FIELD: chemistry.
SUBSTANCE: composition comprises a multimodal random propylene copolymer with, at least, one comonomer selected from alpha-olefin with 2 or 4-8 carbon atoms and a nucleating agent that is different from the beta-nucleating agent. Herewith a random propylene copolymer contains, at least, random propylene copolymer having low molecular weight (low molecular weight fraction (LMW)) and random propylene copolymer having a high molecular weight (high molecular weight fraction (HMW)). The comonomer content of the propylene copolymer is of 4.0 to 14 mol %. The composition has impact resistance of Charpy notched specimens at 23°C of, at least, 30 kJ/m, determined according to ISO 179/1eA:2000, and the crystallization temperature Tc of 105°C to 120°C.
EFFECT: produced composition of the nucleated random propylene copolymer has improved balance of characteristics with respect to mechanical properties, including impact strength and processing properties.
17 cl, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
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|
RU2626395C2 |
| COMPOSITION OF MULTIMODAL POLYPROPYLENE FOR APPLICATION IN PIPES | 2014 |
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RU2625794C2 |
| MULTIMODAL POLYPROPYLENE COMPOSITION FOR APPLICATION IN PIPES | 2014 |
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RU2626394C2 |
| COMPOSITION OF RANDOM SOPOLIMER PROPYLENE FOR PIPE APPLICATIONS | 2014 |
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RU2627360C2 |
| MULTI-MODAL POLYPROPYLENE WITH REGARD TO THE CO-MONOMER CONTENT | 2014 |
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RU2657872C1 |
| COMPOSITION OF HETEROPHASE POLYOLEFIN WITH ENHANCED OPTICAL PROPERTIES | 2018 |
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| POLYPROPYLENE MIXTURE FOR TUBES | 2012 |
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RU2560723C1 |
| RUBBER COMPOSITION WITH SUPERIOR IMPACT STRENGTH AT LOW TEMPERATURE | 2013 |
|
RU2654698C2 |
| COMPOSITION | 2019 |
|
RU2813714C2 |
| POLYPROPYLENE BOTTLES | 2011 |
|
RU2526260C2 |
