Expandable graphite intercalation compounds, method for synthesizing them and their use
AssigneeHilti Aktiengesellschaft
InventorsArne Reinheimer, Antje Wenzel
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Abstract
Expandable graphic intercalatable compounds with controllable onset temperatures, methods for their synthesis and their use as intumescing, fire-protection additives for the preparation of flame-retardant compositions.
Claims18
An expandable graphite intercalation compound with controllable expansion onset temperatures, wherein contained, as intercalation components, are at least one intercalatable Lewis acid, optionally in combination with a solvent or solvents, and at least one organic compound, wherein the at least one organic compound is selected from the group consisting of carboxylic acid halides, dicarboxylic acid dihalides, alkyl halides, aryl halides, alkylaryl halides, arylalkyl halide, dialkyl ethers, diaryl ethers, arylalkyl ethers, aliphatic or aromatic glycol ethers, 1,3-diketones, ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, nitrilomethanephosphoric acid, pentasodium triphosphate, and triethanolamine.
A method for the synthesis of expandable graphite intercalation compounds with controllable expansion onset temperatures, wherein contained, as intercalation components, are at least one intercalatable Lewis acid, optionally in combination with a solvent or solvents, and at least one organic compound, wherein the at least one organic compound is selected from the group consisting of carboxylic acid halides, dicarboxylic acid dihalides, alkyl halides, aryl halides, alkylaryl halides, arylalkyl halide, dialkyl ethers, diaryl ethers, arylalkyl ethers, aliphatic or aromatic glycol ethers, 1,3-diketones, ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, nitrilomethanephosphoric acid, pentasodium triphosphate, and triethanolamine, the method comprising the step of carrying out a reaction of graphite and intercalatable Lewis acid in a sealed tube or in a solvent suitable for reaction, whereby an intercalation compound of graphite and the Lewis acid then obtained, optionally after prior isolation, purification and drying, is reacted with the organic compound and the reaction product is isolated, purified and dried.
The method of synthesizing expandable graphite intercalation compounds with controllable expansion onset temperatures, wherein contained, as intercalation components, are at least one intercalatable Lewis acid, optionally in combination with a solvent or solvents, and at least one organic compound, wherein the at least one organic compound is selected from the group consisting of carboxylic acid halides, dicarboxylic acid dihalides, alkyl halides, aryl halides, alkylaryl halides, arylalkyl halide, dialkyl ethers, diaryl ethers, arylalkyl ethers, aliphatic or aromatic glycol ethers, 1,3-diketones, ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentaacetic acid, nitrilomethanephosphoric acid, pentasodium triphosphate, and triethanolamine, the method comprising the step of carrying out a reaction of graphite, intercalatable Lewis acid, and the organic compound in a in a liquid or molten organic compound or in a solvent suitable for this purpose, and isolating, purifying and drying of the reacted product.
Dependencies are inferred from the claim text.