Claims
- 1. A water-soluble, powdered, cationic polyelectrolyte comprising a copolymer of acrylamide and dimethylaminopropylacrylamide in which
- a) the dimethylaminopropylacrylamide is neutralized with mineral acids;
- b) the quotient of the intrinsic viscosity of the copolymers divided by the molar ratio of acrylamide to dimethylaminopropylacrylamide is greater than 200; and
- c) the proportion of the cationic monomers in the polymer is between 4 and 80 mol-%,
- the copolymer having been obtained by copolymerization of acrylamide and dimethylaminopropylacrylamide that is essentially free of bifunctional compounds.
Priority Claims (1)
Number |
Date |
Country |
Kind |
35 44 909.8 |
Dec 1985 |
DEX |
|
CROSS-REFERENCES TO RELATED APPLICATIONS
This is a continuation of application Ser. No. 942,475, filed Sep. 9, 1992, now abandoned, which is a continuation of application Ser. No. 631,200, filed Dec. 20, 1990, now abandoned, which is a continuation of application Ser. No. 942,329, filed Dec. 16, 1986, now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (2)
Number |
Date |
Country |
134756 |
Mar 1985 |
EPX |
0134756 |
Mar 1985 |
EPX |
Continuations (3)
|
Number |
Date |
Country |
Parent |
942475 |
Sep 1992 |
|
Parent |
631200 |
Dec 1990 |
|
Parent |
942329 |
Dec 1986 |
|