Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2006-06-12
2009-12-08
Fortuna, José A (Department: 1791)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S164100, C162S166000, C162S168200, C162S175000, C536S056000, C536S123100, C536S123130, C536S112000
Reexamination Certificate
active
07628888
ABSTRACT:
A composition includes at least one hydrophilic polymer containing primary (—NH2) and/or secondary (—NHR) amine groups and at least one saccharide containing a reducible function. A method of increasing the strength of paper includes the step of contacting the paper with a composition comprising (i) at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function. A hydrogel composition is formed from a mixture of at least one hydrophilic polymer containing at least two groups which are independently the same or different a primary amine group or a secondary amine group and at least one saccharide containing a reducible function.
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Beckman Eric J.
Carroll W. Eamon
Chapman Toby
Goddard Richard J.
Minnich Kristen E.
Bartony & Hare, LLP
Fortuna José A
University of Pittsburgh—Of the Commonwealth System of Hi
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