Treated porous material

Patent metadata

Field	Value
Publication number	US-10695944-B2
Application number	US-201515315236-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jun 30, 2014
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

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; and a modifying agent comprising an epoxy.

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 a modifying agent, the modifying agent comprising an epoxy resin; and
(c) a second treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polymer, the polymer comprising an olefin-carboxylic acid copolymer,
the first treatment protocol and the second treatment protocol being performed simultaneously such that the epoxy resin and the aqueous dispersion are premixed to prepare a treating agent dispersion.

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

3. The method of claim 1 , wherein the modifying agent comprises a polyglycidyl ether of polyhydric alcohol, polyglycidyl ether of polyhydric phenol, polyglycidyl amine, polyglycidyl amide, polyglycidyl imide, polyglycidyl hydantoin, polyglycidyl thioether, epoxidized fatty acid, epoxidized drying oil, epoxidized polyolefin, epoxidized di-unsaturated4 acid ester, epoxidized unsaturated polyester, or mixtures thereof.

4. The method of claim 1 , wherein the olefin-carboxylic acid copolymer comprises, in polymerized form, a monomer selected from the group consisting of ethylene, propylene, 1-butene, 3-methyl-1-butene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1-heptene, 1-hexene, 1-octene, 1-decene, 1-dodecene, butadiene, styrene, (meth)acrylic acid, maleic acid, maleic anhydride, or a mixture thereof.

5. The method of claim 1 , wherein the olefin-carboxylic acid copolymer is a copolymer of an olefin monomer and comonomer having a polar group.

6. The method of claim 5 , wherein the polar group is one or more of a carboxylic acid, carboxylic acid anhydride, carboxylic acid ester, carboxylic acid salt, or carboxylic acid amide.

7. The method of claim 1 wherein the olefin-carboxylic acid copolymer is an ethylene/acrylic acid (EAA) copolymer, ethylene/methacrylic acid copolymer (EMAA), or combination thereof.

8. The method of claim 1 , wherein the first treatment protocol and the second treatment protocol are conducted by depositing the cellulosic material in a vessel and holding the vessel at vacuum prior to pressurizing the vessel to a pressure of 0.1 to 1.7 MPa.

9. The method of claim 8 , wherein prior to pressurizing the vessel and after holding the vessel at vacuum, introducing the treating agent dispersion to the vessel.

Assignees

• Dow Global Technologies Llc

Inventors

• King Stephen W
• Chen Xue

Classifications

• B27K3/153 Primary

  Without in-situ polymerisation, condensation, or cross-linking reactions · CPC title

• C08L23/0876

  Salts thereof, i.e. ionomers · CPC title

• B27K3/156

  Combined with grafting onto wood fibres · CPC title

• C08L23/0869

  with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters · CPC title

• C08L33/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title