CURABLE RESIN COMPOSITIONS
A photocationically-curable composition including (a) at least one divinylarene dioxide, (b) at least one cationic photoinitiator, and (c) at least one cyclic ester compound; a process for making the curable composition; and a cured product made therefrom. The cured product made from the above curable composition offers improved properties and are useful for various applications including ink formulations.
1 . A photocationically-curable composition comprising (a) at least one divinylarene dioxide (b) at least one cationic photoinitiator, and (c) at least one cyclic ester compound.
2 . The composition of claim 1 , wherein the divinylarene dioxide has a hydrolytic stability of greater than 60%.
3 . The composition of claim 1 , wherein the divinylarene dioxide is selected from the group comprising one or more divinylbenzene dioxide, substituted divinylbenzene dioxide, divinylnaphthalene dioxide, divinylbiphenyl dioxide, divinyl-diphenylether dioxide, and mixtures thereof.
4 . The composition of claim 1 , wherein the divinylarene dioxide is divinylbenzene dioxide.
5 . The composition of claim 1 , wherein the concentration of the divinylarene dioxide ranges from about 1 weight percent to about 99 weight percent;
wherein the concentration of said at least one cationic photoinitiator ranges from about 0.05 weight percent to about 20 weight percent; and wherein the concentration of the cyclic ester compound ranges from about 0.95 weight percent to about 98.95 weight percent.
6 . The composition of claim 1 , wherein the at least one cationic photoinitiator comprises diphenyl(phenylthiophenyl)sulfonium cation; bis[4-(diphenyl-sulfonio)phenyl]sulfide bis cation; triphenylsulfonium cation; hexafluoroantimonate (SbF 6 − ) anion, SbF x (OH) y - where x+y=6 anion; hexafluorophosphate (PF 6 − ) anion; and mixtures thereof.
7 . The composition of claim 1 , wherein the cyclic ester compound is a lactone or a lactide.
8 . The composition of claim 1 , wherein the cyclic ester compound is ε-caprolactone, γ-caprolactone, or lactide.
9 . The composition of claim 1 , including (d) at least one pigment material; at least one alcohol; at least one polyol; at least one reactive diluent; at least one a viscosity modifier; at least one oxetane; or mixtures thereof.
10 . The composition of claim 9 , wherein the pH of the at least one pigment material comprises from about 4 to about 9.
11 . The composition of claim 9 , wherein the at least one pigment material comprises copper phthalocyanine blue pigment, titanium dioxide, and mixtures thereof.
12 . The composition of claim 9 , wherein the concentration of said at least one pigment material ranges from about 1 weight percent to about 80 weight percent.
13 . A process for preparing a curable composition comprising admixing (a) at least one divinylarene dioxide, (b) at least one cationic photoinitiator, and (c) at least one cyclic ester compound.
14 . A cured product from curing the composition of claim 1 .