METHOD OF PRODUCING FILLED CHEMICALLY CROSS-LINKED FOAMED POLYOLEFIN AND COMPOSITION OF FILLED CHEMICALLY CROSS-LINKED FOAMED POLYOLEFIN Russian patent published in 2013 - IPC C08J9/00 C08J9/10 C08J9/16 C08J11/00 C08J11/10 C08L23/00 

FIELD: chemistry.

SUBSTANCE: method of producing filled chemically cross-linked foamed polyolefin involves mastication of polyolefin and mixing with target additives: a chemical cross-linking agent, a foaming agent and a decomposition activator in given amounts to obtain a foaming composition, moulding into a sheet workpiece, foaming and mechanical treatment of said workpiece; at the mixing step, chemically cross-linked polyolefin wastes are first added to the foaming composition as filler, said wastes being taken in ratio of 0.1-1:1 (pts.wt) with respect to the weight of polyolefin, followed by further mixing with target additives and mastication in one process cycle which is carried out in a rotary mixer at temperature of 90-150°C. Disclosed also is a composition of filled chemically cross-linked foamed polyolefin.

EFFECT: improved strength properties of filled chemically cross-linked foamed polyolefin, low density, fewer process steps in the method, achieving unique colour and decorative effects.

14 cl, 2 tbl, 12 ex