Cure promoter compositions and methods for the same

Patent metadata

Field	Value
Publication number	US-11802193-B2
Application number	US-202217654248-A
Country	US
Kind code	B2
Filing date	Mar 10, 2022
Priority date	Apr 28, 2021
Publication date	Oct 31, 2023
Grant date	Oct 31, 2023

Abstract

A cure promoter composition is disclosed, including an accelerator which may include a thiocarbamate, a hydrated thiocarbamate, a dithiocarbamate, a thiazole, a mercaptothiazole, a sulfenamide, a thiazolesulfenamide, a metal salt of thiocarbamate, sulfur chloride, or combinations thereof. The cure promoter composition also includes a compatibilizing carrier, one or more organic solvents, a catalyst, an optional reducing agent, an optional reactive silane, an optional reactive organometallic, an optional gelling agent, and an optional aqueous component. A method for applying the cure promoter composition is disclosed, including contacting the organic solvents, the accelerator, the carrier, the reactive silanes, the reactive organometallics, the reducing agents, and the catalyst with one another to prepare the cure promoter composition, homogenizing the cure promoter composition, pausing after homogenizing to allow the cure promoter time to react, applying a sealant onto a substrate, and applying the cure promoter composition to a surface of the sealant.

First claim

What is claimed is:

1. A cure promoter composition, consisting of:
an accelerator comprising a thiocarbamate, a hydrated thiocarbamate, a dithiocarbamate, a thiazole, a mercaptothiazole, a sulfenamide, a thiazolesulfenamide, a metal salt of thiocarbamate, sulfur chloride, or combinations thereof;
a compatibilizing carrier;
one or more organic solvents;
a catalyst;
a reducing agent;
one or more reactive silanes;
one or more reactive organometallics;
one or more gelling agents; and
an aqueous component.

2. The cure promoter composition of claim 1 , wherein the accelerator is disulfiram.

3. The cure promoter composition of claim 1 , wherein the compatibilizing carrier comprises a monomer, an oligomer, a low molecular weight poly sulfides, a low molecular weight poly thiol, a low molecular weight vinyl functional compound, an organic solvent, or combinations thereof.

4. The cure promoter composition of claim 3 , further comprising pentaerythritol tetrakis(3-mercaptopropionate), trimethylolpropane tris(3-mercaptopropionate), 2,2′-thiodiethanethiol, 2,2′-(ethylenedioxy)diethanethiol, tris(mercaptoalkyl) cyclohexanes, or combinations thereof.

5. The cure promoter composition of claim 3 , wherein the compatibilizing carrier comprises a low molecular weight poly sulfide.

6. The cure promoter composition of claim 1 , wherein the compatibilizing carrier comprises allyl monosulfide, allyl disulfide, ethyl vinyl sulfide, phenyl vinyl sulfide, styrene, or combinations thereof.

7. The cure promoter composition of claim 1 , wherein the one or more organic solvents comprise an aliphatic hydrocarbon, an aromatic compound, a ketone, an amine, an ester, an alcohol, an aldehyde, an ether, or combinations thereof.

8. The cure promoter composition of claim 1 , wherein the catalyst comprises an amidine, a diazole, an amine, a pyridine, or combinations thereof.

9. The cure promoter composition of claim 1 , wherein the cure promoter composition comprises one or more reducing agents, the reducing agent comprising cysteamine, betamercaptoethanol, dithiothreitol, tri s(2-carboxyethyl) phosphine hydrochloride, dithiobutylamine, glutathione, or combinations thereof.

10. The cure promoter composition of claim 9 , wherein the reducing agent comprises cysteamine.

11. The cure promoter composition of claim 1 , wherein the cure promoter composition comprises one or more reactive silanes, the one or more reactive silanes comprising a glycidoxypropyltrimethoxysilane, a mercaptopropyltrimethoxysilane, or combinations thereof.

12. The cure promoter composition of claim 11 , wherein the cure promoter composition comprises a glycidoxypropyltrimethoxysilane.

13. The cure promoter composition of claim 11 , wherein the cure promoter composition comprises a mercaptopropyltrimethoxysilane.

14. The cure promoter composition of claim 1 , wherein the cure promoter composition comprises one or more reactive organometallics, the one or more reactive organometallics comprising a reactive titanate, a reactive zirconate, a reactive aluminate, or combinations thereof.

15. The cure promoter composition of claim 1 , wherein the cure promoter comprises one or more gelling agents, and wherein the one or more gelling agents comprises has a viscosity of about 0.001 to about 2000 Pa·s at a shear rate of about 0.1 to about 100 sec 1 .

16. The cure promoter composition of claim 1 , wherein the cure promoter composition comprises no gelling agent and the cure promoter composition has a viscosity of about 0.001 to about 50 Pa-s at a shear rate of about 0.1 to about 100 sec 1 .

17. The cure promoter composition of claim 1 , wherein the accelerator comprises a thiocarbamate.

18. The cure promoter composition of claim 1 , wherein the accelerator comprises a hydrated thiocarbamate.

19. The cure promoter composition of claim 1 , wherein the accelerator comprises a dithiocarbamate.

20. The cure promoter composition of claim 1 , wherein the accelerator comprises a thiazole.

Assignees

• Boeing Co

Inventors

• Dustin Ashley Marie
• Bui Phuong
• Fors Stella
• Nowak Andrew P
• Miller Melinda Dae
• Pajel Carissa Ann

Classifications

• C08K5/0025 Primary

  Crosslinking or vulcanising agents; including accelerators · CPC title

• B05D3/108

  Curing · CPC title

• C08K5/40

  Thiurams, {i.e. compounds containing[IMAGE cpc-sch-C08K-1011.gif] groups} · CPC title

• C08G75/04 Primary

  from mercapto compounds or metallic derivatives thereof (C08G75/0204 takes precedence) · CPC title

• C08G75/08

  from thiiranes · CPC title