Papermaking additives and mechanical pulp with primary amino groups
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United States of America Patent
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Sep 24, 2002
Grant Date -
Mar 7, 2002
app pub date -
Jul 2, 2001
filing date -
Jan 6, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A graft polymer comprises a carbohydrate polymer having pendant 3-amino-2-hydroxy propyl groups grafted thereon and may be employed as a retention aid and strengthening additive in paper manufacture. When the carbohydrate polymer is a component of wood pulp the resulting chemically modified wood pulp may be employed in conjunction with unmodified wood pulp to incorporate therein the retention and strengthening characteristics.
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