CS207108B1 - Means for fungicide protection of the building constructions - Google Patents

Description

CZECHOSLOVAKIASOCIALISTREPUBLIC (1S)

COPYRIGHT CERTIFICATE DESCRIPTION 207 108 (11) (Bl)

(61) (23) Exhibition Priority (22) Registered 12 79 (21) PV 8653-79 (51) Int. Cl.5 g 04 B 1/64 // E 04 B 1/70 // E 04 B 1/72

OFFICE OFFICE

& DISCOVERY (40) Published 15 09 80 (45) Published 01 11 83 (75)

The inventor

SEQUENS JAN ing., HLUSIČKA JOSEF ing., And ČERNOHORSKÝ VLADIMÍR iag., PRAGUE (54) Means for fungicidal protection of building structures 1

BACKGROUND OF THE INVENTION The present invention relates to a composition for providing fungicidal protection of building structures which can be applied by painting, spraying or rolling.

Various compositions of varying intensity and duration are used for the fungicidal protection of building structures. Sprays based on inorganic salts such as copper (II) sulfate are very poorly effective. The weak fungicidal action of the lime is enhanced by the addition of water-insoluble preparations based on, for example, tetramethylthiuram disulfide or by the preparation of water-soluble substances, eg based on organotin compounds.

These methods have a number of disadvantages. The combination of lime with tetramethyl-hiuramdisulphide (TMTL) has a very uneven effect on application, because of the sedimentation of the TMTD in the vessel, both during painting and during spraying. The fungicidal effect of TMTD only causes contact on the structure surface, practically only in the application thickness of the layer (0.2 - 1.0 mm), the depth effect is minimal. However, the duration of the fungicidal effect is maintained throughout the period of coating or spraying on the surface of the structure. Lime-based coatings with water-soluble fungicides have a different effect. The water-soluble formulations guarantee a homogeneous dispersion of the fungicide in the coating or spray material and, due to their penetration with water, also have a deep effect, but due to their corrosion resistance, they gradually wash out of the coating layer and gradually decrease their concentration below the effective level. 207 108 207 108 In practice, this results in a relatively rapid decrease in fungicidal effects.

The aforementioned disadvantages are eliminated by the composition according to the invention, which consists in the application of a mass consisting of 5 to 50 wt. an aqueous polymer dispersion of, for example, styrene-acrylate, methylmethacrylate, vinyl acetate, vinyl acetate-acrylate, and the like, containing 25 to 70 wt. % of the polymer, 0.5 to 5 wt. a water-soluble or water-dispersible fungicidal composition in the form of non-sedimenting moieties such as tributyltin hydroxide or tributyltin acetate dissolved in the ketone mixture. This preparation is dispersed homogeneously in the mass. Preferably, the composition further comprises 10 to 35 wt. calcium hydroxide in the form of lime milk and a slurry of 10 to 60% by weight, further for adjusting the rheological properties of the material to 0.5 to 5% by weight. finely ground clay rocks such as bentonite or halloyite or amorphous silica, further from 0.1 to 5 wt. a pigment resisting the action of other components of the mass, e.g., iron or chromium based pigments, and 1 to 40 wt. a finely divided inert filler having a grain size of 0.0001 to 1.0 mm, e.g., micronized limestone, kaolin, talc. By applying such a paint or spray composition, long-term efficacy, the ability to penetrate both the active substance and the surface of the structure and solid anchoring of the fungicide throughout the active zone is achieved.

The compositions formulated in the sense of the present invention are applicable by conventional painting techniques, for example by brush or plush roller coating or by spraying with conventional paint sprayers. In conventional rooms, warehouses, etc., and in the room of a residential building, these finishes are sufficiently aesthetically effective. With a higher aesthetic appeal, it is possible to apply further surface thin-film or wallpaper-based finishes over these coatings.

The embodiment of the process according to the invention is illustrated by the following examples, which, however, do not limit the scope of the invention. Example 1

On the wall, which has been lime-caked over the plaster, the following composition is applied by spraying: water dispersion of methyl methacrylate softened with dibutyl phthalate with a polymer content of 40% by weight. .............. 25 wt. water-soluble fungicidal preparation of tributyltin dihydroxide in a mixture of ketones ........................................... ..... 1 wt. water ................................................. .......... 74% wt.

After drying, a water-insoluble polymeric skeleton comprising a homogeneously dispersed fungicide is formed, extending from the surface of the structure to a depth of about 2-3 mm under the surface of the original lime-patch coating. This treatment has long-term antifungal activity. 207 1 Example 2

The walls and ceilings of the vaulted cellar room, which are alternately damp in spring and autumn, are covered with matter of the following composition: lime mash in the suana 3? % wt ....................... 50% wt. aqueous dispersion of styrene-2-ethyl-hexylacrylate copolymer with a polymer component content of 51% by weight .......... 12% by weight bentonite natrified ............................... 2% wt. fungicidal water-soluble preparation of tributyltin acetate in a mixture of ketones ........................................... 1 wt. water ...................... - · -. ·. . . .. ............... 35% by weight p With a mass consumption of approx. 1-1.5 kg / m in a double coat, the aesthetically similar surface finish has a painterly character (similar to whitening) and has a long-lasting fungicidal effect. Example 3

The walls and ceilings of the room, kept as a storage space, were coated with the following composition: aqueous dispersion of styrene - 2 - ethylhexylacrylate copolymer with a copolymer content of about 50% by weight. 7% wt. carbide lime solids 40% w / w ........... 30% w / w. iron-red brick-red pigment ....... 1 wt. talc ground ........................................... 15% wt. float kaolin ............................................ 20% wt. water ................................................. 25% by weight. a fungicidal preparation of tributyltin hydroxide in a mixture of ketones. a total of 100 wt. The coating has a long-lasting fungicidal effect and an aesthetic effective painter's character.

The following facts have been found by comparing the effectiveness of the composition according to the invention with the hitherto used methods of protection in damp basement rooms. Without protection, the brickwork was covered with mold within 3 weeks and blackened. The lime white surface showed the first signs of mold infestation after 30 days and after 3 months it was necessary to make a new bleach. The lime + TMTD surface area also showed signs of fungal attack after 30 days, but the further spread was much slower, so that the new whitening could only be done after 1 year. The area treated with the composition according to the invention showed the first signs of infestation after 28 months of application and the coating has not been renewed so that it has been operating for 5 years. (The effects of the compositions of Examples 1, 2 and 3 are equivalent.)

Claims (1)

The composition according to the invention can be used in residential, civil and industrial construction of existing buildings, where it is necessary to perform fungicidal protection even on newly built buildings as a preventive measure in basements and cellar rooms. BACKGROUND OF THE INVENTION A composition for fungicidal protection of building structures, which can be applied by brushing, spraying or rolling, characterized in that it comprises 5 to 50 wt. % of an aqueous dispersion polymer such as styrene-acrylate, methyl methacrylate, vinyl acetate, vinyl acetate-acrylate containing from 25 to 70 wt. % of the polymer, 0.5 to 5 wt. a water-soluble or water-dispersible fungicidal composition in the form of non-sedimenting particles such as tributyltin hydroxide or tributyltin acetate dissolved in a mixture of ketones which is homogeneously dispersed in the mass and water, preferably further comprising 10 to 35% by weight calcium hydroxide , lime milk and a slurry with a dry weight of 10 to 60 wt.%, 0.5 to 5 wt. finely ground clay rocks such as bentonite or halloyite or amorphous silicon dioxide to modify the rheological properties of the material, 0.1 to 5% by weight of the pigment, resisting the action of other constituents of the mass, e.g. % to 40 wt. a finely divided inert filler having a size of 0.0001 to 1.0 mm, e.g., micronised limestone, kaolin, talc. Printed by Moravské tiskařské závody, provoz 12, Leninova 21, Olomouc Price: 2,40 Kčs