NAPHTHOBISCHALCOGENADIAZOLE DERIVATIVE AND PRODUCTION METHOD THEREFOR
申请人:OSAKA UNIVERSITY
公开号:US20190337966A1
公开(公告)日:2019-11-07
In order to provide a naphthobischalcogenadiazole derivative that can be used as an intermediate for producing a naphthobischalcogenadiazole compound into which a fluorine atom has been introduced, the naphthobischalcogenadiazole derivative in accordance with an aspect of the present invention is represented by a formula (I):
where each of A
1
and A
2
is independently an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom; and each of X
1
and X
2
is independently a hydrogen atom, a halogen atom, a boronic acid group, a boronic acid ester group, a boronic acid diaminonaphthalene amide group, an N-methyliminodiacetic acid boronate group, a trifluoroborate salt group, or a triolborate salt group.
Polycarbonatgemische mit verbesserter Flammwidrigkeit
申请人:Mobay Chemical Corporation
公开号:EP0001096A2
公开(公告)日:1979-03-21
Die Erfindung betrifft ein halogenhaltiges Copolycarbonatgemisch. das verbesserte kritische Dicke und verbesserts Flammwidrigkeit und Feuerwiderstandsfähigkeit aufweist und das Reaktionsprodukt eines aromatischen Diphenols, eines aromatischen Thiodiphenols und eines Kohlensäurederivats wie Phosgen oder Carbonylbromid in Mischung mit einer wirksamen Menge einer halogenhaltigen Verbindung enthält. Bei einer bevorzugten Ausführungsform enthält das Copolycarbonatgemisch außerdem geringe Mengen wines Perfluorsulfonsäure- oder -carbonsäuresalzes.
This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated π bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.
Naphthobischalcogenadiazole derivative and production method therefor
申请人:OSAKA UNIVERSITY
公开号:US10793584B2
公开(公告)日:2020-10-06
In order to provide a naphthobischalcogenadiazole derivative that can be used as an intermediate for producing a naphthobischalcogenadiazole compound into which a fluorine atom has been introduced, the naphthobischalcogenadiazole derivative in accordance with an aspect of the present invention is represented by a formula (I):
where each of A1 and A2 is independently an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom; and each of X1 and X2 is independently a hydrogen atom, a halogen atom, a boronic acid group, a boronic acid ester group, a boronic acid diaminonaphthalene amide group, an N-methyliminodiacetic acid boronate group, a trifluoroborate salt group, or a triolborate salt group.