http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-794387-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_043c6a4e90e797f67a0e5cb252d30c56 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2215-065 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2215-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2010-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2215-042 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2215-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-085 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-063 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-062 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2207-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10N2050-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2207-282 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-084 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-082 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2217-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2217-046 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2207-021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2215-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M2201-081 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10M5-00 |
| filingDate | 1956-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1958-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-794387-A |
| titleOfInvention | Extreme pressure grease composition |
| abstract | A lubricating grease composition comprises a lubricating oil, an inorganic gelling agent and at least 2.5 per cent by weight, based on the whole composition, of an alkali metal hydrogen phosphate or an ammonium hydrogen phosphate. The gelling agent may be a clay (particularly a montmorillonite such as hectorite) or an amorphous colloid (e.g. silica, magnesia, alumina, silica-lime or silica-magnesia in aerogel form). The hydrogen phosphate may be sodium, potassium or ammonium mono- or di-hydrogen orthophosphate, sodium ammonium hydrogen orthophosphate, sodium hydrogen hypo- or pyro-phosphate or ammonium hypophosphate (NH4)2H2P2O6. The water-resistance of the grease may be improved by incorporating in the composition an anionic, cationic or non-ionic surface-active agent. Suitable cationic surface-active agents are aliphatic amines containing at least one alkyl group with 10 or more carbon atoms, the corresponding ammonium salts (e.g. octadecyl ammonium acetate, dimethyl dioctyl ammonium acetate, dimethyl didodecyl ammonium acetate, dimethyl hexadecyl octadecyl ammonium acetate and the corresponding chlorides) and condensation products of halohydrins with ammonia or amines or the partial amides of such condensation products. Reaction may take place between the clay and the amine salt to form an onium clay. The inclusion of a small amount of a strong acid (e.g. hydrochloric, sulphuric or phosphoric acid) in a clay-organic base combination improves the hydrophobic characteristics of the grease. Another method of improving the water-resistance of the grease is to react the gelling agent (especially silica) superficially with an aliphatic or cyclic alcohol. The grease composition may also contain antioxidants (e.g. arylamines such as phenyl alpha-or beta-naphthylamine) and extreme pressure agents. In examples, lubricating grease compositions are described consisting of mineral lubricating oil and (a) hectorite, partial tall oil acid amide of an epichlorohydrin-ammonia condensation product, phosphoric acid and sodium dihydrogen phosphate monohydrate, (b) onium clay (prepared by the reaction of dimethyl dicetyl ammonium chloride with bentonite) and NH4H2PO4; and (c) bentonite, partial oleic acid amide of an epichlorohydrin-ammonia condensation product and sodium dibasic pyrophosphate. In a further example, a lubricating grease composition is described consisting of bis (2-ethylhexyl) sebacate, silica aerogel and K2HPO4. For comparison purposes, grease compositions are described in which the sodium dihydrogen phosphate of composition (a) is omitted or replaced by trisodium phosphate, sodium metasilicate, boric acid, chlorinated naphthalene or a mixture of lard oil and lead naphthenate. |
| priorityDate | 1955-03-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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Total number of triples: 110.