| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b5fb1f273a88977591dedaf229dee95d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2f2a5e58063418b2fb690db9e955b671
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c749056af88b400631dbb0b086fae345 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-61908
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-61927
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F110-06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-64
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F10-00 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-6192
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-619 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F10-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L23-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-643
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-609 |
| filingDate |
1997-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f1ed0ccb16f53de7a19f40e72270f9e0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_162f2efdb00375608a5575df1865e92c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_974a8d3c9fc9d8c5bf51a85dd6c83615 |
| publicationDate |
1998-03-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9809995-A1 |
| titleOfInvention |
Incorporation of free radical inhibitors in polyolefins |
| abstract |
It has now been found that certain phenolic compounds can be used as free radical inhibitors during polymerization without deactivation of transition metal catalysts. Use of such compounds during polymerization is particularly advantageous when they are substantially free of catalyst inactivating compounds such as less substituted phenols and quinones. The invention includes a process for inhibiting deterioration in a polymer by adding a free radical inhibitor during or before polymerization with a transition metal catalyst. It is not necessary to inactivate the free radical inhibitor since it advantageously does not inhibit the transition metal catalyst activity. The process is preferably preceded by a step of purifying the free radical inhibitor to remove compounds which inhibit catalyst activity such as quinones and phenols which are not sufficiently sterically hindered to avoid inhibiting the catalyst. Additionally, the invention includes a composition comprising at least one olefin monomer, a polymer of the monomer, a transition metal catalyst and at least one free radical inhibitor having sufficient substituents to hinder the active inhibiting group such that it does not undesirably inhibit the transition metal catalyst. The invention is particularly useful when the monomer comprises propylene, styrene or a derivative thereof. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9708418-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7825182-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2012154242-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7371793-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103415560-A |
| priorityDate |
1996-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |