Ionic polyesters, electrically photosensitive composite particles and materials containing the polyesters and photoelectrophoretic imaging methods
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0064007A1
公开(公告)日:1982-11-03
Novel polyesters comprise repeating units from:
(a) a diacid derived component comprising an alkali metal or ammonium-sulfoarylene, -sulfoaryloxyarylene, -sulfocycloalkylene, -iminodi-sulfonylarylene, -iminobis-(sulfonylarylene) or -sulfoarylkylarylene; and
(b) a diol or diacid derived component comprising bis (N-alkyl-N-alkyleneaminoaryl)-arylalkane; bis (N-alkyl-N-alkyleneaminoaryl)-diarylalkane; bis (N-alkyl-N-alkylene- aminoaryl)-isoalkane; bis (N-alkyl-N-alkylenenaminoaryl)-cycloalkane; dialkyleneaminotetraarylalkane; or bis (alky- lenearyl)arylamine.
The polyesters are useful to prepare electrically photosensitive composite particles and electrically photosensitive materials containing an electrically insulating binder and the composite particles. The particles or materials can be used in a photoelectrophoretic migration imaging process which consists in placing them between two electrodes and submitting them to activating radiation and an electrical field for obtaining an image.
Triarylmethane compounds used as antioxidants in overcoat layers to alleviate printing defects and an improved chemical process for the synthesis of these triarylmethane compounds using an acetal derivative of an aldehyde which significantly reduces reaction time and results with the formation of substantially no byproducts.