http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1430299-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_58a42c269cc9b961ef568e200ea6f7d3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B1-043 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-325 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F226-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F226-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 |
| filingDate | 1973-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1430299-A |
| titleOfInvention | Copolymers and hydrogels of unsaturated heterocyclic compounds |
| abstract | 1430299 Water-swellable copolymers UNION OPTICS CORP 2 July 1973 31513/73 Heading C3P A water-insoluble but water-swellable copolymer which has been made from a monomer mixture comprising: (A) a heterocyclic N- vinyl monomer containing a carbonyl functionality adjacent to the nitrogen in the heterocyclic ring and/or a hterocyclic N-alkyl monomer containing a carbonyl functionality adjacent to the nitrogen in the heterocyclic ring, the heterocyclic monomers being water-soluble and capable of homopolymerizing to a water-soluble material, and (B) a glycidyl methacrylate and/or glycidyl acrylate and/or glycidyl crotonate, the monomer mixture containing from 40 to 75% by weight of the heterocyclic monomer A, and from 25 to 60% by weight of the glycidyl ester B based upon the combined weight of the monomer A and ester B in the monomer mixture may be prepared by polymerizing the monomer mixture in bulk in the presence of a free radical catalyst at a temperature of from ambient temperature to 150‹ C. A shape retaining hydrogel, e.g. in the form of a contact lens may be prepared by swelling the copolymer with 10 to 90% by weight of an aqueous liquid. In the examples N-vinyl-2-pyrrolidone and glycidyl methacrylate are copolymerized in the presence of tert-butyl peroctoate in circular moulds. The polymer is placed on a contact lens lathe, ground and polished and then contacted with physiological saline solution. |
| priorityDate | 1973-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.