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US 2016/0108279 A1Published application
Chemical Vapor Resistant Epoxy Composition
AssigneeHenkel IP & Holding GmbH
InventorsRobert H. Pauze, Boris Krivopal, Timothy P. Walsh
Life of this patent
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Abstract
A two part, curable, epoxy composition useful for potting or sealing electrical devices for use in hazardous locations. Cured reaction products of the epoxy composition meet most or all UL 674 requirements and are useful to seal apertures in electrical equipment. Equipment sealed with the disclosed compositions can meet the UL 674 requirement.
Claims24
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An electrical device, comprising:
- a housing defining an aperture providing a route between a housing exterior and a housing interior volume;
- and a mixed two part, epoxy composition sealing the aperture, wherein the epoxy composition mixture comprises an epoxy resin component comprising a novolac epoxy resin, a bisphenol F epoxy resin or a mixture thereof and optionally additives;
- and
- a curing agent component selected from an aliphatic amine, an amine functional adduct of ethylene diamine and an epoxy resin, an amine functional adduct of an amine and a bisphenol F epoxy resin, an aliphatic amine and an amine functional adduct of ethylene diamine and an epoxy resin, or an aliphatic amine and an epoxy resin, an amine functional adduct of an amine and a bisphenol F epoxy resin, and optionally additives and the electrical device is suitable for use in Division 1 hazardous locations.
1 more element
A method of using an epoxy composition to seal an electrical device, comprising
- providing an electrical device having a housing enclosing an interior space and having an exterior surface, the exterior surface defining an aperture providing communication into and out of the interior space;
- providing an epoxy composition mixture comprising an epoxy resin component comprising a novolac epoxy resin, a bisphenol F epoxy resin or a mixture thereof and optionally additives;
- and a separate curing agent component selected from an aliphatic amine, an amine functional adduct of ethylene diamine and an epoxy resin, an amine functional adduct of an amine and a bisphenol F epoxy resin, an aliphatic amine and an amine functional adduct of ethylene diamine and an epoxy resin, or an aliphatic amine and an epoxy resin, an amine functional adduct of an amine and a bisphenol F epoxy resin, and optionally additives
- mixing the epoxy resin component and the curing agent to form a mixed epoxy composition
- disposing the mixed epoxy composition into the housing aperture;
- exposing the mixed epoxy composition to conditions appropriate to cure the epoxy composition to form cured reaction products in the housing aperture;
- wherein the cured reaction products seal the housing interior space and the electrical device is suitable for use in Division 1 hazardous locations.
4 more elements
Dependencies are inferred from the claim text.