http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-769823-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0235f5aeeff44e5b1733138b721f5c06 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-3477 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-11 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-3477 |
| filingDate | 1955-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1957-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-769823-A |
| titleOfInvention | Improvements in rubber treatment |
| abstract | A vulcanizate of low torsional hysteresis and high electrical resistivity is prepared by mixing synthetic rubber with a large amount of carbon black and with a small quantity of an aliphatic compound having two atoms of either chlorine or bromine on an aliphatic carbon atom adjacent to two carbonyl groups, heating the mixture at a temperature of at least 275 DEG F. but below the temperature at which the rubber would be harmed by thermal decomposition, masticating the mixture during and/or after the heat treatment or alternately therewith, incorporating vulcanizing and other ingredients, shaping, and vulcanizing. The aliphatic compound may be dichloromalonic acid, ethyl dichloromalonate, a ,a - dichloromalonamide, a ,a - dichloromalonyl urea, ethyl chlorobromomalonate, a ,a -dibromomalonyl urea, ethyl dibromomalonate, or a ,a -dibromomalonamide. The synthetic rubber may comprise a polymer of a conjugated diolefin, e.g. butadiene or isoprene, or a copolymer thereof with a mono-olefin, e.g. isobutylene, styrene, a -methyl styrene, methyl or ethyl acrylate, methyl methacrylate, acrylonitrile, methacrylonitrile, methyl vinyl ketone, methyl isopropenyl ketone, or a mono-vinyl pyridine. Preferably 1 to 5 parts by weight of aliphatic compound and 40 to 100 parts of carbon black are mixed with 100 parts of synthetic rubber, and the mastication is effected at a temperature between 275 DEG and 400 DEG F. on a mill or in an internal mixer. U.S.A. Specification 2,118,601 is referred to.ALSO:A vulcanizate of low torsional hysteresis and high electrical resistivity is prepared by mixing natural or synthetic rubber with a large amount of carbon black and with a small quantity of an aliphatic compound having two atoms of either chlorine or bromine on an aliphatic carbon atom adjacent to two carbonyl groups, heating the mixture at a temperature of at least 275 DEG F. but below the temperature at which the rubber would be harmed by thermal decomposition, masticating the mixture during and/or after the heat treatment or alternately therewith, incorporating vulcanizing and other ingredients, shaping and vulcanizing. The aliphatic compound may comprise dichloromalonic acid, ethyl dichloromalonate, a -, a -dichloromalonamide, a , a -dichloromalonyl urea, ethyl chlorobromomalonate, a , a -dibromomalonyl urea, ethyl dibromomalonate, or a , a dibromomalonamide. The synthetic rubber may comprise a polymer of a conjugated diolefin, e.g. butadiene or isoprene, or a copolymer thereof with a mono-olefin, e.g. isobutylene, styrene, a -methyl styrene, methyl or ethyl acrylate, methyl methacrylate, acrylonitrile, methacrylonitrile, methyl vinyl ketone, methyl isopropenyl ketone, or a mono-vinyl-pyridine. Preferably 1 to 5 parts by weight of aliphatic compound and 40 to 100 parts of carbon black are mixed with 100 parts natural or synthetic rubber, and the mastication is effected at a temperature between 275 DEG and 400 DEG F. on a mill or in an internal mixer. In examples vulcanizates are prepared using (1) 100 parts Hevea rubber, 50 parts carbon black, 5 parts stearic acid, 2 parts a , a dichloromalonyl urea or 3,2 parts ethyl dibromomalonate, (2) 100 parts butadienestyrene copolymer, 55 parts carbon black, 2 parts a , a -dichloromalonyl urea or 3,2 parts ethyl dibromomalonate or 2,9 parts a , a dibromomalonyl area, (3)) 100 parts butadienestyrene copolymer, 52 parts carbon black, 6 parts hydrocarbon softener, 1 part stearic acid, 2,5 parts ethyl dibromomalonate, (4) 100 parts isobutylene-isoprene copolymer, 50 parts carbon black, 1,5 parts ethyl dibromomalonate, vulcanizing and other ingredients being added to each heat treated mixture. U.S.A. Specification 2,118,601 is referred to. |
| priorityDate | 1954-08-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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