C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 3/00 (2006.01) C08B 3/06 (2006.01) C08L 1/12 (2006.01) C09B 23/00 (2006.01) C09B 47/00 (2006.01) C09B 67/14 (2006.01) C09B 69/10 (2006.01)
Patent
CA 2340532
A cellulosic ester has associated with the ester at least one near infrared fluorophore. A method for incorporating the near infrared fluorophore into the cellulosic ester is also provided. In the method, the near infrared fluorophore is dissolved in a strong acid and precipitated to form an acid paste. The paste is then added to an activated cellulose, such as a hydrolyzed cellulose acetate, in the presence of at least one acid and acid anhydride. Advantageously, such marked cellulosic materials can be solvent spun into staple fibers which may be further utilized in known materials, webs and articles.
Barlow Fred Dewey Jr.
Boyd Edwin Taylor
Krutak James John Sr.
Mccray Thomas Vernon
Mitchell Melvin Glenn
Isotag Technology Inc.
Marks & Clerk
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