FIELD: chemistry.
SUBSTANCE: invention relates to a copolymer of propylene and 1-hexene, a method of producing said copolymer and use thereof to make pipes. Described is a propylene copolymer (A), which contains at least 1-hexene as a comonomer with weight content in the range of 1.0-3.0 wt % with partial crystallisation in a β-modification. Weight content of the fraction dissolved in xylene is equal to or less than 2.5 wt %. Described also is a propylene copolymer (A) which contains a β-nucleating agent (B).
EFFECT: improved balance between rigidity, impact resistance and slow crack growth characteristics.
17 cl, 5 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| POLYPROPYLENE MIXTURE FOR TUBES | 2012 |
|
RU2560723C1 |
| PROPYLENE POLYMERS | 2007 |
|
RU2441028C2 |
| POLYOLEFIN COMPOUND WITH LOW COEFFICIENT OF LINEAR THERMAL EXPANSION | 2009 |
|
RU2464288C2 |
| HETEROPHASE POLYPROPYLENE COPOLYMER COMPOSITION | 2010 |
|
RU2510407C2 |
| B-NUCLEINATED POLYPROPYLENE COMPOSITION | 2008 |
|
RU2441890C2 |
| THERMOPLASTIC POLYOLEFINS WITH HIGH FLUIDITY AND EXCELLENT SURFACE QUALITY, OBTAINED IN MULTISTEP PROCESS | 2009 |
|
RU2470963C2 |
| BETA-NUCLEATED PROPYLENE COPOLYMER | 2008 |
|
RU2451698C2 |
| POLYOLEFIN COMPOSITION WITH IMPROVED IMPACT STRENGTH AND BLUSHING RESISTANCE | 2019 |
|
RU2782633C1 |
| TUBES CONTAINING β-NUCLEATED PROPYLENE COPOLYMERS | 2008 |
|
RU2434886C2 |
| THERMOPLASTIC POLYOLEFIN COMPOUNDS HAVING LOW SENSITIVITY TO FLAME TREATMENT | 2010 |
|
RU2506287C2 |
