Claims
- 1. A salt produced by hydrolyzing the polymer produced by a process comprising polymerizing (1) one of the members of the group consisting of maleic acid, malic acid, or fumaric acid and (2) less than one equivalent of ammonia, at a temperature greater than about 120.degree. C., to produce said polymer.
- 2. A salt produced by hydrolyzing the polymer produced by a process comprising polymerizing (1) one of the members of the group consisting of maleic acid, malic acid, or fumaric acid, (2) less than one equivalent of ammonia, and (3) a carboxylic acid, at a temperature greater than about 120.degree. C., to produce said polymer.
Parent Case Info
This application is a division of application Ser. No. 08/132,246, filed Oct. 6, 1993 now U.S. Pat. No. 5,442,038.
US Referenced Citations (5)
Divisions (1)
|
Number |
Date |
Country |
Parent |
132246 |
Oct 1993 |
|