http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-856594-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F22-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F222-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F222-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F22-04 |
| filingDate | 1957-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1960-12-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-856594-A |
| titleOfInvention | High molecular weight vinylaromatic hydrocarbon-maleic anhydride copolymers and process for their preparation |
| abstract | A co-polymer with a weight average mol. wt. at least 700,000 of maleic anhydride and at least one of styrene, vinyltoluene and vinylxylene is prepared by heating a 0,5 to 33% solution in methylene chloride of an equimolar mixture of the monomers at 35-45 DEG C in presence of a catalytic amount of organic peroxide. Peroxides mentioned are lauroyl, benzoyl and diacetyl. The co-polymers precipitate from the solution. The slurry can be treated with alkali, e.g. caustic soda to form the salt of the polymer. The alkali metal salts are useful as soil conditioners. Examples describe the co-polymerization of maleic anhydride with (1), (2), (3) and (6) styrene, (4) vinyltoluene, (5) styrene and vinyltoluene.ALSO:Alkali metal salts of high molecular weight copolymers of mallic anhydride with styrene, invyltoluene and/or vinylxylene are useful as soil conditioners. Comparative tests are described which illustrate the effect on percolation, content of water-stable aggregates, water retention and compaction of adding 0,05% of the sodium salt of copolymers of maleic anhydride and styrene to air-dried Miami silt loam soil. |
| priorityDate | 1956-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.