| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_69f6d7152ac7762c0882ec3dc9584636
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0e77f06144be4708a6ae75bd9fee56a4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e3cdb0b03d713833ffa1d4dabb22f0a8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2bf34b682864733e0464a2eb508f39c1 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-3819
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-384
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-678
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-3617
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02F1-35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-67
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-3836 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-361
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-355
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02F1-35
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-67
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-38 |
| filingDate |
1993-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_cfe8132bdacbad94c5c6f912cd29d0dc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff98b73a3b89dcd7ffebda58c57bcc48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e4c1fd2b17a64af84629ac585b5d3ca |
| publicationDate |
1994-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9401480-A1 |
| titleOfInvention |
Non-linear optically active polyurethanes having high glass transition temperatures |
| abstract |
The invention relates to a non-linear optically active polyurethane comprising a polymeric main chain and a donor-π-acceptor sidegroup, with the sidegroup comprising a rigid donor group which is also part of the polymeric main chain. By incorporating rigid donor groups into the non-linear optically active polyurethane a high glass transition temperature (Tg above 170 °C) is obtained, and hence increased thermal stability. The invention further relates to non-linear optically active polyurethanes having a Tg above 170 °C, and to non-linear optically active waveguides comprising non-linear optically active polyurethanes according to the invention. Suitable rigid donor groups include nitrogen- or sulphur-containing alicyclic groups. In particular, dihydroxy pyrrolidine groups in which the nitrogen atom is directly coupled to the π-acceptor group and dithiafulvene groups were found to be highly suitable for obtaining non-linear optically active polyurethanes of good thermal stability and polarizability. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9723807-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0780722-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5776375-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5872882-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5688896-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5588083-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9628757-A1 |
| priorityDate |
1992-07-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |