Low molecular weight dry powder polymer for use as paper-making dry strength agent

Patent metadata

Field	Value
Publication number	US-10920065-B2
Application number	US-201715620176-A
Country	US
Kind code	B2
Filing date	Jun 12, 2017
Priority date	Jun 10, 2016
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

The invention provides an associative polymer, a powder, and a process for making a powder comprising, networking one or more associative polymer(s) and one or more optional surfactant(s) to form a wet gel, and forming a powder from the wet gel, wherein the associative polymer(s) have a weight average molecular weight of from about 10 kDa to about 2,000 kDa.

First claim

The invention claimed is:

1. A powder, comprising:
one or more associative polymer(s) comprising one or more associative monomer unit(s) and one or more additional monomer unit(s) selected from at least one of a cationic monomer unit, an anionic monomer unit, a nonionic monomer unit, a zwitterionic monomer unit, or a combination thereof, and one or more surfactant(s),
wherein the one or more associative polymer(s) have a weight average molecular weight of from about 10 kDa to about 2,000 kDa, and
wherein at least one of the one or more associative monomer units is derived from a monomer of Formula II:

wherein R 3 is H or C 1 -C 10 alkyl, X is O or NH, n is an integer from 1 to 100, o is an integer from 0 to 100, m is at least 5, each Y 1 and Y 2 are independently H or C 1 -C 4 alkyl, and R 4 is H or a hydrophobic group.

2. The powder of claim 1 , wherein the additional monomer unit is derived from a monomer selected from a monomer of Formula I:

wherein R 1 is H or C 1 -C 4 alkyl and each R 2 is independently H or an organic group; 2-(dimethylamino)ethyl acrylate (“DMAEA”), 2-(dimethylamino)ethyl methacrylate (“DMAEM”), 3-(dimethylamino)propyl methacrylamide (“DMAPMA”), 3-(dimethylamino)propyl acrylamide (“DMAPA”), 3-methacrylamidopropyl-trimethyl-ammonium chloride (“MAPTAC”), 3-acrylamidopropyl-trimethyl-ammonium chloride (“APTAC”), N-vinyl pyrrolidone (“NVP”), N-vinyl acetamide, hydroxyethyl methacrylate, hydroxyethyl acrylate, diallyldimethylammonium chloride (“DADMAC”), diallylamine, vinylformamide, 2-(acryloyloxy)-N,N,N-trimethylethanaminium chloride (“DMAEA.MCQ”), 2-(methacryloyloxy)-N,N,N-trimethylethanaminium chloride (“DMAEM.MCQ”), N,N-dimethylaminoethyl acrylate benzyl chloride (“DMAEA.BCQ”), N,N-dimethylaminoethyl methacrylate benzyl chloride (“DMAEM.BCQ”), 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”), 2-acrylamido-2-methylbutane sulfonic acid (“AMBS”), [2-methyl-2-[(1-oxo-2-propenyl)amino]propyl]-phosphonic acid, methacrylic acid, acrylic acid; salts thereof, and combinations thereof.

3. The powder of claim 1 , wherein the additional monomer unit is derived from a monomer of Formula I:

wherein R 1 is H or C 1 -C 4 alkyl and each R 2 is independently H or an organic group.

4. The powder of claim 1 , wherein the additional monomer unit is derived from a monomer selected from 2-(dimethylamino)ethyl acrylate (“DMAEA”), 2-(dimethylamino)ethyl methacrylate (“DMAEM”), 3-(dimethylamino)propyl methacrylamide (“DMAPMA”), 3-(dimethylamino)propyl acrylamide (“DMAPA”), 3-methacrylamidopropyl-trimethyl-ammonium chloride (“MAPTAC”), 3-acrylamidopropyl-trimethyl-ammonium chloride (“APTAC”), N-vinyl pyrrolidone (“NVP”), N-vinyl acetamide, hydroxyethyl methacrylate, hydroxyethyl acrylate, diallyldimethylammonium chloride (“DADMAC”), diallylamine, vinylformamide, 2-(acryloyloxy)-N,N,N-trimethylethanaminium chloride (“DMAEA.MCQ”), 2-(methacryloyloxy)-N,N,N-trimethylethanaminium chloride (“DMAEM.MCQ”), N,N-dimethylaminoethyl acrylate benzyl chloride (“DMAEA.BCQ”), N,N-dimethylaminoethyl methacrylate benzyl chloride (“DMAEM.BCQ”), 2-acrylamido-2-methylpropane sulfonic acid (“AMPS”), 2-acrylamido-2-methylbutane sulfonic acid (“AMBS”), [2-methyl-2-[(1-oxo-2-propenyl)amino]propyl]-phosphonic acid, methacrylic acid, acrylic acid; salts thereof; and combinations thereof.

5. The powder of claim 1 , wherein the surfactant is a nonionic surfactant of formula XII

wherein g is an integer ranging from about 12 to about 50; i is 0, R 12 is H, and h is an integer ranging from about 10 to about 100.

6. The powder of claim 1 , wherein the one or more associative polymer(s) comprises a sum total from about 0.005 mol % to about 10 mol % of the one or more associative monomer unit(s).

7. The powder of claim 1 , wherein the one or more associative polymer(s) comprises a sum total from about 90 mol % to about 99.995 mol % of the one or more additional monomer unit(s).

8. The powder of claim 1 , wherein the powder, at a median particle size of at least 300 microns, is completely soluble as up to a 1 wt. % solution in water with stirring by a cage stirrer at 400 rpm within one hour at room temperature.

9. The powder of claim 1 , wherein the powder has an intrinsic viscosity of from about 0.05 dL/g to about 7 dL/g.

10. The powder of claim 1 , wherein the powder has a Huggins constant of from about 0.3 to about 10.

11. The powder of claim 1 , wherein the surfactant is HO(C 2 H 4 O) 101 (C 3 H 6 O) 56 (C 2 H 4 O) 101 H, polyethoxy (25) lauryl alcohol, polyethoxy (25) cetyl alcohol, polyethoxy (25) stearyl alcohol, polyethoxy (25) behenyl alcohol, or any combination thereof.

12. The powder of claim 1 , wherein the powder comprises a sum total of about 0.001 wt. % to about 20 wt. % of the one or more surfactants.

13. The powder of claim 1 , wherein the powder has a moisture content from about 0 wt. % to about 30 wt. %.

Assignees

• Ecolab Usa Inc

Inventors

• Huang Heqing
• Jordan David
• Lowe Robert M
• Cramm Jeffrey
• Cheng Weiguo
• Wei Mingli

Classifications

• C08L55/005 Primary

  Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond · CPC title

• C07D307/04 Primary

  having no double bonds between ring members or between ring members and non-ring members · CPC title

• D21H21/18

  Reinforcing agents · CPC title

• C08G65/002

  from unsaturated compounds (unsaturated oxiranes C08G65/14) · CPC title

• C07C305/04

  being acyclic and saturated · CPC title