DD160277A1 - EPOXY RESIN LACQUER FOR DUST CONTAINING AND HUMIDIFICATION OF SUCTION-PROOF MASSIVE COMPONENTS - Google Patents

Abstract

The invention relates to a solvent-containing, chem. härtenden epoxy paint for dust binding u. Feuteversiegelg. highly absorbent massive components. The invention is directed to the use of an epoxy resin varnish for the treatment of concrete floors and walls where no suitable tile can be applied for economic reasons. The essence of the invention is to achieve a sealing, hard floor seal which is chemically resistant and whose wear resistance and life are significantly increased. According to the invention, the object is achieved in that diandiglycidyl ether m. a reactive Verdunungsungsmittelzusatz is mixed with dimethylformamide. In addition, a low-viscosity aromatic aminopolyamide is used as a hardener. A special application is the addition of a surfactant so that a boundary phase emulsion is stabilized against water and the paint system is transferred from the hydrophilic to a hydrophilic state.

Description

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Epoxy resin varnish for dust binding and pseudo-sealing of absorbent solid components

The invention relates to a solvent-containing, chemically curing, predominantly unpigmented, but transparent dyeable Epoxidharzlack for dust binding and Peuchteversiegelung highly absorbent solid components, especially concrete floors and walls, where for economic reasons, no suitable tile can be applied «

Characteristic of the known solutions ^ _n technical ".

It is known to use epoxy resins and paints made therefrom in a wide range of applications and in a diverse composition in order to solve certain coating problems for material surfaces (Dr. H. Jahn "Epoxidharze" VEB Deutscher Verlag für Grundstoffchemie, Leipzig 1969) on wet or wet or submerged massive components or material surfaces are already known (DL-PS 56 879, DL-PS 12 660) _β

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Because of the shortening of dehydration times or the saving of additional expenditures, these processes can be of great importance economically and certainly allow certain additional costs for the necessary materials.

In general, this aqueous dispersions of epoxy resins or their solutions with the addition of z. B, surfactants of latex dispersions and increased or altered Härterungskiinationen used to obtain sufficient adhesion conditions, which are an important prerequisite to avoid undercrossing of the coating by aggressive media · This is necessary for drying and curing three-dimensional cross-linking of the resin-hardener system either temporarily inhibited by the existing or added water or kept unaffected in other found hardener combinations (DL-PS 117 469, DE-OS 28 00 323).

In the case of the aqueous emulsion-curing epoxy paint systems, the drying time may be shortened with the achievement of limited adhesion conditions, but only a superficial occupancy occurs in fully soaked solid components such as concrete or masonry or paving joints which have become permeable.

In this case, the binder content of the system, which is filtered out of the still a pigment content intermediately, do not penetrate deeply into the absorbent surface and seal it, as the Hasse diffuses out as in special building areas under an internal pressure · Therefore, a dust binding takes place only insufficient.

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Object of the invention.

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The invention is directed to the use of a chemical-resistant epoxy resin paint, which has dust binding and Peuchteversiegelung eaugfähiger solid components, especially concrete floors and walls result.

The invention has for its object to ensure the application of a chemical-resistant epoxy paint, which achieves a sealing, hard floor seal, which is temporarily resistant to a wide range of aggresy siver inorganic and organic chemicals or the primer for a subsequent, high-quality Bpoxidbespachtelung forms and their wear resistance and life significantly increased without dehydration of the solid components is made, with the time-consuming construction or expansion delays would occur «.

According to the invention the object is achieved in that the low-viscosity, rich in binders, unpigmented

20 'clear and transparent dyeable epoxy resin paint is stirred with the organic solvent dimethylformamide, which dissolves even cold-cured epoxy resin or »swells. The low-viscosity binder content does an epoxy type Diandiglycidäther with reactive diluent content with a weak excess, but not water-soluble _s-curable water, liquid hardener of the type of an aromatic amino-polyamide in a large quantitative variation, "The three-dimensional crosslinking of these Epoxidkombination is such that a Hochviskoaität and residual fluidity until after the occurrence of the often adverse and leading to stress cracks shrinkage hardening occurs «

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An acetone addition as a high-speed, water-soluble solvent keeps the viscosity of the moisture binder substantially less than 20 centipoise, and the water absorption capacity of the paint film is increased before emulsion enters.

It is a weak cure inhibitor, but it causes strong diffusion and absorption against aqueous boundary phases. Therefore, the acetone content is advantageously suitable for such bulk solid components whose cavities are filled with water to prevent penetration of the unpigmented but transparently dyeable epoxy based paint (moisture binder). to achieve and evaporate the displaced water quickly on the surface.

A small addition of a solvent-soluble, anhydrous, even medium-viscosity, non-ionic surfactants, which is formed by addition of ethylene oxide to cresols, also increases the water absorbency of the liquid moisture binder and stabilizes the wettability and a boundary phase emulsion · This component is kept so small that after the evaporation of the solvent and dgm, hardening process, no water swelling of the paint system and the coating system according to the invention changes from the hydrophilic to a hydrophobic state.

Ausführunpsbeispiel

The solution according to the invention will be described below in two Ausführungsbeiapielen ·

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example 1

Moisture binder for highly absorbent solid components with residual moisture

Component A;

65% by weight of epoxy resin, diandiglycidyl ether with

reactive diluents

15% by weight of dimethylformamide 19% by weight of acetone

1% by weight of surfactant from cresol »ethylene oxide

- ~ - - 'Addition reaction

100% by weight

added with the component B

30% by weight of aromatic aminopolyamide as hardener

The pot-life after the Yerm. C ^ xidfi components A,... And B is at temperature abhäpg'igjkcfit prei bis'trei T§ge _?

Example 2

Moisture binder for fully saturated absorbent solid components

Component k%

35% by weight of epoxy resin, diandiglycidyl ether:. with reactive diluent

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30% by weight of dimethylformamide 33% by weight of acetone 2% by weight of surfactant from the silica-ethylene oxide

^ _jiiLj An'lagerungsreaktion

100% by weight added with the component B 15% by weight of aromatic arainopolyamide as hardener

The pot life after mixing components A and B is three bia six days if the temperature is dependent on

Claims (5)

-7- 2 * 4 ÜÖ5 Erfindungaanspruch 1. Epoxidharzlack for dust binding and moisture sealing of absorbent massive components, characterized in that a low-viscosity, rich in binders, unpigmented clear and transparent colorable Epoxidharzlack is stirred with dimethylformamide, 2. Epoxidharzlack according to item 1, characterized in that the niederviakose binder content of Diandiglycidäther is taken over with a reactive diluent additive * 3. Epoxidharzlack according to item 1, characterized in that a low viscosity, aromatic aminopolyamide is used as a curing agent. 4. Epoxidharzlack according to item 1, characterized in that by the addition of acetone, the diffusion is accelerated against the aqueous boundary phase, 5. Epoxidharzlack according to item 1, characterized in that stabilized by the addition of a surfactant, a boundary phase «emulsion against water and the paint system is transferred from the hydrophilic to a hydrophilic state»