FI64761B - FOERFARANDE FOER BEHANDLING AV NYFAELLT ELLER NYSAOGAT TRAE SAT MEDEL FOER ANVAENDNING VID FOERFARANDET - Google Patents

Description

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National Board of Patents and Registration .......... ... ,, ,, „• (44) Date of publication and issue. -

Patent · och registentyrelsan 7 Ana & kan utUpl och utl.ikriften publicarad 30.09 * 83 (32) (33) (31) Requested ttuoikeus — Begird prlorltat 08.03 * 77

Denmark-Danmark (DK) 1012/77 (71) Sadolin & Holmblad A / S, Holmbladsgade 70, DK-2300 K / benhavn S,

Denmark-Danmark (DK) (72) Karl Frarxdsen, Kastrup, John Hansen, S ^ Borg, Denmark-Danmark (DK) (74) Oy Kolstnr Ab (5 * 0 Method for treating fresh or sawn wood and substances used in the process - Förfarande för behandling av nyfällt eller nysägat trä velt medel för användning vid förfarandet

The invention relates to a method for treating freshly felled or freshly sawn wood with a wood preservative.

It is known to treat the sawing surfaces and wounds of freshly felled trees and freshly sawn wood with alkaline aqueous solutions of chlorophenol salts such as sodium salts of tri-, tetra- and pentachlorophenol to prevent or control fungal damage to the wood during drying and / or storage.

However, such treatment is not satisfactory due to their toxicity to humans and thus the handling of such preservatives is dangerous. For example, in rats, the LD50 of sodium pentachlorophenolate is 270 mg / kg.

A further disadvantage of the latter compound is that it evaporates in considerable amounts during the drying step, where the temperature can be as high as 60 ° C.

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Danish Patent Nos. 117,115 and 119,326 describe a number of mideovicides and fungicides containing benzimidazoles as active ingredients. These preservatives are primarily intended for use in connection with live plants, but it is mentioned that they can also be used for the treatment of wood, fibreboard, paper and other industrial materials.

Said benzimidazoles have good fungicidal activity against Ascomycetes species and many Fungi imperfecti species. In contrast, a complex mixture of potency Phycomycets and Basidiomycetes and some Fungi imper-fecti species, these known substances are not suitable for treating freshly felled or newly sawn wood.

It is also known that orthosubstituted benzoic acid anilides are effective against Basidiomycetes species.

The object of the invention is to achieve effective and broad-spectrum protection of freshly felled or freshly sawn wood against fungal pests.

This object is achieved by the method of the invention, which is characterized in that the wood is treated as described in the characterizing part of claim 1.

By treating wood with said fungicidal mixture, a surprising potentiating effect is obtained, which is evident from the research results of Example 1 below.

The compounds defined in (b) and (c) are closely related to the compounds defined in (a) because, when used in an aqueous medium, they become the latter.

The wood preservative according to the invention is prepared primarily in the form of a concentrate which is diluted before the wood is treated. Preferably, an aqueous concentrate is used, which is diluted with water before use.

When formulating the wood preservative used in the process of the invention, the weight ratio of the Group A compound to the Group B compound is preferably about 1: 2.5.

The amounts of both compounds in the dilute solution are preferably 0.02-0.10%, in particular 0.05-0.25%.

The method of the invention is not only well suited for the treatment of freshly sawn wood such as boards, planks and the like, but also for the treatment of other forms of wood such as cut plywood.

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The invention further relates to a wood preservative for use in the method described above. This wood preservative is characterized in that it contains the active ingredients mentioned in claim 4.

In addition to effectively and broadly protecting this freshly cut or freshly sawn wood, this substance has the advantage of low toxicity, i.e. its LD50 in rats is greater than 1500 mg / kg.

The following examples illustrate the invention.

Example 1

A wood preservative having the following composition was prepared in the form of an aqueous suspension:

Parts by weight of methyl 1- (butylcarbamoyl) -2-benzimidazolecarbamate (A) 0.05 2-iodobenzoic acid anilide (B) 0.125 1- (3-chloroallyl) -3,5,7-1-azonia amantane chloride 0.01 alkylaryl polyether alcohol 0.01 hydroxyethylcellulose 0.06 water 99.75

The wood preservative described above was studied in the so-called using the filter paper method. In this case, the filter paper is dipped in the substance and smaller pieces are cut from the dried paper, which are placed in petri dishes containing malt extract as a medium.

A spore or mycelial suspension of the test fungi is then inoculated onto both the paper and the medium. Different amounts of group A and B compounds were used in the experiments.

The results obtained are shown in Table I below.

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Table I

Concentration Penicil- Fungal mixture ^ Pheniophora Muco- Blue fungus A (%) B (%) lium sp. gigantea rales (Pullularia (Basidiosp.) mycetes) 0 0.1 - - 0 0.125 - - (+) 0 0.3 - - + + (+) 0.01 0.025 + - + (+) 0.05 0.125 + + + + + 0,1 0,25 + + + + + 0,01 0 - - 0. 05 0 - - 0,1 0 - + + s adequate protection (+) i partial protection: insufficient protection 1) Mushroom mixture consisted of the following fungi: 1. Apergillus niger 2. Chaetomium globosum 3. Cladosporium Herbarum 4. Trichoderma viride 5. Trichoderma spec.

As can be seen from Table I above, the benzimidazole (A) used is not effective against said fungi when the compound is used alone and at a concentration of 0.01 to 0.1%. The exception is potency at a blue-mushroom concentration of 0.1%.

For the benzoic anilide (B) used, Table I shows that, when used alone, the compound is active against Pheniophora gigantea, Mucorales and bluetongue only at relatively high concentrations.

5 64761 The simultaneous use of the two compounds has a potentiating effect compared to the results given in Table I, in that the concentrations of compounds A and B at only 0.01 and 0.025% achieve the prescribed protection against three of the five types mentioned and adequate protection against all five types of fungi. against A and B at 0.05 and 0.125%, respectively.

Example 2

A wood preservative concentrate having the following composition was prepared: 2- (methoxycarbamoyl) benzimidazole (A) 1.0 g of 2-bromobenzoic anilide (B) 2.5 g of 1- (3-chloroallyl) -3,5,7-1-azonia amantane chloride 0.2 g alkylaryl polyether alcohol 0.2 g hydroxyethylcellulose 1.1 g water 95.0 g

The concentrate described above was diluted with water to various application concentrations. Fresh pine chips were inoculated with Penicillium sp isolated from contaminated pine. The results are shown in Table II.

Table II

Concentrate Concentration (%) Growth (%) application rate (%) A B Penicillium sp. Pullularia sp.

2 0.02 0.05 35 3 4 0.04 0.10 8 0 5 0.05 0.125 2 0

Δ 0.08 0.20 10 O

10 0.10 0.250 15 1 15 0.15 0.375 20 3 20 0.20 0.50 20 3 6 64761

Example 3

A wettable powder having the following composition was prepared:

Parts by weight of compound A 10.0 of compounds B 25.0 of sodium alkyl sulfonate 5.0 of dioctyl sodium sulfonate 2.0 of diatomaceous earth 58.0 (Compositions 1, 2 and 8 below also contain 25 parts by weight of diatomaceous earth).

All ingredients were mixed in a blender and then micronized in a hammer mill to a particle size of 10-20 microns.

An aqueous suspension containing 0.2-0.8% w / w in water was prepared for use.

Table III

„Products No

Compound A Compound B

1 dimethyl 4,4-o-phenylenebis- (3-thioallophanate) 2 diethyl-4,4-o-phenylene bis- (3-thioallophanate) 3 dimethyl-4,4-o-phenylenebis- 2-iodobenzoic anilide (3-thioallophanate) ) 4 Dimethyl-4,4-o-phenylenebis-2-bromobenzoic acid anhydride (3-thioallophanate) 5 Dimethyl-4,4-o-phenylene bis-2-methylbenzoic acid anilide (3-thioallophanate) 6 2- (methoxycarbamoyl) -2- iodobenzoic acid anilide benzimidazole 7 2- (methoxycarbamoyl) -2-methylbenzoic acid anbenzimidazole 7 64761 8 methyl 1- (butylcarbamoyl) -2-benzimidazolecarbamate 9 methyl 1- (butylcarbamoyl) 2-iodobenzimide butylcarbamoyl) -2-methylbenzoic acid anilide benzimidazole carbamate

The freshly sawn pine boards were treated by dipping completely in the suspension, after which they were oven-dried to a moisture content of about 18%. The boards were bundled together and placed in the sky for less than 12 months. The multifaceted destructive effect of the fungi was evaluated according to a scale of 0-4, where O means survival from the destructive effect and 4 means strong destructive effect. The results are reported as averages in bundles of about 120 boards.

Table IV

Product No. Power Effect X

1 2.01 2 2.16 3 0.69 4 0.75 5 0.79 6 0.61 7 0.83 8 1.76 9 0.50 10 0.62 raw 3.31 X: average

As the results show, the addition of group B compounds greatly improves the results.

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Example 4

A concentrate having the following composition was prepared:

Parts by weight of methyl 1- (butylcarbamoyl) -2-benzimidazolecarbamate (A) 0.05 2-iodobenzoic acid anilide (B) 0.125 1- (3-chloroallyl) -3,5,7,1-azonia-amantane chloride 0.01 alkylaryl polyether alcohol 0.01 hydroxyethylcellulose 0.06 water 99.75

The concentrate described above was diluted with water to various application concentrations.

Experiments were performed on fresh pieces of pine wood sawn from a thin trunk, 4-5 cm in diameter and about 8 mm thick. Wetted in the diluted product and sprayed with a fungal-spore suspension containing the following fungi:

Caldosporium spaerosperum Paecilomyces varioti Penicillium sp.

Aspergillus amstelojot

The drawn specimens were placed in glass containers for three weeks after which the intensity of growth was assessed. The results are shown in Table V.

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Table V

Concentrate (%) In the treatment fluid Growth (%) A (%) B (%) 0 0 0 54 1 0.01 0.025 31 2 0.02 0.05 20 3 0.03 0.075 18 4 0.04 0.10 16 5 0.05 0.15 17 6 0.06 0.15 18 8 0.08 0.20 24 10 0.10 0.250 36 15 0.15 0.375 52 20 0.20 0.50 30

Claims (5)

10 64761 A compound of formula I '> SS ^ CN-COOR ^ C = N-COOR - * / W ^ /'> / \ n / ^ X <2 Ϊ2 RR, in which R ^ is N 2 containing 1 to 4 carbon atoms » An alkyl group and R is a hydrogen atom or -CN-R in which R is an alkyl group having 1 to 2 carbon-H 0 atoms, a phenyl group optionally substituted by a methyl, ethyl, methoxy, ethoxy, nitro or cyano group, or a halogen atom, a benzyl group optionally substituted by a methyl, nitro or methoxy group or a halogen atom, a (cycloalkyl) alkyl group having 7 or 8 carbon atoms and an optional substituent being a methyl group, an alkenyl group having 3 to 10 carbon atoms or 3 to 6 carbon atoms or (b) a compound of formula SOMM 4 NH-ONH-C-OR and N> · / / JJH-C-NH-C-OR II II, i.e. 11 64761 4, wherein R is a methyl or ethyl group, or c) of the formula NH-C'C-O-R v- Γ j! A salt of phenylene bistioureide in the formula wherein R 1 and R 2 are an alkyl or alkenyl group having 1 to 6 carbon atoms, X is a chlorine atom, a nitro or a methyl group, n is O or 1 and M is a calcium, barium or copper atom, and B. a compound of formula R7 CO-™ - (^) 7 in which R is a halogen atom, a methyl, amino or nitro group. A method for treating freshly felled or freshly sawn wood with a wood preservative, characterized in that a wood preservative is used which contains a mixture of A as active ingredient. (a) formula H Process according to Claim 1, characterized in that the weight ratio of the use of the compounds of groups A and B is about 1: 2.5. 12 64761 Process according to Claim 1, characterized in that the amount of the group A compound is 0.02 to 0.10% and the amount of the group B compound is 0.05 to 0.25% of the wood preservative. Wood preservative for use in the process according to Claim 1, characterized in that it contains, as active ingredient, a mixture of a compound of the formula Aa HC = N-COOR> CN-COOR 2 · R R 2, in which R 1 is 2 ¥ 3 3 alkyl group and R is a hydrogen atom or -CNR in which R is an alkyl group containing 1 to 12 carbon atoms, a phenyl group optionally substituted by a methyl, ethyl, methoxy, ethoxy, nitro or cyano group, or a halogen atom, a benzyl group optionally substituted by a methyl, nitro or methoxy group or a halogen atom, a (cycloalkyl) alkyl group having 7 or 8 carbon atoms and an optional substituent being a methyl group, an alkenyl group having 3 to 10 carbon atoms or 3 to 6 carbon atoms a (alkoxycarbonyl) alkyl group, or b) the formula SO .. NH-C-NH-C-OR4 cc. NH-C-NH-C-OR IV VI No. 4 64761, wherein R is a methyl or ethyl group, or c) 5 NH-C CO-R3 -, syl - x 1 n U Ί s \ i H salt of the formula wherein R 1 and R 2 are an alkyl or alkenyl group having 1 to 6 carbon atoms, X is a chlorine atom, nitro - or a methyl group, n is O or 1 and M is a calcium, barium or copper atom, and B. a compound of formula R7 CO-NH- ^ 7 in which R is a halogen atom, a methyl, amino or nitro group. 14 Patent screw: 6 4 V 6 1