Claims
- 1. A method of preparing a water soluble cationic acrylamide polymer having more uniform cationic quaternary amine functional unit distribution which comprise acidifying a co-monomer of the formula
- CH.sub.2 =RC--CONH.sub.2 (a)
- wherein R is H or CH.sub.3 with an acid containing carboxylate groups having a pKa greater than 1 to provide a pH in the range of between about 2.0 and 4.5 and polymerizing said monomer (a) with a monomer having quaternary amine units and having the formula
- CH.sub.2 =CHR,COOCH.sub.2 CH.sub.2 N(CH.sub.3).sub.3 +R.sub.2.sup.- (b)
- where R.sub.1 is H or CH.sub.3 and R.sub.2 is Cl.sup.- or CH.sub.3 OSO.sub.3 -- and polymerizing the mixture of (a) and (b) to substantial completion.
- 2. The method of claim 1 wherein the co-monomer mixture contains also a different ethylenically unsaturated monomer.
- 3. The process of claim 1, where the acid is dicarboxylic acid.
- 4. The process of claim 3, where the acid is adipic acid.
- 5. The process of claim 1, where the acid is succinic acid.
- 6. The process of claim 1, where the pH is adjusted to below 4.
- 7. The process of claim 1, where the pH is adjusted to between 3 and 4.
- 8. The process of claim 1, where the acid is adipic acid and the pH is between 3 and 4.
- 9. The process of claim 1 where the acid is succinic acid and the pH is between 3 and 4.
- 10. The process of claim 1 wherein the polymerization is effected by emulsion polymerization.
DESCRIPTION
This application is a continuation-in-part of our application Ser. No. 653,253 filed Sept. 24, 1984, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3344100 |
Donat et al. |
Sep 1967 |
|
3929751 |
Gershberg |
Dec 1975 |
|
4024040 |
Phalangas et al. |
May 1977 |
|
4195147 |
Sekmakas et al. |
Mar 1980 |
|
Non-Patent Literature Citations (2)
Entry |
Chemical Abstract No. 91:124645n. |
Chemical Abstract No. 90:187925d. |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
653253 |
Sep 1984 |
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