http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-654856-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_14f86e164bb6ab1032c519b42ff81a64 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2810-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2800-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-053 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-56 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-053 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-25 |
| filingDate | 1948-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1951-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-654856-A |
| titleOfInvention | Thermo-reversible gels |
| abstract | A thermo-reversible gel is prepared by treating in acidified aqueous solution a water-soluble polymeric material containing a free oxocarbonyl group with a water-soluble polyhydrazide of a polycarboxylic acid, preferably a dihydrazide of a dicarboxylic acid, examples of suitable compounds being carbodihydrazide, oxalodihydrazide, malonodihydrazide, succinodihydrazide, glutanodihydrazide, adipodihydrazide, pimelodihydrazide and suberodihydrazide. The polymeric material may be: (1) an acylated polyvinyl alcohol obtained by acylating a water-soluble polyvinyl alcohol with diketene as described in Specification 654,855; (2) an interpolymer of an amide of a b -oxo-carboxylic acid and a b ,g -ethylenically unsaturated lower aliphatic amine, such as N-allylacetoacetamide, and a vinyl monomer such as acrylamide; (3) an interpolymer of a major amount of an acrylamide and a minor amount of a b ,g -ethylenically unsaturated lower aliphatic alcohol ester of acetoacetic acid, such as an allyl acetoacetate; or (4) an interpolymer of methyl vinyl ketone with acrylamide, methacrylamide, a -chloroacrylamide, a -fluoroacrylamide or a -bromoacrylamide. The gels of the invention may have incorporated a light-sensitive silver halide to form a photographic emulsion, whose ingredients, in addition to p the gel, may be potassium bromide, potassium iodide, sodium chloride, silver nitrate, ammonium hydroxide, citric acid, dyes and colour-formers. |
| priorityDate | 1947-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.