Hyperbranched polymer and cycloaliphatic epoxy resin thermosets

Abstract

The present invention relates to rigid and clear thermosetting compositions formed from dendritic or hyperbranched polymers and cylcoaliphatic epoxy resins. The compositions may be used for coatings such as electronic device packaging, adhesives, wire coatings, and finishes.

1 . A composition of matter comprising: 
 a dendritic polyol;    a cycloaliphatic epoxy resin; and    a cationic initiator.    
     
     
         2 . The composition of matter of  claim 1 , wherein the dendritic polyol comprises about 5-30% by weight of the composition.  
     
     
         3 . The composition of matter of  claim 1 , wherein the dendritic polyol comprises about 10-20% by weight of the composition.  
     
     
         4 . The composition of matter of  claim 1 , wherein the cationic initiator comprises about 0.1-3.0% by weight of the composition.  
     
     
         5 . The composition of matter of  claim 1 , wherein the cycloaliphatic epoxy resin is selected from the group consisting essentially of 3,4-epoxycyclohexyl methyl-3,4-epoxy-cyclohexane carbonate, bis(3,4-epoxycyclohexyl) adipate, and 2-(3,4-epoxycyclohexyl-5,5-spiro-3,4-epoxy) cyclohexane-meta-dioxane.  
     
     
         6 . The composition of matter of  claim 1 , wherein the dendritic polyol is selected from the group consisting essentially of Boltorn H20, Boltorn H30, Boltorn H40, Boltorn H2003, Boltorn H2004.  
     
     
         7 . The composition of matter of  claim 1 , wherein the initiator is selected from the group consisting essentially of FC520, Cp66, Nacure XC 7231, and Nacure super A218.  
     
     
         8 . Use of a composition of matter comprising a dendritic polyol, a cycloaliphatic epoxy resin, and a cationic initiator as an electrical insulator.  
     
     
         9 . A process of coating metal with an electrical insulator, the process including the steps of: 
 providing a mixture of a dendritic polyol, a cycloaliphatic epoxy resin, and a cationic initiator;    coating the metal with the mixture; and    heating the mixture.    
     
     
         10 . The process of  claim 9 , wherein the cycloaliphatic epoxy resin is selected from the group consisting essentially of 3,4-epoxycyclohexyl methyl-3,4-epoxy-cyclohexane carbonate, bis(3,4-epoxycyclohexyl) adipate, and 2-(3,4-epoxycyclohexyl-5,5-spiro-3,4-epoxy) cyclohexane-meta-dioxane.  
     
     
         11 . The process of  claim 10 , wherein the dendritic polyol is selected from the group consisting essentially of Boltorn H20, Boltorn H30, Boltorn H40, Boltorn H2003, and Boltorn H2004.  
     
     
         12 . The process of  claim 11 , wherein the initiator is selected from the group consisting essentially of FC520, Cp66, Nacure XC 7231, and Nacure supper A218.  
     
     
         13 . The process of  claim 9 , wherein the mixture is made by dissolving the dendritic polyol in the cycloaliphatic epoxy resin at a temperature between about 80° C. and about 120° C.  
     
     
         14 . The process of  claim 9 , wherein the mixture also includes a linear polyol.  
     
     
         15 . A coating comprising: 
 a dendritic polyol;    a cycloaliphatic epoxy resin; and    a cationic initiator.    
     
     
         16 . The coating of  claim 16 , further comprising a linear polyol.  
     
     
         17 . The coating of  claim 16 , wherein the dendritic polyol comprises about 5-30% by weight of the composition.  
     
     
         18 . The coating of  claim 16 , wherein the dendritic polyol comprises about 10-20% by weight of the composition.  
     
     
         19 . The coating of  claim 16 , wherein the cationic initiator comprises about 0.1-3.0% by weight of the composition.  
     
     
         20 . The coating of  claim 16 , wherein the cycloaliphatic epoxy resin is selected from the group consisting essentially of 3,4-epoxycyclohexyl methyl-3,4-epoxy-cyclohexane carbonate, bis(3,4-epoxycyclohexyl) adipate, and 2-(3,4-epoxycyclohexyl-5,5-spiro-3,4-epoxy) cyclohexane-meta-dioxane, the dendritic polyol is selected from the group consisting essentially of Boltorn H20, Boltorn H30, Boltorn H40, Boltorn H2003, and Boltorn H2004, and the initiator is selected from the group consisting essentially of FC520, Cp66, Nacure XC 7231, and Nacure super A218.