Pitch-controlling agent and pitch-controlling method
AssigneeHarima Chemicals, Inc.
InventorsTakuji Sodeyama, Yoshihiro Aikawa, Takahiro Fujiwara
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Abstract
Disclosed is a pitch control agent including a (meth)acrylamide-based amphoteric polymer. The (meth)acrylamide-based amphoteric polymer contains 50 mol % or more of (meth)acrylamide, 0.5 to 20 mol % of a diallyldialkylammonium salt; and 0.1 to 14 mol % of an anionic monomer, as copolymerizable monomer components. This pitch control agent is less likely to be affected by a change in a surrounding environment, and therefore can exhibit excellent pitch controllability under various environments in paper production process.
Claims9
A pitch control agent comprising a (meth)acrylamide-based amphoteric polymer, wherein
- the (meth)acrylamide-based amphoteric polymer contains as copolymerizable monomer components:
- 50 mol % or more of (meth)acrylamide;
- 0.5 to 20 mol % of a diallyldialkylammonium salt;
- and 0.1 to 14 mol % of an α,β-unsaturated carboxylic acid or a salt thereof, and
- the α,β-unsaturated carboxylic acid includes itaconic acid, wherein the molar content of diallyldialkylammonium salt in the amphoteric polymer is higher than the molar content of the α,β-unsaturated carboxylic acid or salt thereof in the amphoteric polymer.
Dependencies are inferred from the claim text.