DE1659083A1 - Fireproof building board - Google Patents

Description

üCCono-3 - ^{υ 8} 562.195 - prio

4896)

W.H.Qraee ft Co " New York, N.Y./V.St.. Hamburg, the 2λ. June λ Fireproof building board The present invention relates to refractory building panels.

There is a strong need for better solid and borrowed refractory building boards · In general, the « like building boards made of wood fibers or wood chips, which are processed into boards with binding agents. Since a high degree of fire resistance is often required for building boards, Usually no additives such as borates, phosphates and the like are added to the wood particles «

It is also known to be defoliated because of its vermiculite great warmth and cheapness on the upper to apply surface of such building boards.

However, such wood fiber boards or chipboard made of defoliated "Vernlkulit" do not have the necessary properties Flake strength and aeohanic strength. Defoliated Veraiculite can be mixed with wood particles very easily.

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mlsohen and the forwarding of burns takes place via the interconnected wooden parts. Try to get the carbon particles to be covered with finely ground, defoliated vermiculite and thus the wood lohen compared to a further Burn to isolate have proven impractical and uneconomical exposed. Since the defoliated vermiculite itself has a very low strength »you only get it very weak building boards.

The object of the present invention is to overcome the difficulties mentioned above and the creation of a refractory building panel »

To solve this problem, according to the invention, a Building board suggested «which from a mixture of Holstellohen and one non-expanded, expandable Mineral ore, e.g. vermiculite or pearl ore, consists of connected with a suitable binding agent.

The expandable mineral is preferably vermiculite or perlite, but other types of ore can also be used will. The commercially available vermiculite is traded in various qualities, namely type No. * 1 to 5 ». The size of the U.S. Standard classification is as follows Type It 3 to 12, Type 2 t 8 to 16, Type? T 12 to 40, Type «4t 30 to 70 and Type 5t 40. In the present case

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In accordance with the invention, all types of equipment can be used. With the designation "unexpanded vermiculite" designated an expandable or exfoliated ore "

The Holztellohen can take the form of shavings, flakes, abrasion, splinters or in the form of sawdust, which is produced by grinding, shredding or cutting up debarked wood.

The ratio of unexpandlertem Vennikuliterz to wood fibers m hSngt on the desired uses. The higher the vermiculite content, the better the heat and fire resistance, but the final product is correspondingly weaker. If high strength but high fire resistance is required, higher vermiculite to wood ratios can be used. The vermiculite ore content can range from IC to 80 ow based on the weight of the wood, but 25 % ore and 75 % wood are suitable for most purposes.

The AVt and amount of binder depend on the subject Purpose for which the product is to be used »

In the present invention, the usual binders are used used, which are used in the production of press plates, namely urea formaldehyde, fhenol formaldehyde and to a lesser extent melamine HCHO and other aminoplasts. Other additives, such as paraffin-based wax emulsions, can

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be added to the vermiculite / wood fiber mixture if a other impregnation or sizing is required.

The refractory panels according to the invention can be used for numerous Purposes «ζ · Β · as wall panels, as sound insulation«, Thermal insulation, as decorative wall panels, as Tlschabdeoleung, as Daohmaterlal, as insulation panels for supply lines «as sound-absorbing coverings, ice back wall for P Veneers, as a material for doors, pads and insulation in safes.

In a method for producing the invention Building board is the exfoliated vermiculite, which is coated with an adhesive, on the bottom of a suitable form spread out. Then a layer of unexpanded vermiculite ore, which is also coated with an adhesive, is applied to the defoliated venoiculite ore . spread out and an oeraisoh made from unexpanded vermiculite * Ore and wood shavings and a binding agent is spread on the layer of non-expanded verroiculite ore to make a Kind of forming mat. If necessary, after the completion of this mat made of wood chips and Venr.ikiJ.Uterz, another layer can be applied made of unexpanded "vermilite ore, which with an adhesive is coated, placed on this mat layer and a Another layer of defoliated vermiculite, which is also coated with an adhesive, looks on the vermiculite top be applied. This layer structure is

10 9 8 U / 0 2 5 L,

then in the usual way under heat and pressure to form a board ▼, whereby a pre-oil plate forms, which has fireproof soles made of defoliated vermiculite and vermiculite ore on both sides, and which has a middle layer of wood chips and vericulite ore. An example of such a coated press plate is shown in the accompanying drawing. The press plate 10 consists of two outer layers 11 and 12 of defoliated Termikullt
Layers 13 and 14 of unexpanded vermiculite and a middle layer 15 aiii; Vermiculiters and KolsspSnen and binders *

The invention is to be explained in more detail below with the aid of examples

example 1

1500 g of wood chips with a dimension of 1.6 × 6.55 mm and a moisture content of 7.2 56 and 500 g of an unexpanded vermilite ore type 3 were mixed with one another. While mixing, 41.5% of a wax emulsion with 45% paraffin was added in a fine stream to the mixture. Then 2JO g of urea-formaldehyde adhesive with 65 % pesticides were added. The moisture content of the
Mixture was 10.5 pounds

1760 g of this mixture were evenly distributed on the bottom of a square shape with an edge length of 35.6 om »

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spread and formed a layer about 12.7 cm high. These Layer was then placed in a cold press to about 3 »8 cm susamnengepreet

This sheet or mat was taken out of the mold and placed at 149 ° C under a pressure of 35 tons to a thickness of 1.9 cm compressed. The pressure was then reduced to 12 t and left for 3 minutes. A 1.9 cm thick plate was obtained. This plate had excellent fire resistance and the Particles of flake ore expanded upon contact with one Flame or intense heat and thus prevented the fire from spreading

Example 2

A plate was produced according to Example 1, however Now unexpanded perlite was used instead of unexpanded vermiculite ore. This record showed also excellent fire resistance and the pearlite particles stretched on contact with a flame or in intense heat and prevented the fire from spreading

Example 3

Two panels were made by adding 3000 g of wood chips with a moisture content of 7.2 # and 1000 g no expanded vermiculite type 3 were mixed together.

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During the meowing, 8? 45 pounds of paraffin waone emulsion was sprayed onto the circulated hat. Thereafter, 460 g of urea formaldehyde resin were added as an adhesive with a 65 % content of pesticides to the mixture of Kolsspänen and Vermlkullterz. The total water content of the mixture was £ 10

400 g of expanded vermiculite ore type 2 were 74 g Urea-formaldehyde adhesive and 9 g of a 45 $ paraffin ™ waohsemuleion mixed.

200 g of the product consisting of vermiculite ore and urea formaldehyde were spread evenly on the bottom of a rectangular shape with an edge length of 35 * 6 μm and was at a height of about 12.7 mm. 1725 g of the mixture of wood chips and vermiculite ore were evenly applied to the surface of the ore layer and formed a mat about 12.7 cm thick. 200 g of the mixture from ä Vermikuliterz and resin were uniformly applied to the mat at a height of 12.7 mm. These three layers were then pressed together to about two inches in a cold press.

This layer structure was ^{pressed together for 5 minutes at ISO 0} under a pressure of 35 t to form a 1.9 cm thick plate, the pressure dropping to 12 t; this plate was left at this pressure for an additional 3 minutes. One received a

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1.9 ow thick board.

For comparison, a second plate was made by 4000 g wood chips, 8? g of a 45% igeji P & raffin wax emulsion and 460 g of a 65% urea-formaldehyde solution were ο 400 g of flaked vermiculite type 2 were with 74 g urea-formaldehyde resin as an adhesive and with 9 g of a wax nileion treated.

200 g of the venous ore / urea-formaldehyde-resin mixture became evenly on the beden of the above-mentioned form Then spread to a height of 12.7 mm, 1725 g the resin-treated wood chips evenly onto them Vermiculitschloht spread out at a height of about 3.2.7 cm. A further 200 g of the vermiculite ore were then added piled up to a height of 12.7 mm. The entire Layered structure was measured in a cold press to about 5.1 cm compressed and then 5 minutes at 177 ° C under one Pressure of 300 tons pressed, with a 1.9 µm thick plate was obtained. The pressure dropped to 12 tons and was left there for a further 3 minutes. The final press plate was 1.9 cm thick.

The difference between these two press plates was that the first plate had a middle layer of wood chips and contained non-expanded vermiculite ore and

BAD OBiGiNAL

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superficial layers of exfoliated vermiculite The second plate had a core made only of wood chips and resin with corresponding surface layers from exfoliated vermiculite "

Both plates were heated with a welding torch. In the case of the plate 1 according to the invention, there was no burning and

no forwarding of the fire. After the plate was heated for 3 minutes from a page in this way M was the other side remained cool and could be handled exposed · Damage to the flame

Surface was only superficial and was on the direct flame

position limited

The second press plate, which corresponds to the plates known up to now, "began to char, eu burn and then began to burn 80 seconds of flame contact to smoke.

These experiments clearly show the remarkable and unexpected flame retardant properties of the invention Press plates.

Example 4

3000 g of wood chips and 1000 g of unexpanded vermiculated type were mixed together and with 82 g of a 45J6igen Sprayed wax emulsion. To this mixture was 460 g

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• Ines glue containing 65% urine-based fon »ldehyde added. 2000 grams of unexpanded # 4 vermiculite became with 286 g of a 6% urea formaldehyde resin adhesive and mixed with 4.15 g of a paraffin wax emulsion «

A plate was then made by spreading 745 g of the mixture of adhesive-coated ore on the bottom of a rectangular shape with 25.6 cm edge lengths, after which I 600 g of the mixture of wood pulp and vermiculite were applied, followed by another layer of 745 g of vermiculite and formaldehyde resin was applied. These two layers were then pressed together in a cold press * to a thickness of 5 08 cm, then j5 minutes at 150 ⁰ C and a pressure of 35 t of a plate of 1.9 cm thick pressed. The pressure was then released to 12 tons for an additional 3 minutes, yielding a 1.9 cm dioke plate.

It became a second plate corresponding to the first plate manufactured, but now this one surface layer from vermiculite ore contained only on one side. Both plates were heated with an acetylene blower and showed » Individual fire and heat resistance.

Example 5 In order to achieve a particularly high level of fire resistance BADORIQiNAL

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one suitable for ships, plug-in items, safes and the like Special preprint plate made.

A five-soled plate was produced which in the Middle layer contained a core of 1200 g of wood chips and 400 g of expanded vermiculite ore type 5 mixed with 128 g of urea-formaldehyde resin and 16 g of paraffin wax. on on both sides of this core layer was a layer of unexpanded vermiculite no Ore, 24 g urea-formaldehyde resin and 3 g paraffin wax duration. The outer layers consisted of defoliated vermiculite and contained 200 g vermiculite, 16 g urea « Formaldehyde resin and 2 g paraffin wax. This plate was made as in the previous examples and is shown in FIG reproduced in the enclosed paper.

This plate was heated for 10 minutes with a Azetylengebläse and showed only small, narrowly limited phenomena, the surface opposite to the blower located only took a temperature of 65 to 71 ⁰ C at. There was no burning * smoking or charring on the flame side.

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Claims (5)

(U.8. 562,195 - prio 1,7,6t gases IO628 »4896) Hew York. N.Y./USA Hamburg * June 21, 1967 patent claims; 1. Building board consisting of with a binding agent to each other associated mineral and wood parts, characterized that the mineral parts expanded bare mineral ore parts, such as vermailite or perlite, which is merged with the wood particles and connected by a suitable binding agent 2. Building board according to claim 1 *, characterized in that the unexpanded, expandable mineral ore and the mixed wood particles are arranged to form a flat structure and that at least one? » these pages of the A layer of compressed, defoliated vermiculite is applied unitarily. 3. Building board according to claim 1, characterized in that the unexpanded, expar.dbarena mineral ore and the mixed Kolztellchen to a F? the surface is appropriate and that a layer of unexpanded vermiculite is arranged on at least one side ", 1098 '././ 0.T./. 4. Building board according to claim I to 3, characterized in that the unexpanded, expandable mineral ore and the mixed HoIs are arranged to form a planar structure and that two layers are arranged on at least one side of this planar structure, of which the first layer is adjacent to the planar structure consists of unexpanded vermiculite and is firmly connected to this surface structure μ ₅ and that the second layer consists of defoliated vermiculite, which is firmly connected to the first layer 5. Process for the production of a building board, wherein mineral and wood particles are connected to one another with a binding agent «characterized by the fact that one Qemlsch made from defoliated vermiculite and synthetic Spreads resin on the bottom half of a press in which the plate is made, and one on this mixture ™ a mat made of wood chips and non-expanded vermiculite ore, mixed with a synthetic binder, made of « spreads, and that another layer of defoliated vermiculite and synthetic ** arz on this mat from » and that these layers are exposed to pressure and heat. uetco 109844/0254 Blank page