Method of preventing deterioration of inorganic substrate surfac

Details Method of preventing deterioration of inorganic substrate surfac Method of preventing deterioration of inorganic substrate surfac

1975-07-08

1977-02-01

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 12, C04B 4122

Patent

active

040060306

ABSTRACT:
The surface of an inorganic substrate comprising cement, concrete, gypsum or mixtures thereof is treated with a silicate solution or a silica sol comprising a monovalent alkali metal containing component, an ammonium containing component and a silica containing component at a molar ratio of 1:1.about. 10:4.about.5000 corresponding to M.sub.2 O:[R.sub.1 R.sub.2 R.sub.3 R.sub.4 N].sub.2 O: SiO.sub.2 wherein M is Li, K or Na; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent a hydrocarbon group or an alkanol group. The underlying inorganic substrate thus has a modified surface layer thereon having a thickness of less than 50 mm, which functions to protect and prevent deterioration of the underlying surface of said inorganic substrate.

REFERENCES:
patent: 1238202 (1917-08-01), Schwerin
patent: 3625722 (1971-12-01), VON Freyhold et al.

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