US3695920A - Esthetic wood product - Google Patents
Esthetic wood product Download PDFInfo
- Publication number
- US3695920A US3695920A US3695920DA US3695920A US 3695920 A US3695920 A US 3695920A US 3695920D A US3695920D A US 3695920DA US 3695920 A US3695920 A US 3695920A
- Authority
- US
- United States
- Prior art keywords
- wood
- preservative
- color
- esthetic
- organic
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/104—Pretreatment of other substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
Definitions
- This invention relates to a method of coloring and protecting wood and to the wood products so produced. More particularly, this invention relates to improving the esthetic value of wood resistant to wood destroying organisms.
- Color has been imparted to wood previously treated with an organic preserving system to improve the esthetic value in various ways.
- Oil-base paints and numerous pigmented latex coatings have been used but with only limited success. Numerous diverse coating materials do not adhere to the wood. The coatings blister, flake or chalk off of the wood in a short time, for example, about one year on wood preserved with an organic preservative system. This short period of color retention is not nearly coextensive with the useful life of the wood in most applications.
- the failure of most coatings on wood preserved with an organic preservative system can be traced to the treatment given the wood for protection against wood destroying organisms and/or the color coating system employed.
- pentachlorophenol has met with great commercial acceptance.
- pentachlorophenol dissolved in a suitable solvent is impregnated into the wood as by the well known pressure or thermal processes.
- the solvent is removed after impregnation by drying the wood.
- the pentachlorophenol penetrates into the wood and to a substantial extent remains impregnated in the wood after the solvent has been removed.
- One difficulty however is that there is a tendency for some of the pentachlorophenol to migrate out of the wood during both solvent evaporation and after the wood has dried. This phenomenon is referred to as blooming by the industry. The blooming of such phenolic compositions seriously affects the paintability of treated wood.
- the wood cannot be coated for color with oil-base or latex paints and then treated with preservative since the preservative does not penetrate these coatings to an extent suflicient to be of value in preserving the pole.
- the oilbase coatings and latex-binder containing coatings make the poles non-breathable and the preservative will not penetrate. Moreover, many preservatives would destroy the oil-base or latex coating.
- An object of this invention is wood having both long lasting esthetic value and protection against wood destroying organisms.
- Another object of this invention is a method for the preparation of wood having long lasting esthetic value and protection against wood destroying organisms.
- the above and other objects of this invention are carried out by the method which comprises imparting color to non-preserved wood with an aqueous pigment composition prior to treating the wood with an organic preserving system.
- the method of this invention results in preserved wood having long lasting esthetic value.
- the wood after being colored by the aqueous pigment composition remains breathable and thus the preserving agent can readily penetrate into the wood. Blooming which may occur after preservation is not deleterious to the color coating since the color has already been imparted to the wooden member. Any such blooming does not cause the color to leave the pole as in the case of oil-base and latex-binder coatings since the color is bound by the wood and is not merely part of a binder system or coating thereon.
- any one of various well known methods of treating wood can be used depending on the desired treatment to the wood product and in particular the degree of penetration desired.
- color imparting treatment and the preserving treatment such methods include brushing, spraying, dipping, soaking and the like, and thermal and pressure impregnation.
- Pressure treatments include empty cell and full cell procedures.
- the wood In the empty cell procedure the wood is placed in a pressure vessel, commonly a horizontal cylinder, and moderate air pressure is applied. An impregnant solution is forced into the cylinder and thus into the wood. Pressure up to about 200 p.s.i.g. is applied forcing the preservative solution deep into the wood. The pressure is released and the unabsorbed liquid is removed from the cylinder. A vacuum is applied, and the residual air in the lumins of the wood expands, thereby forcing the excess liquid from the wood. The wood cell walls are thus covered with microscopic droplets of the preservative solution.
- the full cell pressure procedure involves the application of a high vacuum initially to the pressure vessel containing the wood.
- An impregnating solution is added to the cylinder and surrounds the wood while the vacuum is maintained. Positive pressure is then applied to force the impregnant into the wood. At the end of the impregnation period pressure is released, a final vacuum is applied and the unabsorbed liquid is removed from the cylinder.
- the impregnating solution may initially be admitted to the treating cylinder under atmospheric pressure in either procedure or under a low vacuum.
- the water dispersible pigments useful in the method of this invention include pigments well known to the art such as titanium dioxide white, yellow oxide, chrome yellow, Hausa yellow, azo yellow, molybdate orange, dinitroniline orange, toluidine red medium, red oxide light,
- the aqueous pigment compositions are prepared by adding water dispersible pigments and a dispersing agent to water and stirring.
- the pigment concentration in the aqueous pigment compositions may vary from about 0.001% to about 40% or more, depending on the intensity of color required on the treated wood.
- the aqueous pigment compositions useful in the method of this invention can also contain additional surfactants or wetting agents above the amount required for pigment dispersion in order to aid in dispersing the pigment into the outer fibers of the wood.
- the aqueous pigment compositions may be modified by the addition thereto of secondary materials, for example, extenders such as barium sulfate, zinc oxide, basic lead carbonate, calcium carbonate, silica and the various non-alkali metal silicates, adhesives and other materials having favorable action on the performance of the aqueous pigment composition and which do not interfere to any substantial extent with the breathability of the colored wood and thus the treatment with the preserving agent.
- secondary materials for example, extenders such as barium sulfate, zinc oxide, basic lead carbonate, calcium carbonate, silica and the various non-alkali metal silicates, adhesives and other materials having favorable action on the performance of the aqueous pigment composition and which do not interfere to any substantial extent with the breathability of the colored wood and thus the treatment with the preserving agent.
- the preserving agent used in the preserving system for the method of this invention can be any known organic preserving agent for wood which does not adversely affect the color imparted by prior treatment With the aqueous pigment composition.
- Suitable preserving agents include creosote, halogenated hydroxy containing compounds, carbamates, nitrophenols, organo-tin compounds, organocopper compounds, organic arsenic compounds, halogenated and copper naphthalene derivatives, S-quinoline compounds such as 8-hydroxyquinoline, and esters of polychlorophenols such as the acetate, laurate and butyrate esters.
- Halogenated hydroxy containing compounds suitable for the practice of this invention include halogenated monohydric phenols, halogenated polyhydric phenols and thiophenols and halogenated benzophenones and embrace halogenated parasiticidal phenols including alkyl and phenyl substituted phenols which have been chlorinated or brominated.
- Halogenated hydroxy compounds of particular value in the practice of this invention are those defined by a formula selected from the group consisting of (I) OH wherein R is selected from the group consisting of hydrogen, methyl, phenyl, chlorine and bromine, X is bromine or chlorine and n is an integer from 1 to 4 inclusive,
- Y is OH or SH and is attached at the carbon atom in the 2 and 2' positions
- X is chlorine or bromine and is attached at carbon atoms in the 4 and 4' or 5 and 5' positions of the phenyl rings.
- Suitable monohydric halophenols are those having mixed chlorine and bromine as well as those having 'a single halogen species and include 2-bromo-4-chlorophenol, 2-bromo-4, 6-dichlorophenol, 2,3,6-tribromo-p-cresol, 2,4,6-trichloro-m-cresol, 2,4,6-tribromo-rn-cresol, 2,6-dibromo-4-chlorophenol, 2-chloro-4-phenylphenol,
- Suitable polyhydric phenols and thiophenols and benzophenones include 4,4'-dichloro-2,2'dithiophenol, 4,4-dibromo-2,2-dithiophenol, 4,4-dibromo-2,2-dihydroxybenzophenone,
- the organic preserving agents used in this invention are generally dissolved in organic solvents which are water immiscible and have a low pour point.
- organic solvents which can be used for the preserving agents include alcohols, esters, amides, ketones, ethers and acetals; organic phosphates and phthalates; aromatic hydrocarbon solvents such as benzene, xyleen, toluene, cumene, mesitylenes and alkylnaphthalenes, and various petroleum products such as liquid petroleum gas, kerosene, mineral spirits, Stoddard solvent and the like. Mixtures of these solvents can also be employed.
- the two types of solvents are those that remain in the wood holding the preservative in solution and those that are volatile and deposit the preservative in the wood after solvent evaporation.
- the solvents that remain in the wood have a preferred initial boiling point above about 350 F. and a preferred 50% point above 500 F.
- Solvents that do not remain in the wood have a preferred boiling end point below about 400 F.
- a sequestering agent may be added to prevent precipitation of calcium and magnesium soaps.
- a sequestering agent particularly useful in the practice of this invention is an aqueous solution of the tetrasodium salt of ethylenediaminetetraaoetic acid (commercially available as Versene Powder, Versene 67, Versene 100).
- Other sequestering agents which can be used include the disodium salt and the trisodium salt of ethylenediaminetetraacetic acid and mixtures thereof.
- Wood which can be colored and preserved in accordance with the present invention are the green or seasoned hardwood and softwood.
- Illustrative varieties of hardwood being birch, maple, beech, ash, mahogany, walnut, hickory, gum and oak.
- Illustrative varieties of softwood being southern pine, ponderosa pine, Douglas fir, hemlock, western larch, jack pine, lodgepole pine, red pine, northern white pine, sugar pine, western white pine, red cedar and white cedar.
- the method of this invention is particularly useful for treating such wood products used as energy distribution and transmission poles, cross arms, fence posts, and for floors and platforms and the like.
- EXAMPLE 1 Southern yellow pine poles are colored gray by brushing with an aqueous pigment composition comprising 75% water, 24.94% Ti and 0.06% lamp black, dried for 24 hours at about 25 C. and pressure treated with a preservative composition comprising 86 parts Stoddard solvent, 7 parts pentachlorophenol and 7 parts polyalkyleneglycol ether by the empty cell procedure to a retention of 6 pounds preservative per cubic foot of wood.
- the poles are placed in the vertical position in an outside test yard. After about ten months the poles do not exhibit any loss of color from the environment or damage from wood destroying organisms.
- V-shaped sections each containing a large colored surface area are cut from the outside surface of the test poles of Example 1 after the test poles have been in the yard about three months.
- the V-shaped sections are placed in a four carbon rod Atlas Weatherometer and subjected to alternating water spray at a temperature of about 120 F. for accelerated exposure. After about five weeks of accelerated exposure (equivalent to about 17 months of normal exposure) the colored sections do not exhibit any sign of color loss.
- Method of producing wood having long lasting esthetic value which is also resistant to Wood destroying organisms comprising imparting color to non-preserved wood with an aqueous pigment composition prior to treatment with an organic preservative system comprising an "organic solution of an organic soluble preservative, wherein said aqueous pigment composition is substantially free of materials which adversely affect the treatment with organic soluble preservative and wherein the organic soluble preservative does not adversely affect the color imparted by prior treatment with the aqueous pigment composition.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3034970A | 1970-04-20 | 1970-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3695920A true US3695920A (en) | 1972-10-03 |
Family
ID=21853810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3695920D Expired - Lifetime US3695920A (en) | 1970-04-20 | 1970-04-20 | Esthetic wood product |
Country Status (2)
Country | Link |
---|---|
US (1) | US3695920A (en) |
CA (1) | CA976815A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839073A (en) * | 1970-04-20 | 1974-10-01 | Koppers Co Inc | Aesthetic wood product |
US3889020A (en) * | 1972-04-17 | 1975-06-10 | Reichhold Chemicals Inc | Method for treating wood |
US4840637A (en) * | 1986-11-21 | 1989-06-20 | Rolffs Philip C | Synthetic ebony and method of producing the same (I) |
-
1970
- 1970-04-20 US US3695920D patent/US3695920A/en not_active Expired - Lifetime
-
1971
- 1971-04-19 CA CA110,763A patent/CA976815A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839073A (en) * | 1970-04-20 | 1974-10-01 | Koppers Co Inc | Aesthetic wood product |
US3889020A (en) * | 1972-04-17 | 1975-06-10 | Reichhold Chemicals Inc | Method for treating wood |
US4840637A (en) * | 1986-11-21 | 1989-06-20 | Rolffs Philip C | Synthetic ebony and method of producing the same (I) |
Also Published As
Publication number | Publication date |
---|---|
CA976815A (en) | 1975-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4313976A (en) | Composition and process for coloring and preserving wood | |
CA1300441C (en) | Wood preservation system | |
US2970923A (en) | Method of preventing marine growth, and antifouling compositions useful for said method | |
EP0149625B1 (en) | Preservative composition | |
US4656060A (en) | Arsenical creosote wood preservatives | |
NZ552647A (en) | Wax-biocide wood treatment | |
US4382105A (en) | Water soluble pentachlorophenol and tetrachlorophenol wood treating systems containing fatty acid amine oxides | |
KR102422467B1 (en) | Eco-friendly low content acryl type wood oil stain having excellent wood fast permeable, fast drying, waterproofing, flame retarding and antimicrobial and the wood material impregnated and coated with the same | |
US4752297A (en) | Process for coloring wood with iron salt in water | |
US3839073A (en) | Aesthetic wood product | |
US4379810A (en) | Water soluble pentachlorophenol and tetrachlorophenol wood treating systems containing fatty acid amine oxides | |
US3695920A (en) | Esthetic wood product | |
US2789060A (en) | Pesticidal composition | |
US2209970A (en) | Wood preservation | |
GB2128091A (en) | Wood preservative composition | |
US3571943A (en) | Wood drying and preserving process | |
US4357163A (en) | Water soluble pentachlorophenol and tetrachlorophenol wood treating systems containing fatty acid amine oxides | |
CA2196975A1 (en) | Flavonoid aldehydes and use in paint | |
US4413023A (en) | Method of treating wood to prevent stain and decay | |
DE2231814A1 (en) | PRESERVATION AND PROTECTIVE AGENTS | |
EP0038932A2 (en) | Aqueous wood preservative | |
WO2006135858A1 (en) | Process for moisture-proofing wood | |
US3764378A (en) | Wood treated with a preservative composition | |
US3702784A (en) | Preservative compositions | |
IT9067843A1 (en) | IMPREGNATING WOOD FOR FINISHING |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: PITTSBURGH NATIONAL BANK, A NATIONAL BANKING ASSOC Free format text: SECURITY INTEREST;ASSIGNOR:KOP-COAT, INC.;REEL/FRAME:004963/0912 Effective date: 19880927 |
|
AS | Assignment |
Owner name: KOP-COAT, INC., A CORP. OF DE., PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KOPPERS COMPANY, INC., A DE. CORP.;REEL/FRAME:005075/0929 Effective date: 19890116 |
|
AS | Assignment |
Owner name: KOP-COAT, INC., A CORP. OF DE, PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KOP-COAT, INC. (MERGED INTO);WCG, INC. (CHANGED TO);REEL/FRAME:005238/0944 Effective date: 19890105 |