Method for the preparation of vitreous carbon foams

Details Method for the preparation of vitreous carbon foams Method for the preparation of vitreous carbon foams

1975-11-24

1977-05-10

Thomas, Earl C.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

264 291, 264 296, 423448, 423449, C01B 3100, C01B 3102

Patent

active

040228754

ABSTRACT:
A rapid method for forming vitreous carbon foams from flexible polyurethane foams having membranes dividing contiguous cells, which faithfully reproduces the geometry of the uncarbonized polyurethane foams, by infusing the polyurethane foams with substantially unresinified or unpolymerized furfuryl alcohol which is capable of resinification at temperatures above room temperature is described. An important step in the method which permits rapid carbonization without cracking and which is essential to faithful foam geometry reproduction is the substantial removal of the liquid non-infused furfuryl alcohol from the polyurethane foam surfaces after the infusion or swelling step. The carbonized foam is in the form of vitreous, disordered or glassy carbon and is particularly useful for corrosive and/or high temperature applications such as insulation, corrosion resistant chemical processing components and the like.

REFERENCES:
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patent: 3446593 (1969-05-01), Moutaud
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patent: 3778336 (1973-12-01), Adams
patent: 3857913 (1974-12-01), Crow et al.
patent: 3927186 (1975-12-01), Vinton et al.

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