Coloring layer composition for chromatic device and method of pr

Details Coloring layer composition for chromatic device and method of pr Coloring layer composition for chromatic device and method of pr

1996-05-16

1998-12-22

Yamnitzky, Marie

Compositions

Light transmission modifying compositions

Displaying color change

252583, 359265, 423582, 423606, G02F 115

Patent

active

058514392

ABSTRACT:
A coloring layer composition for a chromatic device of the present invention contains an oxide such as tungsten oxide or niobium oxide and so on as a solute, water and an organic solvent such as propanol. In the step of forming a reduction coloring layer, a film is formed by using a peroxotungstic acid solution containing 100 parts by weight of WO.sub.3.aNb.sub.2 O.sub.5.bH.sub.2 O.sub.2 .andgate.cH.sub.2 O (wherein a, b and c are each a positive number) as a solute, 20 to 120 parts by weight of water and 80 to 800 parts by weight of n-propanol as an organic solvent. At this time, a dip coating method is used, and the vertical pulling-up speed is less than 15 cm/min. The present invention can effectively prevent unevenness and separation of the reduction coloring layer.

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Lehrbuch der Analytischen und Preparativen Anorganischen Chemie, p. 222, (Hirzel Verlag, Stuttgart) 1973.

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