METHOD OF PRODUCING POLYMER COMPOSITION AND POLYMER COMPOSITION Russian patent published in 2013 - IPC C08L9/00 C08L21/00 C08L47/00 C08K5/53 C08K5/1575 C08J3/205 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a polymer composition. The method of producing the polymer composition includes the following steps: i.) obtaining polymer cement containing a polymer and a solvent; ii.) adding an acetal or ketal of an alditol to the polymer cement; and iii.) separating at least a portion of the polymer and the acetal or ketal of an alditol from the solution to obtain a polymer composition which contains a polymer and an acetal or ketal of an alditol, the polymer containing polydiene or a polydiene copolymer. Described is a version of the method of preparing the polymer composition and the polymer composition for making rubber articles; the acetal or ketal of an alditol can be selected from a group consisting of dimethylidene sorbitol, dibenzylidene sorbitol, di(alkylbenzylidene)sorbitol, 1,3-O-2,4-bis(3,4-dimethylbenzylidene)sorbitol, 1,3,2,4-bis(4-ethylbenzylidene)-1-allylsorbitol, 1,3,2,4-bis(3'-methyl-4'-fluorobenzylidene)-1-propylsorbitol, 1,3,2,4-bis(5',6',7',8'-tetrahydro-2-naphthaldehyde benzylidene)-1-allylxylitol, bis-1,3,2,4-(3',4'-dimethylbenzylidene)-1"-methyl-2"-propylsorbitol and 1,3,2,4-(3',4'-dimethylbenzylidene)-1-propylxylitol.

EFFECT: high resistance to cold flow of the obtained compositions.

11 cl, 5 tbl, 2 dwg, 12 ex