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METHOD OF PROTECTING POLYURETHANE RESINS FROM DEGRADATION BY ULTRA VIOLET RADIATION
METHOD OF PROTECTING POLYURETHANE RESINS FROM DEGRADATION BY ULTRA VIOLET RADIATION
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机译:紫外光辐射降解降解聚氨酯树脂的方法
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1477945 5 - Chloro - 2 - (21,41 - dihydroxyphenyl)benzotriazole SUMITOMO CHEMICAL CO Ltd 7 Feb 1975 [8 Feb 1974] 5396/75 Heading C2C [Also in Division C3] The compound of formula is prepared by the reduction of a nitroazo compound of formula e.g. using reducing metals such as Zn, Sn and Fe to an alkaline solution. 4 - Chloro - 2 - nitro - 21,41 - dihydroxyazobenzene is prepared by reaction of diazotized 4-chloro-2-nitroaniline and resorcinol.
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机译:1477945 5-氯-2-(21,41-二羟基苯基)苯并三唑SUMITOMO CHEMICAL CO Ltd 1975年2月7日[1974年2月8日] 5396/75标题C2C [也在C3司中]通过还原硝基偶氮化合物来制备下式的化合物式的化合物,例如使用还原性金属(例如Zn,Sn和Fe)制成碱性溶液。通过重氮化的4-氯-2-硝基苯胺与间苯二酚反应制备4-氯-2-硝基-21,41-二羟基偶氮苯。
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