| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2345-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2333-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2333-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-1806
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F234-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-3083
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-44 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L45-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F234-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-30 |
| filingDate |
2020-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2021-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
2021-09-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CN-112300325-B |
| titleOfInvention |
Optical film and method for producing the same |
| abstract |
The present invention relates to a copolymer and an optical film containing the copolymer and having negative orientation birefringence. The copolymer comprises 10-60 mol% of acrylonitrile-based monomer units, 10-80 mol% of acrylic acid alicyclic hydrocarbon ester monomer units and 5-80 mol% of vinylene carbonate-based monomer units. The copolymer provided by the application has negative orientation birefringence and excellent phase difference characteristics; the copolymer is easy to prepare and has the characteristic of high glass transition temperature; the optical film made of the copolymer has excellent performances such as high mechanical strength, high light transmittance and low chromaticity index. |
| priorityDate |
2020-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |