http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-718309-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fb78b459e21bb4fd52850a12cab27387 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-44 |
| filingDate | 1952-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1954-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-718309-A |
| titleOfInvention | Improvements in or relating to polymers of vinylanisole and preparation thereof |
| abstract | An opaque, infusible, proliferous anion-exchange copolymer is prepared by chloro- or bromoalkylating a proliferous copolymer of vinylanisole and a polyolefinic organic compound in which the olefinic linkages are in the aliphatic portion of the molecule, and reacting the product with a tertiary amine to give compounds having at least one substituent group of the general formula <FORM:0718309/IV (a)/1> in which n is 1 to 4, R1, R2, R3 are monovalent organic radicals and Y is an anion, for every fifteen aromatic nuclei in the copolymer. Polyolefinic compounds mentioned are divinyl benzene, isoprene, butadiene, bimethylallyl, biallyl, trivinylbenzene, dicyclopentadiene, dimethallyl ether and sulphide, vinyl allyl ether, diallyl maleate, and 2-chloroallyl crotonate. The proliferous copolymers may be prepared in bulk or by solution or suspension methods at from 50 DEG to 100 DEG C., preferably under an inert atmosphere, using catalysts such as benzoyl, lauroyl, stearoyl peroxides, t-butyl hydroperoxide and inorganic per-salts. The reaction mixture is preferably "seeded." The bromo- or chloro-alkyl groups are introduced by the usual methods and the copolymer is preferably swollen by liquids such as benzene, toluene, ethylene dichloride, and tri- and tetrachloroethanes before reaction with the amine, e.g. trimethylamine, triethylamine, dimethylbenzylamine, dimethylaminoethanol, dimethylaniline, tributylamine and N-methylmorpholine. The resins may be steam distilled and converted to quaternary ammonium hydroxides by treatment with aqueous solutions of alkali metal hydroxides. Examples describe the bulk copolymerization of vinylanisole with isoprene, butadiene, and a mixture of divinyl benzene and ethyl styrene; the chloromethylation with chloromethyl ether and an aluminium chloride catalyst of a vinylanisole-butadiene copolymer swollen in ethylenedichloride and the amination of the swollen product by dimethylamino ethanol or trimethylamine. The mixture is steam-distilled and filtered to yield a resin which may be used as the quaternary ammonium salt or the hydroxide. Specification 654,706 is referred to. |
| priorityDate | 1951-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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