Treated porous material

Patent metadata

Field	Value
Publication number	US-11370919-B2
Application number	US-201716334583-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 30, 2016
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with an aqueous solution comprising a polymer, the polymer comprising a water-soluble polyetheramine; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising an aqueous dispersion comprising an epoxy-containing resin.

First claim

The invention claimed is:

1. A method for preparing a treated cellulosic material comprising:
(a) providing a cellulosic material;
(b) conducting a first treatment protocol comprising impregnating the cellulosic material with an aqueous solution comprising a polymer, the polymer comprising a water-soluble polyetheramine; and
(c) subsequently conducting a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising an aqueous dispersion comprising an epoxy-containing resin.

2. The method of claim 1 , wherein the polyetheramine is a polyether monoamine or a polyether diamine.

3. The method of claim 1 , wherein the epoxy-containing resin is an epoxy or an epoxy imbibed thermoplastic polymer.

4. The method of claim 3 , wherein the thermoplastic polymer portion of the epoxy imbibed thermoplastic polymer formulation is an acrylic latex.

5. The method of claim 1 , wherein the epoxy-containing resin is a diglycidyl ether of bisphenol A, the diglycidyl ether of bisphenol F, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, the diglycidyl ester of phthalic acid, 1,4-cyclohexanedimethanol diglycidyl ether, 1,3-cyclohexanedimethanol diglycidyl ether, the diglycidyl ester of hexahydrophthalic acid, or a novolac resin, or a combination thereof.

6. The method of claim 1 , further comprising impregnating the cellulosic material with an additive.

7. The method of claim 1 , further comprising coating the cellulosic material with a sealing agent.

8. The method of claim 1 , wherein at least one of the impregnation steps of the first treatment protocol and the second treatment protocol are conducted under pressure greater than or lower than ambient.

Assignees

• Dow Global Technologies Llc
• Dow Global Tech

Inventors

• King Stephen W
• Chen Xue

Classifications

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C08L97/02 Primary

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

• C08L79/02

  Polyamines · CPC title

• C08L63/04

  Epoxynovolacs · 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