Transfer material e.g. carbon paper - comprises substrate carrying compsn. contg. Lewis acid, dye precursor deriv., surfactant and binder
Опубликовано: 20-09-1979
Автор(ы): Ilona Witz
Принадлежит: Kores Holding Zug AG
Реферат: A transfer material consists of (a) a substrate and (b) a transfer layer contg. (1) a Lewis acid, (2) a deriv. of a dye precursor, and (3) a surfactant, embedded in (4) a binder. The material is used as, e.g., a typewriter ribbon, carbon paper, or a coloured sheet for a duplicating machine. A quantitative reaction between the dye precursor and the metal chloride occurs immediately, giving max. colour intensity. Errors can be corrected and re-typed without fading. The substrate may be paper, a textile, or a synthetic material. The Lewis acid is pref. ZnCl2. Claimed precursors include crystal violet lactone, malachite green lactone, benzoyl leucomethylene blue, rhodamine-B lactam, leucoauramine, spiropyran and fluoran. Anionic surfactants, e.g. alkyl or alkaryl soaps, are claimed. Binders are partic. natural wax, carnauba wax, resin wax, ozokerite, polyethylene wax, paraffin was and oxide wax.
Installation for feeding a plurality of loads, e.g. cells of aluminium melting furnaces, with bulk materials, e.g. pulverised aluminium oxide
Номер патента: CA2414430C. Автор: Klaus Von Geldern,Volkmar Irmscher,Heino Sorger. Владелец: Moeller Materials Handling GmbH. Дата публикации: 2007-01-23.