http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0764181-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b94baf1aad802afc19b0e63b4499b04d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-2538 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G61-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G61-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G61-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-253 |
| filingDate | 1995-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_03eebab670633decafe923cb1e172c3f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a04fc942724f23c543e2525ff56e9dc2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4bcefa4eaa1a1c20389d925f52e6ad6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f9bc922fb93c4be089215e46ed7d1894 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cfa89cf7c47ca253098aa077643af93f |
| publicationDate | 1997-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0764181-A1 |
| titleOfInvention | Continuous process for making romp polycylic olefin polymers |
| abstract | A continuous process for the solution polymerization of appropriate polycycloolefins in a ROMP zone to obtain a processable ROMP homo- or copolymer in solution, and subsequent hydrogenation of the ROMP (co)polymer without removing the residual ROMP catalyst and co-catalyst, provides an optical product having a mol wt Mw in the range from 50,000-300,000 and polydispersity Mw/Mn in the range from 1.3-5.0, more preferably from 1.3-3, the lower the polydispersity the more desirable the physical properties of the (co)polymer. The process comprises, (A) continuously polymerizing a substantially anhydrous solution of said monomer by ring opening metathesis polymerization in at least a first and a last reaction zone of a multi-zoned, single-stage, reaction vessel to form an unsaturated polymer cement essentially free of unreacted monomer; (B) hydrogenating said unsaturated polymer cement in the presence of an effective amount of a nickel-containing hydrogenation catalyst in an amount sufficient to produce a hydrogenated cement wherein more than 97 % of double bonds in said unsaturated polymer are converted to single bonds; (C) removing more than 99 % by weight of spent polymerization catalyst, used hydrogenation catalyst and filter aid present in said hydrogenated cement to produce an essentially solids-free hydrogenated cement; (D) devolatilizing said solids-free hydrogenated cement to produce a thickened hydrogenated polymer cement, and, (E) recovering a solid polymer which meets particle count specifications for optical grade polymer. |
| priorityDate | 1994-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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