http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-568884-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28a660c95866e78384d66dc23f57146f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-30 |
| filingDate | 1942-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1945-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-568884-A |
| titleOfInvention | Improvements in or relating to emulsion polymerization processes |
| abstract | Aqueous emulsions are made by heating under reflux in the presence of a peroxide catalyst a water-insoluble vinyl or acrylic ester, e.g. vinyl acetate and methyl acrylate, in aqueous emulsion containing a surface tension depressant and at least two hydrophilic colloids (total amount not exceeding 12 per cent by weight of the total charge), at least 0.1 per cent of each colloid being present. The colloids may be methyl or benzyl cellulose, gums arabic, tragacanth or acacia, agar agar, gelatine, starch or partially hydrolysed polyvinyl acetate. The surface tension depressant specified is the sodium salt of the sulphonic acid of dioctyl succinic ester. Suitable catalysts are hydrogen, acetyl and benzoyl peroxides. Polymerization accelerators such as those described in Specification 568,886 may be used. Plasticizers and colouring agents may be added before or after emulsification. Examples describe the use of (1) methyl cellulose and gum tragacanth; (2) methyl cellulose and starch; (3) hydrolysed polyvinyl acetate of 10 per cent and 40 per cent acetate group contents; (4) hydrolysed polyvinyl acetate and gum tragacanth; (5) hydrolysed polyvinyl acetate and methyl cellulose; (7) methyl cellulose and gum arabic. The products may be used in making films, for coating or impregnating cloth, paper and cardboard, as vehicles for pigments, e.g. carbon black, metal powders and dyes in coating compositions, as adhesives and chewing gum base. Specification 475,162 also is referred to. |
| priorityDate | 1942-04-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.