Boronic acid containing polymers for papermaking process

Patent metadata

Field	Value
Publication number	US-11035080-B2
Application number	US-201615767082-A
Country	US
Kind code	B2
Filing date	Dec 14, 2016
Priority date	Dec 14, 2015
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

Papermaking additives that include various polymers and/or micropolymers are disclosed. The micropolymers may have a network structure that can be created by crosslinking or other means. The micropolymer may be an acrylamide based polymer having a boronic acid moiety. The weight average molecular weight of the micropolymer may be greater than 1,000,000.

First claim

What is claimed is:

1. A method of increasing retention, drainage, and formation properties in a papermaking process comprising adding an effective amount of an additive to the papermaking process, wherein the additive comprises an acrylamide containing polymer having a boronic acid moiety,
wherein the polymer comprises from about 0.001 to about 20 mole % of a monomer comprising the boronic acid moiety,
wherein the monomer comprising the boronic acid moiety is selected from the group consisting of 3-(acrylamido)phenylboronic acid, 2-(acrylamido)phenylboronic acid, 4-(acrylamido)phenylboronic acid, 3-(methacrylamido)phenylboronic acid, 2-(methacrylamido)phenylboronic acid, 4-(methacrylamido)phenylboronic acid, and any combination thereof.

2. The method of claim 1 , wherein the polymer is cationic, anionic, amphoteric, zwitterionic, or associative.

3. The method of claim 1 , wherein the polymer additionally comprises a monomer selected from the group consisting of (meth)acrylic acid, salts of (meth)acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid (AMPS), salts of AMPS, 2-(acryloyloxy)-N,N,N-trimethylethanaminium (DMAEA.MCQ), diallyldimethylammonium chloride (DADMAC), and any combination thereof.

4. The method of claim 1 , wherein the additive is added in latex form, as an aqueous solution, or in dry powder form.

5. The method of claim 1 , wherein the additive is added before, after, and/or with an additional chemical selected from the group consisting of a naturally occurring carbohydrate, a flocculant, an organic microparticulate, a copolymer of acrylamide and diallyldimethylammonium chloride, a copolymer of dimethyl aminoethyl (meth)acrylate and acrylamide, a copolymer of (meth)acrylic acid and acrylamide, a copolymer of dimethyl aminoethyl (meth)acrylate and acrylamide, a copolymer of dimethyl aminoethyl (meth)acrylate-methyl chloride quat and acrylamide, a terpolymer of dimethyl aminoethyl (meth)acrylate, acrylamide, and (meth)acrylic acid, a homopolymer of acrylic acid, a copolymer of acrylic acid, a copolymer of methacrylamide 2-acrylamido-2-methylpropane sulfonate and (meth)acrylamide, polyethylene oxide, polyacrylamide, a coagulant, a polyalkylenepolyamine, alum, polyaluminum chloride, polyaluminum silicate sulfate, a brightening agent, a dye, a pigment, a filler, an antimicrobial agent, a defoamer, a pH control agent, and any combination thereof.

6. The method of claim 1 , wherein the additive is added during a pulping stage, a bleaching stage, a stock preparation stage, a wet end stage, or any combination thereof.

7. The method of claim 1 , wherein the additive is added to a stock.

8. The method of claim 1 , wherein the effective amount is from about 0.05 lb/ton of paper to about 10 lb/ton of paper.

9. The method of claim 1 , wherein the additive is added using a member selected from the group consisting of a non-contact applicator, a chemical injection pump, a spray bar, a curtain applicator, a slice blade, and any combination thereof.

10. The method of claim 1 , wherein the polymer further comprises acrylic acid.

11. The method of claim 1 , wherein the additive excludes vinylamine polymers.

12. The method of claim 1 , wherein the polymer has a weight average molecular weight of greater than 1,000,000 Da.

13. The method of claim 1 , wherein the polymer is a micropolymer.

14. The method of claim 1 , wherein the polymer comprises 70 mole % of acrylamide, 30 mole % of acrylic acid, and 0.5 weight % of phenylboronic acid.

15. The method of claim 1 , wherein the polymer has a weight average molecular weight of 1,000,000 Da to 5,000,000 Da.

Assignees

• Ecolab Usa Inc

Inventors

• Zhang Zhiyi
• Wei Mingli
• Mcdonald Kevin
• Cheng Weiguo
• Kurian Pious V

Classifications

• C08F220/56 Primary

  Acrylamide; Methacrylamide · CPC title

• D21H17/375 Primary

  Poly(meth)acrylamide · CPC title

• D21H21/36

  Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents · 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