Method for producing modified wood-based material, furan derivative resinification solution, and modified wood-based material

Patent metadata

Field	Value
Publication number	US-2023264382-A1
Application number	US-202118006995-A
Country	US
Kind code	A1
Filing date	Jul 27, 2021
Priority date	Jul 29, 2020
Publication date	Aug 24, 2023
Grant date	—

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.

First 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.

2 . The method according to claim 1 , wherein a solvent in the furan derivative resinification solution is an aqueous medium.

3 . 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.

4 . 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.

5 . 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.

6 . 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.

7 . 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.

8 . The method according to claim 1 , wherein the step 1) is performed under a reduced pressure of less than the atmospheric pressure.

9 . The method according to claim 1 , wherein the heating in the step 2) is performed at 80 to 160° C.

10 . The method according to claim 1 , wherein the wood-based material is a coniferous material.

11 . The method according to claim 1 , wherein the wood-based material is a cedar material or a cypress material.

12 . 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.

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.

14 . The furan derivative resinification solution according to claim 13 , wherein a solvent in the furan derivative resinification solution is an aqueous medium.

15 . A modified wood-based material modified by the method according to claim 1 , comprising at least a polymerized furan derivative.

16 . 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.

Assignees

• Furanwood Co Ltd
• Kyoto Prefectural Public Univ Corp

Inventors

• Itoh Takafumi
• Miyafuji Hisashi
• Furuta Yuzo
• Kojiro Keisuke
• Horiyama Hiroaki
• Otsuka Yukari
• Ohara Fujio
• Ito Hiroki
• Yamazaki Yoshiko

Classifications

• B27K3/0292

  for improving fixation (B27K3/0285 takes precedence) · CPC title

• B27K5/001

  Heating · CPC title

• B27K3/20

  Compounds of alkali metals or ammonium · CPC title

• B27K3/52 Primary

  Impregnating agents containing mixtures of inorganic and organic compounds · CPC title

• B27K3/15 Primary

  Impregnating involving polymerisation {including use of polymer-containing impregnating agents (macromolecular compounds derived from lignocellulosic materials C08H; compositions of lignin-containing materials C08L97/02)} · CPC title