Cure promoter compositions and methods for the same

1 . A cure promoter composition, comprising:

an accelerator comprising disulfiram;

a compatibilizing carrier comprising pentaerythritol tetrakis (3-mercaptopropionate);

one or more organic solvents comprising a ketone; and

a catalyst, comprising a diazole, comprising 1-methylimidazole;

wherein the composition has a shear viscosity at 25° C. of from 0.01 to 10 Pa·s; and, when brushed onto an uncured polysulfide sealant, produces a tack-free surface in less than 60 minutes at 25° C.

2 . The cure promoter composition of claim 1 , wherein the accelerator further comprises a thiocarbamate, a hydrated thiocarbamate, a dithiocarbamate, a thiazole, a mercaptothiazole, a sulfenamide, a thiazolesulfenamide, a metal salt of thiocarbamate, or combinations thereof.

3 . The cure promoter composition of claim 1 , wherein the compatibilizing carrier further 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 tris (3-mercaptopropionate), 2,2′-thiodiethanethiol, 2,2′-trimethylolpropane (ethylenedioxy) diethanethiol, tris (mercaptoalkyl) cyclohexanes, or combinations thereof.

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

6 . 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.

7 . The cure promoter composition of claim 1 , further comprising:

a reducing agent comprising an amine-functional reducing agent selected from 1-methylimidazole, m-xylylenediamine, and 4,N,N-trimethyl aniline;

optionally, one or more reactive silanes;

optionally, one or more reactive organometallics;

optionally, one or more gelling agents; and

optionally, an aqueous component.

8 . The cure promoter composition of claim 1 , wherein the catalyst further comprises an amine.

9 . A cure promoter composition, comprising:

disulfiram;

pentaerythritol tetrakis (3-mercaptopropionate);

an accelerator comprising sulfur chloride;

one or more organic solvents comprising a ketone;

a catalyst comprising 1-methylimidazole;

one or more reactive silanes;

one or more reactive organometallics;

one or more gelling agents;

a catalyst, comprising an amidine; and

an aqueous component;

wherein the cure promoter composition has a shear viscosity at 25° C. of from 0.01 to 10 Pa·s; and, when brushed onto an uncured polysulfide sealant, produces a tack-free surface in less than 60 minutes at 25° C.

10 . The cure promoter composition of claim 9 , further comprising 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.

11 . The cure promoter composition of claim 10 , further comprising trimethylolpropane tris (3-mercaptopropionate), 2,2′-thiodiethanethiol, 2,2′-(ethylenedioxy) diethanethiol, tris (mercaptoalkyl) cyclohexanes, or combinations thereof.

12 . The cure promoter composition of claim 10 , wherein the one or more reactive silanes comprises a glycidoxypropyltrimethoxysilane.

13 . The cure promoter composition of claim 10 , wherein the one or more reactive silanes comprises a mercaptopropyltrimethoxysilane.

14 . The cure promoter composition of claim 9 , further comprising allyl monosulfide, allyl disulfide, ethyl vinyl sulfide, phenyl vinyl sulfide, styrene, or combinations thereof.

15 . A method for applying the cure promoter composition of claim 1 , the method comprising:

contacting the one or more organic solvents, the accelerator, the compatibilizing carrier, 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, resin, paint layer, or combinations thereof onto a substrate; and

applying the cure promoter composition to a surface of the sealant, resin, paint layer, or combinations thereof.

16 . The method of claim 15 , further comprising pausing to allow the sealant, resin, paint layer, or combinations thereof to cure completely.

17 . The method of claim 15 , further comprising abrading the surface of the sealant, resin, paint layer, or combinations thereof.

18 . The method of claim 15 , further comprising:

contacting a first portion comprising the one or more organic solvents, the accelerator, and the catalyst in a first container;

contacting a second portion comprising the one or more organic solvents, the compatibilizing carrier, and the one or more reducing agents in a second container; and

contacting contents of the first container with contents of the second container prior to applying the cure promoter composition to the substrate.

19 . The method of claim 15 , wherein the substrate comprises an aluminum surface, a carbon fiber composite surface, or combinations thereof.

20 . A method for applying a cure promoter composition, comprising:

contacting one or more organic solvents comprising a ketone, an accelerator comprising disulfiram, a compatibilizing carrier, comprising pentaerythritol tetrakis (3-mercaptopropionate), one or more optional reactive silanes, one or more optional organometallics, and a catalyst comprising a diazole, comprising 1-methylimidazole, with one another to prepare a cure promoter composition having a shear viscosity at 25° C. of from 0.01 to 10 Pa·s;

homogenizing the cure promoter composition;

applying a sealant, resin, paint layer, or combinations thereof onto a substrate;

applying the cure promoter composition to a surface of the sealant, resin, paint layer, or combinations thereof;

evaporating the one or more organic solvents from the cure promoter composition; and

pausing to allow the cure promoter time to react;

wherein the composition, when brushed onto an uncured polysulfide sealant, produces a tack-free surface in less than 60 minutes at 25° C.

21 . The method of claim 20 , wherein the contacting one or more organic solvents, the accelerator, a compatibilizing carrier, one or more optional reactive silanes, and one or more optional organometallics with one another to prepare a cure promoter composition further comprises contacting one or more gelling agents.