MULTIMODAL POLYETHYLENE MOULDING COMPOSITION FOR MAKING TUBES HAVING IMPROVED MECHANICAL PROPERTIES
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...
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| creator | ROTKHEFT VERNER FOGT KHAJNTS BERTOL'D JOAKHIM NITTS KHANSJORG SHUL'TE UL'RIKH |
| description | 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
Изобретение относится к полиэтиленовой формовочной композиции, имеющей мультимодальное молекулярно-массовое распределение для изготовления труб. Композиция содержит, мас.%: первый низкомолекулярный этиленовый гомополимер А 45-55; второй высокомолекулярный сополимер В 20-40, содержащий этилен и еще один олефин с 4-8 атомами углерода; третий этиленовый сополимер С 15-30. Дополнительно содержит органическое полиоксисоединение в количестве 0,01-0,5 мас.%. Композицию получают в присутствии катализатора Циглера по трехстадийному способу полимеризации в суспензии. Технический результат - создание формовочной композиции на основе полиэтилена, характеризующейся улучшенной технологичностью без возникновения потеков. 3 н. и 6 з.п. ф-лы, 2 табл., 1 пр. |
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Изобретение относится к полиэтиленовой формовочной композиции, имеющей мультимодальное молекулярно-массовое распределение для изготовления труб. Композиция содержит, мас.%: первый низкомолекулярный этиленовый гомополимер А 45-55; второй высокомолекулярный сополимер В 20-40, содержащий этилен и еще один олефин с 4-8 атомами углерода; третий этиленовый сополимер С 15-30. Дополнительно содержит органическое полиоксисоединение в количестве 0,01-0,5 мас.%. Композицию получают в присутствии катализатора Циглера по трехстадийному способу полимеризации в суспензии. 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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
Изобретение относится к полиэтиленовой формовочной композиции, имеющей мультимодальное молекулярно-массовое распределение для изготовления труб. Композиция содержит, мас.%: первый низкомолекулярный этиленовый гомополимер А 45-55; второй высокомолекулярный сополимер В 20-40, содержащий этилен и еще один олефин с 4-8 атомами углерода; третий этиленовый сополимер С 15-30. Дополнительно содержит органическое полиоксисоединение в количестве 0,01-0,5 мас.%. Композицию получают в присутствии катализатора Циглера по трехстадийному способу полимеризации в суспензии. Технический результат - создание формовочной композиции на основе полиэтилена, характеризующейся улучшенной технологичностью без возникновения потеков. 3 н. и 6 з.п. ф-лы, 2 табл., 1 пр.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WEAPONS |
| title | MULTIMODAL POLYETHYLENE MOULDING COMPOSITION FOR MAKING TUBES HAVING IMPROVED MECHANICAL PROPERTIES |
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