Sealant composition for multi-pane insulation glass

Abstract

The invention relates to a sealant composition for the manufacture of multi-pane insulation glass which is characterised by its composition.

Description

[0001] DESCRIPTION

[0002] Sealant composition for multi-pane insulating glass

[0003] The invention relates to a sealant composition for a multi-pane insulating glass unit.

[0004] Multi-pane insulating glass is well known. It consists of two or more parallel glass panes, joined at their edges to prevent moisture from penetrating the space between the panes and to seal them against the ambient air. The key objective is therefore to prevent moisture penetration and gas from escaping from the space between the panes. Spacers made of aluminum or other metals are essentially a thing of the past. A sealant, often polyisobutylene or butyl rubber, is placed between the surfaces of the spacer facing the glass panes and the glass surface. Instead of prefabricated metal profiles, prefabricated thermoplastic or plastic profiles or materials extruded directly onto the glass panes are used.However, the mechanical cohesion of such panes also deteriorates when exposed to weather influences, etc., with the risk of mechanical or chemical damage.

[0005] Based on this prior art, the present invention seeks to provide an improved sealant composition characterized by optimization with respect to moisture penetration or gas leakage. This object is achieved by a sealant composition comprising at least one of the following ingredients:

[0006] - 15.0 to 25.0 wt.% carbon black grades

[0007] - 5.0 to 30.0 wt.% polymers, modified

[0008] - 5.0 to 12.0 wt.% isobutylene Isoprene Rubber grades

[0009] - 3.0 to 10.0 wt.% ethylene vinyl acetate

[0010] - 2.0 to 20.0 wt.% calcium carbonate grades

[0011] - 10.0 to 25.0 wt.% zeolite

[0012] - 3.0 to 15.0 wt.% aliphatic hydrocarbon resins

[0013] - 1.0 to 5.0 wt.% silanes (grades 3a - 10a)

[0014] - 1.0 to 5.0 wt.% rosin ester

[0015] - 1.0 to 5.0 wt.% catalysts, antioxidants, UV stabilizers

[0016] This creates a sealant composition based on the "all-in-one" principle that meets the highest demands with regard to external mechanical and / or chemical stresses. Such a sealant composition is preferably used in the production of multi-pane insulating glass, whereby all components used for insulating glass production, such as primary sealant, secondary sealant, spacers and / or desiccants, including flexible spacers with integrated desiccants, are used in a single thermoplastic form. In addition to the aforementioned sealing effect, the sealant composition according to the invention is very advantageous in many respects. For example, the sealing of the panes can be maintained with just one component, which leads to low inventory requirements and inventory costs.There is no longer any need to keep spacers of different sizes and dimensions, primary sealant, secondary sealant, or desiccant in stock. This also eliminates various tasks such as bending or cutting the spacers, butylating them, and sealing with secondary sealant. The need for corner or longitudinal connectors is also eliminated. This leads to less labor and thus lower costs and enables automation in just a few steps. Also worth mentioning is the reduced thermal conductivity of the multi-pane insulating glass units due to the complete thermoplastic sealing of the panes – and this without metal. This makes the multi-pane insulating glass units according to the invention particularly environmentally friendly thanks to the reduced thermal conductivity of the sealant. Condensation at the corners and edges of the panes is also significantly reduced. Added to this is lower gas loss.The same applies to the reduced humidity inside the glass panes, which results in an extended service life. Better and long-lasting adhesion also enables the use of "all-in-one" panes in facade construction.

[0017] The sealant composition serves as a component of the composite for the production of multi-pane insulating glass units, reflecting its preferred application. This creates a sealant composition based on the "all-in-one" principle that meets the highest demands regarding external mechanical and chemical stresses.

[0018] Specifically, the sealant composition serves not only as a component, but as the sole component of the composite used to produce multi-pane insulating glass. Thus, thanks to the invention, multi-pane insulating glass composite systems can be manufactured in a single-component manner.

[0019] Other applications are also conceivable.

[0020] An advantageous embodiment of the invention provides that the sealant composition serves as a primary sealant, secondary sealant, desiccant, and / or spacer, preferably as a spacer with an integrated desiccant, for the production of multi-pane insulating glass units, thus combining the aforementioned functions in the sealant according to the invention. What is meant by the single-component production of multi-pane insulating glass composite systems becomes clear when it is stated that the multi-pane insulating glass contains individually sealed, hot-applied adhesives. Individually sealed adhesives that cure with the ambient air humidity are used.

[0021] In this context, it is intended that the adhesives contain a mixture of reactive and non-reactive binders.

[0022] This can be specified as a reactive binder made of silane-functional polyisobutylene, silane-functional butyl rubber, silane-functional copolymer, silane-functional hydrogenated polybutadiene, and / or silane-functional poly-α-olefin. These are the reactive binders.

[0023] As for the non-reactive binders, it is suggested that a non-reactive binder comes from the group of butyl rubber, poly-a-olefins, rosin esters, hydrocarbon resins, rubbers based on copolymers.

[0024] To improve the quality of adhesion between the glass panes and the sealant, it is suggested that the glass pane edges are cleaned with a primary cleaner before application.

[0025] It is also proposed that the edges of the glass panes be surface-treated prior to application. This could be done using a laser or plasma treatment.

[0026] The invention is particularly characterized by the fact that a sealant composition has been created which functions according to the "all in one" principle, especially since multi-pane insulating glass composite systems can now be manufactured using a single component, by using individually sealed, hot-applied adhesive compositions which cure with the humidity of the ambient air and contain a mixture of reactive and non-reactive binders. Further details and advantages of the subject matter of the invention emerge from the following description of the accompanying drawing, in which a preferred embodiment is illustrated with the necessary details and individual parts. The single figure shows a schematic diagram of a two-pane insulating glass composite 1, consisting of two parallel glass panes 2, 3 and the intermediate space 5. The sealant 4 is multifunctional in that it combines various functions.These include primary sealant, secondary sealant, spacers and desiccants.

Claims

PATENT CLAIMS 1. Sealant composition comprising: - 15.0 to 25.0 wt.% carbon black grades - 5.0 to 30.0 wt.% polymers modified - 5.0 to 12.0 wt.% isobutylene Isoprene Rubber grades - 3.0 to 10.0 wt.% ethylene vinyl acetate - 2.0 to 20.0 wt.% calcium carbonate grades - 10.0 to 25.0 wt.% zeolite grades (3a - 10a) - 3.0 to 15.0 wt.% aliphatic hydrocarbon resins - 1.0 to 5.0 wt.% silanes - 1.0 to 5.0 wt.% rosin ester - 1.0 to 5.0 wt.% catalysts, antioxidants, UV stabilizers 2. Sealant composition according to claim 1, characterized in that the sealant composition serves as a component of a composite in the production of multi-pane insulating glass (1).

3. Sealant composition according to claim 2, characterized in that the sealant composition serves as the sole component of the composite for producing multi-pane insulating glass (1).

4. Sealant composition according to claim 1, characterized in that the sealant composition serves as a primary sealant, secondary sealant, desiccant and / or spacer, preferably as a spacer with integrated desiccant for the production of multi-pane insulating glass (1).

5. Sealant composition according to claim 1, characterized in that individually sealed, hot-applied adhesive compositions are provided for the production of the multi-pane insulating glass (1).

6. Sealant composition according to claim 5, characterized in that the adhesive sealant masses contain a mixture of reactive and non-reactive binders.

7. Sealant composition according to claim 1, characterized in that a reactive binder is made of silane-functional polyisobutylene, silane-functional butyl rubber, silane-functional copolymer, silane-functional hydrogenated polybutadiene and / or silane-functional poly-α-olefin.

8. Sealant composition according to claim 1, characterized in that a non-reactive binder is selected from the group consisting of butyl rubber, poly-α-olefin polybutenes, rosin esters, hydrocarbon resins and rubbers based on copolymers.

9. Sealant composition according to claim 1, characterized in that the glass pane edges are cleaned with a primary cleaner before application.

10. Sealant composition according to claim 1, characterized in that the glass pane edges are surface-treated before application.

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