DE1642182A1 - Process for the protection of wood and other combustible materials against fire and putrefaction - Google Patents

Description

DR. BERG DIPL.-rNG. STAPF

PATENT LAWYERS
8MUNCHENeO ₁ MAUERKIRCHERSTR ₁ AS

Dr. Berg Dipl.-Ing. Stapf, 8 MOnchen 80, Mouerkircherstraße 45

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Lawyer Files-Mr. 16 725

P 16 42 182.2-45 '7 // V /

GH) WHT IHSiDYiEUiD GORNICO) WA, Katowice / Po 1 en

"Procedure for the protection of wood and other combustible Substances against inflammation and rot. "

The invention is a method for the protection of Wood and other combustible materials against ignition and Putrefaction by soaking with a protective agent based on salts from chloroligninosulfonic acids and urotropin.

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Processes are known for protecting wood and other combustible substances by using chlorinated and neutralized sulphite waste liquors which contain salts of Cblorligninosulphonic acids. However, in practice it has show that these salts have a number of Mangln which their use as a means of protection against Aggravate inflammation and rot. Among other things, causes the application of aqueous solutions of salts of chloroligninosulfonic acids high corrosion of steels Impregnation systems, instability, regarding the pH value and weak penetration into the wood during the impregnation process. You can see the corrosive properties of the salts of chloroligninosulfonic acids by introduction in the solution of small amounts of urotropine, however, this method has no practical significance because after a few days the inhibiting effect of urotropin disappears. Wood and other combustible materials, which have been impregnated with salts of chloroligninosulfonic acids, lose their properties achieved in this way Consequences of water leaching, which limits their use to areas that are no longer exposed to exposure are exposed to constant rainfall. So far no effective species are known which would cut these salts out of the wood before leaching. It was true tried to leach through applied layers of paint

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to prevent, but this procedure has proven to be too costly and is therefore for general use, for example in construction, unsuitable. In addition, the majority of paints and varnishes also contain flammable or highly flammable components. There are also no known agents that leach the traditional fire retardants such as chlorammonium, ammonium phosphates, borax and the like prevent the wood.

The object of the present invention is now to an effective method of protection using the deficiencies noted above, particularly corrosion of wood and other combustible materials to prevent inflammation and rot while avoiding leaching the protective means even in those cases where the protected material, such as in construction the long-lasting Exposure to water.

It has now been found that there is an effective protection of wood and other combustible materials against ignition and achieved against putrefaction if a protective agent is used for the impregnation, which is 10 to 40 percent by weight Salt of chloroligninosulfonic acids, 0.1 to 2 wt. # Urotropin and as a modifier 0.1 to 2 wt. # Condensation

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products of the fatty acid chain or sulfo fatty acid chain with Aminocarboxylic acids, most advantageously with hydrolysates which contains proteins. Aminocarboxylic acids, aminosulfonic acids or condensation products of the fatty acid chain or sulfo fatty acid chain can also be used as modifiers Sulfoamino acids are used. Protection against Leaching of the impregnating agent from the already impregnated wood is achieved by putting the protective agent together with methylolurea, with ethyl ethers or ethyl ethers of methylolurea, with methyl ethers or ethyl ethers of ethylmethylοlamine separately or in all possible ways quantitative combinations in the form of a 5 to 70 # water solution is used, but by introduction the latter in contact with the surface of the protected wood only after the end of the impregnation.

Aqueous solutions of methylolureas, of methyl ethers or ethylmethylolureas or ethyl ethers or methyl ethers of methylοlamine form during the Reaction with chlorolignin sulfones in the wood creates a hydrophobic intermediate layer and therefore protects completely and permanently against leaching of the impregnating agent from wood and other combustible materials.

It has surprisingly been shown that duroh a

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! Impregnation or moistening of the wood or other combustible substances with aqueous solutions of methylolureas with Me thy la them or Ät hy la them from methylolamine the protective properties against inflammation and the impregnated fabrics are reinforced.

According to the method according to the invention for protecting wood and other combustible substances against ignition and putrefaction applied protective agent has a stable "pH value, eliminates corrosion and has favorable technical properties Properties such as good penetration into wood. Wood and other combustible materials, which have been treated according to the invention still retain their mechanical properties.

example 1

1000 kg of a 30 #igen solution of Chlorosulfonoligninsäuren is 6 kg Urotropin with 6 kg of a 20 #igen aqueous solution of a condensate of oleyl chloride of the formula C ^ H _{7 5,} 0001 with aminocarboxylic acids, welohe were obtained by hydrolysis of proteins, the formula:

where η * 3 - 5 »mixed ·

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They thus prepared composition is diluted with water in the ratio 2: 1 diluted and it is impregnated under pressure of 8 atmospheres and at a temperature of 80 ⁰ C 10 cbm timber therewith. The wood treated in this way is completely protected against fire and rot.

Example 2

1000 kg of a 30 # solution salt of chloroligninosulphonic acids is obtained with 6 kg of urotropine and 6 kg of a 20% aqueous solution of a condensate of alkylsulphonic acid chloride of the formula RSO ₂ Cl with aminocarboxylic acids, obtained by hydrolysis of proteins, the general composition:

RSOgNHR / COHHR / n COOKa with η = 3 - 5 and

R = 10 - 18 mixed.

The product made in this way is diluted and then used for impregnating wood as in Example 1.

Example 3

1000 kg of a 30-year solution of chloroligninosulfonic acids are mixed with 6 kg of urotropin and 6 kg of a 20% aqueous solution of a condensate of alkyl sulfochloride of the formula RSO ₂ Cl with methylglyain, with the composition:

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RSO ₂ Ch ₃ HCH ₂ COOH
where R = 10-18C, mixed.

The so prepared means is diluted and then is impregnated with it according to Example 1.

Example 4

The protected wood obtained against fire and rot according to Examples 1, 2 and 3 is secured against leaching of the protective agent introduced by the action of water and moisture. First the wood is dried until its moisture content is not higher than 15 % and then becomes it is moistened two or three times or soaked for 5 to minutes with a 15% methylolurea solution containing 1% ammonium chloride. After moistening, the wood is stored air-dry for 2-5 days. The wood which has been secured in this way is given a monthly Leaching test, which consisted of weekly, cyclically repeated samples of 5 days each of intensive rinsing and subsequent two-day drying. It shows a stronger, burning effect than that wood which was not secured against leaching by methylolurea and not the leaching test had been subjected to water. The ammonium chloride we d to accelerate the hardening of the methylol

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urea residues, which had not reacted with the salts of the chloroligninosulfonic acids, were added.

Example 5

The procedure is as in Example 4, except that for moistening a 25 $ aqueous solution of methyl ether from methylolurea is applied.

Example 6

The procedure is as in Example 4, except that a 20 μl solution of methylolamine is used for moistening will.

Example 7

The procedure is as in Example 4, except that a 20% solution containing methylolurea and methylol in a ratio of 3: 1 is used for moistening.

Patent claims:

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Claims (5)

- 9 patent claims: 1. Procedure for the protection of wood and other combustible Substances against inflammation and rot by soaking with a protective agent based on salts of chloroligninosulphonic acids and urotropine, characterized in that a protective agent with a content is used for pawing from 10 to 40 percent by weight salt of chloroligninosulfonic acids, 0.1 to 2 percent by weight urotropin and as a modifying agent Substance 0.1 to 2 percent by weight of condensation products of a fatty acid chain or sulfofatty acid chain with aminocarboxylic acids, preferably with hydrolysates of proteins. 2. The method according to claim 1, characterized in that the protective agent is used together with methylolurea, with ethyl ethers or ethyl ethers of methylol ureas, with ethyl ethers or ethyl ethers of methyl ο! Melamine alone or in all possible combinations and quantitative ratios in the form of a 5 to 70 #igen aqueous solution is applied, the latter being introduced only after the end of the impregnation by contact with the surface of the impregnated wood. 3. The method: according to claim 1, characterized in that aminocarboxylic acids are used as the aldiflating substance. 109831/0427 N.-iU document!) (Art .; 8 l AU ;. 2 No. 1 sentence 3 d = r. Anciarungsaes. V. 4.9. WTJ O - - ίο - 4. The method according to claim 1, characterized in that that as a modifying substance amino sulfonic acids can be applied. 5. Terfahren according to claim 1, characterized in that condensation products as the modifying substance a fatty acid chain or a sulfo fatty acid chain with sulfo-amino acids can be used. 109831/0427