http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1430782-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8fc0668fd5cbfe23cea7d9bdd5de932a http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_95a226ec4ea362dc6021d03a6730a841 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F26-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J43-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F26-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F26-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J43-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22 |
| filingDate | 1973-05-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1430782-A |
| titleOfInvention | Process for manufacutring amphoteric ion exchange resins |
| abstract | 1430782 Preparing ion-exchange resins ICI AUSTRALIA Ltd and COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANIZATION 30 May 1973 [31 May 1972] 25753/73 Heading C3P Amphoteric ion-exchange resins are prepared by a process comprising (a) polymerizing a mixture containing an ethylenically unsaturated monomer having an amine or imine group, or a non-charged or negatively charged derivative thereof, and an ethylenically unsaturated monomer containing an acidic group, or a non- charged or positively charged derivative thereof, provided that monomer derivatives of opposite charge are not used and that at least one of the monomers is in the derivative form and (b) subjecting the polymer product obtained to an unblocking reaction to release the basic and/or acidic groups from the derivative or derivatives. The ion-exchange materials have thermally regenerable capacity. Step (a) may be effected in bulk or in an organic solvent in which all the monomers are soluble, e.g. acetone, dimethylformamide, acetonitrile, dimethyl sulphoxide, methyl ethyl ketone and C 1 -C 6 alkanols, the monomer solution being, if desired, dispersed in an immiscible supporting medium. Polymerization may be effected with a chemical initiator and/or high energy radiation. The monomer mixture used may optionally also include a neutral monomer, e.g. vinyl acetate, methyl vinyl ether or styrene, or a cross-linking monomer, e.g. a dimethacrylate, divinylbenzene or a triallyl compound. In examples the resins are obtained by polymerization of methyl acrylate or (meth)acrylamide with triallylamine hydrochloride, 1,4 bis - (diallylaminomethyl)-benzene dihydrochloride or 1,6-bis- (diallylamino) hexane dihydrochloride, and optionally vinyl acetate, ethylene glycol dimethacrylate, methyl diallylamine hydrochloride or divinylbenzene, and the product is hydrolysed with sodium hydroxide to convert the ester or amide groups to sodium carboxylate groups; and by polymerization of dimethylaminoethyl methacrylate with triallylamine hydrochloride wherein the product is hydrolysed with hydriodic acid to convert the amino-ester groups to carboxylic acid groups. |
| priorityDate | 1972-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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