摘要:
A direct positive silver halide photographic light-sensitive material is described, comprising a support having coated thereon a light-sensitive silver halide photographic emulsion layer and a hydrophilic colloid layer, at least one of said layers containing a compound represented by the formula (I): ##STR1## wherein R.sup.1 represents R.sup.6 or R.sup.6 CO--; and R.sup.6 represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or hydrogen; R.sup.2 and R.sup.4, which may be the same or different, each represents an aliphatic group, an aromatic group, a heterocyclic aromatic group or a hydrogen atom; or R.sup.1 and R.sup.2 together can form a ring; R.sup.3 represents hydrogen or an aliphatic group; R.sup.5 represents Y or X--A--Y wherein X and Y, which may be the same or different, each represents a divalent aromatic group; and A represents a divalent group selected from --CONH--, --NHCONH--, --SO.sub.2 NH--, --B--CONH-- and --B--SO.sub.2 NH-- wherein B represents --E--, --O--E-- or --S--E-- wherein O and S is bonded to X; and E represents a divalent aliphatic group; the compound represented by formula (I) is a fogging agent which imparts a desired fogging activity without detracting from spectral sensitization.
摘要翻译:描述了直接正性卤化银照相感光材料,其包括其上涂覆有感光卤化银照相乳剂层和亲水胶体层的载体,所述层中的至少一层含有由式(I)表示的化合物, (I)其中R1表示R6或R6CO-; R 6表示脂肪族基团,芳香族基团,杂环芳香族基团或氢原子; R 2和R 4可以相同或不同,表示脂族基团,芳族基团,杂环芳族基团或氢原子; 或者R 1和R 2一起形成环; R3表示氢或脂族基; R5表示Y或X-A-Y,其中X和Y可以相同或不同,表示二价芳族基团; 并且A表示选自-CONH - , - NHCONH-, - SO 2 NH - , - CON-CONH和-B-SO 2 NH-的二价基团,其中B表示-E-,-OE-或-SE-,其中O和S为 与X键合; E表示二价脂族基; 由式(I)表示的化合物是赋予所需起雾活性而不降低光谱增感作用的起雾剂。
摘要:
Secondary-aliphatic .alpha.-substituted azoalkanes, such as 1-isopropylazo-1-azidocyclohexane, and processes using such azoalkanes as polymerization initiators for vinyl monomers and as curing agents for resins.
摘要:
Secondary-aliphatic .alpha.-substituted azoalkanes of the formula ##STR1## where n is 1 or 2, R' and R" are hydrocarbo, R.sub.1 and R.sub.2 are hydrocarbo or heterocyclic or joined to form a cyclic hydrocarbon group and X is selected from Cl, Br, CN, OH, N.sub.3, SCN and from radicals containing carbon and oxygen, nitrogen or sulfur, for example, 1-isopropylazo-1-azidocyclohexane, and 2-isopropylazo-2-(methoxycarbonyloxy)butane. These azoalkanes are useful as polymerization initiators for vinyl monomers and as curing agents for resins.