Granted Patent B2

US 7,615,135 · App. 11/301,804 · Granted Nov 10, 2009

Abstract

Claims (31)

1. A cellulosic fiber composition comprising:

cellulose fiber and a water-compatible polymer comprising a polymer segment formed from at least one ethylenically unsaturated monomer (A) substituted with at least one aryl group and at least one —S(═O) 2 OR 1 or —OS(═O) 2 (O) p R 1 moiety, wherein p is 0 or 1, R 1 is, independently at each occurrence, H, alkyl, aryl, or a cation, and the polymer has a weight average molecular weight of greater than 5 million.

2. The cellulosic fiber composition of claim 1 , wherein the monomer A is selected from the group consisting of the free acid or salt of: styrenesulfonic acid, vinyltoluenesulfonic acid, α-methyl styrenesulfonic acid, anetholesulfonic acid, vinyl phenyl sulfuric acid, 4-sulfonate N-benzyl acrylamide, 4-sulfonate N-phenyl acrylamide, vinylpyrenesulfonic acid, vinylanthracenesulfonic acid, vinylpyridiniopropane sulfonate, and mixtures thereof.

3. The cellulosic fiber composition of claim 1 , wherein die monomer A comprises a free acid or salt of styrenesulfonic acid.

4. The cellulosic fiber composition of claim 1 , wherein the monomer A has Formula I:

wherein:

R 1 is Na + , K + , Li + , NH 4 + or R 5 NH 3 + ; and

R 3 , R 4 , and R 5 are, independently, H or alkyl, and

the —SO 3 R 1 group is in the ortho, meta or pan position.

5. The cellulosic fiber composition of claim 1 , wherein the monomer A has Formula IA or IB:

wherein:

R 1 is a cation

R 3 , R 4 , and R 5 are, independently, H or alkyl; and

Ar is aryl.

6. The cellulosic fiber composition of claim 1 , further comprising a polymer segment formed from at least one ethylenically unsaturated anionic or nonionic monomer (B).

7. The cellulosic fiber composition of claim 3 , further comprising a polymer segment formed from at least one ethylenically unsaturated anionic or nonionic monomer (B).

8. The cellulosic fiber composition of claim 6 , wherein the monomer B is selected from the group consisting of, acrylamide, methacrylamide, N-alkylacrylamide, N-methylacrylamide, N,N-dialkyl acrylamide, N,N-dimethylacrylamide, acrylonitrile, N-vinyl methylacetamide, N-vinyl formamide, N-vinyl methyl formamide, N-vinyl pyrrolidone, styrene, butadiene, vinyl acetate, methyl acrylate, methyl methacrylate, alkyl acrylate, alkyl methacrylate, alkyl acrylamide, alkyl methacrylamide, alkoxylated acrylate, methacrylate, alkyl polyethyleneglycol acrylate, alkyl polyethyleneglycol methacrylate, the free acid or salt of: (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid, acrylamidoglycolic acid, and mixtures thereof.

9. The cellulosic fiber composition of claim 6 , wherein the monomer B is acrylamide.

10. The cellulosic fiber composition of claim 6 , wherein the monomer B is a salt of acrylic acid.

11. The cellulosic fiber composition of claim 9 , wherein the monomer A comprises a sodium or ammonium salt of styrenesulfonic acid.

12. The cellulosic fiber composition of claim 10 , wherein the monomer A comprises a sodium or ammonium salt of styrenesulfonic acid.

13. The cellulosic fiber composition of claim 6 , wherein the molar ratio of A:B is from about 5:95 to about 100:0.

14. The cellulosic fiber composition of claim 6 , wherein the molar ratio of A:B is from about 20:80 to about 100:0.

15. The cellulosic fiber composition of claim 6 , wherein the molar ratio of A:B is from about 30:70 to about 100:0.

16. The cellulosic fiber composition of claim 1 , wherein the cellulose fiber comprises a pulp slurry.

17. The cellulosic fiber composition of claim 1 , wherein the cellulose fiber comprises paper or paperboard.

18. The cellulosic fiber composition of claim 1 , further comprising a least one of inorganic mineral extenders, pigments, sizing agents, starches, deposit control agents, fillers, opacifying agents, optical brighteners, strength agents, organic or inorganic coagulants, and conventional flocculants.

19. A method for preparing a cellulosic fiber composition, comprising:

adding to an aqueous cellulosic fiber slimy an anionic water-compatible polymer comprising a polymer segment formed from at least one ethylenically unsaturated monomer (A) substituted with at least one atyl group and at least one —S(═O) 2 OR 1 or —OS(═O) 2 (O) p R 1 moiety, wherein p is 0 or 1, R 1 is, independently at each occurrence, H, alkyl, aryl, or a cation, and the polymer has a weight average molecular weight of greater than 5 million.

20. A method for improving drainage and retention of solids in a cellulosic fiber composition, comprising:

adding to the cellulosic fiber composition an anionic water-compatible polymer comprising a polymer segment formed from at least one ethylenically unsaturated monomer (A) substituted with at least one aryl group and at least one —S(═O) 2 OR 1 or —OS(═O) 2 (O) p R 1 moiety, wherein p is 0 or 1, R 1 is, independently at each occurrence, H, alkyl, aryl, or a cation, and the polymer has a weight average molecular weight of greater than 5 million.

Assignments (28)