Process To Produce An Acylated Vinylamine-Containing Polymer And Its Application As A Papermaking Additive

• US 20120264888A1
• Filed: 04/13/2012
• Published: 10/18/2012
• Est. Priority Date: 04/14/2011
• Status: Active Grant

• Current Assignee: Solenis Technologies LP (Innovative Water Care, LLC)
• Original Assignee: Hercules Incorporated (Ashland Global Holdings, Inc.)
• Inventors: GU, Qu-Ming, McKay, Jonathan M.
• Granted Patent: US 8,614,279 B2
• Time in Patent Office: Days
• US Class Current: 525/328.4
• CPC Class Codes: C08F 126/02 by a single or double bond to nitrogen
• CPC Class Codes: C08F 2810/30 leading to the formation or introduction of aliphatic or alicyclic unsaturated groups
• CPC Class Codes: C08F 8/10 Acylation
• CPC Class Codes: C08F 8/30 Introducing nitrogen atoms or nitrogen-containing groups
• CPC Class Codes: D21H 17/34 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: D21H 17/54 obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
• CPC Class Codes: D21H 21/02 Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control removal of fats, resins, pitch, or waxes D21C9/08
• CPC Class Codes: D21H 21/10 Retention agents or drainage improvers
• CPC Class Codes: D21H 21/20 Wet strength agents

Abstract

A process for producing an acylated vinylamine-containing polymer is disclosed. The acylated vinylamine-containing polymer is produced by reacting a vinylamine-containing polymer with at least one acylating agent.

Claims

1. A process for producing acylated vinylamine-containing polymer comprising the steps of

a. obtaining an aqueous solution comprising at least one vinylamine-containing polymer, and

b. reacting the vinylamine-containing polymer with at least one acylating agent, wherein the acylating agent is selected from the group consisting of acyl anhydride, acyl halide and mixtures thereof.

2. The process of claim 1 wherein at least one vinylamine-containing polymer is selected from the groups consisting of partially or completely hydrolyzed poly(N-vinylformamide), copolymers of N-vinylformamide and vinylamine, copolymers of vinylamine and amidine, copolymers of N-vinylacetamide and vinylamine, terpolymers of N-vinylformamide, vinylamine and amidine, terpolymers of N-vinylformamide, vinylamine and vinylamine methyl chloride quaternary ammonium salts, terpolymers of N-vinylformamide, vinylamine and vinyl alcohol, terpolymers of N-vinylformamide, vinylamine and vinyl acetate, terpolymers of N-vinylformamide, vinylamine and acrylamide, terpolymers of N-vinylformamide, vinylamine and acrylate, terpolymers of N-vinylformamide, vinylamine, and diallyldimethyl ammonium chloride, terpolymers of N-vinylformamide, vinylamine, and vinyl trimethoxysilane, modified vinylamine-containing polymers, or mixtures thereof.

3. The process of claim 1 wherein the vinylamine-containing polymer comprises partially or completely hydrolyzed poly(N-vinylformamide).

4. The process of claim 1 wherein the acylating agent comprises acyl anhydride.

5. The process of claim 1 wherein the acylating agent comprises acyl halide.

6. The process of claim 1 wherein the acylating agent is selected from the group consisting of acetic anhydride, propionic anhydride, butyric anhydride, heptanoic anhydride, anhydride, benzoic anhydride, phenylacetic anhydride, crotonic anhydride, chloroacetic anhydride, dichloroacetic anhydride and trifloroacetic anhydride, heptanoyl anhydride, an acyl halide and mixtures thereof.

7. The process of claim 1 wherein the acylating agent comprises acetic anhydride.

8. The process of claim 1 wherein the acylating agent is selected from the group consisting of an acyl chloride, acyl bromide, acetyl chloride, propionyl chloride, butyryl chloride, benzoyl chloride, phenylacetyl chloride, crotonyl chloride, chloroacetyl chloride and mixtures thereof.

9. The process of claim 1 wherein the acylated vinylamine-containing polymer has a molecular weight in the range of from about 5,000 to about 2,000,000 Daltons.

10. A process to produce an acylated poly(vinylamine) comprising the steps of:

a. conducting free radical polymerization of N-vinylformamide in aqueous solution,

b. conducting alkaline hydrolysis to form a poly(vinylamine), and

c. reacting the polyvinylamine with an acylating agent,

wherein the acylating agent is selected from the group consisting of acyl anhydride, acyl halide and mixtures thereof.

11. The process of claim 10 wherein the polyvinylamine is selected from the group consisting of partially or completely hydrolyzed poly(N-vinylformamide);

copolymers of N-vinylformamide and vinylamine, copolymers of vinylamine and amidine;

terpolymers of N-vinylformamide, vinylamine and amidine; and

mixtures thereof.

12. The process of claim 10 wherein the acylating agent comprises acetic anhydride

13. The process of claim 10 wherein the acylating agent comprises propionic anhydride.

14. The process of claim 10 wherein the acylating agent comprises acetyl chloride

15. The process of claim 10 wherein the acylating agent comprises propionyl chloride.

16. The process of claim 10 wherein the polyvinylamine and the acylating agent are reacted at a pH of between 7 and 11.

17. The process of claim 10 wherein the polyvinylamine and the acylating agent are reacted at a temperature of between 24-50°

C.

18. The process of claim 10 wherein the polyvinylamine and the acylating agent are reacted for a period of between 0.1 and 4 hours.

19. The process of claim 10 wherein the polyvinylamine and the acylating agent are reacted at a pH of between 7 and 11 and at a temperature of between 24-50°

C.