FILTERS Russian patent published in 2006 - IPC B32B27/30 C08F20/18 C08F2/02 C08F2/44 C08F120/18 C08F220/18 

FIELD: chemical industry; glass industry; methods of production of the sheet double-layer colored Plexiglas for the color filters.

SUBSTANCE: the invention is pertaining to the field of production of the sheet double-layer colored Plexiglas on the basis of the methacrylic esters intended for production of color filters including fluorescing color filters. The invention presents the method of production of the sheet double-layer Plexiglas used for manufacture of the color filters and providing for the preliminary polymerization of the methyl metacrylate (MMA) or the mixture of MMA with 1-5 mass % of methacrylic acid (MCA) admixed with the colorant at presence of the azodinitroisoisobutyric acid. The produced colored prepolymer having the conversion level of 3-5 mass % and viscosity 20-50 cSt is solidified in the plane-parallel mold at presence of 0.03-0.04 mass shares per 100 mass shares of the monomer of the azodinitroisoisobutyric acid, 0.4-2.0 mass shares of the coupling agent, 0.5-2.0 mass shares of the light-absorbing additive - the mixture of the dry-rolled paste on the basis of chlorinated polyvinyl chloride and industrial carbon and 0.01-0.1 mass shares of the antiadhesion agent- sodium dioctylsuccinate. Then the preliminary produced prepolymer MMA colored by the coloring agent, which is distinct from the coloring agent of the first layer and having conversion level of 7-10 mass % and viscosity of 70-110 cSt is cast in the mold on the first layer of the Plexiglas and solidified at presence of the initiator, the coupling agent, the light-absorbing additive and the antiadhesion agent used at production of the first layer. The offered method allows production of the double-layer uniformly colored optically uniform Plexiglas with the homogeneous boundary layers non-upsetting the spectral characteristics of the neutrally-gray color filters.

EFFECT: the invention ensures production of the double-layer uniformly colored optically uniform Plexiglas with the homogeneous boundary layers non-upsetting the spectral characteristics of the neutrally-gray color filters.

4 cl, 11 ex, 1 tbl