http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1256743-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F289-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F289-00 |
| filingDate | 1969-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1971-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1256743-A |
| abstract | 1,256,743. Polymerization process. GILLETTE CO. 7 Jan., 1969 [11 Jan., 1968], No. 976/69. Heading C3G. An ethylenically unsaturated monomer is polymerized within a protein product in the form of a particle, film or fibre, by maintaining the product in contact with an aqueous medium at a pH of 1 to 1À4 containing a water-soluble persulphate initiator for at least 15 minutes, then introducing into said medium in a concentration of 0À002 to 0À2 molar a mercaptocarboxylic acid which is soluble in water to the extent of at least 0À01% by weight at 20‹ C., said monomer being present in the medium containing the initiator, or being added together with the acid, or after the acid is added. In a modification, the aqueous medium also contains, as oxygen scavenger, tris-(hydroxymethyl) phosphine, an acid salt thereof or a tetra-substituted phosphonium salt, e.g. a tetrakis (hydroxymethyl) phosphonium salt and the pH of the medium is from 1 to 3. Specified mercaptocarboxylic acids are thioglycolic, thiolactic and thiosalicylic acids. In Examples 1 and 2, acrylonitrile is polymerized in an aqueous medium initially containing wool top, H 2 SO 4 and ammonium persulphate, thioglycolic acid being added later. Tetrakis (hydroxymethyl) phosphonium chloride is also present in the aqueous medium used in Example 3. In Example 4, the wool top of Example 3 is replaced by silk fibres, regenerated casein fibres, casein powder or gelatine film and in Example 5 the acrylonitrile of Example 3 is replaced by methacrylic acid, methyl acrylate or styrene. |
| priorityDate | 1968-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.