Cellulose materials with novel properties
US8871922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Aug 3, 2030 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/40
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.