Coating processes – Optical element produced – Polarizer – windshield – optical fiber – projection screen – or...
Reexamination Certificate
2000-09-06
2003-03-11
Dawson, Robert (Department: 1712)
Coating processes
Optical element produced
Polarizer, windshield, optical fiber, projection screen, or...
C427S164000, C522S006000, C522S179000, C522S180000, C428S423100, C428S423300, C428S425500, C428S425900, C428S3550RA
Reexamination Certificate
active
06531180
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to;
an ultraviolet (UV)-curable composition for forming a coating of electronic materials, such as a surface protective layer of semiconductors, an insulating layer of semiconductor-mounted devices, a surface protective coating of color filters in liquid crystal display devices, an insulating interlayer of multilayered printed circuits and a protective coating of light guiding materials or phase shifting materials,
a glass having both of the scattering-preventing properties and the anti-reflective properties, which is useful for display devices, construction materials, lenses, automobile parts, furniture and others,
an adhesive agent which shows only a little aging under a high temperature and high humidity conditions, and shows an excellent adhesion property with optical films,
a shock-absorbing material, such as plate glass, glass articles, potteries and others, which can protect fragile articles liable to be damaged during transportation or storage,
an easily removable ultraviolet (UV)-cutting sheet fixed onto a surface of glass, which is exposed to sunlight in various architectural structures, such as housing, buildings, traffic systems, vending machines, oceanic constructions,
a easily removable UV-screening filter fixed onto a display surface of televisions,
a filter for a shield for electromagnetic waves, and for shielding UV rays and preventing electrostatic charging in VDTs (visual display terminals) such as personal computers, word processors and other devices, and
a transparent resin having a high adhesion property capable of constituting a high refractive index primer composition for plastic lenses.
PRIOR ART
Recently, a variety of color liquid crystal display devices comprising a combination of a liquid crystal device and a color filter for color separation have become widely used. The color filter is generally constituted by a glass substrate, picture elements formed on the substrate, a layer of protective coating, and a transparent electrode of indium-tin oxide (ITO), in this order from the substrate. For the layer of protective coating, it is necessary to satisfy a wide range of properties such as;
an adhesion property to picture elements, glass, chromium used as a black matrix component, which constitute a lower layer of the device,
an adhesion property to ITO constituting an upper layer,
an adhesion property to an epoxy sealing agent constituting a liquid crystal cell,
capabilities of shielding impurities of the picture elements, of smoothness, of wet heat resistance, of light fastness, of resistance to solvents, of chemical resistance, of dampness, of transparency,
a capability of heat resistance required in the posterior-processing in the production of liquid crystal cells, and the like.
Further, similar properties are required for a protective coating of the glass substrate. For materials for forming the protective coating, a heat curable composition, such as siloxane polymer, silicone polyimide and the like, has been particularly suggested in view of the heat resistance of the heat curable composition. The examples using the siloxane polymer are well-known from Japanese Unexamined Patent Publication (Kokai) Nos. 63-241076, 3-126612, 3-188179 and the like, and the examples using the silicone polyimide are well-known from Japanese Unexamined Patent Publication (Kokai) Nos. 61-103927, 63-291922 and the like. Further, in Japanese Unexamined Patent Publication (Kokai) No. 63-291924, the protective coatings of the color filters are suggested to be made of a curable composition consisting of siloxane polymer and silicone polyimide. The curable composition described in Japanese Kokai No. 63-291924 can show relatively superior properties as a protective coating of color filters, however, still needs improvements in terms of coatability, adhesion properties and a storability as liquid.
Further, the prior art concerning anti-reflective glass having scattering-preventing properties is as follows: the glass is a material which has been used as a transparent part in a wide variety of articles for many years, and glass has been widely utilized in our daily lives owing to its excellent properties such as optical characteristics, mechanical properties, durability and other properties. In recent years, in order to improve visual recognition capability, a reflection-free glass has been used, in which a metal oxide such as a thin layer of magnesium fluoride is deposited or sputtered on a glass part of electronic equipments, optical articles, construction or building materials.
However, it is essential for reflection-free glass, when used in many fields of use, to always expose the surfaces to the atmosphere. For example, when the reflection-free glass is used as a construction material, particularly those for high-rise buildings, damage of the glass due to earthquakes and other causes will result in a very dangerous situation to the human body, because when the reflection-free grass is crushed, fragments fall onto the surface of the ground. Further, for indoor use, for example, when the reflection-free glass is used as a display of electric equipment, furniture and the like, there is a possibility that the glass crushed due to an unexpected accident causes injury. Furthermore, when the reflection-free glass is used as a part of the large-sized machine equipments in factories, there is a possibility that tiny particles of glass may further induce a more serious accident, namely, the degree of danger would be further increased.
Furthermore, in many cases, the adhesive and the applications, such as adhesive tapes, adhesive sheets and others, which relate to the present invention are generally used at ordinary room temperature. However, the use is inevitably limited to a specific range, because the use of adhesives can result in drawbacks such as separation from a surface of the adherend, if the adhesive and the adhesive-applied products are exposed to conditions of high temperature and high humidity.
Thus, as a means for solving the above problems of the adhesive, there have been suggested
a pressure-sensitive adhesive comprising an acrylic polymer and the incorporated vinyl silane, epoxy silane, methacryl silane or other silanes,
an adhesive composition comprising an acrylic resin containing a hydroxyl group capable of reacting with an epoxy group and the incorporated epoxy group-containing silane,
an adhesive composition comprising an acrylic resin copolymerized with an ethylenically unsaturated monomer capable of reacting with an isocyanate group and the incorporated isocyanate group-containing organosilicone compound,
an adhesive composition comprising an acrylic resin having incorporated therein a silicate oligomer, and other compositions.
However, the above-mentioned means are insufficient to satisfy the requirements to an adhesion property under a high temperature and high humidity conditions. Particularly, the means do not provide a satisfactory suggestion concerning the adhesion property between a glass substrate and an optical film.
Hitherto, when the plate or sheet glass is packed for a transportation purposes, wooden frames have been used as a packaging material. However, use of wooden frames causes a remarkable increase of bulk (or volume) of the packaged glass, i.e., two or more times of the volume of the plate glass itself to be packed, and contrary to such an increase of bulk, the resulting shock resistance is not always satisfactory to the requirements. Further, foamed plastic sheets, rugged sheets or other sheets have been utilized as packaging materials to transport or store glass articles or potteries, however, these sheets also can not always provide a sufficient shock resistance.
When sunlight is irradiated onto various architectural structures or a glass surface thereof, there may be a loss of comfort to the occupants as a result of an increase of the temperature of the interior space of the structures. Further, there is a risk of the human health being adversely affected due to ultraviolet rays of the
Sakai Yasuhiro
Takushima Hidenori
Dawson Robert
Greenblum & Bernstein P.L.C.
Keehan Christopher M
Pentax Corporation
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