MOLDING MASS ON THE BASE OF POLYOLEFIN AND MOLDED ARTICLES ON ITS BASE Russian patent published in 1998 - IPC

FIELD: production of molded articles having high impact viscosity and high hardness at low temperature. SUBSTANCE: polyolefin molding mass comprises isotactic polyolefin (its index of isotacticity is at least 85 %) being prepared in the presence of metallocene catalyst together which rubber (its glass transition temperature being lower than minus 20 C). Quantity of said isotactic polyolefin is 20-99 mass %, quantity of said rubber being 1-80 mass %. Isotactic polyolefin represents homopolymer or copolymer or mixture thereof on the base of olefin with at least three carbon atoms, it has formula R^a-CH = CH-R^b where R^a and R^b are the same or different and are hydrogen atom, C₁-C₁₀-alkyl or R^a and R^b together with carbon atoms to which they are bond form cycle having 4-22 carbon atoms. EFFECT: improved quality of desired product. 9 cl, 2 tbl