DE202009018204U1 - Integrated glass construction - Google Patents

Abstract

Integrated glass structure comprising
A) a dimensionally stable under the stress of a permanent surface pressure laminated glass pane, containing
a1) a first glass pane,
a2) a layer of a partially neutralized ionomer resin containing in copolymerized form ethylene and / or propylene and at least one alpha, beta-unsaturated carboxylic acid having 3 to 8 carbon atoms in the molecule, and
a3) a second glass pane, as well
B) at least one clamping device which exerts a permanent surface pressure from both sides on the laminated glass pane A) and fixes the laminated glass pane A) solely by the constant surface pressure.

Description

The present invention relates to a new integrated glass structure comprising a laminated glass and at least one clamping device.

Glass structures with safety glass are known from the prior art. These contain essentially ESG (toughened safety glass) or VG (laminated glass) and LSG (laminated safety glass). In the process, ESG is produced by a specific process in which the glass is pre-stressed. In the case of VG or VSG, a particular stability is achieved by providing organic intermediate layers, in particular films, between two glass layers, which stabilize the composite structure.

Such glass structures are widely used, for example, for fall-arresting, burglary-resistant or hurricanesafe windows and building glazings.

The composite systems are preferably used, as they still show some residual capacity even after damage, whereas ESG decays above a certain load limit into many small fragments.

Conventional and known composite structures achieve their function by combining films of polyvinyl butyral (PVB) or polyurethane (PU), ethyl vinyl acetate (EVA) or polycarbonate (PC) and glass.

Illustrative examples of the prior art are EP 0 748 687 A2 . US 5,778,629 . US 6,101,783 . US 5,960,606 and US Pat. No. 6,675,550 B1 , However, the usual and known glazings described therein are not clampable, but must be secured by other holding mechanisms, such as by framing and gluing.

From the international patent application WO 2006/034346 A1 are known sound insulating laminated glass panes containing a film laminate between the glass sheets. The film laminate may consist Plus ^® from DuPont, a polyethylene terephthalate film and a polyvinyl butyral film (PVB film), for example from an ionomer such as SentryGlas. It is not known if these sound insulating laminated glass panes can be securely fastened by means of clamping devices.

From the international patent application WO 2005/042246 A1 are known infrared radiation blocking laminated glass panes containing a film laminate between the glass sheets. The film laminate may comprise for example a multilayer infrared reflecting film which Plus ^® DuPont SentryGlas of ionomer as is covered on both sides, are made. It is also not known if these infrared blocking laminates can be securely fastened using clamps.

From the international patent application WO 2004/048736 A1 Laminated glass panes are known, which are suitable for the production of static and / or dynamically loaded glass structures, such as overhead glazing for roofs, glass walls, facades or glass doors. These laminated glass panes contain PVB films. They are mounted by means of clamping and point fasteners, the clamping parts or clamping jaws are connected by threads, which are passed through holes in the laminated glass pane. A bracket alone by surface pressure is not possible. The laminated glass panes are connected to a further glass pane via a cast resin layer in which printed conductors are embedded. The clamping devices are designed such that they only exert pressure on the laminated glass panes. However, these known integrated glass structures are not sufficiently burglar resistant.

A general problem of conventional and known glazings based on laminated safety glass is that the pressure exerted by the clamping device on the glazing causes cold flow of the interlayer or foil, which leads to a reduction in the glazing layer thickness, which causes that the glass is no longer firmly clamped, but only loosely seated in the clamping devices. However, this is not acceptable for safety reasons.

This effect causes, for example in all-glass doors a gradual slipping of the disc, which ultimately leads to jamming of the door. The door is then no longer functional. This adverse behavior can be accelerated by higher temperatures, as they prevail on hot summer days become. This effect is particularly critical when people who are in a room with such a jammed door, the room can not leave in an emergency.

In order to avoid these problems, the manufacturers of all-glass doors based on laminated safety glass panes have to resort to holding devices which require through holes. However, the production of such bores is technically complex because particularly close tolerances must be maintained. In addition, the hardware manufacturers must provide larger and more expensive hardware. Thus, all-glass doors based on laminated safety glass panes are uneconomical overall.

Although the use of tempered safety glass could alleviate these problems to some extent, all-glass safety glass doors can not meet the burglar resistance insurances requirements because such glass doors disintegrate into many small fragments above a certain load limit.

It is accordingly an object of the present invention to provide a new integrated glass structure which is intended to be burglary-resistant, it being possible to fasten the laminated glass by clamping devices which no longer require bores through the laminated glass pane but through the laminated glass pane alone Keep surface pressure.

The respective clamping devices should be less expensive than the holding devices that are necessary for glass structures with through holes.

The new integrated glass structure should be particularly suitable for the production of stable, burglar-resistant, statically and / or dynamically loaded glass structures, in particular overhead glazing for roofs, glass walls, facades or glass doors, especially burglar resistant all-glass doors.

The windows of the new burglary-resistant all-glass doors should not slip off even at higher temperatures, so that jamming of the all-glass doors is avoided.

Last but not least, the new burglar-resistant all-glass doors should meet the requirements of insurance companies for burglar resistance.

• A) eine bei der Belastung durch eine ständige Flächenpressung formstabile Verbundglasscheibe, enthaltend a1) eine erste Glasscheibe, a2) eine Schicht aus einem partiell neutralisierten Ionomerharz, das Ethylen und/oder Propylen und mindestens eine alpha, beta-ungesättigte Carbonsäure mit 3 bis 8 Kohlenstoffatomen im Molekül einpolymerisiert enthält, und a3) eine zweite Glasscheibe, sowie
• B) mindestens eine Klemmvorrichtung, die von außen auf die Verbundglasscheibe A) beidseitig eine ständige Flächenpressung ausübt und die Verbundglasscheibe A) alleine durch die ständige Flächenpressung fixiert.

Accordingly, a new integrated glass structure has been found comprising

• A) a dimensionally stable laminated glass sheet which is dimensionally stable under stress by continuous surface pressure, comprising a1) a first glass sheet, a2) a partially neutralized ionomer resin layer, ethylene and / or propylene and at least one alpha, beta-unsaturated carboxylic acid having 3 to 8 carbon atoms polymerized in the molecule, and a3) a second glass pane, as well
• B) at least one clamping device which exerts a permanent surface pressure from both sides on the laminated glass pane A) and fixes the laminated glass pane A) solely by the constant surface pressure.

In the following, the new integrated glass structure is referred to as "inventive glass structure".

It was surprising that the glass structure according to the invention was burglar resistant.

It was also surprising that the glass structure according to the invention made it possible to fix the laminated glass solely by clamping devices which no longer required bores through the laminated glass panes, but which held the laminated glass panes solely by surface pressure. In this case, the clamps were less expensive than the fixtures, which were necessary for through-hole glass structures, which was another advantage.

The glass structure according to the invention was particularly suitable for the production of stable, burglar-resistant, statically and / or dynamically loaded glass structures, in particular overhead glazing for roofs, glass walls, facades or glass doors, especially burglar resistant all-glass doors.

The panes of burglar-resistant all-glass doors according to the invention did not slip even at higher temperatures, so that jamming of the all-glass doors could be avoided.

Not least, the burglary-resistant all-glass doors according to the invention met the requirements of insurance against burglar resistance.

In the context of the present invention, all quantities are, unless stated otherwise, to be understood as weight data.

In the context of the present invention, the term "room temperature" means a temperature of 23 ° C. Temperatures are, unless otherwise stated, in degrees Celsius (° C).

Unless otherwise stated, the reactions or process steps given are carried out at normal pressure (atmospheric pressure).

The term (meth) acrylic is intended to include in the context of the present invention both methacrylic and acrylic or mixtures of both.

The first essential component of the glass structure according to the invention is the laminated glass pane A).

The laminated glass pane A) is dimensionally stable under the conditions of surface pressure. This means that it has no or only a very small reduction in its thickness compared to the thickness before the load at a bilateral, prolonged continuous pressure load or surface pressure by a clamping device B) after the discharge. Preferably, after a continuous surface pressure of 4.5 MPa for 72 hours and subsequent relief at the loaded point, it showed a reduction in the thickness <0.5%, preferably <0.4%, particularly preferably <0.3% and in particular <0 , 2% of the original thickness before loading.

The laminated glass pane A) contains the glass panes a1) and a3).

As glass panes a1) and a3), all glasses come into consideration, as they are usually used for the production of laminated glass, in particular of laminated safety glass. Preferably, float glass and tempered and partially tempered float glass are used.

Float glass, is a flat glass manufactured by means of the float glass process. Both methods for the production of the float glass and the exact meaning of this term are known in the art and need not be further elaborated here. Semi-tempered and tempered float glass is commonly used to produce single-pane safety glass. In particular, alkali-lime-hard glass or soda-lime glass become after DIN EN 572-1 used. Further examples of suitable glasses are described in Römpp-Online 2008 under the keywords »glass«, »tempered glass« or »safety glass« or are from the German translation of the European patent EP 0 847 965 B1 with the file number DE 697 31 2 168 T2 , Page 8, paragraph [0053].

In the context of the present invention, any glass thicknesses can be used, but preferably the standard thicknesses 2, 3, 4, 5, 6, 8, 10, 12, 15, 19 and 25 mm are used. In this case, the two glass layers may have the same or different thicknesses or thicknesses, preferably the same thickness.

The laminated glass pane A) also contains a layer a2), in particular a film a2), of a partially neutralized ionomer resin which copolymerizes ethylene and / or propylene, in particular ethylene, and at least one alpha, beta-unsaturated carboxylic acid having 3 to 8 carbon atoms in the molecule contains.

The degree of neutralization of the ionomer resin can vary widely. It is preferably from 10 to 90 mol%, preferably from 15 to 45 mol% and in particular from 20 to 35 mol% of the carboxyl groups present.

As the neutralizing agent, any conventional and known organic and inorganic bases can be used as long as the resulting ionomer resin is dimensionally stable. Preference is given to using inorganic bases, preferably alkali metal hydroxides and alkaline earth metal hydroxides, particularly preferably alkali metal hydroxides, very particularly preferably sodium and potassium hydroxides and, in particular, sodium hydroxide.

Examples of suitable alpha, beta-unsaturated carboxylic acids are (meth) acrylic acid and ethacrylic acid, especially methacrylic acid.

Thus, the ionomer resin most preferably used is the water-soluble sodium salt of a copolymer of ethylene and methacrylic acid.

The ratio of the copolymerized comonomers can vary widely and are thus perfectly adapted to the requirements of the individual case. Preferably, the ionomer resins contain, based in each case on their total amount, 20 to 30 wt .-% of copolymerized alpha, beta-unsaturated carboxylic acids.

The layer or the film a2) is dimensionally stable. This means that it does not tend to creep or flow cold for a longer time continuous surface pressure and also shows no other relaxation phenomena.

The layer or film a2) may have a thickness of 0.2 to 15 mm. Preference is given to thicknesses of 0.3 to 3 mm, in particular of 1 to 2 mm.

Examples of such layers and films a2) are from the international patent applications WO 2005/042246 A1 . WO 2006/034346 A1 and WO 2007/149082 A1 known. They are sold for example by DuPont under the brand SentryGlas Plus ^® .

The laminated glass pane A) to be used according to the invention preferably has no depressions, edge indentations and / or passages or bores for receiving clamping devices.

The further essential component of the glass structure according to the invention is at least one clamping device B).

The clamping devices B) exert on the laminated glass panes A) a permanent surface pressure sufficient to allow the laminated glass panes A) to be durable, d. H. secure for several years, preferably during the entire service life of the glass structures according to the invention.

Clamping devices B) which are suitable for the purposes of the present invention are customary and known clamping fittings or clamp fasteners, as used for fastening glass panes, in particular tempered safety glass panes (ESG), in glass door installations. Such clamping devices B) are manufactured and sold, for example, by Dorma.

The glass structure of the invention can be prepared by conventional and known methods.

The glass structures of the invention are used in the context of the inventive use with particular advantage for the production of statically and / or dynamically loaded glass structures, preferably of overhead glazing for roofs, glass walls, facades or glass doors.

They are preferably used for the production of burglary-resistant and / or ornamental glazings. Particularly preferred is the use as burglary-resistant glazings.

Very particular advantages result when the glass structures according to the invention are used for window panes, glass doors, balustrades, parapet glazing, overhead glazing, glass roofs, skylights or walk-in glass.

In particular, the glass structures according to the invention are used for the production of novel burglary-resistant all-glass doors.

It is possible to fasten the laminated glass panes A) in the glass structures according to the invention in addition to the clamping devices B) via other conventional mechanisms than the permanent surface pressure.

It is highly preferred if the laminated glass panes A) of the glass structures according to the invention according to the present invention are held only via the clamping devices B) and no further holding mechanisms are used.

In a variant of the present invention, the layer structure of the glass structures according to the invention can be extended by further layers a2) and glass panes a1) and / or a3). So it is z. B. also possible to realize inventive glass structures of the construction a1 / a2 / a3 / a2 / a3 or a1 / a2 / a3 / a2 / a1 / a2 / a3.

The glass structures according to the invention may also comprise further, different layers a4). So can -. B. color reflection films, UV or IR reflection films, tinting films, heat insulation or absorption films, electrically conductive layers, etc. be part of the glass structure according to the invention. The layers a4) can be located on the outside and / or inside of the glass structures according to the invention.

The glass structures of the present invention of the present invention are thinner and lighter than conventional glass structures using polyvinyl butyral as an intermediate layer. They allow clamping in compliance with the values required by the hardware manufacturers. They can be shaped. In particular, they may be curved in one or more spatial directions. In this case, according to the invention, very narrow radii of curvature can be achieved. This is particularly advantageous for such applications where a certain design aesthetic is to be used.

The glass structure according to the invention is based on the 1 exemplified.

The 1 shows a cross section through the glass structure according to the invention. In the 1 it is a schematic representation intended to illustrate the principle of the invention. The schematic therefore need not be true to scale. The illustrated proportions therefore do not have to correspond to the proportions used in practice of the invention in practice.

In the 1 the reference signs have the following meaning:

LIST OF REFERENCE NUMBERS

1

integrated glass structure,

2

Laminated safety glass pane,

3

Float glass,

4

Layer of a partially neutralized ionomer resin,

5

Float glass pane and

6

Clamping device.

The float glass panes ( 3 ) and ( 5 ) of the integrated glass structure ( 1 ) may have different thicknesses. Preferably, they have the same thickness. Float glass panes ( 3 ) and ( 5 ) of the standard thicknesses 2, 3, 4, 5, 6, 8, 10, 12, 15, 19 and 25 mm, for example 6 mm.

The thickness of the layer ( 4 ) from a partially neutralized ionomer resin may also vary. Preferably, it is 0.2 to 15 mm. Preference is given to thicknesses of 0.3 to 3 mm, in particular of 1 to 2 mm, for example 1.52 mm. For example, the layer ( 4 ) From a film which is marketed by DuPont under the trademark SentryGlas Plus ^® manufactured.

As clamping device ( 6 ), for example, a clamping device from Dorma is used, which serves to attach a single-pane safety glass (ESG) in a glass door system. The clamping devices ( 6 ) exerts a permanent surface pressure on the laminated safety glass pane ( 2 ), which is sufficient to allow the laminated safety glass ( 2 ) in the integrated glass structure ( 1 ) secure.

The laminated safety glass pane ( 2 ) is dimensionally stable and has after the two-sided, prolonged continuous, constant pressure load or surface pressure by the clamping device ( 6 ) after the discharge no or only a very small reduction in its thickness compared to the thickness before the load on. Preferably, after a continuous surface pressure of 4.5 MPa for 72 hours and subsequent relief at the loaded point, it showed a reduction in the thickness <0.5%, preferably <0.4%, particularly preferably <0.3% and in particular <0 , 2% of the original thickness before loading.

Example and comparative experiment

example 1

The production of a laminated safety glass pane A) of construction a1 / a2 / a3 and the determination of its dimensional stability

It was a laminated safety glass A) in a conventional manner by bonding a float glass a1) a standard thickness of 6 mm, a SentryGlas Plus ^® a2) DuPont the thickness of 1.52 mm (SGP) and a float glass a3) a standard thickness made of 6 mm.

The dimensional stability of the laminated safety glass pane A) was determined in the following manner by clamping tests.

The measuring points 1 to 5 (see Table 1) were located along the edge of the laminated safety glass pane A) at a distance of 1 cm from the edge. The measuring points 1 to 5 were each 5 cm apart. The respective thickness of the laminated safety glass pane A) was measured at measuring points 1 to 5 (see Table 1: Measurement before 1st load). Subsequently, 1 to 5 terminals were attached to the measuring points and a constant surface pressure of 4.5 MPa was set with a torque wrench. The surface pressure was maintained for 72 hours. Subsequently, the clamps were released and the respective thickness of the laminated safety glass pane A) was measured at measuring points 1 to 5 (see Table 1: Measurement after 1st load). The difference between the thicknesses before and after the 1st load was calculated for each measuring point 1 to 5 (see Table 1: Difference to origin). Subsequently, the laminated safety glass pane A) was loaded a second time in the same way at the measuring points 1 to 5, after which the respective thickness was measured a second time at the measuring points 1 to 5 (see Table 1: Measurement after the 2nd load).

Thereafter, the difference between the thicknesses before the first load and after the second load was calculated (see Table 1: Difference to origin): Table 1: Determination of the dimensional stability by clamping tests Measuring point no. 1 2 3 4 5 Measurement before 1st load 13.239 13.373 13.458 13.483 13.470 Measurement after 1st load 13.231 13.358 13.458 13.477 13,452 Difference to origin 0.007 -0,015 0,000 -0.006 -0.018 Measurement after 2nd load 13.233 13.358 13,452 13.473 13.446 Difference to origin -0,005 -0,015 -0.006 -0.010 -0.024

The test results underpinned the high dimensional stability of the laminated safety glass pane A): The reduction of the thickness by the load was significantly smaller than 0.5% of the original thickness before the load. The laminated safety glass pane A) was therefore ideally suited for the manufacture of a glass structure in which it could be permanently fixed by means of clamping devices B) solely by the constant surface pressure.

Comparative test

The production of laminated safety glass of construction a1 / PVB / a3 and the determination of its dimensional stability

Example 1 was repeated, except that a polyvinyl butyral (PVB) film of the same thickness was used instead of the SGP film.

The determination of the dimensional stability of the resulting laminated safety glass pane was carried out as described above, except that the clamping tests were carried out at the measuring points V1 to V12 (see Table 2). Table 2: Determination of dimensional stability by clamping tests Measuring point no. V1 V2 V3 V4 V5 V6 Measurement before 1st load 13.092 13.099 13.128 13.163 13.180 13,150 Measurement after 1st load 12.957 12.943 13.056 13.079 13.006 13.012 Difference to origin -0.135 -0.156 -0.072 -0.084 -0.174 -0.138 Measurement after 2nd load 12.955 12,870 13,039 13.071 12.951 12.994 Difference to origin -0.137 -0.229 -0.089 -0.092 -0.229 -0.156 Measuring point no. V7 V8 V9 V10 V11 V12 Measurement before 1st load 13.333 13.339 13.345 13,329 13,290 13.212 Measurement after 1st load 13.202 13.199 13.283 13.260 13.148 13.120 Difference to origin -0.131 -0.140 -0.062 -0.069 -0.142 -0.092 Measurement after 2nd load 13.182 13.153 13.269 13.237 13.077 13,072 Difference to origin -0.151 -0.186 -0.076 -0.092 -0.213 -0.140

The results of Table 2 supported that the laminated safety glass panel of the comparative experiment had significantly lower dimensional stability than the laminated safety glass pane A) of the example: The reduction in thickness by the load was significantly greater than 0.5% of the original pre-load thickness. The laminated safety glass of the comparative experiment was therefore not suitable to be fixed solely by a surface pressure by clamping devices.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0748687 A2 [0006]
• US 5778629 [0006]
• US 6101783 [0006]
• US 5960606 [0006]
• US 6675550 B1 [0006]
• WO 2006/034346 A1 [0007, 0044]
• WO 2005/042246 A1 [0008, 0044]
• WO 2004/048736 A1 [0009]
• EP 0847965 B1 [0034]
• DE 697312168 T2 [0034]
• WO 2007/149082 A1 [0044]

Cited non-patent literature

• DIN EN 572-1 [0034]

Claims (8)

Integrated glass structure comprising A) a dimensionally stable under the stress of a permanent surface pressure laminated glass pane, containing a1) a first glass pane, a2) a layer of a partially neutralized ionomer resin containing in copolymerized form ethylene and / or propylene and at least one alpha, beta-unsaturated carboxylic acid having 3 to 8 carbon atoms in the molecule, and a3) a second glass pane, as well B) at least one clamping device which exerts a permanent surface pressure from both sides on the laminated glass pane A) and fixes the laminated glass pane A) solely by the constant surface pressure. Integrated glass structure according to claim 1, characterized in that the ionomer resin a2) contains a water-soluble sodium salt of a copolymer of ethylene and methacrylic acid. Integrated glass structure according to claim 1 or 2, characterized in that the glass panes a1) and a3) contain float glass or partially prestressed or tempered float glass. Integrated glass structure according to one of claims 1 to 3, characterized in that the clamping devices B) contain clamping fittings. Integrated glass structure according to one of claims 1 to 4, characterized in that the clamping device B) a constant surface pressure of up to 4.5 MPa, on the laminated glass pane A) exerts. Integrated glass structure according to one of claims 1 to 5, characterized in that it comprises further layers. Integrated glass structure according to one of claims 1 to 6, characterized in that it is shaped, in particular curved in one or more spatial directions, is. Integrated glass structure according to one of claims 1 to 7, characterized in that the laminated glass pane A) after a continuous surface pressure of 4.5 MPa for 72 hours and subsequent discharge at the loaded point before a reduction in thickness <0.5% of the original thickness has the load.

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