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Paper Strengthening by Starch Xanthate‐Alkyl Diepoxide Adducts
Author(s) -
Maher G. G.,
Russell C. R.,
Rist C. E.
Publication year - 1974
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19740261107
Subject(s) - xanthate , epoxide , starch , chemistry , alkyl , suspension (topology) , fiber , chemical engineering , polymer chemistry , organic chemistry , catalysis , mathematics , homotopy , pure mathematics , engineering
The reaction between starch xanthate and alkyl diepoxide formed gels in concentrated solution (6–8%) or turbid suspensions in dilute solution (0.1–1,0%); the gelling varied with the nature of the epoxide. The gel or suspension was dispersed and added to wood pulp suspension and therefrom paper products of improved strength characteristics were formed. Also the reaction was conducted in the presence of paper furnish. Handsheets made from furnish containing a 2.5% additive level based on fiber content had burst, folding endurance, and wet and dry breaking length values 1.6, 4.6, 4.2 and 1.4 times, respectively, those of control papers. Improvement in properties was somewhat independent of the xanthate's degree of substitution but dependent on the reaction time (either separate from or in presence of fiber) and the order of addition of epoxide and xanthate.