DD300179A7 - FIBER-REINFORCED ADHESIVE FOR ADHESIVES ANCHOR - Google Patents

Abstract

The invention relates to an adhesive reinforced with fibers based on polyester, acrylate and / or epoxy resins for the production of adhesive or composite anchors (hereinafter referred to as composite anchors). Composite anchors produced in this way can be used particularly advantageously in concrete, aerated concrete and other masonry for walls as well as for ceilings and floorboards. Adhesive; glue anchor; Shear connector; Polyester resin; acrylate; Epoxy resin, thixotropic; Resin system; Klebgrundstoffanreicherung; Fiber}

Description

Field of application of the invention

The invention relates to a fiber-reinforced adhesive based on polyester, acrylate and / or epoxy resins for the production of adhesive or V rbundankern (hereinafter called composite anchor). Composite inserts produced in this way can be used particularly advantageously in concrete, aerated concrete and other masonry for walls as well as for ceilings and floorboards.

Characteristic of the known technical solutions

In DE-OS 2143440 the attachment of metal anchors with the necessary parts is described. The composition of the adhesive used is not explained in detail.

For embedding anchoring elements in masonry 2836835 plastic hot melt adhesives are used in DE-OS, which are introduced by means of heatable special devices between the anchor and masonry. This process is technologically complex and uncertain by the rapid solidification of the hot melt adhesives in contact with cold adherends, combined with insufficient filling and filling wetting and by the moisture sensitivity of this adhesive group. Adhesives which can be activated by pressure or heat are used in DE-OS 3009312 for fastening self-drilling dowels. The composition of the adhesives used is not discussed in detail.

In DE-OS 3525197 a reactive adhesive for attachment of specially trained anchors is used, which is introduced through a filling opening in the fastener. Such fasteners are expensive to manufacture.

The adhesives used may contain only small amounts of fine-grained reinforcing fillers.

As is apparent from DE-OS 26 25492, are used for attachment of the anchor in the borehole reaction ^ resins, which are possibly enriched with quartz particles or a similar substance. The state of the art for fiber-reinforced adhesives can be found in the following references:

- Vieweg, R .; Goerden, L: Plastics Handbook, Vol. VIII, Polyester, page 406ff., Carl Hanser Verlag, Munich 1973

- Ludeck, W .: Manual of the adhesive, casting and laminating, VEB German publishing house for basic industry, Leipzig 1986

- Adhesive Technology, Developments Sinse 1977, Ed. by S. Thorrey, Noyes Data Corporation, Park Ridge, New Jersey, USA 1980

Object of the invention

The object of the invention is to achieve an improved force transmission in composite anchors between the structural material and the metal part.

Explanation of the essence of the invention

The technical problem which is solved by the invention is to make an adhesive base material with fibers which in addition to the reinforcing additionally exert, as far as possible, a thixotropic effect on the resin system used. According to the invention, this object is achieved in that to known polyester, acrylate and / or epoxy resin thixotropic fibers with a fineness of 0.05 to 1 tex and a cut length of 0.1 to 10 mm / are used, wherein fibers

1. conventional acrylonitrile homo- and / or copolymer fibers (acrylic fibers),

2. modified acrylonitrile homo- and / or copolymeric fibers such as thermo-oxidatively stabilized acrylic fibers, with sulfur or sulfur derivatives modified acrylic fibers and / or acrylate fibers and

3. Acrylic or pitch based carbon fibers

used alone or in admixture, or in conjunction with fillers such as silica sand, serpentinite gravel or silicon carbide. The modification of the acrylic fibers can be carried out with atmospheric oxygen at 200 to 300 ° C or with suitable sulfur derivatives such as sodium polysulfide, sodium thiosulfate or Natriumthiosemicarbazid in alkaline-alkanolic medium at temperatures above 100 ° C or by specific hydrolysis.

The proportion of reinforcing material may be between 0.5 and 10%, based on the resin-hardener system, depending on the type of use of the anchor and the resin-hardener system chosen here.

The described fibers have good wettability even without adhesive treatment and exhibit good weathering resistance in combination with polyester, acrylate and / or epoxy resin systems. By additional surface treatment of the fibers by means of appropriate adhesives, the hydrolytic resistance of the resin-hardener system and thus also of the composite anchor can be increased.

By adding coarse-grained fillers such. As quartz sand, serpentinite or calcium carbide, the technological handling is improved in the application of the composite anchor without significantly affecting the strength properties of the fiber reinforced system. It is a filler addition of about 0.5 to 150% based on the resin-hardener system possible. Depending on the type of application of the armature and of the selected He hz-Hä rter system, the selection of the respective type of fiber or a type of fiber mixture must be made in any ratio. Of particular advantage for the application is the strong thixotropic effect of the cut fibers, which occurred completely surprisingly, but for the practical application of great importance, especially in so-called overhead work.

Exercise booklet 1

To a resin-Hä ier system consisting of

83.3% polyester based on 80- 60% fumaric anhydride 20- 40% phthalic anhydride 98-105% 1,3-butylene glycol 0.2% hydroquinone 5% irj in dibutyl phthalate 1.0% dimethylaniline u, 5% bishydroxyethyl-m-toluidine 10.0% quartz sand of grain size 1.5mm

become

0.5% thermooxidatively stabilized polyacrylonitrile fiber of fineness 0.13tex and cut length 5mm added and distributed in the resin.

To harden this mixture

4.5% benzoyl peroxide paste 50% in dibutyl phthalate

admit and mix quickly. Within a time <60 seconds solidification occurs.

The storage stability of the mixture without peroxide addition was successfully tested for 72 hours at 8O ⁰ C in a short test.

The tensile strength of an M12 anchor 110mm deep in concrete B500 is 29kN after 24 hours. Without the added fiber, the tensile strength is 22 kN for the same anchor dimension and installation depth.

Embodiment 2

A resin hardener system consisting of

67.1% dianepoxide resin with an epoxide equivalent of 190 7.5% isobutyl glycidyl ether 9.0% dipropylenetriamine, roinst

witd with

1.5% acrylonitrile-hornpolymerisatfasern of fineness 0.34tex and fiber length 3mm 14.9% serpentinite of grain size 2mm

offset and homogenized. The service life of the mixture is about 45 minutes, the curing time is about 24 hours. The storage stability of the mixture without addition of hardener has been successfully tested for 72 hours at 8O ⁰ C in the short-term test.

Embodiment 3

To a resin, consisting of

58.8% 2,2-bis-4 (2-hydroxy-3-methacryloxy-propyloxy) -phenylpropane 25.2% tetraethylene glycol dimethacrylate

0.3% Ν, Ν-dimethyl-p-toluidine

0.5% acrylic-based carbon fiber, which has been conventionally surface-treated, with the fineness of 0.065 tex and the

Fiber length of 0.5 mm 15.0% SiliciumcarbiJ the grain size 1.5mm

1.2% Benzoylperoxidpaste6ö% in silicone oil

added and homogenized quickly. The service life of the mixture is about 45 seconds. The storage stability of the mixture without addition of peroxide was successfully tested for 3 months at 20 ° C storage temperature.

Embodiment 4

To a resin, consisting of

58.4% dianepoxide resin with an epoxide equivalent of 200

16.6% of 1,7-bis- [3- (2,3-epoxypropoxy) -propyl] -1,7-diphenylhexamethyltetrasiloxane having an epoxide equivalent of 378.8.4% polyester alcohol according to DD-WP 104988 (tetrasiloxane units: 15.3%) % / Zinc content: 0.16% / acid number: 2 / hydroxy equivalent 178)

8.4% acrylonitrile copolymer fiber made from 92 parts of TI acrylonitrile, 1.8 parts of sodium allylsulfonate and 6.2 parts of ethyl acrylate, of fineness 0.17tex and fiber length 3 mm

are 8.2% dipropylenetriamine, purest

given and homogenized. The service life of the mixture is 55 minutes. The storage stability of the resin without hardener was successfully tested at 6 months.

With the invention, a reduction of the effort is achieved to a considerable extent. In particular, the assembly processes in the construction and finishing industry can be rationalized, since in scale Maurer work accounts for the use of hitherto conventional wall anchors. The use of the composite anchor makes it possible to use new construction technologies for new construction, for the refurbishment of buildings and for preservation of monuments with high strength, since it is possible to attach viable fasteners to any admissible point of a building, without any pressure on the holding element is exercised.

Thus, for example, for the first time an application for partitions, in particular lightweight wall constructions (eg.

Gas concrete, thin concrete, gypsum walls). Another advantage is that the anchoring element is not only tension-free, but also corrosion-resistant enclosed in the concrete by the composite anchor.

Claims (4)

1. conventional acrylonitrile homo- and / or copolymer fibers (acrylic fibers), 1. A fiber-reinforced adhesive for adhesive or composite anchors based on polyester, acrylate and / or epoxy resins, characterized in that as reinforcing material suitable thixotropic fibers having a fineness of 0.05 to 1 tex and a cut length of 0, 1 to 10mm, being used as fibers 2. Fiber-reinforced adhesive based on polyester, acrylate and / or epoxy resins for composite anchor according to claim 1, characterized in that the fiber content is 0.1 to 10% based on the resin-hardener system. 2. modified acrylonitrile homo- and / or copolymeric fibers such as thermo-oxidatively stabilized acrylic fibers, with sulfur or sulfur derivatives modified acrylic fibers and / or acrylate fibers and 3. Fiber-reinforced adhesive based on polyester, acrylate and / or epoxy resins for composite anchor according to claim 1 and 2, characterized in that the filler additive can be 0.5 to 150% based on the resin-hardener system. 3. Acrylic or pitch based carbon fibers used alone or in admixture, or in conjunction with fillers such as silica sand, serpentinite gravel or silicon carbide. 4. Fiber-reinforced adhesive based on polyester, acrylate and / or epoxy resins for composite anchors according to claim 1 and 2, characterized in that the fiber surfaces can be pretreated with polyester, acrylate and / or epoxy resins suitable methods and means.