http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-765893-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-52 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-52 |
| filingDate | 1954-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-765893-A |
| titleOfInvention | Organic copolymers |
| abstract | Copolymers contain recurring intralinear units of the formul <FORM:0765893/IV(a)/1> and <FORM:0765893/IV(a)/2> wherein R, R11 and R111 are each a hydrogen atom, an alkyl radical of 1 to 3 carbon atoms, a phenyl or a cyclohexyl group, R1 is a saturated bivalent hydrocarbon radical of 2 to 6 carbon atoms, R2 and R3 are alkyl radicals of 1 to 3 carbon atoms and R1 is a saturated divalent hydrocarbon radical of 1 to 6 carbon atoms. The copolymers may be prepared by the copolymerization of at least one ethylenically unsaturated amide of the formula <FORM:0765893/IV(a)/3> and at least one ethylenically unsaturated amide of the formula <FORM:0765893/IV(a)/4> Lists of type I are provided, the preferred amides being N:2-methacrylamidoethyl-N:N-dimethyl - beta - aminopropionate betaine, N:3 - methacrylamidopropyl - N:N - dimethyl - beta - aminopropionate betaine, N:2-methacrylamidoethyl - N:N - dimethylaminoacetate betaine, N:3 - methacrylamidopropylN:N - dimethylaminoacetate betaine and N:3 - methacrylamidopropyl - N:N - dimethylaminopropionate betaine. Amides of type II specified are acrylamide, methacrylamide, N:N-dimethylacrylamide, N:N - diethylacrylamide, N - methyl - N - ethylacrylamide, and N-isopropyl and N-phenyl acrylamides and methacrylamides. Alternatively the copolymers may be prepared by copolymerizing amides of type II with compounds of the formula <FORM:0765893/IV(a)/5> wherein R5 may be alkyl of 1 to 4 carbon atoms, X- is Cl-, Br- or I- and the other symbols have the meanings assigned above, and then hydrolying the copolymers with alkaline agents to convert the ester groups to betaine groups. Carboethoxymethyl-2-methacrylamidoethyl dimethylammonium bromide and iodide, 1 - carboethoxyethyl - 2 - methacrylamidoethyl dimethylammonium bromide and the corresponding 1 - carbomethoxyethyl compound, and carboethoxymethyl - 3 - methacrylamidopropyl dimethyl ammonium iodide are representative of specified compounds of type III. Polymerization can be carried out in water or mixtures of water with water-miscible solvents, such as methanol, ethanol, propanol, isopropanol and tert.-butanol, and may be accelerated by heat, actinic light and/or a polymerization initiator such as benzoyl, acetyl and di-tert.-butyl peroxides, tert.-butyl and cumene hydroperoxides, hydrogen peroxide, sodium peroxide, sodium perborate and persulphate, ammonium persulphate-sodium bisulphite, hydrogen peroxide-thiourea, and potassium persulphate-ferrous sulphate; and azobis (isobutyronitrile), azobis(alpha, gamma-dimethylvaleronitrile, azobis (alpha, gamma, gamma-trimethylvaleronitrile), azobis (alpha-methyl-butyronitrile and azobis (isobutyramidine hydrochloride). The copolymers are used in the manufacture of photographic layers. Specifications 535,341, [Group IV], and 757,285 are referred to. |
| priorityDate | 1954-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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