Patent Number: 8,871,922

Title: Cellulose materials with novel properties

Abstract: A molecule possessing a primary or secondary amino group and an additional functionality capable of providing a novel or improved property to a cellulose material has been permanently attached to the cellulose material in aqueous media using a water-soluble carbodiimide as the coupling agent/activator. One such molecule is 5-aminofluorescein (abbreviated as "A-fluo") and one such cellulose material is a papermaking pulp. Papers made from a pulp furnish containing, for example, 0.01 wt. % of the "A-fluo"-attached pulp show an embedded marker feature authenticable upon UV or visible light excitation. The "A-fluo"-attached pulp can also be used for the marking and identification of a pulp furnish.

Inventors: Hu; Thomas Q. (Vancouver, CA), Hayek; Ali (Burnaby, CA)

Assignee: FPInnovations

International Classification: C08B 15/06 (20060101); C08F 251/00 (20060101)

Expiration Date: 2018-10-28 0:00:00