Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1997-01-07
1998-03-31
Marquis, Melvyn I.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
528 27, 525342, 525446, 525476, B32B 702
Patent
active
057336440
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a curable composition and a method for preparing the same. More particularly, the present invention relates to a curable composition and a method for preparing the same, which can be applied to naturally occurring or synthetic silica, iron, stainless steel, aluminum, copper, and other metals, plastics, glass, wood material, cement, concrete and other products, or powders of aluminum hydroxide, calcium silicate, calcium carbonate, magnetic powder and metallic powder, or wire materials such as glass fiber and metallic wires, to form a coating film excellent in scratch resistance, transparency, heat resistance, weather resistance, adhesion, acid resistance, blocking resistance, stain resistance, water resistance, thermal shock resistance, sliding resistance, tipping resistance and other properties, or to obtain modified powders, particles or wires, and which can be satisfactorily used for impregnating various naturally occurring or synthetic materials, or which can be used for bonding or for casting, compression molding and other uses.
BACKGROUND ART
An organic material including Japanese lacquer as a typical example provides an excellent beautiful appearance, but is soft and is easily damaged, and is inconvenient for forming a coating film since it requires wet-on-wet coating.
Accordingly, in recent years, it has been tried to incorporate an inorganic element into an organic material in order to provide high hardness characteristic to an inorganic material. These examples include a fluororesin obtained by polymerizing a fluorine-containing monomer (e.g. "Lumiflon" trade mark of Asahi Glass Company) or a silicon resin obtained by polymerizing a silicon-containing monomer (e.g. "Zemlac" trade mark of Kanegafuchi Kagaku Kogyo K. K.).
However, fluororesin is still soft and easily damaged, and has another disadvantage of easily absorbing an oil component and being easily stained. With regard to the silicon resin, it is possible to raise its hardness, but it is difficult to increase a silicon content to more than 10 wt % (in terms of SiO.sub.2) and a product having a silicon content of at least 10 wt % is not actually present.
Thus, heretofore, an inorganic element has been introduced into an organic compound in the production of a molecule, but the amount of an inorganic element to be introduced into an organic monomer is limited. That is, the number of inorganic elements which can be introduced into an organic compound is limited.
On the other hand, there have been developed methods for protecting workpieces or structures with inorganic materials from natural environments, maintaining their beautiful appearances and prolonging their lives. Examples of these techniques include a method for coating the surface of a metal with an "amorphous material having a polysiloxane bond comprising silicon and oxygen as the main components", and a Japanese "cloisonne" ware may be illustrated as an example. The Japanese "cloisonne" ware is obtained by coating a starting powder comprising silica sand as the main component on the surface of a metal such as copper, firing and melting the inorganic material to form an amorphous film.
The above "amorphous material having a polysiloxane bond comprising silicon and oxygen as the main components" has advantages such as maintenance of beautiful appearance, excellent weather resistance, scratch resistance and acid resistance, but also has a disadvantage that it is brittle (brittle and easily breakable).
Accordingly, the present inventors have employed such an amorphous polysiloxane bond as in the above-mentioned "cloisonne" ware in the introduction of silicon into an organic compound, and have overcome the above-mentioned disadvantages of the above resin and the "cloisonne" ware. Further, they have studied to provide an organic coating film improved in flexibility, and have proposed to provide a novel coating composition using tetramethoxysilane, which is improved in hardness, solvent resistance, chemical resistance, stain resistance,
REFERENCES:
patent: 3429845 (1969-02-01), Bechtold et al.
patent: 3917648 (1975-11-01), McLeod
patent: 4028300 (1977-06-01), Wake et al.
patent: 4374933 (1983-02-01), Scholze et al.
patent: 4714738 (1987-12-01), Chang et al.
patent: 4732929 (1988-03-01), Chang et al.
Advanced Materials, vol. 5, No. 6, Jun. 1, 1993, Bruce NOVAK, "Hybrid Nanocomposite Materials--Between Inorganic Glasses and Organic Polymers", pp. 422-433.
Endo Hozumi
Kajiwara Yukio
Kato Hanako
Matsuzoe Nobuyuki
Oba Kenji
Marquis Melvyn I.
Mitsubishi Chemical Corporation
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