CURABLE COMPOSITIONS
A curable composition or system including (a) at least one divinylarene dioxide, (b) at least one polythiol compound curing agent; and (c) at least one catalyst; wherein the resulting curable composition may be cured at ambient conditions to provide durable cured material.
1 . A curable composition comprising (a) at least one divinylarene dioxide; (b) at least one polythiol compound curing agent; and (c) at least one catalyst; wherein the curable composition is capable of being cured at ambient conditions.
2 . The curable composition of claim 1 , wherein the at least one divinylarene dioxide comprises divinylbenzene dioxide.
3 . The curable composition of claim 1 , wherein the concentration of the at least one divinylarene dioxide comprises from about 1 weight percent to about 99 weight percent.
4 . The curable composition of claim 1 , wherein the at least one polythiol compound curing agent comprises a compound containing at least one thiol moiety.
5 . The curable composition of claim 1 , wherein the concentration of the at least one polythiol compound curing agent comprises from about 99 weight percent to about 1 weight percent.
6 . The curable composition of claim 1 , wherein the at least one catalyst comprises one or more compounds containing a fragment of the following Formula I:
wherein Z in the above structure of Formula I comprises O, S, or a single bond; R 1 -R 4 comprises an alkyl or a cycloalkyl each individually having from 1 to about 20 carbon atoms; R 5 -R 8 each individually comprises H, or an alkyl or a cycloalkyl, wherein the alkyl or cycloalkyl each individually having from 1 to about 20 carbon atoms; n comprises an integer from 2 to 20; m comprises an integer from 0 to 18; and m+n comprises an integer of less than or equal to about 20; and wherein the remaining portion of the catalyst containing the above fragment of Formula I comprises an organic radical having from 1 to about 20 carbon atoms.
7 . The curable composition of claim 6 , wherein n comprises an integer of 2 up to less than or equal to 10; m comprises an integer of 0 up to about 8; and wherein m+n comprises an integer of less than or equal to about 18.
8 . The curable composition of claim 6 , wherein n comprises an integer of 2 up to less than or equal to 6; m comprises an integer of 0 up to about 4; and m+n comprises an integer of less than or equal to about 6.
9 . The curable composition of claim 6 , wherein the curing catalyst comprises 1,4-diazabicyclo[2.2.2]octane; N,N,N′,N″,N″-pentamethyldiethylenetriamine; 1,4-dimethylpiperazine; 1-methyl-4-(2-dimethylaminoethyl)piperazine; bis-(2-dimethylaminoethyl)ether; N,N,N′,N″,N″-pentamethyldipropylenetriamine; N,N,N,-tris-(3-dimethylaminopropyl)amine; 1,3,5-tris(3-(dimethylamino)propyl)hexahydro-s-triazine; 1,8-diazabicyclo[5.4.0]undec-7-ene; N,N,N′,N′-tetramethyl-1,4-butanediamine; N,N,N′,N′-tetramethyl-1,6-hexanediamine; or mixtures thereof.
10 . The curable composition of claim 6 , wherein the concentration of the curing catalyst comprises from about 0.01 weight percent to about 20 weight percent.
11 . The curable composition of claim 1 , including an epoxy resin other than the at least one divinylarene dioxide, an active hydrogen curing agent other than the at least one polythiol compound curing agent, a filler, a toughening agent, an adhesion promoter, or mixtures thereof.
12 . The curable composition of claim 1 , wherein the composition is capable of curing to a tack-free cured composition within about 48 hours at ambient conditions.
13 . The curable composition of claim 1 , wherein the composition is capable of curing to a tack-free cured composition within about 24 hours at ambient conditions.
14 . The curable composition of claim 1 , wherein the composition is capable of curing to a tack-free cured composition within about 18 hours at ambient conditions.
15 . A process for preparing a curable composition or system comprising admixing (a) at least one divinylarene dioxide; (b) at least one polythiol compound curing agent; and (c) at least one catalyst; wherein the curable composition or system is capable of being cured at ambient conditions.
16 . A process for preparing a curable composition or system comprising the steps of:
(I) admixing at least one divinylarene dioxide and at least one catalyst to form a first solution; and
(II) admixing the first solution of step (I) with at least one polythiol curing agent.
17 . A process for preparing a curable composition or system comprising the steps of:
(A) admixing at least one polythiol curing agent; and at least one catalyst to form a first solution; and
(B) admixing the first solution of step (A) with at least one divinylarene dioxide.
18 . A cured product comprising a cured composition of claim 1 , wherein the cured product comprises a tack-free surface.
19 . A cured product comprising a cured composition of claim 1 , wherein the cured product comprises an un-maned surface after rubbing the surface with an organic solvent.
20 . A cured product comprising a cured composition of claim 1 , wherein the cured product comprises a Shore A hardness as determined by ASTM D2240 of from about 5 to about 100.
21 . A process for preparing a thermoset product comprising the steps of:
(i) preparing a curable composition comprising admixing (a) at least one divinylarene dioxide; (b) at least one polythiol compound curing agent; and (c) at least one catalyst; wherein the curable composition is capable of being cured at ambient conditions; and
(ii) curing the curable composition at ambient conditions.
22 . The process of claim 21 , wherein the ambient conditions include a temperature of from about 0° C. to about 50° C.