FI60155B - SKYDDSMEDEL FOER TRAE OCH ANDRA FIBERMATERIAL - Google Patents

Description

GSpl [B] (11) ANNOUNCED $ 6 PUBLICATION 6Q155

Ma l J '' UTLÄCGNINGSSKRIFT χ (45) u t e- n t f; r> elät ^ V '(51) K ».lk.3 / lnt.a.3 B 27 K 3/52 FINLAND — FINLAND (M) P * ttfittlh * k« mut— P «t« nuna5knta | 752676 (22) HtkamlipUrl - Anaeknlngadag 2U.09.75 '' (23) Alkupllv · —Gllti (h «tadtg 2 ^ .09.75 (41) Tullut JulkMcil - BIlvH offmtllg 25.03.77

National Board of Patents and Registration · .... ........

-. . . , ^, (44) NlhttvUalptnofl a moon Release date. -

Patent- och regiaterstyrelsen '' Ankuja utlagd och mUkrttun puMkarad 31.08.8l (32) (33) (31) Pyy ^ «« y atuolkaua — B «glrd prloritat (71) Hager Aktiebolag, Kryssarvägen 17» S-183 52 Täby, Sweden The present invention relates to a preservative for wood and other fibrous materials. This invention relates to a preservative for wood and other fibrous materials. This invention relates to a preservative for wood and other fibrous materials. organic fiber products against decomposing organisms, in particular to protect wood from bluing, containing a) normal fatty acids with 6 to 11 carbon atoms, b) alkali in the form of ammonia, sodium and / or potassium compounds, and c) a weak acid such as carbonic acid which stabilizes the aqueous solution .

As is apparent from Swedish patent 37 * + 686 and Finnish patent application 3 ^ 05/71, certain fatty acids are effective in destroying wood rot fungi. The degree of protective effect of these acids of interest in this regard follows a certain formula. It is true that, starting with acetic acid containing two carbon atoms, the potency of the acids increases with the increase in the number of carbon atoms and gradually rises quite high. This continues up to a fatty acid containing 11 carbon atoms. At that point, the formula breaks. A fatty acid containing 12 carbon atoms has a lower protective effect than the above acid. Acids containing 13 or more carbon atoms appear to be devoid of protective effect. Acids with a higher number of carbon atoms are becoming increasingly insoluble, perhaps the lack of potency of fats with more than 12 carbon at 2,601,55 atoms is related to the fact that they are too sparingly soluble.

For the sake of clarity, it should be emphasized that this applies to normal fatty acids. Those having 2 to 11 carbon atoms in the molecule are called acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, heptanoic acid, caprylic acid, pelargonic acid, capric acid and undecelylic acid.

Efficient acids are available at relatively low prices, this being true for acids containing at least an even number of carbon atoms, e.g. caproic, caprylic and capric acids, i.e. acids having 6-8-10 carbon atoms. Caps have been used to store timber in conjunction with copper in accordance with the above patent.

Since in this case the primary issue is to protect the wood from blueing, metal components must be avoided, as they usually do not have any real benefit. Their power in the event is not particularly high and the attachment they provide is not necessary in this context. It raises the price of the material and in some cases they cause direct disadvantages such as discoloration of the timber, wear of tools when the timber is later processed.

The said acids are well suited for protection against bluing. The acids can be dissolved in organic solvents and placed on the wood as solutions thus obtained. After treatment, the solvent evaporates, leaving the protective acid in the wood. In use, these solvents are not very suitable. They are expensive and besides, there is a risk of fire. It is more practical to use acids diluted with water as an emulsion or solution.

There are certain difficulties in making emulsions, they are usually not very durable and do not lead to the path that is being sought in the first place. It is best to use aqueous solutions. Essentially, there is then a way to dissolve the acids with the base. However, this can hardly be done due to the formation of disturbing soap.

It has been found that suitable substances are obtained when there is a stoichiometric excess of alkali compound b) relative to the fatty acid to make it readily soluble in water, and that the substance additionally contains d) boric and / or hydrofluoric acid as a known complementary but synergistically active protective agent, in particular boric acid, may replace, in whole or in part, a weak stabilizing acid.

This additional acid may be present in the basic compounds with which the fatty acids are reacted. The substances prepared in this way give good aqueous solutions. If the substance contains larger amounts of multimolecular acids then some opalescence of the solution may occur.

The substance can be used in cases other than bluing protection.

In general, it can be used to protect wood and other fibrous products such as paper, board, leather, etc. in cases where a colorless substance is required and where the treated product is not exposed to too strong a solution.

The substance described here provides very good protection against bluing and, of course, against decay.

The third interfering microorganism is molds. In most cases, protection against these is not required because the products to be protected do not usually occur where there are conditions for the development of mold. However, mold is present under certain special storage conditions. Organic acids have a protective effect on mold but they are not actual anti-mold agents.

In the latter cases, it may be appropriate to mix with the substance something which has such a special effect. Such substances include formaldehyde, sorbic acid, benzoic acid and salicylic acid. Propionic and acetic acids also have a certain special effect. Of the known anti-mold agents, certain organotin compounds can also be listed, but given their manufacturing cost, they are not very interesting in the present case.

“60155 Substances of this kind - mentioned by way of example above - may, if desired, be mixed with a preservative. In order to obtain a full effect, the above mold preservatives must be used in certain concentrations. In the above case, this concentration can be substantially reduced because the main components - organic acids are also effective against mold, in addition there is a synergistic effect, i.e. two different preservatives work better than the sum of the effects of the individual substances.

The concentration of the anti-mold agent added to the preservative can therefore generally be limited to at most half of the main component - the organic acid. The mixing of special anti-mold agents usually takes place very easily after they have been neutralized with ammonia.

In cases where formaldehyde is used, this can be added as solid paraformaldehyde.

Examples of the substances according to the invention are the mixtures below. The preparation takes place at normal temperature, with the exception of substances 4 and 10, which must be heated to 60 degrees. The addition of ammonium bicarbonate must generally take place at the final stage.

To avoid its decomposition, it cannot be mixed with pure acids or strong bases.

Substance 1 30 parts by weight of caprylic acid 120 ”of soda, crystalline 2 30 M of caprylic acid 18" of concentrated ammonia 60 "of ammonium bicarbonate 3 30" of caprylic acid 15 "of sorbic acid 25" of concentrated ammonia 60 "of ammonium bicarbonate 4 30" of caprylic acid 90 "of soda, "caprylic acid 30" conc. ammonia 60 "boric acid 5 60155

Substance 6 30 parts by weight of caprylic acid 30 "of concentrated ammonia 60" of ammonium fluoride 7 30 "of caprylic acid 24" of sodium bicarbonate, monohydrate 60 "of ammonium fluoride 8 30 u of caprylic acid 12" of propionic acid 30 "of concentrated ammonia 60" of ammonium bicarbonate 30 "of ammonium bicarbonate 9 "soda ash, monohydrate 60" ammonium bicarbonate 10 30 "fatty acid mixture, technical caproic acid 1% heptanoic acid 27 caprylic acid 45 pelargonic acid 25 capric acid 2 90" soda, anhydrous 11 30 "fatty acid mixture 18" conc. ammonia 60 "ammonium bicarbonate 12 30" fatty acid mixture 30 M conc. ammonia 60 "boric acid 13 30" fatty acid mixture 30, f conc. ammonia 60 "ammonium fluoride 14 30" fatty acid mixture 24 "soda, monohydrate 60" ammonium fluoride 15 30 "fatty acid mixture 12" propionic acid 30 "conc. ammonia 60 "ammonium bicarbonate 16 30" fatty acid mixture 12 "propionic acid 30" soda ash, monohydrate 60 "ammonium bicarbonate 6 601 55

Effective protection against bluing is achieved if the wood is treated with aqueous solutions of these substances, either by spraying or dipping. Depending on the conditions for spreading the bluish surface, solutions of different strengths may be used. Generally, good protection is obtained with a 6 pound solution.

Claims (2)

7 60155 1. A water-based solution for an organic fiber product which does not contain organic substances, in particular a mixture of organic compounds having 6 to 11 carbon atoms, and (b) a mixture of ammonia, sodium and potassium-forming substances, and (c) en (b) for the purpose of reducing the amount of water used in the case of water or water, in the case of water or gas used in the form of water, and for the complete set, a synergistic network of shielding agents, color syrup d), a special borsyra helt ellel delvis kan ersätta den svaga, stabilization of syran c). 1. A water-soluble preservative for organic fiber products against decomposing organisms, in particular for protecting wood against fouling, comprising a) normal fatty acids having 6 to 11 carbon atoms, b) alkali in the form of ammonia, sodium and / or potassium compounds, and c) a weak acid, such as carbonic acid, which has a stabilizing effect on the aqueous solution of the substance, characterized in that the alkali compound b) has a stoichiometric excess over the fatty acid to make it readily soluble in water, and that the substance further contains d) boric and / or hydrofluoric acid as a complementary but synergistic as a substance, in which case acids d), in particular boric acid, can completely or partially replace the weak stabilizing acid c). Preservative according to Claim 1, characterized in that it contains a fatty acid having 6, 8 and / or 10 carbon atoms, preferably 8 carbon atoms. 2. The reaction medium according to claim 1 is selected from the group consisting of 6, 8 and / or 10 cholaters, for example 8 cholaters.