Use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production
AssigneeHilti Aktiengesellschaft
InventorsArne Reinheimer, Antje Wenzel, Herbert Muenzenberger
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Abstract
The method of at least one thermally expandable graphite intercalation compound, containing A) a least one metal halide of at least one of the elements Fe, Al, Sb, Zn, Y, Cr and Ni and B) at least one nitroalkane of the general formula CH3(CH2)nNO2, in which n is a whole number from 0 to 10, as well as its structural isomers or mixtures, as intumescing, fire-protection additive in polymer matrices for producing intumescing fire-protective seals for through holes, wall bushings and other openings in walls, floors and/or ceilings of buildings, as well as a method for preparing the thermally expandable graphite-intercalation compounds used.
Claims24
A method of providing polymer matrices for producing intumescing fire-protective seals for through holes, wall bushings and other openings in wall, floors and/or ceilings of buildings, which comprises introducing a fire protection additive into a polymer matrix, wherein said additive is at least one thermally expandable graphite intercalation compound consisting of graphite and of the following intercalate compounds A), B) and C);
- A) at least one hydrate of at least one of the metal halides selected from the group consisting of FeCl3, AlCl3, SbCl5, YCl3, CrCl3 and NiCl2,
- B) at least one nitroalkane of the general formula CH3(CH2)nNO2, in which n is a whole number from 0 to 10, as well as its structural isomers or mixtures thereof, and
- C) at least one acid selected from the group consisting of sulfuric acid, acetic acid and nitric acid.
Dependencies are inferred from the claim text.