Method of protecting a surface

Details Method of protecting a surface Method of protecting a surface

1996-04-17

1998-05-05

Speer, Timothy

Stock material or miscellaneous articles

Composite

Of silicon containing

428325, 428330, 428331, 428540, 428704, 4273977, B32B 904

Patent

active

057471711

ABSTRACT:
A method of protecting a porous material sensitive to corrosion caused by pollutants in the atmosphere. The method comprises treating the surface of the material with an agent containing more than 90% by weight of silica sol. The agent contains substantially no solid particles with a diameter exceeding about 1 micron. Porous building materials comprising a layer of gelled silica sol present in the pores below the material surface are prepared by the method.

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Chemical Abstracts, vol. 114, No. 2, 14 Jan. 1991, Abstract No. 9073f, T. Sakai et al.`Manufacture of Colloidal Silica`, p. 134.
Database WPIL, Section Ch, Week 8745, 27 Mar. 1986 Derwent Publications Ltd., London, GB; Class A82, AN 87-318140.
WPI Accession No. 83-23642K/10, Onoda Cement KK: "Inorganic hardenable compsn. used e.g. as coating material contains silica sol and alunite powder", JP 58015059.
WPI Accession No. 81-69053D/38, Nippon Steel Corp: "Alkali resistant blast furnaces wall comprises high alumina and/or chamotte refractory the pores of which are soaked with silica sol", JP 56098409.

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