Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2006-08-15
2006-08-15
Fortuna, José A. (Department: 1731)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S158000, C162S164300, C162S164600, C162S168100, C162S168200, C162S166000, C162S175000, C162S178000
Reexamination Certificate
active
07090745
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.
Barton & Hare, LLP
Fortuna Jos'e A.
University of Pittsburgh
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