Patent ID: 7754824

Claim:
A thermally curable composition consisting essentially of: from about 10% to about 20% by weight of a dendritic polyol having a molecular weight of from 1,750 to 7,250; a hydroxyl functionality of from 6 to 64, and a hydroxyl number of from 125 to 505; from 0.25% to 1.0% by weight of an initiator consisting of S-butenethiophene hexafluoroantimonate and ammonium hexafluoroantimonate; optionally, a non-dendritic polyol in an amount of up to half the amount by weight of the dendritic polyol; and at least one cycloaliphatic epoxy resin comprising the balance of the composition; wherein the cured composition has a decomposition temperature greater than 400° C. in an air atmosphere and is transparent.