Color layer composition for chromatic device and method of produ

Details Color layer composition for chromatic device and method of produ Color layer composition for chromatic device and method of produ

1998-07-18

1999-12-07

Wu, Shean C.

Compositions

Light transmission modifying compositions

Modification caused by energy other than light

252586, 359268, 359270, 359273, G02F 115, G02F 1155

Patent

active

059977760

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.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.

REFERENCES:
patent: 5252354 (1993-10-01), Cronin et al.
patent: 5352504 (1994-10-01), Boulanger et al.
patent: 5404244 (1995-04-01), Van Dine et al.
patent: 5442478 (1995-08-01), Lampert et al.
patent: 5457218 (1995-10-01), Cronin et al.
patent: 5524264 (1996-06-01), Cronin et al.
patent: 5851439 (1998-12-01), Inoue et al.

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