公开(公告)号：US3762926A

公开(公告)日：1973-10-02

申请号：US3762926D

申请日：1971-01-05

Applicant: AGFA GEVAERT AG

Inventor： HIMMELMANN W ,  ROOS E ,  SOBEL J

IPC: C07C45/27 ,  C07C45/42 ,  C07C45/43 ,  C07C45/51 ,  C07C45/67 ,  C07C45/71 ,  C07C47/55 ,  C07C47/565 ,  C07C47/575 ,  G03C1/30

CPC classification number: G03C1/301 ,  C07C45/27 ,  C07C45/42 ,  C07C45/43 ,  C07C45/515 ,  C07C45/673 ,  C07C45/71 ,  C07C47/55 ,  C07C47/565 ,  C07C47/575

Abstract: Trimesic aldehydes, which are substituted in the 2-,4- and 6position with chlorine, hydroxy or methoxy, as well as hexamethyl acetals and bisulfite addition products of such aldehydes are useful for hardening gelatin layers especially photographic gelatin layers. The hardening effect is developed by rendering alkaline the gelatin that contains any of these aldehydes.

公开(公告)号：US3794493A

公开(公告)日：1974-02-26

申请号：US3794493D

申请日：1971-06-17

Applicant: AGFA GEVAERT AG

Inventor： SOBEL J ,  NITTEL F ,  PELZ W ,  HIMMELMANN W

IPC: C07D249/20 ,  C08K5/3475 ,  C09K15/30 ,  D06M13/35 ,  G03C1/84

CPC classification number: C07D249/20 ,  C08K5/3475 ,  C09K15/30 ,  D06M13/35

Abstract: THE LIGHT STABILITY OF COLOR PHOTOGRAPHIC IMAGES IS IMPROVED BY COVERCOATING THE IMAGE CARRYING LAYER WITH A UVPROTECTIVE COATING WHICH CONTAINS A UV-ABSORBING COMPOUND. THE UV-ABSORBING LAYER CONTAINS AS UV-ABSORBENT A 2-PHENOLBENZOTRIAZOLE, THE BENZO RING OF WHICH IS SUBSTITUTED WITH 2 BUTYL GROUPS.

公开(公告)号：US3754919A

公开(公告)日：1973-08-28

申请号：US3754919D

申请日：1971-12-21

Applicant: AGFA GEVAERT AG

Inventor： SOBEL J ,  NITTEL F ,  HIMMELMANN W ,  PELZ W

IPC: C07D249/20 ,  G03C1/815 ,  G03C1/84

CPC classification number: C07D249/20 ,  G03C1/8155

Abstract: The light stability of color photographic images is improved by overcoating the image carrying layer with a UV-protective coating which contains a UV-absorbing compound. The UV-absorbing layer contains as UV-absorbent a 2-phenolbenzotriazole, the benzo ring of which is substituted with at least 1 alkoxy group.