SE176998C1

SE176998C1 -

Info

Publication number: SE176998C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: R Winbladh Vid impregnering av tra till skydd mot skadegorare, sasom mikroorganismer °eh insekter, har man ,ofta anvant sig av i vatten ionsliga impregneringsmedel, vilka losts i med vatten ieke blandbara valskor, exempelvis oljor Fran petroleumdestillation eller lysgastillverkning. Inventor: R Winbladh When impregnating wood for protection against pests, such as microorganisms or insects, water-repellent impregnating agents have often been used, which are dissolved in water-immiscible rollers, for example oils from petroleum distillation or nitrous oxide production.

En dylik impregneringsvatska kan anvandas pa torrt eller f8ga fuktigt tra, men daremot icke pa travirke med hog vattenhalt, enar impregneringsvAtskan da icke overhuvudtaget tranger in i tract. Man liar visserligen forsokt ati genom tillsats av ett ytspanningsnedsattande medel till dylika impregneringsvatskor pa oljebasis fa. Ifuktigt tra att upptaga impregneringsvalskan, men man har p. detta satt endast lyekats fa ett tunt ytskikt impregnerat. Man har aven anyant emulsioner, vilka innehalla ett impregneringsmedel, och pA sa satt astadkommit en viss, ehuru ej fullgod skyddsverkan. Vid impregnering av fuktigt Ira liar man dadar tidigare vanligen anvant vattenlosliga irnpregneringsrnedel, vilka Mats 1 vatten. Nackdelen med dylika vattenl5sliga impregneringsmedel .ar att de efter impregneringen Ater kunna utlakas ur traet medelst vatten, t. ,ex. vid regn, flottning eller dylikt. Such an impregnation liquid can be used on dry or moist wood, but not on wood with a high water content, otherwise the impregnation liquid does not penetrate into the tract at all. It is true that attempts have been made to add such an oil-based impregnating water shoes by adding a surface-tensioning agent. It is difficult to absorb the impregnation roller, but in this way only a thin surface layer has been impregnated. Emulsions are also present, which contain an impregnating agent, and in this way a certain, although insufficient protective effect is achieved. When impregnating moist irradiation, water-soluble impregnating agents have been commonly used in the past, which Mats 1 water. The disadvantage of such water-soluble impregnating agents is that after the impregnation they can again be leached out of the wood by means of water, e.g. in case of rain, floating or the like.

Det ar aven kant att man har anvant impregneringslosningar som besta av ett i vat-ten ,olosligt impregneringsmedel som losts i ett med vatten blandbart losningsmedel, exempelvis metylalkohol, etylalkohol och aceton. It is also possible to use impregnation solutions consisting of an aqueous, insoluble impregnant dissolved in a water-miscible solvent, for example methyl alcohol, ethyl alcohol and acetone.

I jamforelse med de .ovan nananda impregneringslosningarna inncbar den senate losningen ett avgjort framsteg vid impregnering av fuktigt tra, i det att det med vatten blandbara losningsmedlet loser .sig i det 4 tract befintliga vattnet, ()eh darigenom astadkommer att impregneringsmedlet transporteras in i traet till ett betydande djup, och direfter joke kan Ater utlakas. In comparison with the above-mentioned impregnating solutions, the senate solution represents a definite advance in the impregnation of moist wood, in that the water-miscible solvent dissolves in the water present in the tract, () thereby ensuring that the impregnating agent is transported into the wood. to a significant depth, and direfter joke, Ater can be leached.

Det har nu befunnits sit man genom ett lampligt val av losningsmedel kan komma fram till en impregneringsvatska med egenskaper som aro overlagsna de tidigare ,an.tyd da vatskorna som innehalla metylalkohol, etylalkohol eller aceton. Enligt uppfinningen impregnerar man fuktigt tra mot skadegorare genom att behandla det fuktiga tract med en losning av ett i vatten .olosligt impregneringsmedel i diacetonalkohol. It has now been found that a suitable choice of solvent can arrive at an impregnation liquid with properties which are superior to the previous ones, as indicated by the liquids which contain methyl alcohol, ethyl alcohol or acetone. According to the invention, moist pulp is impregnated against pests by treating the moist tract with a solution of a water-insoluble impregnating agent in diacetone alcohol.

,Genom anvandningen av diacetonalkohol som losningsmedel uppnar man en del viktiga :fardelar vid konserveringen, ,som joke uppnas med de tidigare kanda vattenlosliga losningsmedlen. DA impregnerdngsvatskan enligt uppfinningen suges iii i det ,fuktiga tra, som :skall behandlas, kornmer losningsmedlet att spadas ut av det vatten, som befinner sig i tract. Vid en tillracklig utspadning kommer det vattenolasliga konserveringsmedlet att fail-la nt. Vid dc vanligen anvanda konserveringsmedlen, I. ,ex. pentaklorfenol, kommer konserveringsmedlet att falla ut frail diacetonalkoholen i en sarskilt verksarn form, namligen med en oljelik konsistens. Delta innebar .att tracts fibrer komma att bli oingivna av en. oljig hinna, som ger ,ett utomordentligt gott skydd mot skadegorare. Through the use of diacetone alcohol as a solvent, some important things are achieved: dangerous parts in the preservation, as a joke is obtained with the previously known water-soluble solvents. The impregnating water liquid according to the invention is sucked into the moist wood which is to be treated, causing the solvent to be spilled out of the water present in the tract. If sufficiently diluted, the water-soluble preservative will fail. In dc usually using the preservatives, I., ex. pentachlorophenol, the preservative will precipitate from the diacetone alcohol in a special active form, namely with an oily consistency. Delta meant that tracts fibers would be unspecified by one. oily skin, which provides, exceptionally good protection against pests.

Diacelonalkoholen har en mycket hog kokpunkt i jamforelse med de kanda losningsmedlen, och likasa dr ,dess angtryek vid ° forhallandevis myeket Mgt, namligen 0,8 mm Hg. Som jamforelse skall namnas att Angtryeket vid 20° far aceton ar 184 mm Hg. Detta innebar att losningsmedlet avdunstar langsamt fran tries inre, oeh kommer att kvarstanna i tract praktiskt taget under hela den tid, som kan vara aktuell for en konservering. Trafibrerna komma darfor att vara omgivna av en ifilm av losningsmedlet innehallande lost konserveringsmedel (givetvis med undantag for ovan namnda fall att utspadningen med vatten liar gall sâ langt att en .oljig hinna bildas omkring fibrerna). Vare sig det ena eller det andra forloppet intrdffar, erhaller man dock en god konservering. The diacelon alcohol has a very high boiling point in comparison with the known solvents, and likewise, its angtryek at ° relatively much Mgt, namely 0.8 mm Hg. As a comparison, it should be mentioned that Angtryeket at 20 ° gets acetone is 184 mm Hg. This meant that the solvent evaporates slowly from the inside of the try, and will remain in the tract for virtually the entire time that may be required for preservation. The traffic fibers will therefore be surrounded by a film of the release agent containing loose preservative (of course, with the exception of the above-mentioned case that the dilution with water bile so far that an oily film is formed around the fibers). Whether one or the other process occurs, however, a good preservation is obtained.

Ditacetonalkoholens raga angtryck och ringa avdunstningshastighet malt& ytterligare en vardefull fordel. Vid konservering av fuktigt travirke genom en enkel neddoppning av vir- 2— — ket i- en impregneringsvatska eller pastrykning av vatskan ph virket med en pensel uppliar man att impregneringsvatskan intranger ett kort stycke i traet, medan de inre partierna av traet forbli opaverkade. SA. lange detta impregnerade ytskikt far forbli intakt, ger .det hela trastycket att gott skydd. Annorlunda blir fOrhallandet ,om detta ytskikt skadas, t. ex. am man sagar virket. Darvid blottI5.ggas obehandlade traytor genom vilka mikroorganismer kunna intranga i traet.- Impregneringsvatskan enligt uppfinningen medfor nu den goda effekten att den »kryper» at Over dylika nysagade ytor, sa .att dessa en. kort tid after sagningen aven ha blivit konserverade. Ett enligt uppfinningen beh-andlat virkesstycke ar darfor .ur konserveringssynpunkt »sjalvlakande> pa sh salt att signing av virket eller skador i ytskiktet icke nodvandiggora en ny konsemeringsbehandling. Ditacetone alcohol's raging vapor pressure and low evaporation rate malt & another valuable benefit. When preserving moist wood by simply dipping the wood in an impregnating water or pasting the water on the wood with a brush, it is learned that the impregnating water penetrates a short distance into the wood, while the inner parts of the wood remain unaffected. SA. lange this impregnated surface layer may remain intact, gives .the whole piece of wood that good protection. The condition will be different if this surface layer is damaged, e.g. am man sagar worked. In this case, only untreated trays of gases through which microorganisms can penetrate the trace. The impregnation liquid according to the invention now has the good effect that it "creeps" over such freshly sawn surfaces, so that these one. shortly after sawing have also been preserved. A piece of wood treated according to the invention is therefore, from the point of view of preservation, "self-leveling" on the salt that sealing of the wood or damage to the surface layer does not necessitate a new preservation treatment.

Problemet att impregnera ,fuktigt tra ar aktuelIt -exempelvis vid fanning av aspar for tandstickstillverkning. Snittytan pa de nykapade aspstoekarna erbjuda -ett gott fotfaste f Or diverse mikroorganismer, vilka snabbt sprida sig in i tract. Medelst impregnering av snittytorna kan man visserligen fiirhindra att skadegtirare kunna tranga in i tract, men denna . impregnering maste ske praktiskt taget omedelbart eller sagningen. Snittytan fir darvid sa. fuktig att de namnda impregneringsvatskorna pa oljebasis icke kunna anvandas, och vattenlosliga impregneringsmedel ha som namnts den nackdelen att de Ater kunna utlakas 1. ex. av regn eller vid flottning, innan stoekarna skola anvandas. Om man uppskjuter impregneringen tills stocken har lorkat mycket att oljehaltiga impregneringsvatskor kunna anvandas, ha skadegorare redan hunnit tranga langt in i trfiet, vilket leder till avsevarda virkesforluster. The problem of impregnation, moisture, is relevant - for example, when making aspers for toothpick manufacturing. The cut surface of the newly cut aspen stems offer a good foothold for various microorganisms, which spread quickly into the tract. By means of impregnation of the cut surfaces, it is admittedly possible to prevent pests from penetrating into the tract, but this. impregnation must be done practically immediately or sawing. Snittytan fir darvid sa. moist that the said oil-based impregnation liquids cannot be used, and water-soluble impregnating agents have, as mentioned, the disadvantage that they can be leached out again. of rain or floating, before the stokes are to be used. If you postpone the impregnation until the log has done a lot to ensure that oily impregnation water can be used, pests have already penetrated far into the wood, which leads to significant wood losses.

Medelst sattet enligt uppfinningen kunna stoekarnas snittytor impregneras redan ph ar- betsplatsen, omedelhart efter kapningen, och impregneringsmedlet kan Ater icke utlakas under stockarnas transport till fabriken -och den darpa faljande lagringen. By means of the method according to the invention, the cut surfaces of the stoves can already be impregnated at the workplace, immediately after cutting, and the impregnating agent can not be leached out during the transport of the logs to the factory - and the droplet falling.

I .det fall aft traden fAUna vid en temperatur under 00 C kan impregneringen enligt uppfinningen uppskjutas tills stockarna sammanforts till storre upplag, I. ,ex. lastats pa vagnar. In the case of the wire fAUna at a temperature below 0 ° C, the impregnation according to the invention can be postponed until the logs are brought together into larger warehouses, I., ex. loaded on wagons.

Som impregneringsmedel kan enligt uppfinningen principielll vane vattenolosligt Amne ,anvandas, som ger skydd mot skadegorare, sasom mikraorganismer ,och insekter, och som fir losligt i nagot med vatten blandbart losningsmedel. Har skall speciellt namnas klorerade organiska foreningar, skarn monoklornaftalin, ,ortodiklorbensol, samt pentaktorfenol ,och derivat darav, och vidare naftenater, fenoler, m. fl. According to the invention, water-insoluble Amne can in principle be used as impregnating agent, which provides protection against pests, such as microorganisms, and insects, and which dissolves soluble in any water-miscible solvent. Special mention should be made of chlorinated organic compounds, monochloronaphthalene, orthodichlorobenzene, and pentactorphenol, and derivatives thereof, and further naphthenates, phenols, etc.

Exempel 1. 50-200 g pentaklorfenol lostes i 1 liter diacetonalkohol. Med en pensel striiks denna impregneringsvatska pa de farska snittytorna av sa.gade aspstockar. Example 1. 50-200 g of pentachlorophenol were dissolved in 1 liter of diacetone alcohol. With a brush, apply this impregnation liquid to the fresh cut surfaces of so-called aspen sticks.

Exempel 2. Example 2.

I en losning av diacetonalkohol innehallande 5 viktsprocent ortodiklorbensol neddoppades en fuktig furuplanka under en lid av fern minuter, varefter den lick torka. In a solution of diacetone alcohol containing 5% by weight of orthodichlorobenzene, a moist pine plank was immersed for a period of four minutes, after which it was allowed to dry.

Claims

Patent claim:

Salt to impregnate damp wood against pests, characterized by treating the damp wood with a solution of a water-insoluble impregnating agent in diacetone alcohol.

Set according to claim 1, wherein the impregnating agent consists of pentachlorophenol.

Salt according to claim 1, characterized in that the impregnation liquid is applied to the freshly sawn cut surface of fresh wood substantially immediately after sawing.

4. Set according to patent claim 3 when sawing asptra for toothpick manufacturing.

5. Set according to patent claim 1, characterized in that the impregnation liquid is brushed or sprayed on the surface of the (slightly damp) tract.

Set according to claim 1, characterized in that the -mud trait is immersed in the impregnation liquid.

7. Trac preservatives, can be drawn dam-sr, aft it consists of a solution of a water-insoluble impregnating agent in diacetone alcohol. Request publications: Patent documents from Sweden 140 639; U. S. A. 1 983 248, 2 209 970. Other publications: Farbe und Lack. 56 (1950), pp. 289 and 291. Chemistry in Canada. 1949: Sept., pp. 30-33. Chapman Chemical Company. Technical newsletter No. 2, 1 Nov. 1951. (The pressure treatment of wood with penta-petroleum solutions). Stockholm 1961. Kungl. Boktr. P. A. Norstedt & & incr. 610089