Fireproof covering

Claim 2

A fireproof covering structure for protecting heat-sensitive material and structures, said covering comprising: pre-shaped mineral wool components, molded with a binder to be rigid, attachable and substantially self-supporting in the form of upper and lower rigid component members, the upper and lower component members together including at least two bent portions, such that a sealed trough may be formed therebetween for surrounding the heat-sensitive material and structure; and, a fireproof coating at least on the outside of the rigid mineral wool components, the coating progressively sintering onto the surface of the rigid mineral wool components under fire conditions and protecting the components as the binder progressively decomposes, whereby heat-sensitive material and structure can be protected from fire conditions for extended periods of time.

Claim 3

A fireproof covering according to claim 1, wherein at least some of the pre-shaped mineral wool components are molded into rigid forms having a bend in at least one direction.

Claim 4

A fireproof covering according to claim 1, wherein the mineral wool components are molded by compression.

Claim 5

A fireproof covering according to claim 1, wherein the mineral wool components comprise gas and liquid impermeable layers.

Claim 6

A fireproof covering according to claim 4, wherein the impermeable layer is a metal foil.

Claim 7

A fireproof covering according to claim 4, wherein the impermeable layer is a heat-resistant adhesive between overlapping layers of the mineral wool components.

Claim 8

A fireproof covering according to claim 1, wherein the lower component members each have at least two bent portions, and the upper component members are substantially flat.

Claim 9

A fireproof covering according to claim 7, wherein at least one of the upper and lower component members comprises at least two layers of pre-shaped mineral wool component members.

Claim 10

A fireproof covering according to claim 8, wherein the at least two layers are joined by a gas and liquid impermeable adhesive layer.

Claim 11

A fireproof covering according to claim 7, comprising a plurality of the mineral wool components arranged end to end to form an elongated, insulated duct.

Claim 12

A fireproof covering according to claim 10, wherein the mineral wool components are arranged to form inner and outer insulating layers.

Claim 13

A fireproof covering according to claim 11, wherein the seams between adjacent mineral wool components arranged in the outer layer are staggered with respect to the seams of adjacent mineral wool components of the inner layer, enhancing mechanical strength and heat impermeability.

Claim 14

A fireproof covering according to claim 1, wherein the molded mineral wool components have a bulk density in the range of approximately 200 kg/m 3 to 700 kg/m 3 .

Claim 15

A fireproof covering according to claim 1, wherein the binder for the mineral wool components comprises a formaldehyde resin in an amount in the range of 1.5% to 8%, by weight, chosen from the group consisting of phenol formaldehyde resin, urea formaldehyde resin and melamine formaldehyde resin.

Claim 16

A fireproof covering according to claim 1, wherein mating surfaces of adjacent mineral wool components are joined by a not-readily flammable adhesive coating containing inorganic fibers with a melting point in the range of approximately 700° C. to 800° C. and being free of antimony compounds.

Claim 17

A fireproof coating according to claim 15, wherein the adhesive coating comprises; 1% to 25% by weight of inorganic, incombustible glass fibers; 10% to 50% by weight of a terpolymer binder; 2% to 20% by weight of inert, inorganic filling material; 5% to 15% by weight of a plasticizer; and 35% to 70% by weight of inorganic flame retarder.

Claim 18

A fireproof covering according to claim 1, further comprising a moisture-proof intumescent putty for sealing joints between adjacent mineral wool components, which forms a coal-foam coating under fire conditions.

Claim 19

A fireproof covering according to claim 1, wherein the molded mineral wool components are pre-shaped to forms which can be nested inside one another without substantial gaps there between, facilitating storage and transportation of the components.

Claim 20

A fireproof covering according to claim 1, further comprising supporting structural members for the mineral wool components.

Claim 21

A fireproof covering according to claim 1, wherein at least one molded mineral wool component has at least one 90° angle in cross section.

Claim 22

A fireproof covering according to claim 1, wherein at least one molded mineral wool component has an L-shaped cross section.

Claim 23

A fireproof covering according to claim 1, wherein at least one molded mineral wool component has a U-shaped cross section.

Claim 24

A fireproof covering according to claim 1, wherein at least one molded mineral wool component is made from a flat mat of higher thickness and lower density by heat compressing and simultaneously molding to the desired shape.

Claim 25

A fireproof covering according to claim 1, comprising at least two layers of molded mineral wool components of different density.

Claim 26

A fireproof covering according to claim 24, wherein different layers are of different thickness.

Claim 27

A fireproof covering according to claim 24, wherein the layer with the higher density has a lower thickness.

Claim 28

A fireproof covering according to claim 24, wherein the layer with the higher density has a thickness of 10 to 15 mm and the layer of the lower thickness has a thickness of 30 to 50 mm.

Claim 29

A fireproof covering structure for protecting heat-sensitive material and structures, said covering comprising: pre-shaped mineral wool components, molded with a binder to be rigid, attachable and substantially self-supporting, the mineral wool components having rigid flange-like borders extending outwardly at an angle, the borders being rigidly attachable along their lengths for connecting coextensive lengths of the components to one another into an enclosure for surrounding the heat-sensitive material and structures; and, a fireproof coating at least on the outside of the rigid mineral wool components, the coating progressively sintering onto the surface of the rigid mineral wool components under fire conditions and protecting the components as the binder progressively decomposes, whereby heat-sensitive material and structure can be protected from fire conditions for extended periods of time.

Claim 30

A fireproof covering structure for protecting heat-sensitive material and structures, said covering comprising: pre-shaped mineral wool components, molded with a binder to be rigid, attachable and substantially self-supporting, the mineral wool components having rigid flange-like borders extending outwardly at an angle, the borders being rigidly attachable along their lengths for connecting coextensive lengths of the components to one another into an enclosure for surrounding the heat-sensitive material and structures; and, a fireproof coating at least on the outside of the rigid mineral wool components, the coating progressively sintering onto the surface of the rigid mineral wool components under fire conditions and protecting the components as the binder progressively decomposes, whereby heat-sensitive material and structure can be protected from fire conditions for extended periods of time.

Claim 31

A fireproof covering according to claim 28, further comprising a plurality of clips for connecting the components to one another, by pressably engaging the flange-like borders of connected components.

Claim 32

A fireproof covering according to claim 28, wherein the components are connected to one another by rails of U-shaped cross section attached to the flange-like borders of components rigidly connected to one another end to end.