Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Patent
1996-04-04
1998-02-03
Nold, Charles
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
428 347, 52698, 206219, 206220, 411 82, 411258, 156314, 156310, 156293, 156294, E21B 3300
Patent
active
057142165
DESCRIPTION:
BRIEF SUMMARY
The object of the present invention is a storable glass tube sealed on both sides and containing both components of a two-component adhesive as well as fibers or chips which can be used for introducing said two-component adhesive and said fibers or chips in boreholes for anchoring fastening elements, in particular screws, anchors, clamps and bolts, as well as a process for the preparation thereof and the use thereof.
From WO 92/18697, there is known a process and means for anchoring fastening elements in boreholes wherein the boreholes are filled with a compressible mixture of highly wear-resistant metal, polymer and/or ceramic fibers or chips whose average lengths are less than half the diameter of the borehole, followed by introducing the two components of the adhesive consecutively or simultaneously and then inserting the remainder of the necessary quantity of fibers or chips. Further, there is described the processing of a compressible mixture of highly wear-resistant fibers or chips with the two components of the adhesive to yield a kneadable composition which is pressed into the boreholes.
Said process and means for anchoring fastening elements in bore-holes have been found to be excellently useful, resulting in hitherto unknown strengths. One drawback of said process and means is that they have to be prepared in situ. Special difficul- ties are encountered in this process with boreholes in ceilings. But even the insertion of these means into horizontal boreholes involves some difficulties.
It has been known to use glass cartridges which contain several components of a synthetic resin and silica sand, wherein a special hardener is present in a smaller sealed glass tube which is enclosed in the glass cartridge which hardener will initiate polymerization of the synthetic resin. These glass tubes are inserted into the borehole and disrupted when the fastening element is introduced wherein a hardening plastic mortar is formed which bonds the fastening element within the borehole. These cartridges and the bonding anchor prepared therewith are described in detail in the Kunststoff-Handbuch 10., DUROPLASTE, Hanser 1988, pages 881 to 883.
These glass cartridges have the drawback that they are not suitable for two-component adhesives reacting by polyaddition which consist of two approximately equal amounts of the two components. The insertion of an approximately equal amount of a two-component adhesive into a sealed tube which has to be inserted into a larger sealed tube is very difficult for mere spatial reasons. It is still more difficult to further introduce the necessary amount of fibers or chips in this mixture.
Another drawback of the prior art glass cartridges is the relatively low heat resistance of the synthetic resins formed and their sensitivity towards alkali and moisture.
Therefore, it is the object of the present invention to provide the two components of a two-component adhesive which will react by polyaddition and the necessary amount of fibers or chips within a glass cartridge which is well storable and easy to handle so that the proven components according to WO 92/18697 can also be inserted into horizontal boreholes and into boreholes in ceilings. Furthermore, the anchorages formed should be resistant to heat, alkali and moisture.
These objects have now been achieved surprisingly easily by glass tubes sealed on both sides and containing at least one portion each of compositions A and B wherein composition A consists of a mixture of the first component of a two-component adhesive which will react by polyaddition, and fibers or chips incorporated therein which mixture is viscous at room temperature and liquid at elevated temperatures, and composition B consists of a mixture of the second component of a two-component adhesive and fibers or chips incorporated therein which mixture is viscous at room temperature and liquid at elevated temperatures, wherein said compositions A and B are in immediate contact, being located in said glass tube such that there are both portions of composition A and p
REFERENCES:
patent: 4686272 (1987-08-01), Wallace
Banhardt Volker
Koberski Ulrich
Koch Marmorit GmbH
Nold Charles
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