Water repellent for masonry

Claim 3

A method as in claim 1, wherein the organopolysiloxane resin solution contains from about 1 to about 20 weight percent resin solids.

Claim 4

A method as in claim 1, wherein the organopolysiloxane resin solution contains about 10 weight percent resin solids.

Claim 5

A method as in claim 1, wherein substantially all of the R groups are methyl.

Claim 6

A method as in claim 1, wherein the masonry is selected from the group consisting of brick, concrete, cinder block, mortar, tile, stone, stucco, sandstone and limestone.

Claim 7

A method as in claim 5, wherein the masonry is a statue or stone monument.

Claim 8

A method as in claim 1, wherein the organopolysiloxane resin solution further comprises an alkylalkoxypolysiloxane resin.

Claim 9

A method as in claim 7, wherein the alkylalkoxypolysiloxane resin is a methylmethoxypolysiloxane resin.

Claim 10

A method as in claim 7, wherein the ratio of organopolysiloxane resin selected from the group consisting of resins containing R 3 SiO 0 .5 units and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and resins containing R 3 SiO 0 .5 units, R 2 SiO units, and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and the ratio of R.sub. 2SiO 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, to alkylalkoxypolysiloxane resin is from about 1:1 to about 9:1.

Claim 11

A method as in claim 9 wherein the ratio is about 7:3.

Claim 12

A composition for rendering masonry water repellent, consisting of: (a) an organopolysiloxane resin selected from the group consisting of resins containing R 3 SiO 0 .5 units and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and resins containing R 3 SiO 0 .5 units, R 2 SiO units, and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and the ratio of R 2 SiO units to SiO 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; (b) an alkylalkoxypolysiloxane resin; and (c) an effective amount of solvent.

Claim 13

A composition for rendering masonry water repellent, consisting of: (a) an organopolysiloxane resin selected from the group consisting of resins containing R 3 SiO 0 .5 units and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and resins containing R 3 SiO 0 .5 units, R 2 SiO units, and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and the ratio of R 2 SiO units to SiO 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; (b) an alkylalkoxypolysiloxane resin; and (c) an effective amount of solvent.

Claim 14

A composition as in claim 11, wherein the ratio of (a) to (b) is from about 1:1 to about 9:1.

Claim 15

A composition as in claim 11, wherein the ratio of (a) to (b) is about 7:3.

Claim 16

A composition as in claim 11, wherein the solvent is an organic solvent.

Claim 17

A composition as in claim 14, wherein the solvent is selected from toluene and xylene.

Claim 18

A composition as in claim 11, wherein the composition is from about 1 to about 20 weight percent resin solids.

Claim 19

A composition as in claim 11, wherein the alkylalkoxypolysiloxane resin has the empirical formula R Si (Or).sub.n O.sub.(3-n/2) wherein n is a number from 1/3 to 1, R is a monovalent organic radical having no olefinic unsaturation in which the free valence is connected to an acyclic carbon atom to which at least one hydrogen atom is attached, and in which any atom other than carbon and hydrogen is a halogen having an atomic weight less than 80 that is attached to a carbon atom other than one connected to said acyclic carbon atom; and r is a monovalent organic radical having no olefinic unsaturation in which the free valence is connected to an aliphatic carbon atom to which at least one hydrogen atom is attached, and in which any atom other than carbon and hydrogen is a halogen having an atomic weight less than 80.

Claim 20

A composition as in claim 11, wherein the alkylalkoxypolysiloxane resin has the formula CH.sub.3 SI (OCH.sub.3).sub.n O.sub.(3-n/2) where n has a value of from 1/3 to 0.7 and is prepared by (a) treating methyltrichlorosilane in the absence of water and in the presence of a water insoluble inert solvent for the latter with methanol in an amount equal to from 1 to less than 3 moles methanol per mole of methyltrichlorosilane, the upper limit of methanol being sufficient to replace only part of the silocon-bonded chlorine atoms of the methyltrichlorosilane with methoxy groups, the by-product HCl being retained in the reaction mixture, (b) hydrolyzing the mixing of ingredients of (a) with a mixture of ingredients comprising methanol and water in which the water used is present in an amount equal to from 1.15 to 1.33 moles of the latter per mole of methyltrichlorosilane originally used, there being employed in step (a) from 25 to 75% of the total amount of methanol used in steps (a) and (b), (c) permitting the hydrolysis product of (b) to condense in the presence of the hydrogen chloride dissolved in the reaction mixture, and (d) isolating the resin-containing layer from the multiphase liquid system obtained as a result of the condensation described in (c).

Claim 21

A composition consisting of: (a) an organopolysiloxane resin selected from the group consisting of resins containing R 3 SiO 0 .5 units and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and resins containing R 3 SiO 0 .5 units, R 2 SiO units, and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and the ratio of R 2 SiO units to SiO 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; (b) an alkylalkoxypolysiloxane resin; and (c) an effective amount of solvent.

Claim 22

A composition consisting of: (a) an organopolysiloxane resin selected from the group consisting of resins containing R 3 SiO 0 .5 units and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and resins containing R 3 SiO 0 .5 units, R 2 SiO units, and SiO 2 units, the ratio of R 3 SiO 0 .5 units to SiO 2 units ranging from about 0.2 to about 0.9:1 and the ratio of R 2 SiO units to SiO 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; (b) an alkylalkoxypolysiloxane resin; and (c) an effective amount of solvent.

Claim 23

The composition of claim 19 wherein the alkylalkoxypolysiloxane resin has the empirical formula: R Si (Or).sub.n O.sub.(3-n)/2 wherein n is a number from 1/3 to 1, R is a monovalent organic radical having no olefinic unsaturation in which the free valence is connected to an acyclic carbon atom to which at least one hydrogen atom is attached, and in which any atom other than carbon and hydrogen is a halogen having an atomic weight less than 80 that is attached to a carbon atom other than one connected to said acyclic carbon atom; and r is a monovalent organic radical having no olefinic unsaturation in which the free valence is connected to an aliphatic carbon atom to which at least one hydrogen atom is attached, and in which any atom other than carbon and hydrogen is a halogen having an atomic weight less than 80.

Claim 24

The composition of claim 19 wherein the alkylalkoxypolysiloxane resin has the formula: CH.sub.3 Si (OCH.sub.3).sub.n O.sub.(3-n)/2 where n has a value of from 1/3 to 0.7.

Claim 25

The composition of claim 19 wherein the ratio of (a) to (b) is from about 30:4.3 to about 30:17.2.