Wet strength treated paper and paperboard
US-2015020985-A1 · Jan 22, 2015 · US
Treated porous material
US11040462B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11040462-B2 |
| Application number | US-201615771517-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 26, 2016 |
| Priority date | Oct 27, 2015 |
| Publication date | Jun 22, 2021 |
| Grant date | Jun 22, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
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, the polymer comprising a polyurethane polymer. The present disclosure further describes a method for preparing a treated cellulosic material comprising providing a cellulosic material; and a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polymer, the polymer comprising a polyurethane polymer; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic amine.
First claim
Opening claim text (preview).
What is claimed is: 1. 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 comprising a polymer, the polymer comprising a polyurethane polymer; and (c) a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic amine. 2. The method of claim 1 , wherein the impregnating of the first and second treatment protocols is conducted under pressure greater than or lower than ambient. 3. The method of claim 1 , wherein the polyurethane polymer comprises a water-dispersible polyurethane. 4. The treated cellulosic material of claim 2 , wherein the water-dispersible polyurethane comprises the acidic or anionic form of dimethylolpropionic acid. 5. The treated cellulosic material of claim 3 , wherein the water-dispersible polyurethane comprises a thermosplastic polyurethane or a thermosetting polyurethane.
Assignees
Inventors
Classifications
Nitrogen-containing compounds · CPC title
Amines; Quaternary ammonium compounds · CPC title
- C08L97/02Primary
Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)} · CPC title
- B27K3/153Primary
Without in-situ polymerisation, condensation, or cross-linking reactions · CPC title
Polyurethanes · CPC title
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Frequently asked questions
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- What does patent US11040462B2 cover?
- 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, the polymer comprising a polyurethane polymer. The present disclosure further describes a method for preparing a treated cellulosic material comprising providing …
- Who is the assignee on this patent?
- Dow Global Technologies Llc
- What technology area does this patent fall under?
- Primary CPC classification C08L97/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 22 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).