FIRE PROTECTION GLAZING INCLUDING A SECONDARY SEAL HAVING COOLING FIRE PROTECTION PROPERTY

Abstract

Fire protection glazing made of two or more glass panes spaced apart from each other by a spacer. A fire protection material and the spacer are arranged in an intermediate space between the two glass panes. A secondary seal encloses the fire protection material and the spacer in the intermediate space. The secondary seal has a cooling fire protection property and is free of any intumescent fire protection property. Exclusively the fire protection material, the spacer, optionally having an optional spacer attachment for attaching the spacer to the glass pane, and the secondary seal can be arranged in the intermediate space between the two glass panes.

Claims

1. A fire protection glazing made of two or more glass panes spaced apart from each other by a spacer, a fire protection material and the spacer being arranged in an intermediate space between the two glass panes, a secondary seal enclosing the fire protection material and the spacer in the intermediate space, wherein the secondary seal has a cooling fire protection property and is free of any intumescent fire protection property.

2. The fire protection glazing according to claim 1, wherein the secondary seal is an element for immovably attaching the glass panes spaced apart by the spacer to each other.

3. The fire protection glazing according to claim 1, wherein the secondary seal is different from the spacer.

4. The fire protection glazing according to claim 1, wherein the secondary seal is designed as a single element.

5. The fire protection glazing according to claim 1, wherein exclusively the fire protection material, the spacer, having an optional a spacer attachment for attaching the spacer to the glass pane, and the secondary seal are arranged in the intermediate space between the two glass panes.

6. The fire protection glazing according to claim 1, wherein the secondary seal is arranged in a region of the intermediate space adjacent to the end faces of the glass panes.

7. The fire protection glazing according to claim 1, wherein the secondary seal comprises a material which releases gas in case of fire and achieving at least part of the cooling fire protection property of the secondary seal in this manner.

8. The fire protection glazing according to claim 7, wherein the secondary seal releases gas in the event of fire due to decomposition of the material of the secondary seal.

9. The fire protection glazing according to claim 7, wherein the secondary seal releases gas in case of fire due to decomposition of two or more materials of the secondary seal which have different gas release temperatures.

10. The fire protection glazing according to claim 1, wherein the secondary seal comprises a material having endothermic properties which, in the event of fire, absorbs thermal energy thanks to its endothermic properties and in this manner achieves at least part of the cooling fire protection property of the secondary seal.

11. The fire protection glazing according to claim 1, wherein the secondary seal comprises a synergistic material.

12. The fire protection glazing according to claim 1, wherein the secondary seal comprises a fire-suppressing material for reducing a portion of further material in the secondary seal.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0133] The object of the invention is explained in further detail below using a preferred embodiment example shown in the attached drawings. They show, schematically in each case:

[0134] FIG. 1 a section side view through a top part of a fire protection glazing according to the invention;

[0135] FIG. 2 the fire protection glazing from FIG. 1 in the same view, installed in a frame;

[0136] FIG. 3 temperature curve of a test measurement.

DETAILED DESCRIPTION OF THE INVENTION

[0137] Identical parts in the figures are fundamentally referenced with the same reference numeral.

[0138] The designations left, right, top, and bottom relate to the plane of the drawing in the figures.

[0139] FIGS. 1 and 2 show the same embodiment example of the fire protection glazing 1 according to the invention. In both FIGS. 1 and 2, a section side view is shown in each case. In addition, both figures of the fire protection glazing 1 show only the top part. That is, from a perpendicularly positioned fire protection glazing 1 (that is, aligned parallel to the direction of gravity), the top part or, in other words, a top end of the fire protection glazing 1 is shown. Other edge regions of the fire protection glazing 1 are designed similarly. The same applies to the frame 10 in FIG. 2: only the top part of the frame 10 is shown. The other parts are designed analogously.

[0140] A part of the fire protection glazing 1 is shown in FIG. 1. Two glass panes 2 arranged in parallel are spaced apart from each other by a spacer 4 arranged between said panes. A fire protection material 3 is present between the two glass panes 2 and below the spacer 4. A secondary seal 5 is arranged entirely between the two glass panes 2 and above the spacer 4. The secondary seal 5 ends at the top flush with end faces of the two glass panes 2.

[0141] The fire protection glazing from FIG. 1 is shown in FIG. 2 in the same view, but now installed in a frame 10. It can be clearly seen in FIG. 2 that the fire protection properties of the fire protection glazing 1 are particularly significant at the edges thereof (only the top edge is shown here). In the edge region of the fire protection glazing 1, where the secondary seal 5 is present, gas can be released in case of fire between the fire protection glazing 1 and frame 10 for the installed fire protection glazing 1, and have a diluting and cooling effect precisely where weak points are present due to the design. This is particularly the case at the top edge of the fire protection glazing 1, where particularly difficult circumstances prevail due to convection in case of fire (high levels of heat, flames, smoke) and good fire protection properties are particularly advantageous and helpful. Further advantageously, the secondary seal 5 can additionally or alternatively absorb thermal energy here due to endothermic properties, and/or the secondary seal can further advantageously implement a thermally insulating protective layer in addition to the cooling fire protection property.

[0142] In one embodiment, the secondary seal 5 has a weight portion of 50% of Al(OH).sub.3. In the present embodiment, the secondary seal 5 cools due to releasing a gas (more specifically water vapor). The water vapor thereby dilutes hot burning gases and cools the same down in this manner. In addition, due to the diluting, less combustible material (gas, liquids, and solids) is present, also having a cooling effect. At the same time, the high weight portion of Al(OH).sub.3 in the secondary seal 5 can act as a solid-state diluent, if the remainder of the secondary seal 5 has a higher fire risk (flammability or releasing of flammable material).

[0143] FIG. 3 shows the results of a benchmark test. A temperature increase ΔT within 30 minutes was measured on the side of the tested fire protection glazing facing away from the fire, outside the mounting element at a top corner of the fire protection glazing. The corresponding temperature increases are shown in FIG. 3: the temperature increase ΔT (in Kelvin) on the side facing away from the fire (cold side) of the fire protection glazing is shown as a function of time t (in minutes), from which the fire resistance duration can be derived.

[0144] The benchmark test was performed on model CF30 fire protection glazing, mounted in the same mounting element (Janisol II frame system having EPDM seals). The mounting element comprises no additional cooling and/or intumescent element. Only the secondary seal was varied. The fire protection glazing BkR according to the invention comprised an secondary seal made of the materials of the table below, implementing the cooling fire protection effect thereof. Measured values of said fire protection glazing BkR are shown in FIG. 3 as open squares connected by a continuous line.

TABLE-US-00002 Product Weight percent (wt %) Polysulfide by Fenzi 50 Martinal ON-320 50 (Aluminum trihydroxide Al(OH).sub.3 by Huber Martinswerk, Bergheim)

[0145] A BR-Ps secondary seal without any cooling fire protection property was tested for comparison: said BR-Ps secondary seal was made of pure polysulfide. Measured values of the BR-Ps fire protection glazing having the secondary seal made of pure polysulfide are shown in FIG. 3 as open circles connected by a dashed line.

[0146] As can be seen, the temperature increases for the fire protection glazings of all three secondary seals are fairly similar for about 5 minutes. Up to minute 16.5, the BR-Ps secondary seal without cooling fire protection properties has a lower temperature increase. Thereafter, the fire protection glazing BkR having the secondary seal having cooling fire protection properties has substantially lower values of temperature increase. After thirty minutes, the fire protection glazing BkR having the secondary seal according to the invention having cooling fire protection properties has a temperature increase of just 132.5 Kelvin, which is a temperature increase 54.75 Kelvin lower than that of the BR-Ps fire protection glazing having the secondary seal without any cooling fire protection properties.

[0147] The temperature increase for the BR-Ps fire protection glazing after 30 minutes is 187.25 Kelvin. The fire protection glazing having the secondary seal without cooling fire protection properties is thus not able to achieve any fire protection effect according to the EI 30 standard, unless further measures are taken (such as the use of additional intumescent and/or cooling bands). The variant of the fire protection glazing BkR according to the invention having the secondary seal having cooling fire protection properties tested here, in contrast, easily allows a fire protection effect according to the EI 30 standard to be achieved together with the tested mounting element, without additional measures needing to be taken.