MULTIMODAL POLYETHYLENE MOULDING COMPOSITION FOR MAKING TUBES HAVING IMPROVED MECHANICAL PROPERTIES Russian patent published in 2012 - IPC C08L23/04 C08F10/02 C08F297/08 C08K5/04 C08K5/53 C08F2/18 F16L9/12

Abstract RU 2454443 C2

FIELD: chemistry.

SUBSTANCE: invention relates to polyethylene moulding composition having multimodal molecular-weight distribution for making tubes. The composition contains the following in wt %: a first low-molecular weight ethylene homopolymer A 45-55; a second high-molecular weight copolymer B 20-40 containing ethylene and one more olefin with 4-8 carbon atoms; a third ethylene copolymer C 15-30. The composition further contains an organic polyoxy-compound in amount of 0.01-0.5 wt %. The composition is obtained in the presence of a Ziegler catalyst using a three-step suspension polymerisation method.

EFFECT: producing a polyethylene-based moulding composition characterised by improved processability without formation of drops.

9 cl, 2 tbl, 1 ex

Similar patents RU2454443C2

Title	Year	Author	Number
POLYETHYLENE MOULDING COMPOSITION FOR PRESSURE CASTING FINISHED PARTS	2006	Bertol'D Joakhim Fogt Khajnts Stern Dzhejms Veber Al'Bert	RU2411264C2
MOULDING COMPOSITION PREPARED FROM POLYETHYLENE WITH MULTIMODAL MOLECULAR WEIGHT DISTRIBUTION FOR MAKING PIPES WITH IMPROVED MECHANICAL PROPERTIES	2006	Bertol'D Joakhim Fogt Khajnts Nitts Khans-Jorg Rotkheft Verner	RU2429253C2
POLYETHYLENE MOULDING COMPOSITION FOR MAKING FILMS THROUGH EXTRUSION BLOWING, HAVING IMPROVED PROCESSING PROPERTIES	2006	Bertol'D Joakhim Khajnikke Lutts-Gerd Mejer Gerkhardus	RU2401285C2
POLYETHYLENE MOULDING COMPOSITION FOR COATED STEEL PIPES	2005	Bertkhol'D Joakhim Bem Ljudvig Fogt Khajnts	RU2408620C2
MIXTURES OF POLYOLEFIN RESINS FOR HIGH RESISTANCE TO CRACKING UNDER STRESS AND GOOD RECYCLABILITY	2019	Traisilanun, Saranya Nantasetphong, Wiroj Cheevasrirungruang, Watcharee	RU2784520C2
POLYETHYLENE MOULDING COMPOSITION FOR MAKING FILMS THROUGH EXTRUSION BLOWING, HAVING IMPROVED MECHANICAL PROPERTIES	2006	Bertol'D Joakhim Khajnikke Lutts-Gerd Mejer Gerkhardus	RU2401286C2
POLYETHYLENE COMPOSITION WITH MULTIMODAL MOLECULAR WEIGHT DISTRIBUTION FOR BLOW MOULDING ARTICLES AND PREPARATION METHOD THEREOF	2003	Bertol'D Ioakhim Bem Ljudvig Krjumpel' Peter Mantel' Rajner	RU2393182C2
POLYETHYLENE COMPOSITION FOR BLOW MOULDING, MEANT FOR MAKING LARGE CONTAINERS	2003	Bertol'D Ioakhim Bem Ljudvig Krjumpel' Peter Mantel' Rajner	RU2356920C2
POLYETHYLENE COMPOSITION FOR MANUFACTURING BARRELS WITH TWO DISCHARGE HOLES	2003	Bertol'D Ioakhim Bem Ljudvig Krjumpel' Peter Mantel' Rajner	RU2360935C2
POLYETHYLENE COMPOSITION FOR MOULDING WITH INFLATION FOR SMALL CONTAINER MANUFACTURING	2003	Bertkhol'D Ioakhim Bem Ljudvig Krjumpel' Peter Mantel' Rajner	RU2350633C2

RU 2 454 443 C2

Authors

Bertol'D Joakhim

Nitts Khansjorg

Rotkheft Verner

Shul'Te Ul'Rikh

Fogt Khajnts

Dates

2012-06-27—Published

2007-10-19—Filed