Fire retardant composition
AssigneeRadixx/World Ltd.
InventorJohn S. Luckanuck
Life of this patent
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Abstract
The present invention provides a composition for use in forming a fire retardant core for a wooden door by curing and pressing said composition to form a sheet, said composition consisting essentially of (a) 30 to 75% by weight of an inert mineral filler selected from perlite and vermiculite; (b) 10 to 30% by weight of wood chips and (c) from 3 to 15% by weight of a binder which is a mixture of an alkali metal silicate and a curable phenolic resin, at least one of which is present in dry form.
Claims42
A fire retardant core for a wooden door which is a cured pressed sheet of a composition consisting essentially of (a) 30 to 75% by weight of an inert mineral filler selected from perlite and vermiculite;
- (b) 10 to 30% by weight of wood chips and (c) from 3 to 15% by weight of a binder which is a mixture of an alkali metal silicate and a curable phonolic resin, at least one of which is present in dry form.
A composition for use in forming a fire retardant core for a wooden door by curing and pressing said composition to form a sheet, said composition consisting essentially of (a) 30 to 75% by weight of an inert mineral filler selected from perlite and vermiculite;
- (b) 10 to 30% by weight of wood chips and (c) from 3 to 15% by weight of a binder which is a mixture of an alkali metal silicate and a curable phonolic resin, at least one of which is present in dry form.
A method of making a fire retardant core which comprises mixing together wood chips, phenolic resin, alkali metal silicate and at least one mineral filler selected from perlite and vermiculite, so as to produce a composition comprising (a) 30 to 75% by weight of an inert mineral filler selected from perlite and vermiculite;
- (b) 10 to 30% by weight of wood chips and (c) from 3 to 15% by weight of a binder which is a mixture of an alkali metal silicate and a curable phenolic resin, depositing said mixture into trays, passing said trays into a press and pressing said mixture at elevated pressure and temperature efficient to cause said phenolic resin to cure and form said core.
A fire retardant building panel which is a cured and pressed sheet of a composition consisting essentially of (a) 30 to 75% by weight of an inert mineral filler selected from perlite and vermiculite;
- (b) 10 to 30% by weight of wood chips and (c) from 3 to 15% by weight of a binder which is a mixture of an alkali metal silicate and a curable phenolic resin, at least one of which is present in dry form.
Dependencies are inferred from the claim text.