| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d1966444097863eaf8cc99198286323e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2054
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2027 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-205
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61K9-2031
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L1-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L5-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K9-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L5-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K47-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K47-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K47-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61K47-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L101-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L5-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L1-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-205
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B37-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-00 |
| filingDate |
2000-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2006-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5029f1ce7f117187dc5c57f12016d8c3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78b9021d19c2cade801c6afaaca198c4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a3e48fb36220dbe24f43de8d0e25ec2 |
| publicationDate |
2006-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-1240230-B1 |
| titleOfInvention |
Swelling and deswelling polymer blends |
| abstract |
A polymer blend is prepared by dissolving chitosan and a second polymer in an acidic aqueous solution to form an aqueous polymer blend, dehydrating said aqueous polymer blend, and recovering said polymer blend. The second polymer may be selected from the group consisting of polyether glycols including polyethylene glycols; cellulose esters including cellulose acetate; poloxamers; polysaccharides including dextran and guar; polyvinylpyrrolidones; polyvinyl alcohols; and mixtures or copolymers thereof. These polymer blends swell in an acidic environment and deswell in a more neutral or basic environment. This technology is valuable for the dispensing of biologically active material or drugs into a surrounding environment, especially the environment as is found in the gastrointestinal tract. Since the various polymer blends of the present invention are not covalently or ionically crosslinked, but are physically combined, each polymer in the physical blend maintains its original chemical structure, and therefore, is safe for oral administration. |
| priorityDate |
1999-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |