US655459A - Process of impregnating wood. - Google Patents

Process of impregnating wood. Download PDF

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Publication number
US655459A
US655459A US71998199A US1899719981A US655459A US 655459 A US655459 A US 655459A US 71998199 A US71998199 A US 71998199A US 1899719981 A US1899719981 A US 1899719981A US 655459 A US655459 A US 655459A
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United States
Prior art keywords
wood
oil
tar
impregnating
emulsion
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Expired - Lifetime
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US71998199A
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Julius Schenkel
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/02—Processes; Apparatus
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation

Definitions

  • This invention relates to a process for impregnating wood which causes the speciallyprepared antiseptic fluid to permeate the wood more thoroughly and more quickly under even considerably less pressure than is the case by known processes, while much less of the impregnating fluid is required.
  • Tar-oil or similar substances which are used for impregnating is transformed into a condition of finest division by suspending it in a solution of soap in water.
  • an emulsion is produced the degree of fluidity of which and the percentage of tar-oil contained therein can be changed as required, according to the proportions used. Therefore the power of the impregnating emulsion to permeate the wood and its consequent effect on the latter can be regulated according to the density and degree of dryness of the wood and purpose for which it is used.
  • Tar-oil solublein water can be prepared in different ways.
  • One suitable way of doing it' consists in the use of one hundred parts of rosin, which is saponified by means of a suit able amount of sodium hydroxide and diluted with water, so that the final result is an aqueous soap solution of about one thousand parts in weight. In this soap solution there are stirred at a moderate temperature about one thousand parts, in weight, of heavy tar-oil, so that the result is a thick but nearly clear solution.
  • this solution is poured in a thin stream in one thousand parts,in weight, of warm water, there will be produced a milky emulsion of tar-oil in which the oil is finely distributed to such a degree that the same will not be separated from the water by filtering through filtering-paper.
  • This emulsion is pressed into the sleepers in autoclaves after the wood has been suitably steamed and evacuated.
  • WVhat I claim, and desire to secure by Letters Patent is i
  • the process for the preservation of wood which consists in forcing into the Wood under pressure, a preservative substance consisting of a watery emulsion composed of tar-oil, wa ter and soap, the water and soap serving as a means of dissolving and emulsifying the tar-oil, and as a vehicle for conveying and distributing the same through the pores of the wood.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Description

UNITED STATES PATENT OFFICE.
JULIUS SCHENKEL, OF DORTMUND, GERMANY.
PROCESS OF IMPREGNATING WOOD.
SPECIFICATION forming part of Letters Patent No. 655,459, dated August 7, 1900. Application filed June 9,1899. Serial No. 719,981. (No specimens.)
To all whom, it may concern:
Be it known that I, JULIUS SonEnKnL, chemist,asubject of the Emperor of Germany, residing at Hohenzollernstrasse 9, Dortmund, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Processes of Impregnating IVood, of which the following is a full, clear, and exact description.
This invention relates to a process for impregnating wood which causes the speciallyprepared antiseptic fluid to permeate the wood more thoroughly and more quickly under even considerably less pressure than is the case by known processes, while much less of the impregnating fluid is required. These results are as follows:
Tar-oil or similar substances which are used for impregnating, either unmixed or mixed with an addition of chloride of zinc, is transformed into a condition of finest division by suspending it in a solution of soap in water. In this manner an emulsion is produced the degree of fluidity of which and the percentage of tar-oil contained therein can be changed as required, according to the proportions used. Therefore the power of the impregnating emulsion to permeate the wood and its consequent effect on the latter can be regulated according to the density and degree of dryness of the wood and purpose for which it is used.
Hitherto the tar-oil used, generally unmixed, has required very great pressure to permeate all pores of the wood, which fact is also the result of the oily and inert character of this substance. The watery solution of the tar-oil effected with soap according to this process is of great mobility and has the capacity to easily adhere to the walls of the cell of which the wood is built up, and thus to cover them with a layer, protecting the same against rot and similar deterioration. Then the wood is impregnated in this manner, the fibers do not retain the impregnating fluid in excess, which is the case when heavy tar-oil is used in the ordinary manner, owing to the peculiar capillary conditions. Therefore a great amount of the impregnating fluid is saved,because the wood takes up only as much of the emulsion as is required to conserve it, the percentage of tar-oil being regulated as required.
Tar-oil solublein water can be prepared in different ways. One suitable way of doing it' consists in the use of one hundred parts of rosin, which is saponified by means of a suit able amount of sodium hydroxide and diluted with water, so that the final result is an aqueous soap solution of about one thousand parts in weight. In this soap solution there are stirred at a moderate temperature about one thousand parts, in weight, of heavy tar-oil, so that the result is a thick but nearly clear solution. If now this solution is poured in a thin stream in one thousand parts,in weight, of warm water, there will be produced a milky emulsion of tar-oil in which the oil is finely distributed to such a degree that the same will not be separated from the water by filtering through filtering-paper. This emulsion is pressed into the sleepers in autoclaves after the wood has been suitably steamed and evacuated.
WVhat I claim, and desire to secure by Letters Patent, is i The process for the preservation of wood which consists in forcing into the Wood under pressure, a preservative substance consisting of a watery emulsion composed of tar-oil, wa ter and soap, the water and soap serving as a means of dissolving and emulsifying the tar-oil, and as a vehicle for conveying and distributing the same through the pores of the wood.
In witness whereof I subscribe my signature in presence of two witnesses.
JULIUS SOHENKEL.
Witnesses:
Loursn BARNES, WILLIAM H. MADDEN.
US71998199A 1899-06-09 1899-06-09 Process of impregnating wood. Expired - Lifetime US655459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US71998199A US655459A (en) 1899-06-09 1899-06-09 Process of impregnating wood.

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US71998199A US655459A (en) 1899-06-09 1899-06-09 Process of impregnating wood.

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US655459A true US655459A (en) 1900-08-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5770265A (en) * 1995-09-26 1998-06-23 Triangle Laboratories, Inc. Environmentally friendly treatments to extend the functional life of wood structures and novel treated wood structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5770265A (en) * 1995-09-26 1998-06-23 Triangle Laboratories, Inc. Environmentally friendly treatments to extend the functional life of wood structures and novel treated wood structures

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