Claims
- 1. A process for controlling pitch in papermaking comprising the step of incorporating in a pitch-containing paper pulp slurry about 0.01 to 0.05% by weight based on pulp solids of a water-soluble, linear cationic polymer comprised of units of the formula: ##STR3## wherein A is a (C.sub.2 -C.sub.3) alkylene group,
- R is H or CH.sub.3 ;
- R.sup.1 is a hydroxyethyl or hydroxypropyl group,
- R.sup.2 is a (C.sub.1 -C.sub.4) alkyl group,
- R.sup.3 is a (C.sub.1 -C.sub.4) alkyl group, and
- X is an anion;
- said polymer having a viscosity average molecular weight of about 35,000 to 70,000.
- 2. The process of claim 1 wherein the polymer has a viscosity average molecular weight of about 40,000 to 60,000.
- 3. The process of claim 1 wherein said polymer is also comprised of units derived from one or more other ethylenically unsaturated monomers.
- 4. The process of claim 1 in which the anion is selected from the group consisting of acetate, nitrate, formate, lactate, citrate, propionate, glycolate, sulfate, oxalate and halide.
- 5. The process of claim 4 in which the anion is acetate, nitrate, sulfate or halide.
- 6. The process of claim 4 in which a cationic additive, in addition to the water soluble linear cationic polymer of the given formula, is added to the paper pulp slurry.
Parent Case Info
This is a continuation, of application Ser. No. 710,823 filed Aug. 2, 1976, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
2838397 |
Gruntfest et al. |
Jun 1958 |
|
3081219 |
Drennen et al. |
Mar 1963 |
|
3617372 |
McNamee et al. |
Nov 1971 |
|
3804668 |
Bakule et al. |
Apr 1974 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
710823 |
Aug 1976 |
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