Siloxane masonry water repellent emulsions
AssigneeDow Corning Corporation
InventorsDonald T. Liles, Renee A. Klein
Life of this patent
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Abstract
A water repellent composition for treating porous substrates with an emulsion containing a siloxane. The siloxane can be a copolymer such as a linear methylhydrogen-methylalkyl siloxane copolymer or a methylhydrogen-methylalkyl cyclosiloxane copolymer. The emulsion includes from about twenty to about sixty percent by weight of the siloxane copolymer. A low volatile organic content masonry coating is provided.
Claims23
A water repellent composition for treating porous substrates comprising an emulsion which includes water, at least one surfactant, and a siloxane copolymer having a formula selected from the group consisting of ##STR5## where R is an alkyl radical having one to three carbon atoms;
- R' is the alkyl radical (CH.sub.2).sub.c R;
- a is an integer having a value of from 3 to 35;
- b is an integer having a value of from one to 32;
- c is an integer having a value of from one to seventeen;
- d is an integer having a value of from 3 to 10;
- and e is an integer having a value of from one to seven.
A method for treating porous substrates comprising applying to the substrate an emulsion which includes water, at least one surfactant, and a siloxane copolymer having a formula selected from the group consisting of ##STR7## where R is an alkyl radical having one to three carbon atoms;
- R' is the alkyl radical (CH.sub.2).sub.c R;
- a is an integer having a value of from 3 to 35;
- b is an integer having a value of from one to 32;
- c is an integer having a value of from one to seventeen;
- d is an integer having a value of from 3 to 10;
- and e is an integer having a value of from one to seven.
Dependencies are inferred from the claim text.