Propylene-based terpolymer composition for pipes
US12291627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2019 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Mar 10, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a polypropylene composition comprising a terpolymer composition comprising (A) a first terpolymer fraction containing propylene, ethylene and 1-hexene, wherein the first terpolymer fraction has a melt flow rate of 0.005 to 0.20 dg/min determined by ISO 1133-1:2011 (230° C., 2.16 kg) and (B) a second terpolymer fraction containing propylene, ethylene and 1-hexene, wherein the second terpolymer fraction has a melt flow rate of 0.30 to 70 dg/min determined by ISO 1133-1:2011 (230° C., 2.16 kg), wherein the first terpolymer fraction is prepared using a first set of reaction conditions, the second terpolymer fraction is prepared using a second set of reaction conditions and the first and second set of reaction conditions are different, wherein the polypropylene composition (i) has a melt flow rate of 0.10 to 0.70 dg/min determined by ISO 1133-1:2011 (230° C., 2.16 kg), (ii) has a content of ethylene derived units in the range from 1.6 to 3.0 wt %; (iii) has a content of 1-hexene derived units in the range from 1.7 to 4.0 wt %; and (iv) has a ratio of the content of ethylene derived units to the content of 1-hexene derived units in the composition of at least 0.7…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.