Patent classifications
C
CHEMISTRY; METALLURGY
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C04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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C04B
LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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38/00
Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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C04B38/06
by burning-out added substances; by burning natural expanding materials or by sublimating or melting out added substances
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C04B38/0615
the burned-out substance being a monolitic element having approximately the same dimensions as the final article, e.g. a porous polyurethane sheet or a prepreg obtained by bonding together resin particles
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C04B38/062
the burned-out substance being formed in situ, e.g. by polymerisation of a prepolymer composition containing ceramic powder
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C04B38/0625
involving a foaming step of the burnable material
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