Treated porous material

Patent metadata

Field	Value
Publication number	US-10471625-B2
Application number	US-201515537246-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Dec 23, 2014
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a thermoset comprising a cured epoxy resin. The present disclosure further describes a method for preparing a treated cellulosic material comprising (a) providing a cellulosic material; and (b) a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion, the aqueous dispersion comprising an epoxy resin and an emulsifying agent.

First claim

What is claimed is:

1. A method for preparing a treated cellulosic material comprising:
(a) providing a cellulosic material;
(b) a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion, the aqueous dispersion comprising an epoxy resin and an emulsifying agent; and
(c) a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a curing agent and/or a catalyst suitable for curing the epoxy resin.

2. The method of claim 1 , wherein the impregnation of the first treatment protocol is conducted under a pressure that is greater than or lower than ambient.

3. The method of claim 1 , wherein the epoxy resin comprises, an aromatic or aliphatic glycidyl ether, a cycloaliphatic epoxy resin, a bisphenol F epoxy resin, a novolac epoxy resin, a glycidylamine-based epoxy resin, an alicyclic epoxy resin, a linear aliphatic epoxy resin, a tetrabromobisphenol A epoxy resin, polyglycidyl ethers of polyhydric alcohols, polyglycidyl ethers of polyhydric phenols, polyglycidyl amides, polyglycidyl imides, polyglycidyl hydantoins, polyglycidyl thioethers, epoxidized fatty acids, epoxidized drying oils, epoxidized polyolefins, epoxidized di-unsaturated acid esters, epoxidized unsaturated polyesters, a bisphenol A diglycidyl ether, a bisphenol F diglycidyl ether, a resorcinol diglycidyl ether, triglycidyl ethers of para-aminophenols, reaction products of epichlorohydrin with o-cresol, phenol novolacs, or mixtures thereof.

4. The method of claim 1 , wherein the modifying agent comprises a polyfunctional alcohol, a phenol, a cycloaliphatic carboxylic acid, an aromatic amine, or an aminophenol reacted with epichlorohydrin.

5. The method of claim 1 , wherein the emulsifying agent comprises a surfactant.

6. The method of claim 5 , wherein the surfactant comprises an epoxy functional surfactant, a nonionic surfactant, an anionic surfactant or a mixture thereof.

Assignees

• Dow Global Technologies Llc

Inventors

• Chen Xue
• King Stephen W

Classifications

• C08L63/04

  Epoxynovolacs · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C08L97/02

  Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · 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

• C08L63/00

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title