# US 2023/0264382 A1 · Method for producing modified wood-based material, furan derivative resinification solution, and modified wood-based material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0264382 A1 - Document ID: US20230264382A1 - Status: Published application - Kind: A1 - Application number: 18/006,995 - Filed: 2021-07-27 - Published: 2023-08-24 - Earliest claimed: 2020-07-29 - Assignees: Furanwood Co., Ltd.; Kyoto Prefectural Public University Corporation - Applicants: Furanwood Co., Ltd.; Kyoto Prefectural Public University Corporation - Inventors: Takafumi ITOH; Hisashi MIYAFUJI; Yuzo FURUTA; Keisuke KOJIRO; Hiroaki HORIYAMA; Yukari OTSUKA; Fujio OHARA; Hiroki ITO; Yoshiko YAMAZAKI - Web page: https://patentgrep.com/patent/US20230264382A1 ## CPC - 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)} - B27K 3/0292: {for improving fixation (B27K3/0285 takes precedence)} - B27K 3/08: Impregnating by pressure {, e.g. vacuum impregnation} - B27K 3/20: Compounds of alkali metals or ammonium - B27K 3/32: Mixtures of different inorganic impregnating agents - B27K 3/343: {Heterocyclic compounds} - B27K 3/52: Impregnating agents containing mixtures of inorganic and organic compounds - B27K 5/001: {Heating} - 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 ## Abstract A method of producing a wood-based material that is modified is provided. Specifically, there is provided a method of producing a wood-based material, comprising 1) a step of impregnating a wood-based material with a furan derivative resinification solution that comprises a furan derivative, an inorganic salt inhibiting polymerization of the furan derivative at normal temperature, and an inorganic salt accelerating polymerization of the furan derivative; and 2) a step of polymerizing the furan derivative in the furan derivative resinification solution impregnated into the wood-based material within the wood-based material by means of heating. ## Claims ### Claim 1 A method of producing a modified wood-based material, the method comprising: 1) impregnating a wood-based material with a furan derivative resinification solution that comprises a furan derivative, an inorganic salt inhibiting polymerization of the furan derivative at normal temperature, and an inorganic salt accelerating polymerization of the furan derivative; and 2) polymerizing the furan derivative in the furan derivative resinification solution impregnated into the wood-based material within the wood-based material by means of heating. ### Claim 2 (depends on 1) The method according to claim 1, wherein a solvent in the furan derivative resinification solution is an aqueous medium. ### Claim 3 (depends on 1) The method according to claim 1, wherein the inorganic salt inhibiting polymerization of the furan derivative at normal temperature is an inorganic salt that is decomposed and gasified by heating. ### Claim 4 (depends on 1) The method according to claim 1, wherein the inorganic salt inhibiting polymerization of the furan derivative at normal temperature is at least one selected from ammonium carbonate and ammonium hydrogen carbonate. ### Claim 5 (depends on 1) The method according to claim 1, wherein the inorganic salt accelerating polymerization of the furan derivative is an inorganic salt formed of an anion selected from a chloride ion and a sulfate ion, and a cation selected from an ammonium ion, a magnesium ion, and a hydrogen ion. ### Claim 6 (depends on 1) The method according to claim 1, wherein the concentration of the inorganic salt inhibiting polymerization of the furan derivative at normal temperature is 0.0001 to 0.004 mol with respect to 1 mol of the furan derivative. ### Claim 7 (depends on 1) The method according to claim 1, wherein the concentration of the inorganic salt accelerating polymerization of the furan derivative is 0.001 to 0.1 mol with respect to 1 mol of the furan derivative. ### Claim 8 (depends on 1) The method according to claim 1, wherein the step 1) is performed under a reduced pressure of less than the atmospheric pressure. ### Claim 9 (depends on 1) The method according to claim 1, wherein the heating in the step 2) is performed at 80 to 160° C. ### Claim 10 (depends on 1) The method according to claim 1, wherein the wood-based material is a coniferous material. ### Claim 11 (depends on 1) The method according to claim 1, wherein the wood-based material is a cedar material or a cypress material. ### Claim 12 (depends on 1) The method according to claim 1, wherein the concentration of the furan derivative in the furan derivative resinification solution is 5 to 50% by weight (not inclusive of 50% by weight) based on the whole furan derivative resinification solution. ### Claim 13 A furan derivative resinification solution for modifying a wood-based material, the furan derivative resinification solution comprising: a furan derivative; an inorganic salt inhibiting polymerization of the furan derivative at normal temperature; and an inorganic salt accelerating polymerization of the furan derivative. ### Claim 14 (depends on 13) The furan derivative resinification solution according to claim 13, wherein a solvent in the furan derivative resinification solution is an aqueous medium. ### Claim 15 (depends on 1) A modified wood-based material modified by the method according to claim 1, comprising at least a polymerized furan derivative. ### Claim 16 (depends on 15) The modified wood-based material according to claim 15, which is used for a flooring material, a deck, an exterior wall material, a louver, a furniture, a truck body, a wooden fence, a guardrail, an exterior material, and/or a musical instrument.