Solid-gel precursor solutions and methods for the fabrication of

Details Solid-gel precursor solutions and methods for the fabrication of Solid-gel precursor solutions and methods for the fabrication of

1990-10-01

1992-05-05

Lusignan, Michael

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528 40, 528 41, 528 25, 427380, 427387, C08K 320, C08K 505

Patent

active

051108631

ABSTRACT:
Solutions and preparation methods necessary for the fabrication of metal oxide cross-linked polysiloxane coating films are disclosed. The films are useful in provide heat resistance against oxidation, wear resistance, thermal insulation, and corrosion resistance of substrates. The sol-gel precursor solution comprises a mixture of a monomeric organoalkoxysilane, a metal alkoxide M(OR).sub.n (wherein M is Ti, Zr, Ge or Al; R is CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7 ; and n is 3 or 4), methanol, water, HCl and NaOH. The invention provides a sol-gel solution, and a method of use thereof, which can be applied and processed at low temperatures (i.e., <1000.degree. C.). The substrate can be coated by immersing it in the above mentioned solution at ambient temperature. The substrate is then withdrawn from the solution. Next, the coated substrate is heated for a time sufficient and at a temperature sufficient to yield a solid coating. The coated substrate is then heated for a time sufficient, and temperature sufficient to produce a polymetallicsiloxane coating.

REFERENCES:
patent: 4028085 (1977-06-01), Thomas
patent: 4347347 (1982-08-01), Yajima et al.
patent: 4455414 (1984-06-01), Yajima et al.
patent: 4584280 (1986-04-01), Nanao et al.
patent: 4786618 (1988-11-01), Shoup
patent: 4880851 (1989-11-01), Yamamoto
patent: 4948843 (1990-08-01), Roberts et al.

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