Hydrophobically modified poly(aminoamides)
AssigneeHercules Incorporated
InventorsQu-Ming Gu, Lloyd A. Lobo, Erin A. S. Doherty, Huai N. Cheng
Life of this patent
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Abstract
Disclosed herein are hydrophobically-modified poly(aminoamides) useful as fixative detackifiers for stickies and pitch control in papermaking processes. These polymers are prepared via modification of amine-containing water-soluble poly(aminoamides) with reactive functional group-containing hydrophobic compounds. In particular, poly(aminoamides) may be modified, under appropriate reaction conditions, with long chain alkyl glycidyl ether, AKD (alkyl ketene dimer), ASA (alkyl succinyl anhydride), or Quab (3-chloro-2-hydroxypropyl-N,N,N-dimethylalkyl ammonium chloride). These novel polymers are effective in inhibiting deposition of organic contaminants in pulp and papermaking systems.
Claims11
A water-soluble, cationic polymer comprising randomly distributed units of formula (I):
- wherein X on said unit of formula (I) is a hydrophobic moiety selected from the group consisting of formula (II), (IV), (VI), (VII), and (VIII):
- wherein
- (a) R1 and R2, identically or differently, are a straight chain or branched aliphatic or olefinic or aromatic group having up to 22 carbon atoms and up to 4 double bonds;
- (b) Y is a straight chain or branched aliphatic or olefinic or aromatic group having up to 20 carbon atoms and up to 8 double bonds;
- and
- (c) p is an integer in the range of from 2 to 10 and m is an integer in the range of from 1 to 10.
A water soluble, cationic polymer comprising randomly distributed units of formula (I) and formula (IX):
- wherein
- X on said unit of formula (I) is a hydrophobic moiety selected from the group consisting of formula (II), (IV), (VI), (VII), and (VIII):
- (a) wherein R1 and R2, identically or differently, are a straight chain or branched aliphatic or olefinic or aromatic group having up to 22 carbon atoms and up to 4 double bonds;
- (b) Y is a straight chain or branched aliphatic or olefinic or aromatic group having up to 20;
- carbon atoms and up to 8 double bonds;
- (c) p is an integers in the range of from 2 to 10 and m is an integers in the range of from 1 to 10, and
- wherein n and r, the numbers of randomly distributed units of formula (I) and formula (IX) in the polymer respectively, are integers in the range of from 5 to 10,000;
- and the ratio of r:n is in the range from 1:10 to 1000:1.
Dependencies are inferred from the claim text.