US2062877A - Wood treatment and product - Google Patents

Wood treatment and product Download PDF

Info

Publication number
US2062877A
US2062877A US11317A US1131735A US2062877A US 2062877 A US2062877 A US 2062877A US 11317 A US11317 A US 11317A US 1131735 A US1131735 A US 1131735A US 2062877 A US2062877 A US 2062877A
Authority
US
United States
Prior art keywords
wood
arsenic
colloidal
sulfide
gelatin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US11317A
Inventor
Joseph L Goodale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US11317A priority Critical patent/US2062877A/en
Application granted granted Critical
Publication of US2062877A publication Critical patent/US2062877A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/28—Compounds of arsenic or antimony
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/907—Resistant against plant or animal attack
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/4935—Impregnated naturally solid product [e.g., leather, stone, etc.]
    • Y10T428/662—Wood timber product [e.g., piling, post, veneer, etc.]

Definitions

  • the present invention relates to the treatment of wood to protect the same against attack by marine borers, termites and the like, and to the product of such treatment.
  • my improved treatment of the Wood involves the introduction of a colloidal arsenic compound, for example, a colloidal dispersion of arsenic sulfide or sulfides, preferably stabilized by a protective colloid, and eventual precipitation of the suspensoid and emulsoid in the wood.
  • a colloidal arsenic compound for example, a colloidal dispersion of arsenic sulfide or sulfides, preferably stabilized by a protective colloid
  • a protective colloid such as gelatin or glue, which is afiected by tannin
  • a protective colloid which is afiected by tannin
  • the tannin generally present in wood will then act upon the gelatin to cause or permit agglomeration of the colloidal particles and the arsenic sulfides will be deposited in the intercellular spaces (often referred to in the art as air cavities or air cells) of the wood.
  • the use of a protective colloid which is coagulated by tannin already present in the wood also results in occlusion of the air cavities of the wood by the coagulated gelatin and consequently diminishes the extent to which the toxic deposit is exposed to leaching.
  • arsenic sulfides are practically insoluble in water and thus resist leaching from the wood, in the digestive tract of an animal organism they give the characteristic arsenic action on the organism.
  • the colloidal dispersion of arsenic sulfide is conveniently prepared by adding a soluble sulfide to a soluble salt of arsenious acid in the presence of a protective co1loid,preierably a protective colloid coagulable by tannin. It is believed that arsenious trisulfide and other sulfides of arsenic may be formed.
  • Sodium arsenite, gelatin and calcium persulfide are inexpensive and readily handled materials well adapted for use in preparing the colloid but it will be obvious that 5 other materials and procedures are available and fall within the scope of my invention.
  • the colloidal dispersion may be introduced into the Wood (preferably to refusal) by standard commercial processes, such, for example, as the 1 standard vacuum pressure process or any other suitable process.
  • standard commercial processes such, for example, as the 1 standard vacuum pressure process or any other suitable process.
  • the presence of the protective colloid maintains the sulfide particles in a state of dispersion during the time necessary for introduction into the wood. After such introduc- 15 tion these particles gather together in clusters which are too large to be translocated from their position in the intercellular spaces of the wood.
  • the wood contains tannin, the tannin causes coagulation of the gelatine, which becomes insoluble and elastic.
  • the physical structure of the wood should be sufiiciently porous to permit adequate penetration of the colloid.
  • the method of treating wood which comprises introducing a colloidal dispersion of arsenic sulfide in the presence of a protective colloid into the wood, the tannin in the wood act- 35 ing upon the protective colloid to cause agglomeration of the colloidal particles whereby arsenic sulfide is deposited in intercellular spaces of the wood.
  • the method which comprises introducing 4o colloidal arsenic sulfide in the form of a sol containing gelatin, into intercellular spaces of wood, the gelatin acting to preserve the colloidal state of the arsenic sulfide during introduction but the action of a constituent in the wood then 45 causing the colloidal arsenic sulfide particles to agglomerate, whereby arsenic sulfide is deposited within the wood.
  • the method of treating wood which comprises mixing a solution of sodium arsenite containing gelatin with a solution of calcium persulfide to form colloidal arsenic trisulfide, introducing the resulting arsenic sulfide into intercellular spaces of the Wood and coagulating the colloidal particles to deposit arsenic sulfide in the intercellular spaces of the wood.
  • the method which comprises introducing into wood colloidal arsenic sulfide, said sulfide being in. the form of a sol containing gelatin, whereupon tannin in the wood acts upon the gelatin to cause agglomeration of the colloidal particles and arsenic and water-insoluble gelatin are deposited within the wood.

Landscapes

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

Description

Patented Dec. 1, 1936 UNETED STATES WOOD TREATNIENT AND PRODUCT Joseph L. Goodale, Ipswich, Mass.
No Drawing. Application March 15, 1935, Serial No. 11,317
8 Claims.
The present invention relates to the treatment of wood to protect the same against attack by marine borers, termites and the like, and to the product of such treatment.
The destructive attacks of marine borers and termites upon wood piling, posts, and in fact any wood to which they have access, is a source of great loss. It is an object of the present invention to provide an improved treatment which will protect the wood against attack by these organisms and also a novel product comprising wood so treated.
In general, my improved treatment of the Wood involves the introduction of a colloidal arsenic compound, for example, a colloidal dispersion of arsenic sulfide or sulfides, preferably stabilized by a protective colloid, and eventual precipitation of the suspensoid and emulsoid in the wood. The selection of a protective colloid such as gelatin or glue, which is afiected by tannin, is advantageous in that while such protective colloid will act to maintain the arsenic sulfides in a colloidal condition during impregnation of the wood, the tannin generally present in wood will then act upon the gelatin to cause or permit agglomeration of the colloidal particles and the arsenic sulfides will be deposited in the intercellular spaces (often referred to in the art as air cavities or air cells) of the wood. The use of a protective colloid which is coagulated by tannin already present in the wood also results in occlusion of the air cavities of the wood by the coagulated gelatin and consequently diminishes the extent to which the toxic deposit is exposed to leaching.
The toxic efiect of the arsenic so deposited protects the wood against the attack of destructive animal organisms. Although arsenic sulfides are practically insoluble in water and thus resist leaching from the wood, in the digestive tract of an animal organism they give the characteristic arsenic action on the organism.
The colloidal dispersion of arsenic sulfide is conveniently prepared by adding a soluble sulfide to a soluble salt of arsenious acid in the presence of a protective co1loid,preierably a protective colloid coagulable by tannin. It is believed that arsenious trisulfide and other sulfides of arsenic may be formed.
As an example of one method of preparing a colloidal dispersion of arsenic sulfide for use in my invention I give the following: A 1% aqueous solution of sodium arsem'te in which is dissolved one to ten grams of gelatin per liter of solution is mixed with about one-half its volume or more of calcium persulfide solution having a specific gravity of 1.010. Sodium arsenite, gelatin and calcium persulfide are inexpensive and readily handled materials well adapted for use in preparing the colloid but it will be obvious that 5 other materials and procedures are available and fall within the scope of my invention.
The colloidal dispersion may be introduced into the Wood (preferably to refusal) by standard commercial processes, such, for example, as the 1 standard vacuum pressure process or any other suitable process. The presence of the protective colloid maintains the sulfide particles in a state of dispersion during the time necessary for introduction into the wood. After such introduc- 15 tion these particles gather together in clusters which are too large to be translocated from their position in the intercellular spaces of the wood. If the wood contains tannin, the tannin causes coagulation of the gelatine, which becomes insoluble and elastic. The physical structure of the wood should be sufiiciently porous to permit adequate penetration of the colloid.
I do not use the term arsenic herein to designate any particular valence of this element, 25 but broadly to designate any valence thereof.
As a result of my treatment, toxic arsenic sulfides are deposited within the wood and protect the wood against attack by destructive organ isms as previously mentioned.
I claim:
1. The method of treating wood which comprises introducing a colloidal dispersion of arsenic sulfide in the presence of a protective colloid into the wood, the tannin in the wood act- 35 ing upon the protective colloid to cause agglomeration of the colloidal particles whereby arsenic sulfide is deposited in intercellular spaces of the wood.
2. The method which comprises introducing 4o colloidal arsenic sulfide in the form of a sol containing gelatin, into intercellular spaces of wood, the gelatin acting to preserve the colloidal state of the arsenic sulfide during introduction but the action of a constituent in the wood then 45 causing the colloidal arsenic sulfide particles to agglomerate, whereby arsenic sulfide is deposited within the wood.
3. The treatment of wood which comprises as steps mixing a soluble salt of arsenious acid, in 50 the presence of a protective colloid, with a soluble sulfide to produce colloidal arsenic sulfide, impregnating wood with the resulting sol, agglomerating the colloidal particles and depositing arsenic sulfide in the Wood.
4. The method of treating wood which comprises mixing a solution of sodium arsenite containing gelatin with a solution of calcium persulfide to form colloidal arsenic trisulfide, introducing the resulting arsenic sulfide into intercellular spaces of the Wood and coagulating the colloidal particles to deposit arsenic sulfide in the intercellular spaces of the wood.
5 The method which comprises introducing into wood colloidal arsenic sulfide, said sulfide being in. the form of a sol containing gelatin, whereupon tannin in the wood acts upon the gelatin to cause agglomeration of the colloidal particles and arsenic and water-insoluble gelatin are deposited within the wood.
6. The method of treating wood which comprises introducing colloidal arsenic sulfide, in
the presence of a protective colloid, into the wood, whereupon a constituent of the wood acts to agglomerate the colloidal arsenic sulfide particles, whereby arsenic sulfide is deposited in intercellular spaces of the wood.
7. As a new product, wood containing a coagulated sol of arsenic sulfide, said arsenic sulfide being present as a deposit in the wood after action by a constituent of the wood on a colloidal dispersion of arsenic sulfide containing a protective colloid.
8. As a new product, wood impregnated with a coagulated sol of arsenic sulfide and a protective colloid comprising gelatin, said arsenic sulfide being present as a deposit, after action on said gelatin by a constituent of the wood.
JOSEPH L. GOODALE.
US11317A 1935-03-15 1935-03-15 Wood treatment and product Expired - Lifetime US2062877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11317A US2062877A (en) 1935-03-15 1935-03-15 Wood treatment and product

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11317A US2062877A (en) 1935-03-15 1935-03-15 Wood treatment and product

Publications (1)

Publication Number Publication Date
US2062877A true US2062877A (en) 1936-12-01

Family

ID=21749840

Family Applications (1)

Application Number Title Priority Date Filing Date
US11317A Expired - Lifetime US2062877A (en) 1935-03-15 1935-03-15 Wood treatment and product

Country Status (1)

Country Link
US (1) US2062877A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220688A (en) * 1978-08-31 1980-09-02 Ralph Mitchell Protecting wood from wood degrading organisms
US4732817A (en) * 1986-04-21 1988-03-22 Lotz W Robert Wood preservation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220688A (en) * 1978-08-31 1980-09-02 Ralph Mitchell Protecting wood from wood degrading organisms
US4732817A (en) * 1986-04-21 1988-03-22 Lotz W Robert Wood preservation

Similar Documents

Publication Publication Date Title
DE2610698A1 (en) MEDICAL ARTICLE WITH A THROMBOSIS-PREVENTING SURFACE COVER AND METHOD FOR MANUFACTURING IT
DE3432143C2 (en) Process for encapsulating a material to be encapsulated and capsules thus produced
DE2546166A1 (en) TANNED THROMBOCYTE
US2951753A (en) Method of making soil conditioning materials
DE2016484C3 (en) Process for increasing the water solubility of microcapsules
CH506485A (en) Process for the production of heavy metal complexes of new tetrakosapeptides
US2062877A (en) Wood treatment and product
Swaby The influence of humus on soil aggregation
CN110476984B (en) Application of high-water-absorptivity bamboo fiber polysaccharide in preparation of rat intestinal stalk resistance agent
CN110788948A (en) Preparation method of wood product insect-resist agent
Harvey Note on colloidal ferric hydroxide in sea water
US4206197A (en) Chemical encapsulation and distribution
US2206975A (en) Poison for combating insects
Salthouse A quantitative histochemical method for estimating phospholipids
US1620152A (en) Method of preserving wood and solutions therefor
US2904466A (en) Preservative composition comprising tetraalkali metal pyrophosphate, a polychlorophenate and a heavy metal salt
JPH0768508A (en) Timber preservative
Robertson Studies on the fertilization of the eggs of a sea urchin Strongylocentrotus purpuratus by blood-sera, sperm, sperm extracts and other fertilizing agents
US2375773A (en) Stabilization of pyrethrum preparations
US2637691A (en) Wood preservation
US2056121A (en) Insecticide and method of making same
DE545457C (en) Process for the production of agents for combating plant and animal pests
AT103218B (en) Process for the production of a durable yeast preparation for baking purposes.
US1621240A (en) Vermifuge and insecticide
Johnsen Pestox III and bees