Lithium alkylsiliconate composition, coating, and method of making same

Patent metadata

Field	Value
Publication number	US-2019106442-A1
Application number	US-201716089663-A
Country	US
Kind code	A1
Filing date	Feb 6, 2017
Priority date	Apr 20, 2016
Publication date	Apr 11, 2019
Grant date	—

Abstract

A method of making a lithium alkylsiliconate composition comprising adding an alkylalkoxysilane to a first mixture comprising lithium hydroxide and water to form a second mixture comprising a lithium alkylsiliconate and an alcohol, wherein i) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 0.9 to less than 1.1 and the water is from 89 to 93 mol %, or ii) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 1.1 to 1.4 and the water is from greater than 93 to 99 mole %.

First claim

1 . A method of making a lithium alkylsiliconate composition, the method comprising:
adding an alkylalkoxysilane to a first mixture comprising lithium hydroxide and water to form a second mixture comprising a lithium alkylsiliconate and an alcohol, wherein i) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 0.9 to less than 1.1 and the water is from 89 to 93 mol %, or ii) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 1.1 to 1.4 and the water is from greater than 93 to 99 mole %.

2 . The method of claim 1 , wherein the method further comprises separating the alcohol from the second mixture.

3 . The method of claim 1 , wherein the alkylalkoxysilane has the formula
R a Si(OR) 4-a   (I),
wherein each R is independently C 1 -C 10 alkyl or cycloalkyl; and the subscript a is 1, 2 or 3.

4 . The method of claim 1 , wherein the alkylalkoxysilane is CH 3 Si(OCH 3 ) 3 .

5 . The method of claim 1 , wherein the mixture comprising lithium hydroxide and water is at a temperature from 25 to 80° C.

6 . The lithium alkylsiliconate composition produced by the method of claim 1 .

7 . A method of making a coating, the method comprising:
making a lithium alkylsiliconate composition by a method comprising adding an alkylalkoxysilane to a first mixture comprising lithium hydroxide and water to form a second mixture comprising a lithium alkylsiliconate and an alcohol, wherein i) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 0.9 to less than 1.1 and the water is from 89 to 93 mol %, or ii) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 1.1 to 1.4 and the water is from greater than 93 to 99 mole %; and applying the lithium alkylsiliconate composition to a substrate and drying the lithium alkylsiliconate composition to produce a coating.

8 . The coating formed according to the method of claim 7 .

9 . The coating of claim 8 , wherein the coating has an 8-hour water absorption of less than 1.2 milliliters.

10 . A method of protecting a substrate, the method comprising:
making a lithium alkylsiliconate composition by a method comprising adding an alkylalkoxysilane to a first mixture comprising lithium hydroxide and water to form a second mixture comprising a lithium alkylsiliconate and an alcohol, wherein i) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 0.9 to less than 1.1 and the water is from 89 to 93 mol %, or ii) the mole ratio of lithium hydroxide to alkylalkoxysilane is from 1.1 to 1.4 and the water is from greater than 93 to 99 mole %; and applying the lithium alkylsiliconate composition to a substrate and drying the lithium alkylsiliconate composition.

11 . The method of claim 10 , wherein the substrate has a horizontal surface, and wherein the lithium alkylsiliconate composition is used to protect the horizontal surface, provided the substrate is not constructed from concrete, stone, or masonry or is not exposed flooring.

12 . The method of claim 10 , wherein the substrate has a vertical surface, and wherein the lithium alkylsiliconate composition is used to protect the vertical surface.

13 . (canceled)

14 . (canceled)

15 . (canceled)

16 . The method of claim 7 , where the substrate is a silica-containing material.

17 . The method of claim 1 , further comprising separating the alcohol from the lithium alkylsiliconate composition.

18 . The method of claim 7 , further comprising adding a diluent and/or other coating composition ingredients to the lithium alkylsiliconate composition.

Assignees

• Dow Silicones Corp

Inventors

• Moore James A
• Nguyen Binh Thanh
• Selley David Brian
• Tselepis Arthur James
• Tzou Ming-Shin

Classifications

• C04B28/02

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B41/009 Primary

  characterised by the material treated · CPC title

• C04B41/64

  Compounds having one or more carbon-to-metal of carbon-to-silicon linkages · CPC title

• C08G77/398

  containing boron or metal atoms · CPC title

• C04B41/4927

  Alkali metal or ammonium salts · CPC title