Ammonia-based, imide-containing resin cuts of styrene-maleic resins

Patent metadata

Field	Value
Publication number	US-10717857-B2
Application number	US-201615777150-A
Country	US
Kind code	B2
Filing date	Nov 14, 2016
Priority date	Nov 19, 2015
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

A process of preparing an aqueous solution of a cycloimide-containing polymer includes heating an aqueous solution of a cycloanhydride-containing polymer with a first neutralizing agent at a ratio of cycloanhydride to neutralizing agent of about 1:1 to about 1:1.5 at a temperature and for a time sufficient to form the aqueous solution of the cycloimide-containing polymer having a cycloimide to acid group ratio of about 1:2 to about 1.5:2.

First claim

What is claimed is:

1. A process of preparing an aqueous solution of a cycloimide-containing polymer, the process comprising:
heating an aqueous solution of a cycloanhydride-containing polymer with a first neutralizing agent at a molar ratio of cycloanhydride to neutralizing agent of about 1:1 to about 1:1.5 at a temperature and for a time sufficient to form the aqueous solution of the cycloimide-containing polymer having an imide to starting anhydride molar ratio of about 1:2 to about 1.5:2.

2. The process of claim 1 , wherein the temperature is about 130° C. to about 155° C.

3. The process of claim 1 , wherein the molar ratio of cycloanhydride to neutralizing agent is about 1:1, and a cycloimide to acid group molar ratio is about 1:2.

4. The process of claim 1 , wherein the cycloanhydride-containing polymer is a styrene-maleic anhydride polymer.

5. The process of claim 1 , wherein the cycloanhydride-containing polymer further comprises acrylate, methacrylate, or diisobutylene repeat units, or a combination of any two or more thereof.

6. The process of claim 1 further comprising adding a second neutralizing agent to the aqueous solution of the cycloimide-containing polymer at a temperature of less than about 90° C. to form a neutralized polymer.

7. The process of claim 1 , wherein the first neutralizing agent is an amine represented by the formula NR 2 R 3 R 4 ,
wherein:
R 2 , R 3 , and R 4 are independently H, C 1-12 alkyl, or C 1-12 aryl.

8. The process of claim 1 , the cycloimide-containing polymer has an number average molecular weight from about 5,000 g/mol to about 15,000 g/mol.

9. The process of claim 1 , wherein the aqueous solution of the cycloimide-containing polymer has a viscosity from about 10 cPs to about 500,000 cPs.

10. The process of claim 1 , wherein the cycloimide-containing polymer is present in the aqueous solution from about 10 wt % to about 35 wt %.

Assignees

• Basf Se

Inventors

• Klots Timothy D
• Sardashti Amirpouyan
• Reinhold Frank

Classifications

• C08L25/08 Primary

  Copolymers of styrene (C08L29/08, C08L35/06, C08L55/02 take precedence) · CPC title

• C08K5/42

  Sulfonic acids; Derivatives thereof · CPC title

• C08F2810/50

  wherein the polymer is a copolymer and the modification is taking place only on one or more of the monomers present in minority · CPC title

• C08F2800/10

  as molar percentages · CPC title

• C08F222/08

  with vinyl aromatic monomers · CPC title