Water repellent for masonry

Details Water repellent for masonry Water repellent for masonry

1986-12-23

1988-01-05

Page, Thurman K.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273935, 525477, 525479, B05D 302, C08F28312

Patent

active

047175990

ABSTRACT:
There is provided a method for rendering masonry water repellent which comprises (a) contacting the masonry with a solution comprising an organopolysiloxane resin selected from the group consisting of resins containing R.sub.3 SiO.sub.0/5 units and SiO.sub.2 units and resins containing R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO.sub.2 units and SiO.sub.2 units, the ratio of R.sub.3 SiO.sub.0.5 units to SiO.sub.2 units ranging from about 0.2 to about 0.9:1 and resins containing R.sub.3 SiO.sub.0.5 units, R.sub.2 SiO units, and the ratio of SiO.sub.2 units to SiO.sub.2 units being up to about 0.1:1, where each R is an independently selected substituted or unsubstituted alkyl radical, aryl radical, alkaryl radical, aralkyl radical, cycloalkyl radical or alkenyl radical, and (b) evaporating the solvent. Preferably, the resin solution further comprises an alkylalkoxypolysiloxane resin.

REFERENCES:
patent: 2486162 (1949-10-01), Hyde
patent: 4273813 (1981-06-01), Meddaugh
patent: 4486476 (1984-12-01), Fritsch et al.
patent: 4495340 (1985-01-01), Blizzard et al.
patent: 4555419 (1985-11-01), Huhn et al.
patent: 4595610 (1986-06-01), Fey et al.

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