Compositions – Electrically conductive or emissive compositions – Light sensitive
Patent
1990-04-24
1995-01-17
Green, Anthony
Compositions
Electrically conductive or emissive compositions
Light sensitive
252500, 252518, 252519, 252520, 252521, 1062871, 10628716, 10628717, 10628718, 10628719, 1062872, 10628723, 10628729, 556 40, H01B 100, H01B 124
Patent
active
053823834
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to coating solutions (coating liquids) for forming transparent conductive ceramic coatings and process for preparing the same. The invention also relates to substrates coated with transparent conductive ceramic coatings, process for preparing the same and uses thereof. More particularly, the invention relates to coating solutions capable of forming continuously at low temperatures such as about 120.degree. C. conductive ceramic coatings which are extremely transparent, excellent in adhesion to the surface of substrates such as glass, plastic and the like materials, high in durability such as alkali resistance, acid resistance and resistance to saline solutions, and in resistance to scuffing.
The invention further relates to substrates coated with transparent conductive ceramic coatings formed by using the above-mentioned coating solutions for forming transparent conductive ceramic coatings, and to processes for preparing the same. Furthermore, the invention relates to displaying devices equipped with the above-mentioned substrates coated with transparent conductive ceramic coatings as face-plates and copy machines equipped with the above-mentioned substrates coated with transparent conductive ceramic coatings as platen glass.
BACKGROUND OF THE INVENTION
Glass or plastic substrates are transparent and have a wide variety of uses. However, these substrates are liable to generate static electricity on their surface, because they are insulators. When glass or plastic substrates are used, as they are, as face-plates for displaying devices such as cathode ray tube (CRT), fluorescent indication pipe (FIP), plasma display (PDP), liquid crystal display (LCD), etc., rubbish or dust attaches to the surface of face-plates and the images displayed are difficult to look at. In the case of LCD, moreover, there is sometimes brought about destruction of IC or mistake in display by static electricity generated. In a copy machine 1 equipped with an automatic document feeder (ADF) 2 as shown in FIG. 1, paper clogging is sometimes caused by static electricity generated on a platen glass 3 in the course of feeding documents, whereby continuous feeding of the documents can be made no longer. In the case of plastic substrates, moreover, because of their low surface hardness, the plastic substrates readily receive scuff marks, whereby they sometimes decrease in transparency.
With the view of solving such problems as mentioned above, there are proposed processes for forming on substrates metallic coatings or conductive inorganic oxide coatings by the vapor phase method such as CVD, PVD or sputtering. The coatings obtained by these processes, however, are low in acid resistance as well as in alkali resistance, and liable to scuffing as they are low in resistance to scuffing, though they are excellent in transparency or conductivity. In forming these substrates, it is necessary to use vacuum metallizers and, moreover, there is a limit to an area or shape of the substrate on which the coating can be formed by the vacuum metallizers. Furthermore, in these processes no coatings are formed at low temperatures, and continuous productivity is poor because said processes are carried out batchwise.
In the platen glass coated with such an antistatic coating as mentioned above, the coating formed on the platen glass was sometimes scraped off by the documents fed to ADF or a rubber belt fitted to ADF. When copying is carried out in higher copy sensitivity, that is, at a gray scale, by using a copy machine with such a platen glass as mentioned above, there was brought about such a new problem that the scraped portion are printed as stains on the copy.
There is also proposed a process for imparting conductivity to substrates by coating the substrates with conductive paints prepared by dispersing conductive substances in resin. The coatings obtained by this process, however, had such problems that they are poor in transparency, durability and resistance to scuffing, though they are excellent in con
REFERENCES:
patent: 5013607 (1991-05-01), Sato et al.
Patent Abstracts of Japan, vol. 12, No. 172, (C-497) (3019) May 21, 1988.
Abe Yoneji
Hirai Toshiharu
Komatsu Michio
Asahi Glass Company
Catalysts & Chemicals Industries Co. Ltd.
Green Anthony
LandOfFree
Coating solutions for forming transparent conductive ceramic coa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coating solutions for forming transparent conductive ceramic coa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coating solutions for forming transparent conductive ceramic coa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-745714