Condensation curable composition

Patent metadata

Field	Value
Publication number	US-11760900-B2
Application number	US-202117512083-A
Country	US
Kind code	B2
Filing date	Oct 27, 2021
Priority date	Oct 27, 2021
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

A moisture-curable composition is shown and described herein. The moisture-curable composition comprises a moisture-curable resin and a moisture scavenger selected from a cyanoalkylalkoxysilane. The inclusion of the cyanoalkylalkoxysilane in the moisture-curable composition has been found to effectively scavenge moisture and control the rate of curing and viscosity increase in the composition.

First claim

What is claimed is:

1. A moisture-curable composition comprising:
(a) a moisture-curable resin comprising a polymer that is reactive with water, wherein the moisture-curable resin (a) is selected from a silylated polyol; a silylated polyether; a silylated polyurethane; a silane-containing copolymer derived from the copolymerization of an ethylenically unsaturated silane selected from a vinylsilane, an allylsilane, a methallylsilane, an acryloxyalkylsilane, a methacryloxyalkylsilane, and an ethylenically unsaturated monomer selected from an olefinic hydrocarbon, an acrylic acid, a methacrylic acid, an acrylate ester, a methacrylate ester, an ethylenically unsaturated dicarboxylic acid, and/or an anhydride of the ethylenically unsaturated monomer, oligomers, and/or a polymer possessing ethylenic unsaturation; a combination of two or more thereof; and
(b) a moisture scavenger selected from a cyanoalkylalkoxysilane.

2. The moisture-curable composition of claim 1 , wherein the cyanoalkylalkoxysilane is of the formula:
NC—R 1 —Si(R 2 )(R 3 )(R 4 )

where R 1 is selected from a C1-C20 bivalent hydrocarbon group; R 2 , R 3 , and R 4 are each independently selected from C1-30 monovalent hydrocarbon, a halide, and —OR 5 , where R 5 is independently selected from a C1-30 monovalent hydrocarbon, with the proviso that at least one of R 2 , R 3 , and R 4 is selected from —OR 5 .

3. The moisture-curable composition of claim 2 , wherein R 1 is selected from a C1-20 alkylene; R 2 , R 3 , and R 4 are each independently selected from a C1-20 alkyl, a C4-C20 cycloalkyl, and a C6-C30 aryl, and —OR 5 with the proviso that at least one of R 2 , R 3 , and R 4 is selected from —OR 5 ; and R 5 is independently selected from a C1-20 alkyl.

4. The moisture-curable composition of claim 2 , wherein R 1 is selected from a C1-20 alkylene; each of R 2 , R 3 , and R 4 is selected from a C1-C10 alkyl, and —OR 5 with the proviso that at least one of R 2 , R 3 , and R 4 is selected from —OR 5 , and R 5 is selected from a C1-C10 alkyl.

5. The moisture-curable composition of claim 2 , wherein R 1 is selected from a C1-C4 alkylene, and each of R 2 , R 3 , and R 4 is selected from —OR 5 , where R 5 is independently selected from a C1-C4 alkyl.

6. The moisture-curable composition of claim 1 , wherein the cyanoalkylalkoxysilane is selected from 2-cyanoethyltrimethoxysilane, 2-cyanoethyltriethoxysilane, 2-cyanoethyltripropoxysilane, 2-cyanoethyldimethoxymethylsilane, 2-cyanoethyldimethoxyethyl silane, 2-cyanoethyldiethoxymethyl silane, 2-cyanoethyldiethyoxyethyl silane, 3-cyanopropyltrimethoxysilane, 3-cyanopropyltriethoxysilane, 3-cyanopropyltripropoxysilane, 3-cyanopropyldimethoxymethyl silane, 3-cyanopropyldimethoxyethyl silane, 3-cyanodiethoxymethyl silane, 3-cyanopropyldiethoxyethylsilane, or a combination of two or more thereof.

7. The moisture-curable composition of claim 1 , wherein the cyanoalkylsiloxane is present in an amount of from about 0.1 wt. % to about 20 wt. % based on the total weight of the moisture-curable resin (a).

8. The moisture-curable composition of claim 1 , wherein the cyanoalkylsilane is present in an amount of from about 0.5 wt. % to about 10 wt. % based on the total weight of the moisture-curable resin (a).

9. The moisture-curable composition of claim 1 , wherein the moisture curable resin comprises a hydrolysable silyl group.

10. The moisture-curable composition of claim 2 , wherein the moisture-curable resin (a) is selected from a silylated polyurethane.

11. The moisture-curable composition of claim 10 , wherein the silylated polyurethane is selected from a polymer of the formula:
R z —[OC(O)NH—R 6 Si(R 7 ) x (OR 8 ) 3-x ] y

where R 1 is an organic polymer fragment, R 6 is an alkylene group of up to 12 carbon atoms, optionally containing one or more heteroatoms, each R 7 is the same or different alkyl or aryl group of up to 8 carbon atoms, each R 8 is the same or different alkyl group of up to 6 carbon atoms, x is 0, 1 or 2, and y is 1 to 6.

12. The moisture-curable composition of claim 10 , wherein R 1 is selected from a C1-C20 linear or branched bivalent hydrocarbon group; R 2 , R 3 , and R 4 are each independently selected from a C1-C10 alkyl; where R 5 is selected from a C1-C10 alkyl.

13. The moisture-curable composition of claim 10 , wherein each of R 2 , R 3 , and R 4 is selected from a C1-C20 alkyl, a C4-C20 cycloalkyl, a C6-C30 aryl, or —OR 5 .

14. The moisture-curable composition of claim 10 , wherein R 1 is selected from a C1-C20 linear or branched bivalent hydrocarbon group, and each of R 2 , R 3 , and R 4 is selected from —OR 5 , where R 5 is independently selected from a C1-C4 alkyl.

15. The moisture-curable composition of claim 1 , wherein the composition further comprises an additive selected from a pigment, a filler, a curing catalyst, a dye, a plasticizer, a thickener, a coupling agent, an extender, a solvent, a wetting agent, a tackifiers, a crosslinking agent, a thermoplastic polymer, an adhesion promoter, a UV stabilizer, or a combination of two or more thereof.

16. The moisture-curable composition of claim 1 , wherein the composition further comprises a catalyst that catalyzes the reaction of the moisture-curable resin (a) with water under curing conditions.

17. A cured composition produced by contacting the composition of claim 1 with water.

18. A moisture-curable sealant, adhesive or coating containing the moisture-curable resin composition of claim 1 .

19. A method of forming a cured composition comprising contacting the composition of claim 1 with water.

20. A method of treating a substrate comprising applying a moisture-curable composition of claim 1 to a surface of the substrate.

Assignees

• Momentive Performance Mat Inc

Inventors

• Shen Hao
• Chaves Antonio
• Mckinstry Amy Hua
• Phukan Monjit

Classifications

• C08G2190/00

  Compositions for sealing or packing joints · CPC title

• C08G18/289

  containing silicon · CPC title

• C08G18/5096

  containing silicon · CPC title

• C09D175/04

  Polyurethanes · CPC title

• C09J175/04 Primary

  Polyurethanes · CPC title