Treated porous material

Patent metadata

Field	Value
Publication number	US-10166693-B2
Application number	US-201515315222-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jun 30, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

The present disclosure describes 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 polymer comprising an olefin-carboxylic acid copolymer; a modifying agent comprising a bivalent, trivalent, or tetravalent metal ion.

First claim

What is claimed is:

1. A method for preparing a treated cellulosic material comprising:
(a) providing a cellulosic material comprising wood or wood composite materials;
(b) a first treatment protocol comprising impregnating the cellulosic material under a pressure greater than or lower than ambient with an aqueous dispersion comprising a polymer, the polymer comprising an olefin-carboxylic acid copolymer; and
(c) a second treatment protocol comprising impregnating the cellulosic material under a pressure greater than or lower than ambient with a modifying agent, the modifying agent comprising a bivalent, trivalent, or tetravalent metal ion.

2. The method of claim 1 , wherein the impregnating of the first treatment protocol and the second treatment protocol is conducted under pressure greater than ambient.

3. The method of claim 1 , wherein the modifying agent comprises Ca 2+ , Zn 2+ , Mg 2+ , Ba 2+ , Fe 2+ , Cu 2+ , Sn 2+ , S 2+ , Ni 2+ , Fe 3+ , B 3+ , P 3+ , Al 3+ , Cu 3+ , La 3+ , Y 3+ , Ga 3+ , Si 4+ , S 4+ , Ti 4+ , Zr 4+ , Sn 4+ , Ce 4+ , Hf 4+ or a mixture thereof.

4. The method of claim 1 , wherein the polymer is ethylene/acrylic acid copolymer.

5. The method of claim 1 , wherein the polymer comprises a styrene/acrylic acid copolymer.

6. The method of claim 1 , wherein 10 to 80 mole percent of the carboxylic acid portion of the copolymer is neutralized with a base prior to impregnating in the cellulosic material.

7. The method of claim 1 , wherein the first treatment protocol comprises the following steps: (a) depositing the cellulosic material prepared according to the first treatment protocol in a vessel; (b) holding the vessel at vacuum for 5 to 60 minutes; (c) introducing the dispersion to the vessel; (d) pressurizing the vessel to 1.03 MPa for 5 to 60 minutes; (e) draining the excess dispersion; (f) optionally removing excess dispersion by vacuum; and (g) air drying the cellulosic material at 20 to 60° C. for 24 to 48 hours.

8. The method of claim 1 , wherein the second treatment protocol comprises the following steps: (a) depositing the cellulosic material in a vessel; (b) holding the vessel at vacuum for 5 to 60 minutes; (c) introducing the polymer to the vessel; (d) pressurizing the vessel to 1.03 MPa for 5 to 60 minutes; (e) draining the excess polymer; (f) removing excess polymer by vacuum; and (g) air drying the cellulosic material at 20 to 60° C. for 24 to 48 hours.

Assignees

• Dow Global Technologies Llc

Inventors

• Chen Xue
• King Stephen W
• Malotky David L

Classifications

• C09D133/02

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C08H8/00 Primary

  Macromolecular compounds derived from lignocellulosic materials {(pretreatment thereof B27N)} · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• C08L23/0876

  Salts thereof, i.e. ionomers · CPC title

• C08K3/10

  Metal compounds · CPC title