申请人:E. I. Du Pont de Nemours and Company
公开号:US05409809A1
公开(公告)日:1995-04-25
An improved stabilizer is provided with decreased fog and minimal loss of photographic speed. The stabilizers are represented by A-(Y).sub.n -B wherein; n is 0 or 1; Y is --S--, --CH.sub.2 S--, or 2,6 disubstituted pyridine with the proviso that when Y is --CH.sub.2 S-- the substituent A is attached to the sulfur; when Y is --S-- or --CH.sub.2 S-- A is pyrimidine, tetrazole, benzoxazole, benzimidazole, benzothiazole, benzoselenazole, naphthoxazole, or ##STR1## B and E separately are phenyl substituted with at least one electron accepting group or pyridine substituted with at least one electron accepting group with the proviso that when Y is --S--CH.sub.2 -- A is not tetrazole when B is phenyl; when Y is 2,6 disubstituted pyridine A represents hydrogen, benzoxazole, benzimidazole, benzothiazole, benzselenazole, naphthoxazole; B represents benzoxazole, benzimidazole, benzothiazole, benzselenazole, naphthoxazole and with the provisio that when Y is S, A-(Y).sub.n -B is limited to specific components.
提供了一种改进的稳定剂,具有减少雾度和最小化照片速度损失的效果。该稳定剂由A-(Y).sub.n -B表示,其中;n为0或1;Y为--S--、--CH.sub.2 S--或2,6-二取代吡啶,但当Y为--CH.sub.2 S--时,取代基A附着在硫上;当Y为--S--或--CH.sub.2 S--时,A为嘧啶、四唑、苯并噁唑、苯并咪唑、苯并噻唑、苯并硒唑、萘并噁唑或##STR1##,B和E分别为芳基,其上至少有一个电子受体基团或取代有至少一个电子受体基团的吡啶,但当Y为--S--CH.sub.2 --时,当B为苯基时,A不是四唑;当Y为2,6-二取代吡啶时,A代表氢、苯并噁唑、苯并咪唑、苯并噻唑、苯并硒唑、萘并噁唑;B代表苯并噁唑、苯并咪唑、苯并噻唑、苯并硒唑、萘并噁唑,但当Y为S时,A-(Y).sub.n -B仅限于特定的组分。