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US 4,093,488 AGranted
Process for the production of building material elements, particularly building boards
AssigneeIsovolta Osterreichische Isolierstoffwerk Aktiengesellschaft
InventorsKurt Kirsch, Volkmar Hilzensauer, Gunther Pflug, Felix Wehrmann, Gerald Maresch
Life of this patent
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Abstract
A process for the production of a building material element comprising spraying granules of vermiculite with an organic binder, prepressing the coated granules into a biscuit and heating and pressing the biscuit in a press to transform it into a building material element.
Claims5
A process for the production of an incombustible building material element having good thermal insulation properties comprising
- (a) spraying by a spraying means over the surface of vermiculite granules, while agitating the granules, a liquid containing an organic binder comprised of a resin mixture or mixed resin having at least one combustible resin component and at least one incombustible nitrogen-containing resin component, wherein the amount of resin, calculated as solid substance, coated on the granules is 2 to 30% by weight, based on the weight of the granules,
- (b) placing the coated granules in a first press and pressing the coated granules without heating to bond them to form a transportable molded product,
- (c) placing the transportable molded product in a second press provided with a heating means, and
- (d) pressing and heating the transportable molded product at an elevated temperature to further bond the granules and organic binder in the molded product to form an incombustible building material element with good thermal insulation properties.
1 more element
Dependencies are inferred from the claim text.