HU195974B - Water-insulating composition, particularly for the total water-insulation of roof surfaces - Google Patents

Abstract

Compsns. contg. 5-25 pts. wt. known fillers, 7.5-22.5 pts. wt. colouring matter and 60-80 pts. wt. of a 40-60wt.% aq. soln. of a styrene-acrylic-acid copolymer are used for rendering roofing structures totally waterproof.

Description

The present invention relates to a water-quenched water-insulating composition comprising a styrene-acrylic acid copolymer for waterproofing various roof surfaces (such as plastic sheets, bitumen sheets, polystyrene foam, polyurethane foam, concrete, reinforced concrete, plastered surface, etc.).

It is known that waterproofing methods commonly used in the construction industry are essentially two-fold: one uses bitumen or various modified bitumen emulsions, or resin or polyurethane-based formulations which are liquid, so they must be either pre-fabricated or or spray application).

The disadvantage of this solution is that for bitumen emulsions - the application area is limited because bitumen flows at higher temperatures and at higher slopes. The disadvantage of polyurethane-based products is that their waterproofing layer is brittle, so it cannot demand the movement of the building, so in a short period of time, it becomes frayed and ruined.

Different from the above are the pre-made rolled sheets, which can be different bitumen or plastic sheets. Each of these has several significant disadvantages. For example, their color is black, the bonding of the boards to each other is usually not flawless, and the materials cannot follow the movement of the buildings, and as a result are quickly destroyed.

The 169,933 is. According to a Hungarian patent, plastics are used to improve the quality of a cementitious porous body, especially a body made of asbestos cement. The bodies are immersed in a medium containing methyl methacrylate, styrene and an initiator and allowed to polymerize at a temperature of about 70 ° C for 1-3 hours. Thus, a very expensive process creates a layer on the surface of the bodies, which, however, is inelastic, does not withstand the movement of the buildings, and the connection of the individual bodies to each other in a watertight manner has to be solved at the construction site. Elements made in this way can only be used on roof surfaces with a very large slope (slope greater than 15%).

No. 173,947. Hungarian Patent Specification No. 4,198, discloses prefabricated concrete or reinforced concrete elements with a waterproofing layer. A mixture of bitumen emulsion or bitumen emulsion combined with plastic dispersions with fillers is applied to fresh concrete or reinforced concrete elements, compacted, smoothed and steamed. In this way, by a costly process, they form a waterproof layer on the surface of the bodies which is very easily damaged during transport and thus loses its waterproofing capacity. The connection of the individual bodies to each other in a final manner must be made separately at the construction site, for which the patent specification does not recommend a solution. The surface must also be provided with an additional reflective or protective coating, after color black.

No. 177,963. According to the Hungarian patent, a water-impermeable sealing element is provided for sealing the joints of concrete and reinforced concrete elements by watertight sealing. The sealant is made by applying various monomers and initiators to a fibrous, loose-structured skeletal material so as to form a gel, filling the skeletal material and then polymerizing the composition. One is possible - and first and foremost! - the monomer type is various vinyl monomers of the acrylic type, for which divinyl compounds are mentioned among the crosslinking components. However, the sealant thus formed is not suitable for waterproofing entire roof surfaces.

No. 1,044,696. United Kingdom and corresponding 665 347 The Belgian patent describes the formation of a durable barrier layer with an aqueous solution of the ammonium salt of macromolecules containing carboxyl groups. Said acidic polymer or copolymer may be prepared by copolymerization of, inter alia, acrylic acid and monomers containing aromatic vinyl compounds. However, the waterproofing layer so formed is not suitable for waterproofing roofs due to its inelasticity.

No. 6,506,780. Dutch Patent Specification A sealant composition for sealing joints in buildings. The styrene-acrylic acid copolymer has a comonomer ratio of 2 moles acrylic acid and 1 mole styrene. The sealing tape is subsequently treated with a separate coat of paint to protect against sunlight and aging. This composition is completely unsuitable for protecting roof surfaces against water, sun protection and aging are treated with a separate coat of paint as other components ¹ .

No. 83,959 European Patent Specification is a composition consisting of 50% by weight aqueous dispersion of styrene acrylic acid, thixotropic Theological modifier (1 mm polyester ether fiber), thickener (hydroxyethyl cellulose), bactericidal agent, foam barrier and filler (chalk) Fillion). Due to its composition, this composition also requires special protective paint to protect against sunlight and aging. The viscosity adjustment and application aid are solved with two separate materials (lidoxyethylcellulose thickener and 1mm polyester fiber). The filler components do not provide the elasticity required here due to dilation, not to mention the color (dark green to black), composition (quirk, serite, chlorite) and appearance of the FILLIT component.

The 195971 shape (plate, sheath) simply makes it unsuitable for this purpose.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a waterproofing material composition suitable for waterproofing entire roof surfaces without the above disadvantages, without a reflective or surface protective coating.

In connection with this, we have come to the realization that in order to achieve our goal, there is a need for the snow, dilatation, or physical movement, of buildings - an insensitive layer that adheres well to substrates of various materials. In essence, therefore, we need to provide a flexible layer to provide a solution that does not suffer from the disadvantages of known solutions. The prior art compositions were intended to solve waterproofing and light reflection separately. In the case of the composition according to the invention, a coating suitable for forming a suitable elastic layer and colorable in its material is provided.

The aqueous media composition of the present invention - which is suitable for waterproofing various roof surfaces (plastic sheets, bitumen sheets, polystyrene foam, polyurethane foam, concrete, plastered surface, etc.) has a viscosity of 60-80 parts by weight of 900- 1500 mPas 40-60% by weight. 7.5-22.5 parts by weight of an inorganic pigment (rutile titanium dioxide and / or ferric oxide and / or ferric oxide) and 5-25 parts by weight of a filler - of which 1.5-4 parts by weight of pyrogenic silicic acid Contains 3 to 18 parts by weight of talc, 0.5 to 3 parts by weight of magnesium carbonate.

Technical characteristics of the rutile titanium dioxide used in the present invention: density (20 ° C) 4.0-4.1 g / cm ³ , content of volatile matter (105 ° C for 2 h) up to 0.5% sieve residue up to 0.045 mm mesh sieve 0.1%. Characteristics of iron oxide yellow to be used: loss of glow (1000 ° C, 30 min) up to 15% by weight, iron oxide content (in Fe 2 U 3) not less than 85.0%, density (20 ° C), 4.1 g / cm ³ , not more than 0,3% by weight on a sieve with a mesh aperture of 0,045 mm. The iron oxide red used has a density (20 ° C) of 5.1 g / cm ³ , an iron oxide content (in FezCl 2) of at least 95.0%, and a sieve with a mesh size of 0.063 mm and a maximum of 0.3%.

The filler used in the present invention is high-activity pyrogenic silica, talc and magnesium carbonate. High activity pyrogenic silica plays a decisive role in the gel structure of the composition and significantly influences the flow properties through the gel structure. Therefore, no special thickener is required. It also plays an important role in preventing the deposition of higher specific gravity materials in the composition and, by improving homogeneity, increasing the tensile strength of the formed waterproofing layer. Technical characteristics of high activity pyrogenic silica: 200 m ² / g specific surface pH (in 4% aqueous suspension) 3.6-4.3. Characteristics of talc used in filler component: Contains 40-60% talc, 40-60% chlorite and up to 4% other minerals, protein (DIN 5033) MFX Cl 67.5-69.5, specific surface area (Blaine) 10 000-10,800 cm ² / g, pH 8.1-8.3, with a sieve with a mesh size of 0.063 mm up to 1.2% by weight.

Technical characteristics of the magnesium carbonate used as filler component: insoluble in hydrochloric acid not more than 0.3%, loss on ignition 53-55%, sieve with 0.076 mm aperture not more than 0.2%.

The most important feature of our waterproofing material is that after drying it gives a high elastic film. Further benefits are detailed below:

- environmentally compatible and physiologically harmless,

- easy application technology,

- also at elastic lower temperatures,

- the equipment used for application, which can be diluted with water, is easy to clean after application,

- colorable in its own material,

- not flammable,

- can be applied even on steeply sloping surfaces,

- good adhesion to various substrates,

- has excellent resistance to aging.

In addition to high elasticity, minimum water uptake is an important requirement for roof insulation. The waterproofing material composition of the present invention also largely meets this requirement. The main features of the preparation:

dry matter content 50 ~ % w / w pH value viscosity at 23 ° C Brookfield viscous. RVT 8-9 20 rpm 5 spindle rupture elongation approx. 5,400 mPa.s At 23 ° C approx. 900%

Although the waterproofing composition is paste-like, it can be applied by roller, brush or high pressure equipment. It has been found to adhere well to new untreated substrates without an intermediate layer. Such substrates include concrete, wood, cardboard, asbestos cement, brick, polystyrene foam, bitumen bare board, rigid polyurethane foam.

The composition may be applied in two or three coats. The base must be dry and clean before applying. When applying to porous or old, aged substrates, a primer should be prepared. For example, a mass diluted with 10% w / w water is suitable for this purpose. Before applying to iron, a corrosion protection primer must be provided. Pre-seal cracks, holes, mass and fine sand (up to an average particle size of up to 2 mm) in a 1: 3 weight ratio as filler. While application of other formulations is generally only possible on flat or low-slope surfaces, the paste and thixotropic nature of the composition of the present invention can be applied to a variety of inclined to vertical surfaces.

The drying time depends on the material quality of the substrate, the temperature of the air and the object, the relative humidity of the air and the thickness of the layer. Thus, the drying time at 25 ° C outdoor temperature, 65% relative humidity, is approx. 3 hours. If the wet film thickness exceeds 2 mm, the cure time will be significantly increased.

Roof insulation layers are subject to high stresses, also due to changes in outside air temperature. Therefore, the waterproofing material must also have high elongation. The composition according to the invention is still at a temperature of about -10 ° C with an outside air temperature of 1.5 mm. 20% elongation.

In the case of a 1.5 mm wet film coating, about 1 kg of material is used per ms.

To test the waterproofing material composition of the present invention, a combined aging was performed in the following cycles:

1) 20 minutes at 40 ° C 65% relative humidity,

(2) 150 W infrared light for 30 minutes (test specimen surface temperature 65 ° C),

3) 5 minutes at 40 ° C 65% relative humidity,

4) 30 minutes xenon burn 2000W,

5) 5 minutes at 40 ° C 65% relative humidity,

6) 20 minutes water bath, 40 ° C,

7) 10 minutes at 40 ° C 65% relative humidity,

8) 65 minutes at -10 ° C.

After 500 hours (162 cycles) of accelerated combined aging, the waterproofing material film did not show any damage; after 2000 hours (648 cycles), a slight increase in tensile strength and a slight decrease in elongation at break were observed.

After combined aging before

film thickness, mm 0.5 0.5 Major. strength N / mm ² 0:21 0:23 Major. elongation% 285 230

The aqueous medium waterproofing material composition of the present invention is suitable for insulating against the rainwater and / or making the necessary repairs over the entire surface of plastic sheets and other construction materials. The full-surface waterproofing layer thus formed can be tinted to the desired color in the material and therefore does not require any additional reflective or surface protective layer.

The application of the present invention to various fields will be described first in general and then in the context of specific embodiments.

For waterproofing plastic sheets against rainwater, the waterproofing material composition comprises 72-74 parts by weight of a 50% by weight styrene-acrylic acid copolymer dispersion with a viscosity of 1200 mPas (styrene content about 34% by weight), 20.2-21 parts by weight of rutile titanium dioxide and 6-8 parts by weight. containing from 1.7 to 2.3 parts by weight of high activity pyrogenic silica, 3.5 to 4.5 parts by weight of talc, 0.8 to 1.2 parts by weight of magnesium carbonate.

For insulating concrete surfaces against rainwater, the insulating material composition comprises 67-69 parts by weight of a 50% dispersion of styrene-acrylic acid copolymer having a viscosity of 1200 mPas (styrene content about 34%), 8-10 parts of inorganic pigment - of which 0.5-1.5 parts by weight rutile -type titanium dioxide, 7.5-8.5 parts by weight of iron oxide red - 22-24 parts by weight of filler - of which 2.7-3.3 parts by weight of high activity pyrogenic silica, 17.5-18.5 parts by weight of talc, 1,8- -2.2 parts by weight of magnesium carbonate.

Detailed Description of the Invention The composition according to the invention will be understood in the following as follows:

Example 1

For waterproofing plastic sheets against rainwater, the waterproofing material composition has a viscosity of 73.4 parts by weight of 1200 mPas at 50 wt% styrene-acrylic acid copolymer dispersion (styrene content about 34 wt%), (Mov / ilith DM 765, Hoachst, Frankfurt am Main, Germany). 6 parts by weight of rutile-type titanium dioxide and 7 parts by weight of filler - 2 parts by weight of high activity pyrogenic silica (Aerosil 20), Degussa, Frankfurt am Main, 4 parts by weight talc G-3 (Naintsch Mineralwerke, Graz, Austria) 1 part by weight magnesium- carbonate (Lehmann und Voss, Hamburg, Germany) -Turtalinase.

Example 2

For the insulation of concrete surfaces against rainwater, the waterproofing material composition has a styrene content of 68.0 parts by weight of a 50% by weight styrene acrylic acid copolymer dispersion (Mowilith DM 765, Hoechst, Frankfurt am Main, Germany). 34% by weight) 9.0 parts by weight of inorganic pigment - 1 part by weight of rutile titanium dioxide, 8 parts by weight of water oxide red - and 23 parts by weight of filler - 3 parts by weight of high activity pyrogenic silica (Aerosil 200, Degussa, Frankfurt ara Main, Germany) 18 parts by weight of talc G-3 (Naintsch Mitneralwerke, Graz, Austria) Contains 2 parts by weight of magnesium carbonate (Lehmann und Voss, Hamburg, Germany).

The composition according to the invention was tested.

During the tests, the product was diluted with 10% water by weight as a primer. The waiting time between each layer was 3-3 hours.

Reflective and anticorrosive coating systems Min. Was 1.2 mm at the tests. (2-layer coating.)

Waterproofing coating systems dry dry film thickness min. Was 1.8 mm at the tests. (3-layer coating.) The concrete surface should be min. 28 days old, max. It had a moisture content of 5% by weight, free of dust, impurities and excipients.

1. Tests

1.1 Test Mode

The test standard numbers and the description of test methods are listed in detail in the test results tables.

1.2 Evaluation of test results

At least three measurements per breed were made for each of the listed tests, and the tests were performed on three specimens. The results were calculated from the arithmetic mean of the 3 measurements. During the evaluation, the requirements were compared with the test results. The requirements were defined by the requirements of ÉMIS2 293 and the requirements of products and coating systems previously tested for a similar application.

Requirements are also listed in the test results tables.

1.3 Scope of application of coating systems

Reflective, anti-corrosion and waterproof coating system on Taurus W, Akvabit bituminous and concrete surfaces. Testing of coating systems according to MSZ KGST 991 max. mildly aggressive 2. (urban, industrial type I atmospheric) conditions.

1.4 Test results

The test results for the product are shown in Table 1. Table.

Test results for coating systems on concrete surfaces are given in Table 2. in Table.

The results of the coating systems developed on sheet2 insulation are shown in Fig. 3. Table.

-510

1. εζ. spreadsheet

Feature: Requirement: Test result: Test mode: First Second Third 4th External: White, homogeneous White, homogeneous, sensory Skin loss due to skin formation (%): lump-free, dense, paste-like suspension. max.l lump-free, dense, paste-like suspension. MSZ 9650/17 Sediment: With manual stirring With manual stirring MSZ 9650/14 within minutes Within 1 minute take account be generable. homogenized. winter. Non-volatile matter content (X): 61-65 61.7 MSZ 9650/8 Density at 20 ° C (g / cm ³ ): 1.16 to 1.29 1,234 MSZ 9650/2 Hígithatóség max. 10 massX right MSZ 9650/7 with water (X): (for priming only) taking S humbleness (jum): max. 150 110 account. MSZ 9540/6 Shelf life (month): 9 right BS Practical Wet Coverage (g / m ² ): max. 200 140 MSZ 9650/22 Fat time: (H): MSZ KGST 1442 1st grade: max. 1.0 0.2 3rd grade: max. 2.0 1.0 5th grade: max. 4.0 3.0 6th grade: max. 100.0 72.0 Overcoating (h): min. 3.0 right MSZ 9650/24 Filmfelűlet: White, silk White, silk sensory Grip (grade): light, even texture. 0 bright, even texture. 0 MSZ 9640/25 Flexibility with bending (mm): max. 1 Below 1 MSZ 9640/5 Hardness according to Clemen (N): min. 3.4 4.9 Ms. 9640/3 Level (24 h): .Waterproof .Vízálló ' MSZ 9640/11 100 cm): post-aging tests - adhesion (grade): 0 0 According to ÉMISZ 276 (90 ° C, 6h) MSZ 9640/25 - elasticity with bending (mm): max.l Below 1 MSZ 9640/5 - hardness according to Clemen (N): min. 3.4 4.9 MSZ 9640/3 Degree of light resistance in the Xenotest 450 After 1000 hours of exercise: min. 6 7-8 MSZ 9402/50 Water uptake (g / m ² ): max. 200 17.8 ÉMISZ 293 Diffusion resistance (m ² sPa / g): Design data. ÉMISZ 263

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Laboratory tests

Film Surface: Bond strength It should be white, silky smooth and of a uniform texture. White, silky smooth, even texture. sensory ÉMISZ 264 (MPa) min. 0.2 0.7 Surface water 281 reception (g / dm ² ): max. 2.0 0:18 Abrasion resistance: Wear loss max. 0.15g Not measurable. 15 kg sand abrasion load from 1.8 m height. Fast durability- After 100 cycles After 100 cycles ÉMISZ 293 well laboratory failure, failure failure, what cycle exam- indicative of malfunction failure latte Verification tests after 100 laboratory cycles: - adhesive solid- change is not allowed. we've seen a change. ÉMISZ 264 (MPa): - surface water min. 0:18 0.72 281 recording (g / dm ² ): max. 1.8 0:18 Antifreeze Labo- After 100 cycles After 100 cycles ÉMISZ 293 ratory cycle failure, failure failure, analysis: - adhesive solid- no change indicating malfunction is allowed. no change indicating malfunction was observed. ÉMISZ 264 (MPa): - surface water min. 0:18 0.69 281 recording (g / dm ² ): max. 1.8 0:19 Outdoor Weather After 3 years a In progress, MSZ KGST resistance Field trials, field trials failure on test specimens is not allowed. evaluation can only be given after the test is completed. 1767 ÉMISZ 293 workability: Have positive experience in controlling the technology provided by the manufacturing company. In progress, evaluation can only be given after the test is complete. Durability: For application areas min. No malfunction is allowed after 5 years. Evaluation can only be given after the test has been completed.

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Claims (3)

PATENT CLAIMS A waterproofing composition composition comprising a styrene-acrylic acid copolymer comprising 60-80 parts by weight of a 40-60 tX styrene-acrylic acid copolymer having a viscosity of 900-1400 mPas and an aqueous dispersion of styrene of 30-40 tX, 7.5-22.5 by weight of inorganic pigment contains titanium dioxide and optionally iron oxide, 5 to 25 parts by weight of filler, of which 1.5 to 4 parts by weight of pyrogenic silica, 3 to 18 parts by weight of talc, 0.5 to 3 parts by weight of magnesium carbonate. Composition according to Claim 1, characterized in that the inorganic pigment has a rutile titanium dioxide component having a volatile content of -105 ° C to 2H up to 0.5% by weight and a density of 20 to 4.0 g / cm ³ , with a sieve residue of 0.045 Ram or less, up to 0.1% by weight; ignition loss component of the yellow iron oxide - 1000 ° C for 30 min - up to 15 weight percent, iron oxide content - Fe2O3 in - at least 85.0% by weight, density of 20 ° C 4.1 g / cm ^3, 0.045 mm sieve residue sieve maximum 0 , 3 tX; iron oxide red component Fe2f'3 in iron oxide content - of at least 95%, density at 20 ° C of 5.1 g / cm ^3, 0.063 mm in sieve mesh sieve residue of at most 0.3 weight percent. Composition according to claim 1, characterized in that the filler has a specific surface area of 200 m ² / g of high activity pyrogenic silica component in a pH 4 to 3.6 aqueous suspension; active ingredient content of talc component 40-60 t% talc, 40-60 tX chlorine t, up to 4 tX other minerals, whiteness - DIN 5033 - MFX Cl 67,5-69,5 specific surface area - Blaine - 10 000-10 800 cm ² / g, pH 8.1-8.3 mesh residue, 0.063 mm mesh maximum 1.2 tX; the magnesium carbonate component has a loss on ignition of 53 to 55 tX, a fraction insoluble in hydrochloric acid of not more than 0,3 tX, and a sieve with a mesh aperture of not more than 0,2 tX.