Intumescent sheet material with glass fibers
AssigneeMinnesota Mining and Manufacturing Company
InventorRoger L. Langer
Life of this patent
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Abstract
The invention provides an intumescent sheet material comprising 25 to 60 dry weight percent of at least one unexpanded intumescent material, 25 to 60 dry weight percent of ceramic fibers, 0.5 to 5 dry weight percent of glass fibers having a diameter of less than about 2 microns, and 0.1 to 15 dry weight percent of organic binder, wherein said intumescent sheet material has a cold erosion rate of less than 0.05 grams/hour. The invention also provides catalytic converters and diesel particulate filters containing the sheet material.
Claims17
A catalytic converter comprising:
- a metallic housing, a unitary, solid catalytic element disposed within said housing, and an intumescent sheet material positioned between said catalytic element and said housing, said intumescent material comprising 25 to 60 dry weight percent of at least one unexpanded intumescent material, 25 to 60 dry weight percent of ceramic fibers, 0.5 to 5 dry weight percent of glass fibers having a diameter of less than about 2 microns, and 0.1 to 15 dry weight percent of organic binder, wherein said intumescent sheet material comprises essentially no sepiolite and has a cold erosion rate of less than 0.05 grams/hour.
A diesel particulate filter comprising:
- a metallic casing, a diesel particulate filter element disposed within the casing, and an intumescent sheet material disposed between the diesel particulate filter element and the metallic casing, said intumescent sheet material comprising 25 to 60 dry weight percent of at least one unexpanded intumescent material, 25 to 60 dry weight percent of ceramic fibers, 0.5 to 5 dry weight percent of glass fibers having a diameter of less than about 2 microns, and 0.1 to 15 dry weight percent of organic binder, wherein said intumescent sheet material comprises essentially no sepiolite and has a cold erosion rate of less than 0.05 grams/hour.
A flexible intumescent sheet material comprising 25 to 60 dry weight percent of at least one unexpanded intumescent material, 25 to 60 dry weight percent of ceramic fibers, 0.5 to 5 dry weight percent of glass fibers having a diameter of less than about 2 microns, and 0.1 to 15 dry weight percent of organic binder, wherein said intumescent sheet material comprises essentially no sepiolite and has a cold erosion rate of less than 0.05 grams/hour.
Dependencies are inferred from the claim text.