http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-735715-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af7c9c966acd2ef7eca105d82d8d0991 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F271-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F36-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F271-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22 |
| filingDate | 1952-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1955-08-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-735715-A |
| titleOfInvention | Improvements in or relating to polymer compositions and methods for producting the same |
| abstract | In emulsion polymerization in an acid medium a salt of a polymer of a vinyl pyridine having the formula <FORM:0735715/IV (a)/1> in which R is hydrogen, alkyl, vinyl or a -methyl vinyl groups, at least one and not more than two of the R's being vinyl or a -methyl vinyl and the total number of carbon atoms in the alkyl groups not exceeding 12, used as an emulsifying agent. A base may be added to coagulate the polymer and precipitate the polyvinyl pyridine, so that a homogenous blend of the two polymers is obtained. Specified pyridine derivatives are 2-vinyl, 2,5-divinyl, 2-methyl-5-vinyl, 2,3,4-trimethyl-5-vinyl, 3,4,5,6-tetramethyl-2-vinyl, 3-ethyl-5-vinyl, 2,6-diethyl-4-vinyl, 2-isopropyl-4-nonyl-5-vinyl, 2-methyl-5-undecyl-3-vinyl, 3-dodecyl-4,5-divinyl, 2,4-dimethyl-5,6-dipentyl-3-vinyl, 2-decyl-5-(a -methylvinyl), 3,5-di-(a -methylvinyl) pyridines. The salts may be those of sulphuric, hydrochloric, nitric, phosphoric, formic, acetic, propionic, butyric, oxalic, malonic, succinic, glycollic, chloracetic, dichloracetic and trichloracetic acids. Suitable monomers are styrene, a -methyl-styrene, alkyl-styrenes, acrylo-and methacrylonitriles, methyl and ethyl acrylates, methyl methacrylate, vinyl chloride, vinylidene chloride, mixtures thereof and with conjugated diolefins such as 1,3-butadiene. Suitable catalysts are persulphates alone or in conjunction with bisulphites, iron pyrophosphates or sugars. Examples describe the emulsion polymerization (1) of 2-vinyl and 2-methyl-5-vinylpyridines using potassium persulphate, soap flakes and a mixture of C12, C14 and C16 mercaptans, coagulation with sulphuric acid, conversion of the fatty acid formed to soap by addition of a base, and purification by solution in isopropyl alcohol followed by precipitation with water; the polymer, 50 per cent neutralized with sulphuric acid, being used to polymerize styrene in aqueous emulsion containing potassium persulphates, sodium bisulphite and a mercaptan blend; (2) acrylonitrile using poly-2-vinyl pyridinium sulphate; (3) acrylonitrile and acrylonitrile-butadiene mixtures using poly-2-vinyl pyridinium acetate; (4) vinyl chloride and a vinyl chloride-acrylonitrile mixture using poly-2-vinylpyridinium chloride. |
| priorityDate | 1951-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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