POLYMERIC COMPOSITION Russian patent published in 2004 - IPC

FIELD: organic chemistry, polymers. SUBSTANCE: invention relates to a method for preparing polymeric composition that can be used for manufacturing articles with decorative interference effect. The composition represents a mixture of granules of four types. Granules of the first type comprise, wt. -%: transparent polystyrene, 1-7. Granules of the second type comprise, wt. -%: copolymer of styrene and acrylonitrile, 83-97. Granules of the third type are prepared from a mixture of the following components, wt.-%: polymethylmethacrylate, 45-75; polystyrene, 5-20; copolymer of styrene and acrylonitrile, 10-30; polyolefin, 2-12. Granules of the fourth type are prepared from a mixture of the following components, wt.-%: polymethylmethacrylate, 10-20 polystyrene, 45-75; copolymer of styrene and acrylonitrile, 10-30; polyolefin, 4-15. Polymers in granules of the third and fourth types are disposed as alternating layers. Invention provides to develop the composite of polymeric composition that provides preparing in material thin, transparent, alternating layers of the definite geometry with different indices of optical refraction in making articles by methods of extrusion and casting under pressure. EFFECT: improved preparing method, valuable properties of composition. 3 cl, 4 tbl, 16 ex