# US 4,399,195 A · Preservation of wood > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,399,195 A - Document ID: US4399195A - Status: Granted - Kind: A - Application number: 06/295,850 - Filed: 1981-08-24 - Granted: 1983-08-16 - Earliest claimed: 1981-08-24 - Assignees: Cherokee Industries, Inc. - Inventors: William R. Allen, Sr. - Web page: https://patentgrep.com/patent/US4399195A ## CPC - B27K 3/08: Impregnating by pressure {, e.g. vacuum impregnation} - B27K 3/15: Impregnating involving polymerisation {including use of polymer-containing impregnating agents (macromolecular compounds derived from lignocellulosic materials C08H; compositions of lignin-containing materials C08L97/02)} - C08K 5/136: Phenols containing halogens - C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} - C08L 61/06: of aldehydes with phenols - Y10T 428/3196: Phenoplast - Y10T 428/662: Wood timber product [e.g., piling, post, veneer, etc.] - 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 (applying liquids or other fluent materials to surfaces in general B05; coating wood or similar material B44D); CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Wood is preserved with a water-based treating solution containing a halogenated phenol wood preservative such as pentachlorphenol, a phenolic resin prepolymer such as a phenol formaldehyde prepolymer, and a coupling or solubilizing agent for enhancing the water compatibility of the various ingredients. The treatment is carried out by exposing the wood, while submerged in the treating solution, so one or more cycles of reduced pressure (i.e. vacuum) and elevated pressure. ## Claims ### Claim 1 An aqueous water-dilutable concentrate suitable for treating wood by deep penetration, said concentrate consisting essentially of: (a) an effective wood preserving amount of a halogenated phenol wood preservative; (b) an effective amount of a phenolic resin prepolymer which after curing is sufficient to prevent the migration of the halogenated phenol from the wood; and (c) a polar cosolvent coupling agent present in an effective amount sufficient for enhancing the water solubility of said concentrate. ### Claim 2 (depends on 1) Concentrates of claim 1 in which the halogenated phenol is penta-chloro phenol. ### Claim 3 (depends on 2) Concentrates of claim 2 in which the resin prepolymer is a phenol formaldehyde prepolymer. ### Claim 4 (depends on 3) Concentrates of claim 3 in which the weight ratio of halogenated phenol to resin prepolymer is from 3:1 to 1:15. ### Claim 5 (depends on 4) Concentrates of claim 4 in which the coupling agent comprises methyl alcohol. ### Claim 6 A water dilutable concentrate for treating wood, said concentrate having a solids content of at least 10% by weight and consisting essentially of: (a) penta chloro phenol; (b) phenol formaldehyde prepolymer, the weight ratio of penta chloro phenol to prepolymer being from 1:2 to 1:10; (c) methyl alcohol; (d) water; and (e) from 0 to 5% by weight of at least one surfactant. ### Claim 7 (depends on 1) Compositions of claim 1 which have been diluted with water to a water content of at least 50% by weight. ### Claim 8 (depends on 2) Compositions of claim 2 which have been diluted with water to a water content of at least 50% by weight. ### Claim 9 (depends on 3) Compositions of claim 3 which have been diluted with water to a water content of at least 50% by weight. ### Claim 10 (depends on 4) Compositions of claim 4 which have been diluted with water to a water content of at least 50% by weight. ### Claim 11 (depends on 5) Compositions of claim 5 which have been diluted with water to a water content of at least 50% by weight. ### Claim 12 (depends on 6) Compositions of claim 6 which have been diluted with water to a water content of at least 50% by weight and which contain copper-8-quinolinolate. ### Claim 13 The method of treating wood by deep penetration of a treating composition, said method comprising the steps of: (a) placing the wood to be treated in an evacuation zone and exposing the wood to pressures below atmospheric pressure for a time sufficient to remove moisture and other volatiles from the wood; (b) immersing the wood in a water based treating composition consisting essentially of a halogenated phenol wood preservative, a phenolic resin prepolymer, and a coupling agent; (c) maintaining the wood immersed in the treating composition under said reduced pressure until the solution has penetrated into the wood; (d) increasing the pressure above the liquid to a pressure above atmospheric to thereby increase the penetration of the wood by said treating agent; and (e) recovering treated wood. ### Claim 14 (depends on 12) Methods of claim 12 in which the treated wood is heated to accelerate the curing of the prepolymer. ### Claim 15 (depends on 14) Methods of claim 14 in which the heating is accomplished with steam. ### Claim 16 (depends on 13) Methods of claim 13 in which the halogenated phenol is penta-chloro phenol. ### Claim 17 (depends on 16) Methods of claim 16 in which the resin prepolymer is a phenol formaldehyde prepolymer. ### Claim 18 (depends on 17) Methods of claim 17 in which the weight ratio of halogenated phenol to resin prepolymer is from 3:1 to 1:15. ### Claim 19 (depends on 18) Methods of claim 18 in which the coupling agent comprises methyl alcohol. ### Claim 20 (depends on 19) Methods of claim 19 in which the treating agent consists essentially of: (a) penta chloro phenol; (b) phenol formaldehyde prepolymer, the weight ratio of penta chloro phenol to prepolymer being from 1:2 to 1:10; (c) methyl alcohol; (d) at least 50% by weight of water; and (e) from 0 to 5% by weight of at least one surfactant. ### Claim 21 (depends on 20) Methods of claim 20 in which the treating agent also contains copper-8-quinolinolate. ### Claim 22 (depends on 20) Methods of claim 20 in which the wood is green and in which steps "c" and "d" are repeated from 1 to 30 times. ### Claim 23 (depends on 13) Treated wood produced by the process of claim 13. ### Claim 24 (depends on 14) Treated wood produced by the process of claim 14. ### Claim 25 (depends on 15) Treated wood produced by the process of claim 15. ### Claim 26 (depends on 16) Treated wood produced by the process of claim 16. ### Claim 27 (depends on 17) Treated wood produced by the process of claim 17. ### Claim 28 (depends on 18) Treated wood produced by the process of claim 18. ### Claim 29 (depends on 19) Treated wood produced by the process of claim 19. ### Claim 30 (depends on 20) Treated wood produced by the process of claim 20. ### Claim 31 (depends on 21) Treated wood produced by the process of claim 21.