Compositions and methods of making paper products

Patent metadata

Field	Value
Publication number	US-9506195-B2
Application number	US-201615046741-A
Country	US
Kind code	B2
Filing date	Feb 18, 2016
Priority date	Jun 22, 2012
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin.

First claim

The invention claimed is:

1. A paper formed by a method comprising treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising: an anionic polyacrylamide resin and an aldehyde functionalized polymer resin, wherein the complex of the anionic polyacrylamide resin and the aldehyde-functionalized polymer resin possesses a net cationic charge.

2. The paper of claim 1 , wherein the paper has a higher retention of fiber/particulate as compared to a paper that has not been treated with the treatment composition.

3. The paper of claim 1 , wherein the treatment composition is about 0.01 to 2 wt % of the aqueous pulp slurry that includes the cellulosic fiber.

4. The paper of claim 1 , wherein the weight ratio of aldehyde-functionalized polymer resin to anionic polyacrylamide resin is about 100:1 to about 1:100.

5. The paper of claim 1 , wherein the anionic polyacrylamide resin is a copolymer with an overall anionic charge of about 5 to 70 mol %.

6. The paper of claim 1 , wherein the anionic polyacrylamide resin has a standard viscosity higher than 1.5 cps.

7. The paper of claim 1 , wherein the aldehyde-functionalized polymer has a charge density greater than 20%.

8. The paper of claim 1 , wherein the paper is a paper product that is selected from the group consisting of a dry paper board, a fine paper, a towel, a tissue, and a newsprint product.

9. A cellulosic fiber treatment system comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin, wherein a complex of the anionic polyacrylamide resin and the aldehyde-functionalized polymer resin possesses a net cationic charge.

10. The treatment system of claim 9 , wherein the weight ratio of the aldehyde-functionalized polymer resin to anionic polyacrylamide resin is about 100:1 to about 1:100.

11. The treatment system of claim 9 wherein the anionic polyacrylamide resin is a copolymer with an overall anionic charge of about 5 to 70 mol %, and a standard viscosity higher than 1.5 cps.

12. The treatment system of claim 9 , wherein the anionic polyacrylamide resin and an aldehyde-functionalized polymer resin are added separately to the cellulosic fiber.

13. The treatment system of claim 9 , wherein the anionic polyacrylamide resin and the aldehyde-functionalized polymer resin are applied to the cellulosic fiber simultaneously.

14. The treatment system of claim 9 , wherein the anionic polyacrylamide resin and the aldehyde-functionalized polymer resin are applied to the cellulosic fiber sequentially.

Assignees

• Kemira Oyj

Inventors

• Chen Junhua
• Lu Chen
• Rosencrance Scott
• Zimmermann Frank

Classifications

• D21H17/47

  Condensation polymers of aldehydes or ketones · CPC title

• D21H21/10

  Retention agents or drainage improvers · CPC title

• D21H17/37

  Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates · CPC title

• D21H17/375

  Poly(meth)acrylamide · CPC title

• D21H21/18

  Reinforcing agents · CPC title