http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-993047-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6fb5b4fbdc784282dead794bb7180742 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02E30-30 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21C3-17 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G21C3-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21C3-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G21C3-17 |
| filingDate | 1961-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-993047-A |
| titleOfInvention | Improvements in or relating to the polymerization of cyclic oxides and catalysts therefor |
| abstract | Cyclic oxides having at least one ring of two or three carbon atoms and one oxygen atom are polymerized with a catalyst which is a mixture or reaction product of (I) at least one compound of the formula R(AH)x, where A is sulphur, selenium or tellurium, with a valency of 2, R is H or an organic radical attached to A through a carbon atom, and x is 1 or 2, and (II) at least one compound of the formula BR1y where B is aluminium, beryllium, cadmium, gallium or zinc, R1 is hydrocarbon and y is the valency of B. The monomers may be mono- or poly-epoxides and may be unsaturated. Many examples are given. Many examples of catalysts are also given, including, as (I), compounds containing both sulphur and either selenium or tellurium. The catalyst and cocatalyst may be mixed or reacted by heating before adding to the monomer or may be added in any order. The formation of gels or cross-linking may be inhibited by the addition of nitro compounds or by excluding light, and anti-oxidants may also be added. The polymers, which have molecular weights of from about 50,000 to 500,000 and may be amorphous or crystalline, may be compounded with pigments, fillers, dyes, plasticizers, natural and synthetic rubbers, and other resins, many of which are specified. They may also be cured, particularly when containing unsaturation. The examples describe the polymerization of propylene oxide, alone and with allyl glycidyl ether, using ZnEt2 with H2S, ethane thiol, butane thiol, thiophenol and ethane-1,2-dithiol. Uses.-Fabrics, films, fibres, adhesives, tyres, shoe heels, raincoats, mats, moulded articles and plasticizers.ALSO:A catalyst for polymerizing epoxides (see Division C3) comprises a mixture or reaction product of (I) at least one compound of the formula R(AH)x where A is sulphur, selenium or tellurium and has a valency of 2, R is H or an organic radical attached to A through a carbon atom, and x is 1 or 2, and (II) at least one compound of the formula BR1y where B is aluminium, beryllium, cadmium, gallium or zinc, R1 is hydrocarbon and y is the valency of B. Many examples are given, including as (I) compounds containing both sulphur and either selenium or tellurium. The catalyst and cocatalyst may be mixed and heated together, or added in any order to the monomers. The examples describe the use of zinc diethyl with H2S, ethane thiol, butane thiol, thiophenol and ethane-1,2-dithiol. |
| priorityDate | 1960-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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