Predicate |
Object |
assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7e988961e93fcebe97fb0bdca6d71ca1 |
classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-139 |
classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L9-127 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L57-02 |
classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F16L57-02 |
filingDate |
2013-08-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_37049721244c3aac47542328a4224b77 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_44a8373dea6660bcd4ff3b39f97facf5 |
publicationDate |
2015-07-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber |
US-2015211673-A1 |
titleOfInvention |
Pipes |
abstract |
Industrial size pipes comprising copolymers of ethylene and an alpha-olefin having (a) a density (D) in the range 933-948 kg/m 3 (b) a melt index (MI 2 ) in the range 0.15-2.0 g/10 min, and (c) a melt elastic modulus G′ (G″=500 Pa) in the range 40 to 150 Pa exhibit the improved properties of (a) an extrapolated time-to-failure according to ASTM F2023 and ASTM F2769-10 of at least 50 years (for classification code CL5), (b) a time to failure according to ISO 1167 of at least 10000 hours (110° C. under hoop stress of 2.6 MPa), and (c) a resistance to slow crack growth of at least 5000 hrs according to ISO 13479 (80° C., 9.2 bar). The copolymers are suitably prepared from metallocene catalyst systems. |
isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2019071561-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11479624-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10948377-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108602978-A |
priorityDate |
2012-08-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type |
http://data.epo.org/linked-data/def/patent/Publication |