http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9900446-A9
Outgoing Links
Predicate | Object |
---|---|
assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_169f37b7ac0c2f08a26de271d108cdc1 |
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G79-04 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G79-04 |
filingDate | 1998-06-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9ceac8f4a77e7435dc02e1c48504fcf0 |
publicationDate | 1999-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | WO-9900446-A9 |
titleOfInvention | Solution polymerization of high molecular weight poly(phosphoesters) in toluene |
abstract | A process for making a high molecular weight poly(phosphoester) comprising the recurring monomeric units of formula (I), wherein X is -O- or -NR'-, where R' is H or alkyl; L is a divalent organic moiety, with the proviso that L cannot have formula (II); R' is H, alkyl, alkoxy, aryl, aryloxy, heterocyclic, or heterocycloxy; and n is from about 25 to 2000, is described. The process comprises the steps of: (a) substantially dissolving p moles of a di-XH compound in a solvent comprising more than 75 % toluene at a first temperature between about -75 °C and +60 °C to form a reaction mixture; (b) while maintaining the reaction mixture at the first temperature, adding q moles, where p ≈ q, of a phosphorodihalo compound; (c) gradually increasing said first temperature at a rate of less than about 1.5 °C per minute as necessary to achieve a second temperature between about 0 °C and 150 °C, and mixing the reaction mixture at the second temperature to form the polymer of formula (I); and (d) isolating the polymer of formula (I). |
priorityDate | 1997-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 1392.