ADDUCTS BASED ON DIVINYLARENE OXIDES
A polyamine adduct including the reaction product of (a) a divinylarene dioxide, and (b) an excess of a polyamine to provide an adducted polyamine composition; a process for making the adduct; a curable epoxy resin composition including (i) the adduct derived from divinylbenzene such as divinylbenzene dioxide (DVBDO), (ii) at least one epoxy resin, and (iii) optionally, a co-curing agent and/or a catalyst; and a cured product made from said curable epoxy resin composition. The cured product made from the curable epoxy resin composition is thermally stable and offers improved properties such as a low viscosity and a high heat resistance.
1 . A polyamine adduct comprising the reaction product of (a) a divinylarene dioxide, and (b) an excess of a polyamine to provide an adducted polyamine composition; wherein the composition has a ratio of amine-hydrogen equivalents/epoxide equivalents greater than 5.
2 . A curable epoxy resin composition comprising (i) the polyamine adduct of claim 1 ; and (ii) at least one epoxy resin composition.
3 . The composition of claim 1 or claim 2 , wherein the ratio of amine-hydrogen equivalents/epoxide equivalents is greater than or equal to 6.
4 . The composition of claim 1 or claim 2 , including a co-curing agent.
5 . The composition of claim 1 or claim 2 , including a catalyst.
6 . The composition of claim 1 or claim 2 , wherein the divinylarene dioxide is divinylbenzene dioxide.
7 . The composition of claim 4 , wherein the co-curing agent comprises a polyamine.
8 . The composition of claim 4 , wherein the concentration of said co-curing agent ranges from about 1 to about 99 eq. % of the total of the curing agents used in the formulation.
9 . The composition of claim 5 , wherein the catalyst comprises catalyst compounds containing amine, phosphine, heterocyclic nitrogen, ammonium, phosphonium, arsonium, sulfonium moieties, and any combination thereof.
10 . The composition of claim 5 , wherein the concentration of said catalyst ranges from about 0.01 weight percent to about 25 weight percent.
11 . A process for preparing a polyamine adduct comprising reacting (a) a divinylarene dioxide, and (b) a polyamine to provide an adducted polyamine composition; wherein the composition has a ratio of amine-hydrogen equivalents/epoxide equivalents greater than 5.
12 . A process for preparing a curable epoxy resin composition comprising admixing (a) the polyamine adduct of claim 1 ; and (b) at least one epoxy resin.
13 . The process of claim 12 , wherein the epoxy resin is divinylbenzene dioxide.
14 . The process of claim 11 or claim 12 , wherein the process is carried out at a temperature in the range of from about 0° C. to about 200° C.