AT507642A1 - HEAT-RESISTANT HEIGHT-BUILDING STRUCTURAL COATING USING SYNTHETIC SILICONE ACIDIC ACID FOR VARIOUS SURFACES - Google Patents

Description

ANTI-SLIP COATING

The invention relates to a non-slip coating and the processing of fumed silica in nano-particle form as an additive in a composition or mixture, for use as a slip-resistant coating or floor covering with anti-slip properties.

Are known compositions and mixtures of paints and transparent binders which are considered anti-slip and non-slip. In applications with non-exceptional stress in the home, business and public sector, and especially given sufficient time to dry the coating, the known coatings show very good slip resistance and slip resistance values.

A major problem for commercial application is the long drying times of known coatings.

The coatings known in the art use e.g. volatile organic compounds (VOCs) as binders for epoxy or acrylic based compositions. Such coatings have slow curing properties of up to 12 hours at 20 ° C. for drying and 24 hours for accessibility. For full cure under standard atmospheric conditions, such coatings require 5-7 days. For acrylic-based compositions, the addition of accelerators can reduce drying time by about 50%, making it possible to coat coatings in 4 to 6 hours. A major disadvantage of these coatings is the strong odor, which is particularly dangerous indoors, so that the use of these coatings is often rejected by the customer.

Epoxy-based compositions normally have short pot lives of up to 30 minutes and, at standard temperatures, a drying time of up to 12 hours. ··· ·

• · · · · · · · · · · · · α · · · · · ································································ «

Accelerators can significantly reduce drying time, but also reduce pot life and lead to yellowing, with more or less yellowish tinge.

The odor development is harmless compared to acrylic and the abrasion values are significantly better. A strong minus are the short pot lives.

Other known coatings with 1-component VOC polyurethane as a binder and additives for slip resistance form very good height-increasing structures, but can not be stored in the synthetic silica due to the oxygen content, SiO 2.

In order to meet the increased requirements for environmental and economic reasons, there is a need to produce VOC poor and VOC-free compounds.

The present invention teaches such a novel composition and its method of preparation.

Based on an aqueous 2-component dispersion of an epoxy base substance, another non-slip coating with outstanding quality as well as peculiar mixing and application possibilities has now been developed.

The essential components are the components "A" and "3" and an organic solvent, e.g. Methoxypropyl acetate (MPA).

The "A" component is an aqueous dispersion of medium molecular weight epoxy resin solution which is indefinitely dilutable with water. It is e.g. sold under the name CHS-EPOXY 200 V 55 (Spolchemie, Czech Republic).

The, 3 "component is an aqueous solution of aliphatic epoxy polyamine, which is used as a hardener. It is e.g. sold under the name TELALIT 180 (Spolchemie, Czech Republic).

The mixing ratio for optimum cure is given as follows: Component "A" component, 3 "corresponds to 100: 27. ····································································· ··· · · »# ·

In a typical anti-slip floor coating trial mix, the aqueous Epoxyhaiz solution (component, A ") was added with addition of amorphous fumed silica in nanoparticulate form, e.g. Aerosils of types 300 and 200, as well as R 816 (hydrophobic / hydrophilic), created an aqueous dispersion using water. Usually a maximum of about 10-14% synthetic silica are incorporated into the mixture. By the term "silica in nanoparticulate form" according to the present invention are fine fumed silica particles in size ranges from 2 to 70 nm, preferably 2-10 nm, 5-25 nm, 12-30 nm, 20-35 nm, 30-45 nm and / or 50-60 nm. The synthetic silicic acid originally produced by DEGUSSA in the flame hydrolysis of chlorosilanes, and the further development of pyrogenic, X-ray amorphous, hydrophobic synthetic silica (hydrophilic and hydrophobic products) are hereinafter referred to uniformly as synthetic silica or with the product name Aerosil.

After the addition of the synthetic silica and other substances, the mixture was mixed with the hardener, e.g. TELALIT 180, mixed.

The resulting composition cures quickly and well, but is unsuitable for providing slip-resistant or anti-slip structured coatings, as the sheeting is nearly smooth and does not form a rough surface.

In summary, it can therefore be said that not many aqueous binders seem to be suitable for building up slip-resistant to non-slip structures by means of hydrophilic synthetic silica, as shown by the example with CHS EPOXY 200 V 55 when directly mixed with hydrophilic Aerosil. Hydrophobic Aerosil is also not accepted in this mixing experiment.

Another, in his compilation somewhat unusual attempt, brought the surprising turn. It was possible by the addition of methoxypropyl acetate - an organic solvent - to achieve the basis of the aqueous Epoxyhaizdispersion, a composition that clearly indicated no mixing but an intimate stirring. ················································. • ···· ···! According to one embodiment, for the inventive improvement use was made of: component A (EPOXY 200 V 55) 100.00 g MPA (methoxypropyl acetate) 25.00 g silane GLYMO 6.00 g defoamer 1.00 g total 132.00 g stirred very well. Subsequent addition: Aerosil R 805 (hydrophobic) 10.00g is added in small quantities and stirred in by hand if necessary. As a result, the entire content is very well done by machine.

In the resulting composition of a mixture can not be spoken in the strict sense, since in addition to the silane and the defoamer, the main components component "A" (EPOXY 200 V 55), MPA and fumed silica (AEROSIL R 805), although mixed together and together present in the mass, but not mixed. This is clear when storing the mass, after some time, MPA can collect on the surface, on the ground or in the mass in small puddles, which dissolve again when stirred again. It is surprising in this composition, in particular, that the addition of an organic solvent, preferably methoxypropyl acetate (MPA) and / or methoxypropanol and other organic solvents having comparable properties, to an aqueous dispersion increases the total amount of fumed silica which can be stirred in (20% and more). or other additives (up to 85%) is made possible and still an improvement in the shelf life of the composition can be achieved.

After addition of at least 20%, maximum 40% of the component, 3 ", e.g. Telalit 180, an aliphatic epoxy-amines curing agent, based on the component "A", the MPA, or other similar acting solvents, is taken over the aqueous curing agent in a very thorough mixture and processed with the other proportions to an elastic, homogeneous mixture , the with spatulas or other methods, more or less applied, with the appropriate roles to ···· • · • ····· «·! • · 9? more or less strongly structured non-slip coatings on the associated surfaces are ausgeolit and cure within 2 to 2.5, no later than 3-4 hours dust-dry. It is surprising in this composition that the addition of an organic solvent to an aqueous dispersion improved the storage quality, an increase in the stirrable total amount of fumed silica, or other additives and a simultaneous shortening of the drying time could be achieved. Throughout the range, the abrasion and scratch resistance increases enormously. The structure of the non-slip coatings can be adjusted as desired from fine to coarse.

As a result, the composition according to the invention gives a hard-tough, transparent and glossy coating with exceptionally good slip-resistant properties, which it can maintain for years even under heavy load.

The mixtures can be made versatile depending on the nature of the use and need, always characterized by the addition of MPA or other similarly behaving solvents.

One such example is the consistency and elasticity of the blend, which can be adjusted by the level of aliphatic epoxy-polyamine in a range of between 20-40%, thereby yielding very high abrasion end products.

The coating mixtures of the aqueous epoxy resin solutions are named in the following EPSPOL and are divided according to an exemplary embodiment into different requirement classes (all classes are also upwards, divisible). EPSPOL "light" with 5-8% addition of Aerosil R 805 EPSPOL "medium" with 8.5-10% addition of Aerosil R 805 EPSPOL "strong" with 10.5-14% addition of Aerosil R 805 EPSPOL "super" with 14.5-20% addition of Aerosil R 805 ····················································································································································································································

Aerosil R 805 is chosen as an example of a hydrophobic, amorphous, fumed silica. Other types of hydrophobic, fumed, synthetic silicic acid could also be used.

Depending on the requirement class and the added amounts of MPA (or similarly acting solvents, fumed silica, defoamer, silane or / and other additives), the ratio between component "A" (epoxy resin solution) and the additives changes This relationship factor always determines the amount to be added component, 3 "in relation to component" A "The recommended minimum addition of" 3 "is about 20%, but it can also be 30% and 40%, or any fraction between them, with 20%, 3" and With a minimum level of MPA, the mixture is somewhat tough-elastic and forms structures that are stiffer and do not tend to flow.

Such a mixture can also be sprayed with high performance and high pressure sprayers (e.g., GRACO) and the respective spray heads, in addition to the usual applications of spatula, brush or roller, to obtain non - slip coatings directly and in very uniform, fine, non - flowing structures. In such an application method, a subsequent processing step to intensify the slip-resistant structures is unnecessary.

Coatings with more MPA and a higher proportion of component, 3 "bring less rigid structures, but harden equally well. Such structures are still slip-resistant. If they are finer and more wavy, they are better and more hygienic to clean, which is a required target, especially in wet areas, clinics and swimming pools.

In all the mixtures mentioned, the proportion of synthetic silica is about 8 -14%. This is a standard measure and it is difficult due to the strong thixotropy, but it is possible by the inventive composition to get higher proportions up to 20% or more.

·· ··· ···· ····: 7:

Depending on the proportion of fumed silica or Aerosil R 805 on the mixture and depending on the initially added amount of MPA, the composition of the invention stirs more elastic-tough or slightly softer. In any case, it is very easy to apply to all surfaces in question - tiles, stone, metal, wood, concrete, elastomers, PVC, laminate, etc. - and forms structural coatings with anti-slip to absolutely non-slip properties. For surfaces with extreme stress, another embodiment is recommended, because under heavy loads, the structure surveys or tips made of epoxy or other binders, which are reinforced with synthetic silica, too little protected against shock-like abrasion or shearing. Highly stressed or highly frequented surfaces should therefore be coated with mixtures which are additionally reinforced with known fillers. For the structure formation in binders by means of synthetic silica, it is irrelevant whether the binders are without addition or with addition of fillers.

It is interesting, however, that the inventive addition of MPA to the aqueous Epoxyharzdispersion, in addition to the stirring of hydrophobic synthetic silica, the trouble-free stirring of significant proportions (up to a maximum of 75% based on the component "A") of crystalline quartzite, carbides (Green Silicon Carbide (China)), or carborundum of various make and corundum in the inventive mixture allowed.

Crystalline quartzite is available in various sizes. For non-slip coatings it is suitable from 3000 MA up to 16900 MA. For the inventive anti-slip coating, the finest quartzites are best suited because they combine best with aqueous epoxy to give very hard surfaces.

According to the hardness scale of MOHS (10 is diamond), quartz is at seven, high grade corundum at nine, and green silicon carbide at 9.5.

Commercially available corundum or Green Silicon Carbide are available in sizes of usually 53-42 pm to 12-6 pm down. The small size comes with ························································

··· • ···· · Slip-resistant coatings with Green Silicon Carbide only give the green a tinge of gray.

In addition to the curing additives and thermoplastic polyurethane ball pigments (Decosoft) and other abrasion-resistant or elastic rubber particles can be stirred up to a maximum degree of filling of 70% to 85% easily in the inventive composition.

Claims (11)

1. Composition for anti-slip coating of surfaces comprising a component, A 'namely an aqueous dispersion of epoxy resin solution, and further additives and a component, 3 ", namely an aliphatic Epoxypolyamine hardener, characterized in that component" A "with up to 25% an organic solvent, in particular Methoxipropylacetat (MPA) and / or Methoxipropanol is stirred 2. Composition according to claim 1, characterized in that in the mixed with MPA component "A" as a further additive hydrophobic, amorphous, fumed synthetic silica in nanoform, preferably type R 805, in a proportion of 5 -20% based on the component, A "is stirred. 3. The composition of claim 1 or 2, characterized in that in the mixed with MPA component, A "further additives selected from the group consisting of crystalline quartzite, corundum, silicone, carbides, organic spherical pigments, polyurethane particles, rubber particles or mixtures thereof , are stirred. 4. Composition according to one of claims 1 to 3, characterized in that the selected further additives are added up to a maximum proportion of 70 to 85% based on the component, A ". 5. Composition according to one of claims 1 to 3, characterized in that the composition based on the total amount of the component, A "together with the additives after an addition of 20-40% of the component, 3" has a pot life of 2-4 hours , 6. Use of the composition according to one of claims 1 to 5 for applying a slip-resistant, height-increasing structure coating. POSSIBLE VV • ··· »···· ········ ···%, · «9 • 9 • 9 9 • · • 11 99 6. Anti-slip coating obtainable by applying a composition according to any one of claims 1 to 5. CLAIMS 1. A composition for applying a slip-resistant, height-increasing structure coating on smooth surfaces containing a component "A", namely an aqueous dispersion of epoxy resin solution, and other additives and a component , 3 ", namely an aliphatic Epoxypolyamine hardener, characterized in that component" A "with up to 25% of an organic solvent, namely methoxypropyl acetate (MPA) and methoxypropanol is stirred. 2. Composition according to claim 1, characterized in that in the mixed with MPA component "A" as a further additive hydrophobic, amorphous, fumed synthetic silica in nanoform, preferably type R 805, in a proportion of 5 -20% based on the component " A "is stirred. 3. The composition of claim 1 or 2, characterized in that in the mixed with MPA component "A" further additives selected from the group consisting of crystalline quartzite, corundum, silicone, carbides, organic spherical pigments, polyurethane particles, rubber particles or mixtures thereof , are stirred. 4. Composition according to one of claims 1 to 3 characterized marked - that the selected further additives are added up to a maximum proportion of 70 to 85% based on the component "A". 5. Composition according to one of claims 1 to 3, characterized in that the composition based on the total amount of component "A" together with the additives after an addition of 20-40% of the component, 3 "has a pot life of 2 - 4 hours , 7. A process for the preparation of a composition for applying a slip-resistant, height-increasing structural coating on smooth surfaces comprising the steps a) adding to component A said component A up to 25% of an organic solvent, in particular methoxypropylacetate (MPA) and / or methoxypropanol namely, an aqueous dispersion of epoxy resin and other additives; b) addition of 5 to 20% of hydrophobic, amorphous, pyrogenic, synthetic silica in nanoform, based on component A, preferably type R 805; c) stirring the composition; d) adding a component B, namely an aliphatic Epdxypoiyamine curing agent, which causes the mixing of the components and then cured with or without a catalyst. 8. The method according to claim 7, characterized in that based on the component A 5 - 25% MPA, preferably 5 -10% MPA are added to the component A. 9. The method according to claim 7, characterized in that based on the component A 0 - 25% methoxypropanol, preferably 15 - 20% methoxypropanol are added to the component A: 10. The method according to any one of claims 7 to 9, characterized in that in the mixed with MPA and / or methoxypropanol component A further additives selected from the group of crystalline quartzite, corundum, silicone, carbides, organic spherical pigments, polyurethane particles, rubber particles or mixtures of are selected, are stirred. 11. The method according to any one of claims 7 to 10, characterized in that the selected further additives up to a proportion of not more than 70 to 85% based on the component A pasted. | SUBSEQUENT