POLYOLEFIN MOLDING COMPOSITION AND MOLDED PRODUCT Russian patent published in 1999 - IPC

FIELD: polymer materials. SUBSTANCE: oil and gas production. Composition contains (i) wax polyolefin prepared from olefin with at least 3 carbon atoms and depicted be general formula R^a-CH=CH-R^b, wherein R^a and R^b, same or different, are hydrogen or C₁-C₁₅-alkyl provided that R^a and R^b cannot be simultaneously hydrogen atoms or R^a and R^b with atoms linking them form cycle, with weighed average molecular weight M_w from 1000 to 50000 g/mol, dispersion of molecular weight M_w/M_n 1.8 to 4.0, reduced viscosity 2 to 50 cu. cm/g, and melting point 120 to 160 C, and (ii) polyolefin prepared from above- defined olefin with molecular weight M_w> 100000 g/mol, dispersion of molecular weight M_w/M_n 1.8 to 4.0, reduced viscosity > 80 cu.cm/g, and melting point 120 to 160 C, or, instead of (ii), olefin copolymer prepared from at least two different olefins with general formula R^a-CH=CH-R^b, wherein R^a and R^b, same or different, are hydrogen or C₁-C₁₅-alkyl provided that R^a and R^b cannot be simultaneously hydrogen atoms or R^a and R^b with atoms linking them form cycle, with molecular weight M_w> 100000 g/mol, dispersion of molecular weight M_w/M_n 1.8 to 4.0, reduced viscosity > 80 cu.cm/g, and melting point 90 to 160 C. EFFECT: increased rigidity and strength. 2 cl, 1 tbl, 27 ex