Degreasing and dyeing hides and pelts - in a two phase system contg. water immiscible solvent and aq. dye soln.
Номер патента: DE2502563A1
Опубликовано: 29-07-1976
Автор(ы): Heinrich Singer, Max Dr Schwank, Peter Roehring
Принадлежит: Chemische Fabrik Pfersee GmbH
Опубликовано: 29-07-1976
Автор(ы): Heinrich Singer, Max Dr Schwank, Peter Roehring
Принадлежит: Chemische Fabrik Pfersee GmbH
Реферат: Process for degreasing, dyeing and opt. re-oiling of natural pelts and hides in a two-phase system comprises (1), treating the hide at 30-50 degrees C with a bath contg. a water-immiscible solvent and an emulsifier, using a wt/vol ratio of hides/water immiscible solvent of 1:3 to 1:30; (2) treating the material at 30-80 degrees C with a bath at pH 3-6 contg. a water-immiscible solvent, emulsifier, and a dye dissolved or dispersed in water, using a wt. ratio of material to be treated to water of >1:0.2, esp. 1:0.4-1.0 and a wt/vol ratio of material to water immiscible solvent of 1:3 to 1:30 and (3) treating the material at 20-80 degrees C with a bath contg. a water-immiscible solvent and water so that the bulk of the emulsified water in the bath is removed by azeotropic evaporation and subsequently the solvent is removed by centrifuging, drying in the usual way and finishing.
Process for dyeing synthetic fibre materials from an organic water-immiscible solvent
Номер патента: US4083685A. Автор: Winfried Kruckenberg. Владелец: Bayer AG. Дата публикации: 1978-04-11.