IP Library › Granted Patent US 8,828,188
Granted Patent B2
US 8,828,188 · App. 13/560,255 · Granted Sep 9, 2014

Filler for paper making process

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Quick Facts
Patent No.
US 8,828,188
App. No.
13/560,255
Granted
Sep 9, 2014
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 (8)

1. A filler composition consisting essentially of water, a clay selected from the group consisting of talc, hydrotalcite, kaolin, calcinated clay, bentonite and mixtures thereof, and an anionic cellulose derivative containing one or more carboxymethyl groups and having a degree of substitution of carboxymethyl groups from about 0.15 up to about 0.40, and said filler composition has a cellulose derivative content from 0.3 to 10% 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 from about 0.15 up to about 0.35.

3. The filler composition according to claim 1 , wherein the filler has a clay content from 60 to about 80% by weight, based on the weight of the solids of the filler.

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

5. A filler composition comprising clay selected from the group consisting of talc, hydrotalcite, kaolin, calcinated clay, bentonite, and mixture thereof; and an anionic cellulose derivative having a degree of substitution of caboxymethyl groups from about 0.15 up to about 0.40, wherein said clay has been modified by said cellulose derivative, and said filler composition has a cellulose derivative content from 0.3 to 10% by weight, based on the weight of the solids of the filler.

6. The filler composition according to claim 5 , wherein the degree of substitution is from about 0.15 up to about 0.35.

7. The filler composition according to claim 5 , wherein the filler has a clay content from 60 to about 80% by weight, based on the weight of the solids of the filler.

8. The filler composition according to claim 5 , wherein the clay is kaolin.

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 4, 2014
From: SANNE, ERIK; ANDERSSON, RUNE KJELL; NYANDER, JOHAN
To: AKZO NOBEL N.V.
Reel/Frame 033455/0219 →