DE2211999A1 - Wall and paving with protective coverings - Google Patents

Description

National Patent Development Corporation 2 2 I ι

375 Park Avenue, New York, N.Y./V.St.A.

(Prio .: US SN 125 706 - V.St.A

18. 3- 1971 - 9070)

Hamburg, March 9th, 1972

House and plaster white with protective coatings

The invention relates to the treatment of masonry made of concrete, Stone or other materials, especially buildings, as well as concrete or cement paving stones to prevent damage due to weather conditions, salts, or microorganisms.

It is known that aggregate building materials absorb moisture, attacked by air pollution and, in particular Concrete roads and other concrete pavement, due to the action of ~ salts such as calcium chloride, sodium chloride and the like, which are used as antifreeze can be damaged

Sealing protective coatings can be applied to the surfaces of certain masonry made of beetroot, stone or other material, the other side of which is exposed and allows an exchange with the surrounding atmosphere. If this is not the case, however, with such sealing coatings, the moisture present in the masonry will cause the coating to blister, peel and the underlying stone or concrete to crumble. These appearances occur

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particularly strong under temperature fluctuations at different Humidity.

The present invention is therefore based on the object of reducing the adverse effects of sealing coatings and still avoid the seepage of water and substances carried along by the water into the surface of masonry To delay or prevent concrete, stone or other material. On the other hand, the invention is intended to damage in Concrete pavement should be prevented from exposure to salts and other substances. Another object of the invention is to prevent or delay the attack of bacteria, fungi or the like on masonry and concrete pavement and To protect masonry, especially buildings, and concrete pavement against soiling. After all, with the Invention Protective coatings for masonry, in particular buildings, and paving with one for achieving the stated objectives suitable water vapor permeability can be proposed.

It has now been found that these objects can be achieved by laying the masonry, buildings, concrete or cement pavement with a water-insoluble hydrophilic acrylate or methacrylate polymer from the group of polymers of hydroxyalkyl aylates, Hydroxyalkyl methacrylates, hydroxyalkoxyalkyl acrylates, Hydroxyalkoxyalkyl methacrylates, alkoxyalkyl acrylates and alkoxyalkyl methacrylates each having lower

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Alkoxymide provides lower alkyl groups. Preferred Polymers are the polymers of hydroxyethyl acrylate, Hydroxyethyl methacrylate (HAMA), Hydroxypropylaerylat, Hydroxypropyimethacrylat, Methoxyethyl acrylate (MM), Methoxyäthyljaethaerylat, A'thoxyä thylacrylat and Äthoxyäthylmethacrylat, however, the polymers of Hydro xyä tho xyä thylacrylat can also be used or methacrylate and hydroxypropoxypropyl acrylate can be used.

Besides the homopolymers of these monomers and the copolymers of these monomers with one another in mixtures of, for example 0.1 "to $ 99.9 of each component, e.g. 6Q $ HMA-4O $ MM also copolymers of these monomers with "up to $ 50, e.g. 0.1 Ms 50 $, acrylamide (e.g. a copolymer of 80 $ HÄBIA— 20 $ acrylamide), Methacrylamide, diacetone acrylamide, N-alkyl acrylamides and -methacrylamides with lower alkyl groups, e.g., N-isopropyl acrylamide, N ~ methyl methacrylamide and N-ethylacrylamide, Vinylpyrrolidone or other hydrophilic polymerizable monomers can be used. Copolymers of lower hydroxyalkyl acrylates with up to $ 60, e.g. 0.1 to $ 60, but preferably not more than $ 40, hydrophobic monomers such as lower alkyl acrylates and methacrylates, e.g. methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, Methyl methacrylate, isopropyl methacrylate, butyl methacrylate, Vinyl chloride, vinyl fluoride, vinyl acetate, vinyl propionate, vinyl butyrate, styrene, o-methyl styrene, p-methyl styrene,

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οι -Methylstyrene, acrylonitrile, methacrylonitrile, vinylidene chloride and vinylidene fluoride can be used. Corresponding copolymers with hydrophobic monomers from the lower alkoxyalkyl acrylates or methacrylates can also be used, but the alkoxyalkyl acrylate or methacrylate should make up at least 50 $ of the total monomer *

The polymers suitable for the purposes of the invention are - apart from the fact that they have the required water vapor permeability - durable and weatherproof and adhere well to the surfaces of masonry and concrete structures and paving.

The water vapor permeable film-forming polymers can by brushing on, spraying on or rolling on from aqueous Dispersions or organic solvents are applied to the surface of the masonry or paving stones. In general, the use of an organic solvent results in better penetration of the coating into the surface achieved.

The water vapor permeability of the films obtained from the coating compositions according to the invention are between 100 g HPO / m "/ 24 hours / mil and 3500 g H ₂ 0 / m ^2/24 hours / mil (1 mil = 0.0254 mm).

coatings, which are predominantly based on lower alkoxyethyl acrylate

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or methacrylate based, show very low absorption and still keep a water vapor transmission rate of, for example 2000 g / m ^2/24 hours / mil.

Coatings made of polymers with a predominant proportion of low Hydroxyalkyl acrylate or methacrylate swell in the presence of water and have water vapor permeabilities in excess of 3000 g / mV24 hours / mil. Because of this swelling microscopic openings in the coatings are closed, which can occur when used on rough or porous surfaces. ■

I ₁ J ₁ general coatings of the invention are applied so that they (0.00254 to 0.0762 mm) yield after drying a film of 0.1 to 3 mil thickness. For economic reasons and in order not to alter the appearance of the treated surfaces, the coatings are preferably only applied in film thicknesses of 1 mil (0.0254 mm) or less.

It should be noted, however, that most of the coatings naturally penetrate the porous surface of the masonry, building or Plaster penetrate, so that in many cases on the Surface even remaining coating is extremely thin.

In the present description, the term masonry is used to describe the known types of bound aggregate

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materials, e.g. clay bricks or other bricks, cinder blocks, Cinder blocks, concrete blocks, blocks made of other aggregates, concrete, cement or stone walls, masonry buildings, Masonry edging, e.g. made of concrete or cement, blocks made of small stones, stucco, cement blocks or walls or ceilings understood from masonry and the like. Roads, taxiways, tennis courts, Understood footpaths, stairs and floors or the like made of concrete or cement.

In the present description, buildings are used as warehouses, houses, apartments, office buildings, garages, barns, department stores and the like understood. These buildings have no submerged parts and are at least larger by their size Part of the atmosphere, i.e. air, rain, heat, cold, light and, in general, snow. Usually are Such buildings are also exposed to frost temperatures, i.e. temperatures below 0 C, from time to time. Of course, this also applies for paving. A smaller part of the building can do this Of course, they can also be used as a foundation or the like under the surface of the earth.

The outer walls of the buildings can be made of cast concrete, stone, brick or precast concrete, e.g. in the form of blind walls, exist. The invention is of particular value for large people

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Buildings, e.g. office buildings and apartment buildings with 5, 10, 15 or more floors.

In addition to the advantages mentioned above, the hydrophilic coatings according to the invention also contribute to the prevention of cracking in concrete or cement surfaces due to the expansion of trapped water during freezing.

The coating is normally applied to the outer side of the masonry, building or paving work, but can in individual devices, eg _o bricks or blocks, also be applied to all surfaces.

The presence of small amounts of crosslinking agents such as ethylene glycol diacrylate and ethylene glycol dimethacrylate, which may be present, for example, as impurities from the production of the hydrophilic monomers, is permissible as long as they do not interfere with the application of the polymer from aqueous dispersions or dispersions in organic solvents.

The invention can best be understood from the accompanying drawings; show it

Figure 1 - a wall block according to the invention in perspective

View, partly in section; Figure 2 - a treated according to the invention concrete pavement in Vertical section j

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Figure 3 - a part of a treated according to the invention

Building in elevation}
Figure 4 - a section through the part of the building shown in Figure 3 at 4-4.

The wall block shown in Figure 1 consists of a conventional one Loichtbetonblock 2 with a coating 4 from a Hydroxyethyl methacrylate (HÄMA) polymers. For clarification the thickness of the coating is greatly exaggerated.

In Figure 2 is a concrete road 6 with a coating 8 made of a copolymer of Hydro xyä thylme methacrylate (HÄ'MA) and Methyl methacrylate (MMA) (70:30) on the road surface shown. The thickness of the coating is shown greatly exaggerated.

Due to the porous nature of the concrete, the HÄMA-Polyrcere penetrates or the HÄMA-MMA copolymers - which is not in the drawings is shown - penetrates different depths into the concrete surface and is held firmly on it, leaving only a thin film of the Coating remains on the surface itself. The hydrophilic coating also prevents the concrete pavement (as well as Wall elements) are attacked by salts, e.g. sodium chloride and calcium chloride.

In Figures 3 and 4, a part of an apartment house 14 is with

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a pre-cast outer wall 16 is shown which has a number of windows 18 has. The outer surface of the concrete wall is with a thin (about 1 mil) coating 20 of HÄMA polymer ver ~ see. If necessary, a coating of the same HAliflA polymer can also be applied to the inner and / or outer surface of the pen When the windows are treated in this way, the polymer acts as a means of preventing fogging (See U.S. Patents 3,488,215 and 3,515,579). This is of course a different function than when applied to the Surface of porous concrete or cement exterior walls.

Unless otherwise noted, all quantitative data in the present description relate to parts or percentages the weight.

IM the surfaces of concrete pavement, buildings or masonry To protect against attack by bacteria or fungi or other microorganisms can be used as a coating A bactericide or fungicide, for example in amounts of 0.1 to 35 $ of the polymer, can be incorporated into the polymers to be applied. The bactericide or fungicide is included in the polymer coating so that it can be washed out, i.e. it is in the presence of Water released slowly.

Suitable bactericides are, for example, trimethylbenzylammoniurachloride, Hexadecyl-dimethyl-propyl-ammonium chloride,

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Cetyl pyridinium chloride, hexachlorophene, streptomycin, Salicylic acid, 4-nonylresorcinol, penicillin, aureomycin, Chlorniycetin, merthiolate, sulfanilimide, sulfathiazole, 2,3,6-trichlorophenol and 2,2'-methylenebis (4-chlorophenol). ' Suitable fungicides are "for example methyl 1- (butylcarbamoyl) -2-benzimidazole carbamate, N-trichloromethylthio-4-eyclo - hexene-1,2-dicarboxiniid, phenyl arsenic oxide, phenyl mercury alicylate, Methyl mercury 2,3-dihydroxypropyl mercaptide, methyl mercury acetate, N-CÄ'thylmercury, J-p-toluenesulfonanilide, Chloranil, 1,4-DiChIOr ^, 5-dimethoxybenzene, copper carbonate, Copper oleate, basic cupric chloride, cuprooxides, 3 ~ [2- (3,5-dimethyl-2-oxo cyclohexyl) -2-hydroxyethyl] glutarimide, 2,4,5,6-tetrachloroisophthalonitrile, tetrahydro-3,5-dimethyl ~ 2H-1,3,5-thiadiazin-2-thione, 2,6-dichloro-4-nitroaniline, p-dimethylaminobenzene diazo-sodium sulfonate, bis (n-propylaulfonyl) ethylene (B-1843), 2,3-dichloro-1,4-naphthoquinone, cis-N - [. (1,1,2,2-tetrachloroethyl) thioj -4-cyclohexene-i, 2-dicarboximide, the coordination product of zinc and manganese ethylene bisdithiocarbamate (Dithane M-45), a mixture of nickel sul ^ fat and Manganoethylene bisidithiocarbamate) (Dithane S ~ 31), Dodecylguanidine acetate, 2,4-dichloro-6- (o-cliloraniline) -s-triazine, Sodium ethyl mercurithio cylate, 3,4,5,6,7,7-hexachloro-N- (äthylmercuri) -i, 2,3,6-tetrahydro-3,6-endo-metha ^ ophthalimide, Perri-dimethyl-dithiocarbamate, N- (trichloromethylthio) phthal ~ imide, 2 »heptadecyl ~ imidazoline acetate, grioeofulvin, hexachlorobenzene, i-chloro-2-nitropropane, manganoethylon biscarbamate,

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3,4,5,6,7, T-hexachlor-N-Cmethylmercuri) -1,2,3,6-tetrahydro-3,6-endo-methanophthalimide, Mercury chloride, sodium methyldithioearbamate, 6-methyl-2,3-quinoxaline-dithiol-cyclo-S, S-dithiocarbonate, Disodium ethylene bisCdithiocarbamate), a mixture of manganese dimethyl dithiocarbamate and mercaptobenzo thiazole (Kiacide), methylmercury-e-hydroxy-quinoline, 2-phenylphenol, methylmercury dicyandiamide, phenylmercuritriethanol ammonium lactate, Pentaehiornitro-benzene, phenyl mercury urea, 3- (2-methyl-piperdino) -propyl-3,4-dichlorobenzoate, 2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiin-4-dioxide, Phenyl mercuric acetate, polyram, 8-hydroxyquinoline sulfate, a mixture of Hydroxymercuri-nitrophenol and Hydroxymercurichlorophenol, sulfur, 5-Xthoxy-3-triehlomethyl-1,2,4-thiadiazole, 1,2,4,5 ~ Tetracl: possibly> r-3-nitrobenzene, bis (dimethylthiocarbamoyl) disulfide, 3,5,6-tricloro-o-anisic acid, triphenyltin hydroxide, 2,3-dihydro-5-carboxanilido-6-methyl-1,4-oxathiine, Zinc ethylene bisdithiocarbamate, zinc dimethyl dithiocarbamate and Lauryliso quinoline bromide.

The polymers used for the purposes according to the invention not only have the necessary water vapor permeability but are also durable and weatherproof and adhere well to the surface of masonry, e.g. buildings, and concrete paving. They prevent concrete or stone from crumbling due to moisture in the masonry or paving and not only avoid the adverse effects

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sealing coatings, but also delay or prevent the penetration of water or substances carried along by the water into concrete, stone or other wall or paved surfaces. They also prevent or delay the attack of salts such as calcium chloride and sodium chloride.

The polymers used in the coatings according to the invention are not water-soluble. To improve durability however, it is often advantageous to cure or crosslink the coating after it has been applied Way.

One method is, for example, that about 1 to 20 wt. ^, Preferably about 2 to 10 wt. ^, One polymerizable äthyleniech unsaturated mono- or polycarboxylic acid or a partial ester of an ethylenically unsaturated polycarboxylic acid is added.

As ethylenically unsaturated acids, acrylic acid, cinnamic acid, crotonic acid, methacrylic acid, itaconic acid, aconitic acid, Maleic acid, fumaric acid, mesaconic acid or citraconic acid can be used. Ethylenically unsaturated as a partial ester Acids can be mono-2-hydroxypropyl itaconate, mono-2-hydroxyethyl itaconate, Mono-2-hydroxyethyl citracoiiat, mono-2-hydroxypropyl aconitate, Mono-2-hydroxyethyl maleate, mono-2-hydroxypropyl fumarate, Monomethyl itaconate, monoethyl itaconate,

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the monomethyl oleosolve ester of itaconic acid (methyl cello solve is the monomethyl ester of diethylene glycol) or the monomethyl cellosolve ester of maleic acid will.

The calcium ions or other polyvalent metal ions contained in the mortar or concrete then react with the ones present Carboxyl functionality with the formation of insoluble bridges between the polymer chains o

Another method "is to use an oxidizing Hardening agents such as sodium7 potassium or ammonium chromate or, -dichromate adds, for example in amounts of 0.1 to 5 $ and preferably $ 0.2 to $ 1 based on the polymer in the Coating compound. Such additives cause crosslinking or hardening of the coating under the action of sunlight.

If the coatings according to the invention are used without further additives of dyes, pigments or the like, they do not lead to any visible change in the surfaces to which they are applied, if colored against them or if you want to apply pigmented coatings, you can do this in the usual way, for example by using substances such as Titanium dioxide, phthalocyanine blue, lead red or chrome yellow too the polymer solution gives.

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The following examples serve to explain the invention in more detail.

example 1

A glass-lined reaction vessel was filled with 100 kg of hydroxyethyl methacrylate, 400 kg of ethanol and 125 g Azo-bis-isobutyronitrile charged, heated quickly to 80 ° C and stirred for 5 hours at this temperature. After this By time, a 92% conversion to polymer was achieved.

The polymer solution obtained was with a mixture of Ethanol and Methyl-Cello solve in a ratio of 5Οϊ5Ο on one Polymer content of $ 5 diluted and placed on part of a wall sprayed from concrete blocks into a film which, when dry, was 0.3 mil (0.00762 mm) thick. The coating quickly penetrated the concrete surface and was no longer visible after drying.

Then the part of the wall provided with the coating and an untreated part of the wall were sprayed with water. The den The area exhibiting a coating was colored darker visibly more slowly by penetrating water than the untreated area Area and dried about twice after spraying water as fast as the untreated area.

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Example 2

Example 1 was repeated with a feed of the reaction vessel of 70 kg Hydroxyäthylmethaerylat _T 30 kg of methyl methacrylate and 400 kg ethanol repeated. The polymerization initiator was the same «After 6 hours a conversion of $ 95 had been achieved.

When using this product after dilution to a concentration of $ 5 with a mixture of ethanol and 50:50 methyl cellosolve for injecting one By coating on a concrete block and a concrete pavement, practically the same results as above were obtained.

Example 3

Example 2 was carried out using a monomer batch of 75 kg of hydroxypropyl acrylate and 25 kg of butyl acrylate weighing 400 kg Ethanol repeated. When using the solution obtained for applying a coating to a cinder block and on a cement footpath, practically the same results as above were obtained.

Example 4

The polymerization according to Example 1 was carried out with a batch of 50 kg of ethoxyethyl methacrylate and 50 kg of methoxyethyl methacrylate and 350 kg of ethyl acetate repeatedly. After 16 hours

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at 7O ⁰ C, a conversion of 98 ^ was reached. The polymer solution was diluted to a pesticide content of $ 20 with Methyl-Cello solve and sprayed onto a subterranean wall of cast concrete to form a PiIm, which after drying had a thickness of about 1 mil. This coating formed an effective protection against the seepage of water.

Example 5

Example 1 was made using a monomer formulation of 80 kg of hydroxyethyl methacrylate and 20 kg of methacrylonitrile repeated. After a polymerization time of 5 hours a conversion of $ 94 was achieved.

When using the solution diluted to 5 $ as in Example 1 for spraying a coating onto a concrete block, results similar to the above were obtained.

Example 6

The diluted polymer solution from Example 1 was treated with 0.7 parts of ammonium dichromate per 100 parts of resin (based on Polymer solids). The dichromate-containing solution was sprayed onto a precast concrete slab and allowed to dry calmly. After 30 minutes, the coating could not be removed with methyl cellosolve, which was a sign that that crosslinking or hardening of the coating had taken place.

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This coating showed the same behavior in terms of water penetration and drying speed as the coating according to example 1 «

Example 7

A glass-lined reaction vessel was charged with 50 kg of ethoxyethyl methacrylate, 20 kg of hydroxyethyl methacrylate and 10 kg of methacrylic acid. For this approach, the solution was added 150 kg methyl cellosolve and 'heated to 90 ⁰ C. Then, 250 g was added terteButylperoctoat and the mixture stirred at 90 ⁰ C for 6 hours; after this time a conversion to polymer of 93% was achieved.

The polymer solution was with ethanol to a concentration of Diluted 10 ^ and sprayed onto a fresh concrete surface. After 10 days, the coating could no longer be removed with Methyl-Cello solve, which was a sign that crosslinking was taking place had taken place, presumably by reaction with C al c i uiiiion nen.

Example 8

A sample of 10 kg of the undiluted reaction product from Example 1 was added together with 0.5 kg of finely divided clay pigment and 0.25 kg of titanium dioxide in a ball mill ^ in which the mixture was ground for 6 hours ₀

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Then the mixture was with a mixture of methyl cello solve and ethanol in the ratio 5050 to a solids content of $ 15 thinned and painted on a brick wall surface. It a permanent, non-peeling white paint was obtained »

Example 9

The procedure of Example 2 was repeated, but was the solution based on the polymer weight with 1? £ bis (n ~ propylsulfonyl) ethylene (B-1843) and 1 $ hexachlorophene added. The coated concrete block and the coated concrete pavement showed due to the slow continued release of the im Polymers included bis (n-propylsulfonyl) -ethylene3 and Hexachlorophene has increased resistance to attack by microorganisms.

The polymers produced according to Examples 1 to 7 They were also suitable as protective coatings for the outer walls made of precast concrete or cast concrete on commercial and Apartment houses.

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Claims (1)

Claims 1. Construction units, in particular individual masonry elements, Masonry edging and building exterior walls, which do not include any submerged parts and at least with are exposed to the greater part of the weather, characterized in that they are at least on their outer surfaces with durable, weatherproof, water vapor permeable Coatings made of water-insoluble hydrophilic polymers from the group of polymers of hydrophilic hydroxyalkyl acrylates, Bydroxyalkylmethacrylaten, Hydroxyalkoxyalkylaerylaten, Hydroxyalkoxyalkyl methacrylates, Alkoxyalkylaeryiaten and alkoxyalkyl methacrylates each having lower Alkoxy and lower alkyl groups are provided, which ρ a water vapor permeability of 100 g ^ O per H each 24 hours per mil (0.0254 mm) Ms have 3500 g H ₂ O per m ² per 24 hours per mil and inhibit the penetration of water and substances carried along by the water into the surface of the structural units. 2ο unit according to claim 1, characterized in that it is overcoated 0.1 to 3 mil (0.00254 to 0.0762 mm) thick when dry. 209839/1113 3. Assembly according to claim 1, characterized in that it is coated with a polymer from the group the (a) homopolymers of the hydrophilic acrylates or Methacrylates, (b) copolymers of hydrophilic acrylates or methacrylates with one another, (c) copolymers of hydrophilic acrylates or methacrylates with up to $ 50 other hydrophilic polymerizable monomers and (d) Copolymers of the hydrophilic acrylates or methacrylates with up to 60% of a copolymerizable hydrophobic monomer in the case of a hydroxyalkyl-containing hydrophilic monomer or up to 50% of a copolymerizable monomer in the case of an alkoxyalkyl-containing hydrophilic monomer. 4. Unit according to claim 3, characterized in that the polymer is crosslinked. 5. Assembly according to claim 4, characterized in that the crosslinking by reaction (i) one with the hydrophilic Acrylate or methacrylate monomers used copolymerizable carboxyl group-containing monomers with (2) polyvalent metal ions present in the masonry is achieved. 6. Unit according to claim 4, characterized in that the crosslinking by an alkali or ammonium chromate or dichromate is reached. 209839/1113 7. Assembly according to claim '1, characterized in that the hydrophilic polymer is a polymer from the group of polymers of hydroxyethyl acrylate, hydroxyethyl methacrylate, Hydroxypropyl acrylate, hydroxypropyl methacrylate, methoxyethyl acrylate, Methoxyethyl methacrylate, A'thoxyäthylacrylat and A'thoxyäthylmethacrylat is. 8. Unit according to claim 1, characterized in that it is a masonry element. 9. Unit according to claim 8, characterized in that it consists of stone held together by mortar. 10. Assembly according to claim 8, characterized in that it consists of adobe bricks. 11. Unit according to claim 8, characterized in that it consists of "concrete block". 12. Assembly according to claim 8, characterized in that it consists of cinder block ". 13. Unit according to claim 8, characterized in that it is made of cinder block. 14. Unit according to claim 8, characterized in that it consists of Zernentblock. 209839/1 113 ' 15. Unit according to claim 1, characterized in that it is a concrete or cement surround. 16. Unit according to claim 1, characterized in that it has a building outer wall 13t and the coating for Vermin ~ serves to reduce the damaging effects of rain, snow and frost on the wall. 17. Unit according to claim 16, characterized in that the wall has windows and at least one surface of the window is also covered with a hydrophilic coating Polymers to prevent fogging is provided. 18. Unit according to claim 16, characterized in that the building is an apartment house. 19 · Unit according to claim 16, characterized in that the building is a tall office block. 20 _e structural unit according to claim 1, characterized in that it contains a bactericide or fungicide which can be washed out in the hydrophilic polymer 21 «unit according to claim 1, characterized in that it is a unit from the group of bricks, blocks and borders. 209839/1 1 13 22. Unit according to claim 3, characterized in that the polymer is a homopolymer. 23 »Unit according to claim 3, characterized in that the polymer is a copolymer of a hydrophilic acrylate or methacrylate with a hydrophobic monomer such as a lower alkyl acrylate or methacrylate, yinyl chloride or fluoride, vinylidene chloride or fluoride, vinyl acetate, Vinyl propionate, vinyibutyrate, styrene, methyl styrene, acrylonitrile or methacrylonitrile is o 24. A method for producing a structural unit according to claim 1, characterized in that the polymer is used as an aqueous dispersion or from an organic solvent applies to the assembly. 25. The method according to claim 24, characterized in that the polymer is in an organic solvent. loosely applies. 26. The method according to claim 24, characterized in that an alkali or ammonium chromate is added to the polymer composition or dichromate as a curing agent for the polymer. 209839/1113 27. Pavement works, in particular cement pavement, characterized in that that their surface is covered with a permanent, weather-resistant, water-vapor-permeable coating water-insoluble hydrophilic polymers from the group of polymers of hydrophilic hydroxyalkyl acrylates, hydroxyalkyl methacrylates, Hydroxyalkoxyalkyl acrylates, hydroxyalkoxyalkyl methacrylates, Alkoxyalkyl acrylates and alkoxyalkyl methacrylates with lower alkoxy and lower Alkyl groups is provided. 28. Paving according to claim 27, characterized in that the coating has a water vapor permeability of 100 g 1 ^ 0 per m ² per 24 hours per mil (0.0254 mm) to 3500 g H ₂ O per ² per 24 hours per mil and inhibits the penetration of water and substances carried along by the water into the surface of the plaster. 29. The pavement of claim 28, characterized in that it is 0.1 to 3 mil (0.00254 up to 0.0762 ram) thick coating is provided. 30. Pavement according to claim 27, characterized in that e3 with a coating of a polymer from the group the (a) homopolymers of the hydrophilic acrylates or methacrylates, (b) copolymers of the hydrophilic acrylates or 209839/1113 Methacrylates with one another, (c) CopoTymeren of the hydrophilic acrylates or methacrylates with Ms to 50fo of other hydrophilic polymerizable monomers and (d.) -Opolymers of the hydrophilic acrylates or methacrylates with up to ίζώ. $ 60 of a copolymer! hydi-ophobic monomers capable of being converted "in the case of a hydroxyalkyl-containing hydrophilic monomer or a proportion of 5% * of a copolymerizable monomer" in the case of alkoxyalkyl-containing nyrophilic monomers " 31. Plaster purpose according to claim 3O _9, characterized in that the polymer is crosslinked. 32 »Pavement according to claim 31, characterized in that the Yemetzurig by reacting (i) one with the hydro ~ philic acrylate or methacrylate monomers used copolymerizable eartioxyl-containing monomers with (2) metal ions that are more or less present in the Pflaaterwerk is reached. 33, paving according to claim 31, characterized in that the crosslinking by an alkali or aluminum chromate or -dichromate is reached. 34. Pavement according to claim 28, characterized in that it is a polymer from the group as the hydrophilic polymer the polymers of hydroxyethyl acrylate, hydroxyethyl meth- 2 098 39/1113 acrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, Methoxyethyl acrylate, methoxyethyl methacrylate, ethoxyethyl acrylate and Ä'thoxyäthylmethacrylat contains. 35. paving according to claim 27, characterized in that it has salt on its surface and the coating reflects the harmful effects of the salt on the pavement reduced. $ 6. Pavement according to claim 35, characterized in that the salt consists of sodium chloride or calcium chloride. 37 · Pavement according to claim 36, characterized in that it's an eating clay plaster. 38. paving according to claim 27, characterized in that it's a concrete road. 39. Paving according to claim 38, characterized in that the coating has a water vapor permeability of 100 g HpO per m ² per 24 hours per mil to 3500 g H ₂ O per m ² per 24 hours per mil. 40. Pavement according to claim 39, characterized in that the polymer is a polymer from the group of polymers of hydroxyethyl acrylate, hydroxyethyl methyl acrylate, hydroxy 209839/1113 propyl acrylate, hydroxypropyl methacrylate, methoxyethyl acrylate, Methoxyethyl methacrylate, ethoxyethyl acrylate and Ethoxyethyl methacrylate is. ο Pavement according to claim 28, characterized in that it contains a bactericide or fungicide which can be washed out in the hydrophilic polymer. 4-2ο method for Herateilung a paving plant according to claim 27, characterized in that the polymer is applied as an aqueous dispersion or of an organic solvent to the paver plant ₀ 43 · Method according to claim 42 ', characterized in that the polymer is applied dissolved in an organic solvent. 44. The method according to claim 42, characterized in that one uses a polymer mass which _s is an alkali or ammonium chromate or dichromate as a curing agent for the polymers. 45 · Pavement according to claim 28, characterized in that the hydrophilic polymer is a hydroxyethyl methacrylate polymer is. 209 8 39/11 13 46. paving according to claim 3?., Characterized in that the carboxyl group-containing monomer in one on the total monomers amount from 1 to 20? £ is present. 47. paving according to claim 28, characterized in that the coating consists essentially of the hydrophilic polymer consists. 43, paving according to claim 47, characterized in that the polymer consists of a polymer from the group of (a)
Homopolymers of the hydrophilic acrylates or methacrylates _f
(b) Copolymers of hydrophilic acrylates or "methacrylates with one another, (c) copolymers of hydrophilic acrylates
or methacrylates with up to 50 $ of other hydrophilic polymerizable monomers and (d) copolymers of the hydrophilic acrylates or methacrylates with up to 60 $ of a copolymerizable hydrophobic monomer in the case of a hydroxyalkyl-containing hydrophilic monomer and up to 50 ^ copolymer! -
sable monomers in the case of an alkoxyalkyl-containing hydrophilic monomer. 49 «paving according to claim 48, characterized in that the polymer is crosslinked. 2 0 9 8 3 9/1113 BATH ORIGINAL Le e rs e 11 e