http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2226537-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-189 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-183 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-66 |
| filingDate | 2002-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c57e22c5f960a7a7300764358d786a9e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_28bcdebb0c9fe000b24a8c4075501d65 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c10015d460189cf47d20198d154b54e3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ec05a17589e974562d8fae2125498d85 |
| publicationDate | 2004-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2226537-C2 |
| titleOfInvention | Method for preparing complex polyesters and copolyesters |
| abstract | FIELD: organic chemistry, polymers, chemical technology. SUBSTANCE: invention relates to preparing thermostable complex (co)polyesters used as structural and insulating polymeric materials. (Co)polyesters are prepared by interaction on the first stage of terephthalic or 2,6-naphthalene dicarboxylic acid dimethyl ester or their mixture with 1,4-butandiol, or ethylene glycol, or their mixture in the melt at 150-250 C in the presence of tetrabutoxytitanium and a thermostabilizing agent. As a thermostabilizing agent method involves using the synergetic mixture 0.1-0.5% of mass of (co)polyester of the hindered tetraphenol pentaerythryltetrakis-(3,5-di-tert. -butyl-4-hydroxyphenyl)-propionate, 0.1-0.5% of mass of (co)polyester of trinonylphenylphosphite or tri-(2,4-di-tert.- butylphenyl)phosphite and 0.01-0.5% of mass of (co)polyester of sodium or calcium salt of hypophosphorous acid. On the second stage the formed product is subjected for polycondensation at 220- 290 C under vacuum 0.1-0.3 mm of mercury column. Invention provides preparing (co)polyesters with high thermal stability of melt in processing and the initial content of terminal carboxyl groups in the amount less 40•10 -6 g-equiv./g. EFFECT: improved preparing method. 1 tbl, 1 dwg |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2021238384-A1 |
| priorityDate | 2002-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.