| 摘要 |
PCT No. PCT/US97/19251 Sec. 371 Date Jan. 5, 1998 Sec. 102(e) Date Jan. 5, 1998 PCT Filed Oct. 27, 1997 PCT Pub. No. WO98/18871 PCT Pub. Date May 17, 1998An organic solvent based polyester ink formulation having a fluorescing compound therein is suitable for ink jet printing applications. The ink is useful for producing invisible printing/markings on the surface of a variety of materials for identification, authentication, sorting, etc. Suitable printing substrates include porous and non-porous materials such as plastic, film, sheeting, fabric, paper, high gloss paper; metal, foils, plates; rubber; glass; cellophane; wood; and the like. The ink formulation contains at least one organic soluble polyester, having at least one near infrared fluorophore copolymerized therein, dissolved in an organic solvent. Suitable organic solvents include a C3-C6 carbon ketone, a C3-C6 carbon organic ester, a C1-C3 carbon alcohol, or a combination thereof. In a preferred embodiment, the polyester containing the copolymerized near infrared fluorophore is dissolved in a solvent comprising a C3-C6 carbon ketone and a C1-C3 carbon alcohol. |
