Compositions for use in impregnation of paper bushings
AssigneeHuntsman Advanced Materials Licensing (Switzerland) GmbH
InventorsChristian Beisele, Hubert Wilbers, Daniel Baer
Life of this patent
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Abstract
The disclosure relates to a curable mixture for use in impregnation of paper bushings comprising a resin mixture of a bisphenol-A-diglycidylether (BADGE) and a bisphenol-F-diglycidylether (BFDGE), methyltetrahydrophthalic anhydride (MTHPA) as hardener, and an accelerator selected from the group consisting of tertiary alkylamine aminoethylalcohols and corresponding ethers thereof as well as paper bushings impregnated with such mixture and uses of such mixture.
Claims14
A curable mixture comprising (i) a resin mixture comprising a bisphenol-A-diglycidylether (BADGE) and a bisphenol-F-diglycidylether (BFDGE), (ii) methyltetrahydrophthalic anhydride (MTHPA), and (iii) an accelerator selected from N,N,N′-trimethyl-N′-hydroxyethyl-bisaminoethyl ether, N-(3-dimethylaminopropyl)-N, N-diisopropanolamine, N,N-bis(3-dimethylaminopropyl)-N-isopropanolamine, and a mixture thereof wherein the curable mixture contains less than 0.2 pbw of the accelerator based on 100 pbw of the resin mixture.
A curable mixture comprising (i) a resin mixture comprising a bisphenol-A-diglycidylether (BADGE) and a bisphenol-F-diglycidylether (BFDGE), (ii) methyltetrahydrophthalic anhydride (MTHPA), and (iii) N,N,N′-trimethyl-N′-hydroxyethyl-bisaminoethyl ether wherein the curable mixture contains less than 0.2 pbw of N,N,N′-trimethyl-N′-hydroxyethyl-bisaminoethyl ether based on 100 pbw of the resin mixture.
Dependencies are inferred from the claim text.