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公开(公告)号:US4039527A
公开(公告)日:1977-08-02
申请号:US513846
申请日:1974-10-10
IPC分类号: C07C255/65 , C08F4/04 , C09B62/006 , C07C107/02
CPC分类号: C09B62/0061 , C07C255/65
摘要: Unsymmetrical azonitriles of the formula, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are independently straight- or branched-chain alkyl having 1 to 7 carbon atoms or alkoxy substituted straight- or branched-chain alkyl having 2 to 11 carbon atoms but at least one of R.sup.1 and R.sup.2 and at least one of R.sup.3 and R.sup.4 must be different, have good efficiency as initiator for polymerizations or copolymerizations of vinyl monomers. These unsymmetrical azonitriles can be prepared by oxidizing a corresponding unsymmetrical hydrazo compound.
摘要翻译: 其中R1,R2,R3和R4独立地是具有1至7个碳原子的直链或支链烷基或具有2至11个碳原子的烷氧基取代的直链或支链烷基,但在 R 1和R 2中的至少一个以及R 3和R 4中的至少一个必须不同,作为乙烯基单体的聚合或共聚的引发剂具有良好的效率。 可以通过氧化相应的不对称羟基化合物来制备这些不对称的氮杂芳族化合物。
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公开(公告)号:US4266018A
公开(公告)日:1981-05-05
申请号:US78622
申请日:1979-09-25
申请人: Shoji Ishiguro , Tadao Shishido , Takeo Sakai , Noboru Sasaki , Joji Nagaoka , Minoru Matsuki
发明人: Shoji Ishiguro , Tadao Shishido , Takeo Sakai , Noboru Sasaki , Joji Nagaoka , Minoru Matsuki
CPC分类号: G03C1/09
摘要: A silver halide photographic emulsion chemically sensitized by a sulfur compound of the formula: ##STR1## wherein R.sub.1 represents a 5-membered or 6-membered heterocyclic ring containing a nitrogen atom; R.sub.2 represents a hydrogen atom, a lower alkyl group, an allyl group, an aryl group, or an aralkyl group; and R.sub.3 has the same definition as R.sub.1 or R.sub.2 ; or R.sub.2 and R.sub.3 may join to form a heterocyclic ring; is disclosed.
摘要翻译: 由下式的硫化合物化学致敏的卤化银照相乳剂:其中R 1表示含有氮原子的5元或6元杂环; R2表示氢原子,低级烷基,烯丙基,芳基或芳烷基; R3与R1或R2具有相同的定义; 或者R 2和R 3可以连接形成杂环; 被披露。
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