HU198749B - Process for terminating fungoid growth on wall surfaces and for protecting them against fungoid growth - Google Patents

Abstract

A multicomponent system which prevents and eliminates fungal growth on wall surfaces consists of a fungicide primer, an undercoat and a topcoat. All three contain fungicides and fungistats of varying degrees of solubilities.

Description

FIELD OF THE INVENTION The present invention relates to a process for preventing fungal buildup on walls of buildings, and for removing fungal buildup and maintaining a fungal-free condition for a longer period of time.

It is known that fungal buildup on the walls of buildings is a serious problem.

Not only do fungi form colorful stains on wall surfaces, they cause damage to the appearance of the living space, but in many cases, due to their strong, penetrating, unpleasant odor, they also impair the well-being of the occupants. Certain fungi also pose a human health problem and due to hygiene considerations, it is important to prevent the development of fungi and to prevent the development of fungal infections.

With the help of air flow, the fungal elements (hyphae, spores) on the surfaces can germinate only in the presence of moisture. The required moisture in liquid form is provided by the moist surface or the humidity of the air.

The fungus! In the process, fungi (such as Alternaria, Cladosporium, Pullularia) that require lower moisture content and minimal nutrients first begin to grow. By colonizing them, they increase surface moisture and promote the establishment of other fungi (such as Aspergillus, Aureobasidenni, Caolida, Penicillium, Scopulariopsis, Torula).

Many fungicides are used in the literature, the vast majority of which are used in plant protection. Mercury and arsenic compounds, and later pentachlorophenol (PCP) fungicides, were most commonly used to eliminate fungal fungi. The use of these agents is not possible due to their toxicological properties.

Preparations which are also effective against molds in buildings are known.

In U.S. Patent No. 1,542,946, organic tin compounds, e.g. poly (tripropyltin acrylate) is used in a solvent medium as an antifouling coating.

US Patent No. 2,615,662 for the protection of aqueous adhesives and dyes

2,2-Bis (methylaminocarbonyl) diphenyl disulfide is proposed.

US Patent 2,129,524 and US Patent 2,128,705 use phenylhydrazonoimidazoline as an effective fungicide.

The patents listed are generally based on the protective effect of an active ingredient belonging to a group of compounds, and thus the dissolution rate of the active ingredient determines the life of the coating.

The fungal flora on the surfaces of buildings and the rate of fungal growth are influenced, among other things, by the type of binder used in the wall and its chemical structure.

Among the most commonly used wall paints, glue paints are prone to fungal growth as their binder serves as a nutrient source for certain fungi.

Lime painting has long been used as a so-called .infectant, but its fungicidal activity is short lived. Lime staining only prevents the fungi from settling, while it is strongly alkaline and ineffective when carbonisation is complete.

Coatings made of oil and oil-in-kid resin-based wall paints are also not suitable for fungal inhibition, since binders made from vegetable oils can serve as a nutrient source for fungal formation.

Emulsion wall paints also generally contain the nutrient components of the fungus, so they are susceptible to fungal growth when the fungus conditions are maintained. The choice of binder type is thus important, since some of the dispersions are prone to, while others are less susceptible to fungal infections.

Some fungi, such as Fusarium, Chaetomium, Trichoderma, which breaks down cellulose, often appear on paper wallpapers. The rate of fungal growth is only increased by the use of cellulose-based wallpaper adhesives as a nutrient source.

In order to prevent or eliminate surface fungal infections, the presence of moisture is basically to be eliminated.

In many cases, this can only be achieved by retrofitting, modernizing buildings (such as heat insulation, plumbing, ventilation, heating, etc.) with a significant economic impact on buildings, or not at all.

In these cases, the only possible preventive solution is achieved with the use of biocidal gonial inhibitors or coatings (coating systems).

As in the coming period, due to the types of construction to be applied, the surface coating of the walls of the structures will continue to be the subject of paint coating (wallpapering), it is therefore extremely important to work on coatings with adequate biostability.

Current state of the art technology demands for biostable protective systems include:

- permanently, for at least one painting cycle, to ensure fungal-free operation,

- the substances used are environmentally friendly,

- be suitable for the prevention of fungal infections and for the elimination of an infection.

It is an object of the present invention to provide broad-spectrum, environmentally friendly, long-lasting protection

EN 198749 Β Development of a process for the formation of a protective fungicidal and fungostatic coating composition which can be used to eliminate or prevent fungal buildup on building wall surfaces.

Multi-component compositions comprising a fungicidal active ingredient, a primer and a paint binder, a pigment, a filler, and known paint auxiliaries, such as a fungicidal composition (A), a primer and a coating composition (B) by a process suitable for controlling and protecting the wall surfaces of the invention. (C), is applied successively to the surface to be treated in the usual manner.

Types of formulations include:

(A): 3 to 15% by weight of chloroacetamide or N-methylol chloroacetamide or these fungicidal agents (3-5): (1-2) with N- (3-chloroallyl) heximihium chloride or hexamethylenetetramine an aqueous solution of a mixture thereof; primer (B): 1-8 wt.% mixture of 2-methoxycarbonylbenzimidazole or 2-methoxycarbonylaminobenzimidazole and 2 n-octyl-4-isothiazolin-3-one, 20-50 wt. an acrylic copolymer dispersion having a particle size of up to 0.05 µm, 5-10 wt% dyeing aids and 75-32 wt% water, while the topcoat (C) is 1 to 6 wt% zinc dimethyldilocarbamate and

2-methoxycarbonylaminobenzimidazole (3-8): 1% by weight, 8 to 40% by weight aqueous dispersion of acrylic copolymer, 30 to 50% by weight of filler having a particle size of not more than 0.3 µm, preferably calcium carbonate, magnesium carbonate, barium sulfate, kaolin, magnesium silicate or a mixture thereof - from 7 to 20% by weight of alkali-resistant inorganic metal oxide pigments, from 0.1 to 3% by weight of a dyeing aid - which is sodium hexametaphosphate, cellulose-based thickener, white spirit, ethylene or propylene glycol,

It can be 2,2,4-trimethylpentanediol-1,3-monoisobutyrate and consists of 3 to 40% by weight water.

The fungicide component kills the surface or surface. vegetative spores and fungal elements in cracks, pores to a certain depth. The fungus kills in a short time and over a wide spectrum.

The primer exerts a fungostatic effect in two directions, thus destroying fungal elements in the surface cracks and deeper zones, if any, and replacing the fungostatic agent, which has been used up in the meantime, with the topcoat layer. This increases the service life of the coating system and eliminates the need for repainting for an extended period of time.

The primer contains 20-50% by weight of a small particle size (0.045 µm) dispersion binder, which provides impregnation to a sufficient depth, and 5-10 tX of auxiliary materials for the paint industry, such as antifoam, film-forming, spreading and wetting agents. The materials are of the same material quality as those referred to in the composition of the topcoat. '·' ·

The advantages of the process of the invention are summarized as follows:

- the fungicide is broad-spectrum, ie active against mold and yeast causing fungal fungi,

- effective against both vegetative fungal elements and fungal spores, absorbs to the surface pores and cracks to a sufficient depth and exerts a fungicidal action quickly (within a few hours),

- easy and safe to apply and apply,

- the primer can penetrate into the pores and gaps of the wall surface to be treated to a sufficient depth and adhere well; has a fungostatic effect, that is, it inhibits fungal growth, has a broad spectrum and long-lasting effect,

- Covering wall paints have a fungostatic effect, provide a broad, long-lasting effect, perform the function of wall painting, that is to say, in addition to color and aesthetic effects, they also provide protection functions.

Fungostatic substances used in primers and topcoats

- uniformly distributed in the coating,

- have a relatively low dissolution rate,

- the rate of dissolution is constant so that their contact with the fungi is constantly intense.

The present invention relates essentially to a coating system comprising a primer and a paint for preventive purposes; For moldy surfaces, antifungal coatings and paints can be applied by applying an antifungal coating. Thus, the coating is suitable for maintaining the fungal appearance of the walls of buildings for a long time even on exposed surfaces.

The efficacy of the coating system of the present invention for the elimination of fungal-contaminated wall surfaces, and for the application thereof. and the preparation of the composition are illustrated by examples:

Example 7

Apply 150 g / ηι ² , 250 g / m ² paint on the wall to eliminate fungus.

HU 198749 Β

1. Fungicide

the.) 5: 1 mixture of chloro-celamide and N- (3-chloro-allyl) -bexinium minium chloride in water 10% by weight 90% by weight b.) 10: 4 mixture of N-methylol chloroacetamide and hexamethylene letramine 3% by weight water 97% by weight c. 1 ' Chloroacetamide and 3: 1 mixture of N- (3-chloroallyl) -hex iminium chloride • 8% by weight water 92 BulkX d.) N-methylol klóracet- amide 15 massX water 85 massX

2. Primer

a.) Methyl methacrylate-bully-acrylate copolymer dispersion (0.045 µm particle size, 34% non-

illóanyaglartalniii) 40.0 weight percent 2n-4-okl.il izol.ia- quinazolin-3-οπ 3.2 weight percent 2-carboxy iiietóxi (Aiiiirio) -henziiiiitlaz.ol 0.8 would break gX ammonium hydroxide 0.2 weight percent hu lil-d iglikolacellál. 3.8 lömegX petroleum based antifoam 0.1 weight percent water 51.9 weight percent Methyl Methacrylates Dispersion of Rylate Butyl Acrylate Copolymer (0.045 µm particle size, 34X non-volatile) 20.0 töinegX 2-n-octyl-4-isothiazolin-3-one 1.0 weight percent 2-methoxycarbonyl-benz imidazole 0.25 massX am ammonium hi d roxid 3.0 massX Petroleum-based anti-foaming 0.2 weight percent water 75.35 massX Methyl methacrylate butyl acrylate copolymer dispersion (max. 0.08 µm) részecskeniéretű) 50.0 weight percent 5-chloro-2-okt.il-4-izot.iazolin-3-ori 6.4 lömegX 2-methoxycarbonyl-carbonyl-anii- no-benziinidazol 1.6 weight percent sodium hydroxide 0.2 LömegX propylene glycol 6.0 LömegX 2,2,4-penta- diol-l, 3-monoisobutyrate 2.0 LömegX petroleum based antifoam 0.5 LömegX water 33.3 weight percent

3. Paint

a.) Dispersion of styrene-butyl-acrylic copolymer (with 50% non-volatile content) 15% by weight of calcylcarbonyl 26% by weight of magnesium silicate 6% by weight of titanium dioxide 15% by weight of methyl hydroxy-ylcellulose 0.5% by weight of anionium polyacrylate 0.15 crowd%

Na-Beta-Methaphosphate 0.15% by weight

octyl alcohol 0.2 massX zinc-dimethyl-dithio carbamate 4 massX 2- me toxi-k ar bon il- aminobenzimidazol 1 massX aminón i u m- h i d rox i d 0.2 loxX white spirit 2.0 massX water 29.8 massX Styrene acrylate dis- period (50% inappropriate— anyagtartalonimal) 8.0 massX calcium carbonate 20.0 massX barium sulfate 6.0 massX Magnesium silicate 10.0 massX titanium dioxide 11.0 massX carboxymethylcellulose 0.5 massX ammonium polylates rilat 0.1 massX Sodium hexametaphosphate 0.1 massX mineral oil-based foam zásgátló 0.2 massX zinc-d-dimethyl-diliocks— brown 1.0 massX 2-carbomethoxy-benz imidazolo 0.3 massX am móri i u ni- h i d rox i d 0.15 massX white spirit 2.5 Weight x water 40.15 massX

The compositions of the above formulations are used in the following two variants to eliminate wall fungus after homogenization:

the. ) version

The infected, painted wall surface is mechanically cleaned and treated with fungicide 1. After 24 hours, the primer is applied with a brush, after 6 hours, coated with paint 3, and after drying (about 2 hours), a new coat of paint is applied.

b. l version

From the infected, wallpapered surface, the wallpaper is removed and washed, using a fungicide (1.d.). After 24 hours, primer 2.b) is applied, and after another 3 hours, paint 3b) is applied in one coat using a brush. The wallpaper is glued and after the glue has dried, the external surface of the wallpaper is treated with primer 2.1 ».). A wallpaper adhesive with a fungicide is recommended for gluing the wallpaper.

HU 198749 Β

Example 2 a.) Goinbait N-methylol klóracelamid 5 due to external conditions or expected effects in use. The composition according to the recoil is in the defined (killer, primer, paint) layer over the long term, over a wide spectrum, at economic and a 5: 1 mixture of N- (3-chloroallylheximinium chloride) 15 massX san and has a fungicidal and fungostatic action against fungi in an environmentally friendly manner. water 85 massX The anti-fungal paint coating is effective- the material to be used- 10 tests were performed. quantity b.) Primer Methyl methacrylate-butyl AK- 150 g / m ² 15 Example 4 Rooms exposed to aggressive climate (eg. grate copolymer dispersion (0.045 µm particle size) 45 massX food industry) on a new wall surface (concrete or plaster) according to Example 2.a) 2-n-octyl-4-isothiazoline -3-one 6.0 massX apply with a brush. After a standstill of 5-6 hours, the paint of Example 3.a. 2-methoxycarbonyl-amino-benz 20 with an hour's drying time, imidazole 1.5 massX Juk. ammonium hydroxide propylene glycol 0.2 massX 3.0 massX Biological Examples: Butyl diglycol acetate 0.8 massX water 43.3 massX 25 a.) Direct liquid culture assay a 3. Paint (for facade) to determine the efficacy of the fungicide

Methyl methacrylate butyl acrylate dispersion (50% non-volatile) calcium carbonate magnesium silicate ethyl hydroxyethyl cellulose ammonium (polyacrylate) sodium hexametaphosphate zinc dimethyl dithiocarbamate

2-methoxycarbonylbenzimidazole ethylene glycol ammonium hydroxide titanium dioxide

40.0 massX

26.0 massX 6.0 massX 0.5 massX 0.2 massX 0.2 massX

5.0 massX

1.0 massX 0.3 massX 0.3 massX 17.0 massX water 3.3 massX

The external facade is disinfected with the fungicide 1a) above, 200 g / m ² of primer 2b is applied and the paint is applied at 450 g / m ² .

Example 3

2. c.) Primer

3. a.) Paint composition

Example 2c) The interior wall surface is impregnated with a primer composition of 100-125 g / m ² , depending on the masonry material. With the paint 3.a) the masonry is coated in two layers. The coating system thus prepared provides preventive protection in an environment where the risk of infection is higher

Into the 30 9 cinnamon of the fungicide of Example 1a) was added 1 cm 2 of a spore suspension containing fungal elements in the order of 10 ⁶ from the following fungi:

Alternaria gypsohilum

Alternaria tenuis 35 Aspergillus candidus

Aspergillus diversus

Aspergillus flavus

Aspergillus fumisatus

Aspergillus niger 40 Aspergillus terreus

Aureobarideum sp.

Candida sp.

Cladosporium herbarum

Cladosporium elegant 45 Chaetomium globosum i

Chaetomium elata

Fusarium oxysporum

Fusarium graminearum

Mucor recemosus 50 Paecilomyc.es varioty

Penicillium ochro-chloron

Penicillium chrysogenum

Penicillium viridicatum

Pullularia pullulans 55 Trichoderma viride

Torula in a bull's eye

By re-breeding, we determined the number of surviving fungal elements and calculated the fungicidal efficacy relative to the initial germ number60:

HU 198749 Β

Fungicide Fungicide number / cm ³ Fungicidal efficiency

Affection u- Treatment Treatment after after LASIK 5 minutes 30 minutes 2.10 ⁵ 2.10 ³ 0 100%

b.) Testing at reference sites to determine the efficacy of the fungicide

In parallel with the laboratory tests, the fungicide of Example l.c.) was also tested by treating fungal wall surfaces.

The agent was applied to the fungal infected wall portions. Before and after treatment, the number of live fungal cells per 10 cc was determined by swab sampling.

mushroom Element number / cm ² fungicidal efficiency Treatment Treatment pre- post 210 0 100%

c.) Examination of the potency of the fungostatic effect:

In the course of the experiments, the preparation materials were applied to the complete Czapek-Dox nutrient agar surface infected with fungal spores. various varieties of fungicide, primer and topcoat.

Fungus Test:

Alternaria tenuis

Cladosporium harbarum

Aspergillus niger

Aureobasideum pullulans

Penicillium ochro-chloron

Trichoderma viride

After 28 days of incubation in the thermostat, the magnitude of the inhibition zone around the samples was determined.

Test sample Inhibition zone size (mm) 2, b) 25 Example 3a) top coat (2 coats) 14 The primer of Example 2.a) and top coat according to Example 3.a. (2 layers) 18

The greater inhibition zone of the primer is explained by the higher water solubility of the fungostatic compound than the fungostatic material added to the topcoat.

The size of the shading rings did not change for 14 days or even decreased to 28 days, so both the primer and topcoat proved to be effective.

Endurance test:

Samples of each component of the mycelium dye coating system were placed in a constant humidification climate chamber.

After 1, 2, 3 and 4 months of conditioning, the inhibition zone indicating the potency of the fungicides was determined by the test method described in Example 4c).

Sample Designation Inhibition Zone (mm)

initial state 1 2 3 4 Example 2b) Foundation 25 20 12 2 0 Example 3a) top coat (2 coats) 14 10 6 3 0

2.b.) primer and

3.a. (example no.

topcoat (2 layers) 18 15 10

Example 6

Surface infections:

Surface samples were prepared using test fungus dye coating system inoculated with fungal spore suspension. Fer-611

The strain of fungus described in Example 4a) was used for stitching. The infection was repeated weekly and evaluated visually under a stereomicroscope. During the evaluation, we determined how many weeks after 5 the fungal growth started after infection.

The incubation was carried out in a thermostat at 26 ± 1 ° C and above 95% relative humidity. 10

Under these conditions, one month incubation is approximately one year under natural conditions.

Designation of the pattern Onset of colonization after first infection 20 Example 2b) serinLi primer 8 weeks Example 3.a) SerinLi Topcoat (2 coats) 2.b.) primer and 12 weeks 25 3.a) topcoat (2 coats) 20 weeks 30

The test results of Examples 4c) and 5) clearly demonstrate the efficacy of the active compounds and the slow dissolution rate as required. It can be stated that the topcoats applied in two coats alone provide fungal control 40 for revenge, but when applied in combination with a primer, the efficiency increases by leaps and bounds.

Studies have also shown that, after several years of use, the fungostatic agent in the primer and which gradually diffuses into the topsheet is used to replace the active ingredient, which has been continuously dissolved from the Duvet.

Claims (1)

Patent Claim Point A process for controlling and protecting against fungal attack of wall surfaces by applying to a wall surface, optionally, N, chloroacetamide, or 3-15 1% aqueous solution of these fungicidal active compounds (3-5): (1-2) in N- (3-chloroallyl) -heximiniuin chloride or hexamethylenetetramine 0 -250 g / m ² followed by 1 to 8% by weight of 2-methoxycarbonylbenzimidazole or 2-methoxycarbonylaminobenzimidazole and 2 n-octyl-4-isothiazolin-3-one a solution of acrylic copolymer dispersion having a particle size of not more than 0.05 µm, 5-10% by weight of known other dye auxiliaries and water 50-300 g / m ² ; followed by a mixture of 1-6% by weight of zinc dimethyldithiocarbamate and 2-methoxycarbonylaminobenzimidazole (3: 8): 1% by weight, 8-40% by weight in an aqueous acrylic copolymer dispersion, 30-50% by weight up to 0%. consisting of 3 pm particle size filler, 7-20% by weight of alkali-resistant inorganic fémoxidpigmentekből, 0.1-3% by weight of other known paint industry auxiliary material, and 30 to 40% by weight of water was 150 to 500 g / m ² amount, in a known manner applied to the treated wall.