IP Library › Granted Patent US 9,657,441
Granted Patent B2
US 9,657,441 · App. 14/465,159 · Granted May 23, 2017

Filler for paper making process

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Quick Facts
Patent No.
US 9,657,441
App. No.
14/465,159
Granted
May 23, 2017
Kind
B2
Abstract

The present invention relates to a filler comprising clay and cellulose derivative having a degree of substitution of net ionic groups up to about 0.65.

Claims (16)

1. A filler composition consisting of clay and an anionic cellulose derivative having a degree of substitution of net ionic groups of about 0.01 to about 0.60, wherein said clay has been modified by said cellulose derivative, and wherein said filler composition has a cellulose derivative content from 0.1 to 20% by weight, based on the weight of the solids of the filler.

2. The filler composition according to claim 1 , wherein the degree of substitution is up to about 0.50.

3. The filler composition according to claim 1 , wherein the degree of substitution is at least 0.05.

4. The filler composition according to claim 1 , wherein at least about 30% by weight of the cellulose derivate is adsorbed on or attached to the clay.

5. The filler composition according to claim 1 , wherein at least about 60% by weight of the cellulose derivate is adsorbed on or attached to the clay.

6. The filler composition according to claim 1 , wherein the cellulose derivative is a cellulose ether.

7. The filler composition according to claim 1 , wherein the cellulose derivative contains anionic groups selected from the group consisting of carboxylate, carboxyalkyl, sulphonate, sulphoalkyl, phosphate and phosphonate groups and mixtures thereof.

8. The filler composition according to claim 1 , wherein the cellulose derivative contains carboxymethyl groups.

9. The filler composition according to claim 1 , wherein the cellulose derivative is at least partly water soluble.

10. The filler composition according to claim 1 , wherein the filler composition has a cellulose derivative content from 0.3 to 10% by weight, based on the weight of the solids of the filler.

11. The filler composition according to claim 1 , wherein the clay is selected from the group consisting of talc, hydrotalcit, kaolin, calcinated clay, bentonite and mixtures thereof.

12. The filler composition according to claim 1 , wherein the clay is kaolin.

13. The filler composition according to claim 1 , wherein the clay is calcinated clay.

14. The filler composition according to claim 1 , wherein the clay is talc.

15. The filler composition according to claim 1 , wherein the clay has a particle size from about 0.1 μm to about 5 μm.

16. Paper comprising the filler composition according to claim 1 .

Assignments (4)
CHANGE OF NAME Recorded Sep 18, 2019
From: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
To: NOURYON CHEMICALS INTERNATIONAL B.V.
Reel/Frame 050426/0671 →
SECURITY INTEREST Recorded Oct 1, 2018
From: STARFRUIT US MERGER SUB 1 LLC; STARFRUIT US MERGER SUB 2 LLC; AKZO NOBEL SURFACE CHEMISTRY LLC; AKZO NOBEL CHEMICALS B.V.; AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
To: WILMINGTON TRUST (LONDON) LIMITED, AS COLLATERAL AGENT
Reel/Frame 047231/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 13, 2017
From: AKZO NOBEL N.V.
To: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.
Reel/Frame 044427/0759 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 21, 2014
From: SANNE, ERIK; ANDERSSON, RUNE KJELL; NYANDER, JOHAN
To: AKZO NOBEL N.V.
Reel/Frame 033582/0653 →