| Predicate |
Object |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-306
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B1-041 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F299-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02C7-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F290-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F7-027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F7-004
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F12-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 |
| filingDate |
1991-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2002-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6b05c627b980108280af207f28e1cf23
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c2bc5ba194bd1ee71f0374afbe1aa50 |
| publicationDate |
2002-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2091903-C |
| titleOfInvention |
Copolymerization process and optical copolymer produced therefrom |
| abstract |
A process for preparing a copolymer suitable for use in an optical element which comprises the step of radically-polymer-izing a composition which comprises at least one first monomer represented by formula (I), at least one second monomer repre-sented by any one of formulas (II, III and IV), and 0.005 to 1.0 weight percent of said polymerizable composition of an organic chain transfer agent having a chain transfer coefficient at 50-60°C of greater than 0.5 with acrylic monomer or styrenic monom-er; in the presence of a radical polymerization initiator, is disclosed. Also disclosed is a copolymer suitable for use as an optical element obtained by the foregoing process and an optical element comprising this copolymer. The process of the disclosure pro-vides essentially striation-free polymers which can be used to fabricate optical elements including thick lenses for glasses. |
| priorityDate |
1990-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |