Water-based epoxy patterned porous insulation
AssigneeWestinghouse Electric Corp.
InventorWilliam S. Pataki
Life of this patent
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Abstract
An adhesive solid emulsion, containing both high and low epoxy equivalent weight epoxy solids, a curing agent and an optional emulsifying agent, in a carrier containing at least about 55 weight percent water is continuously coated on at least one side of a moving, porous, flexible sheet as discrete resin pattern areas, which resin coated sheet is heated to dry the adhesive emulsion to the B-stage.
Claims5
A flexible, B-staged, porous insulation comprising a porous sheet material, having coated thereon discrete pattern areas of adhesive resin, covering from about 10 percent to about 90 percent of the area of at least one side of the sheet, said adhesive resin comprising a first epoxy resin, having an epoxy equivalent weight range of from about 5,000 to about 10,000;
- and a second epoxy resin, having an epoxy equivalent weight range of from about 125 to about 1,500, where the weight ratio of first epoxy resin:
- second epoxy resin is from about 0.15 to 0.65:1, the thickness of the resin pattern is from about 0.0002 inch to about 0.00125 inch, and the resin does not saturate under the adhesive pattern areas any more than about 0.0002 inch.
Dependencies are inferred from the claim text.