Chemical vapor resistant epoxy composition

Patent metadata

Field	Value
Publication number	US-10087341-B2
Application number	US-201514967999-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Sep 23, 2010
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

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.

First claim

What is claimed is:

1. 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, room temperature curable epoxy composition sealing the aperture, wherein the epoxy composition consists of an epoxy resin component and a curing agent component, the mixed epoxy composition having a viscosity of about 8,000 to about 30,000 cps;
the epoxy resin component consisting of an epoxy resin and optionally additives, wherein the epoxy resin is selected from the group consisting of a novolac epoxy resin, a bisphenol F epoxy resin and a mixture thereof; and wherein the additives are selected from the group consisting of particulate impact modifiers, auxiliary impact modifiers, auxiliary toughening agents, diluents, adhesion promoters, fillers, thixotropes, 2-furanmethanol, benzyl alcohol, and combinations thereof; and
the curing agent component consisting of a curing agent and optionally additives, wherein the curing agent is selected from the group consisting of 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, and a mixture thereof; and wherein the additives are selected from the group consisting of particulate impact modifiers, auxiliary impact modifiers, auxiliary toughening agents, diluents, adhesion promoters, fillers, thixotropes, 2-furanmethanol, benzyl alcohol, and combinations thereof; and
wherein the electrical device is suitable for use in Division 1 hazardous locations.

2. The electrical device of claim 1 , comprising a wire disposed through the aperture and the mixed two part, epoxy composition.

3. The electrical device of claim 1 , wherein the two part, epoxy composition is cured and the electrical device is compliant with UL 674.

4. 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 the epoxy composition of claim 1 ;
mixing the epoxy resin component and the curing agent component 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.

5. The method of claim 4 , comprising a wire disposed through the aperture and the cured reaction products.

6. The method of claim 4 , wherein the electrical device is compliant with UL 674.

7. The electrical device of claim 1 , wherein the epoxy composition mixture does not include a bisphenol A epoxy resin.

8. The electrical device of claim 1 , wherein the epoxy composition mixture is self leveling.

9. The electrical device of claim 1 , selected from an electrical motor, an electrical generator, an electrical panel, an electrical raceway and an electrical junction.

10. 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, room temperature curable epoxy composition sealing the aperture, wherein the epoxy composition consists of an epoxy resin component and a curing agent component;
the epoxy resin component consisting of an epoxy resin and optionally additives, wherein the epoxy resin is selected from the group consisting of a novolac epoxy resin, a bisphenol F epoxy resin and a mixture thereof; and wherein the additives are selected from the group consisting of particulate impact modifiers, auxiliary impact modifiers, auxiliary toughening agents, diluents, adhesion promoters, fillers, thixotropes, 2-furanmethanol, benzyl alcohol, and combinations thereof; and
the curing agent component consisting of a curing agent and optionally additives, wherein the curing agent is selected from the group consisting of 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, and a mixture thereof; and wherein the additives are selected from the group consisting of particulate impact modifiers, auxiliary impact modifiers, auxiliary toughening agents, diluents, adhesion promoters, fillers, thixotropes, 2-furanmethanol, benzyl alcohol, and combinations thereof; and
wherein at least one of the epoxy resin component or the curing agent component includes 2-furanmethanol and wherein the electrical device is suitable for use in Division 1 hazardous locations.

Assignees

• Henkel IP & Holding GmbH

Inventors

• Pauze Robert H
• Krivopal Boris
• Walsh Timothy P

Classifications

• H05K5/069

  Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft · CPC title

• C08G59/184

  with amines · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C09J163/00

  Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins · CPC title

• H05K5/02

  Details · CPC title