Claims
- 1. A method of dispersing particulate materials in an aqueous medium, which comprises introducing into the medium an amount effective to disperse said materials of a polymer blend consisting essentially of about 50 to 90% by weight of (A) a polyacrylic acid terminated by thioglycolic, bisulfite, or mercapto groups and about 50 to 1% by weight of (B) a water-soluble, dissociating low molecular weight polymer selected from the group consisting of (1) vinyl aromatic polymers and (2) polymers of 2-acrylamido-2-methylpropane sulfonic acid.
- 2. The method of claim 1 wherein the vinyl aromatic polymers (1) are selected from the group consisting of hydrolyzable styrene/maleic anhydride copolymer, hydrolyzable sulfonated styrene/maleic anhydride copolymer, hydrolyzable styrene/maleimide copolymer, hydrolyzable sulfonated styrene/maleimide copolymer, sulfonated polystyrene, and copolymers of sulfonated styrene and divinyl benezene, and polymers (2) are selected from the group consisting of homopolymers of 2-acrylamido-2-methylpropane sulfonic acid and copolymers of 2 acrylamido-2-methylpropane sulfonic acid and at least one water soluble comonomer.
- 3. The method of claim 1 wherein the amount of polymer (A) is about 70 to 95% by weight and the amount of polymer (B) is about 30 to 5% by weight.
- 4. The method of claim 1 wherein polymer (B) is a hydrolyzable polymer of sulfonated styrene and maleic anhydride.
- 5. The method of claim 4 wherein the amount of polymer (A) is about 70 to 95% by weight and the amount of polymer (B) is about 30 to 5% by weight.
- 6. The method of claim 1 wherein the number average molecular weight of polymers (A) and (B) is about 500 to 5000.
RELATED APPLICATION
This application is a continuation-in-part of application Ser. No. 749,616 filed June 27, 1985, abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4374733 |
Snyder et al. |
Feb 1983 |
|
4384979 |
Hansen |
May 1983 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
749616 |
Jun 1985 |
|