摘要:
The present invention relates to a process for recycling cyclopentadienyl derivatives of the formulae (I) and (I′), a process for preparing metallocenes of the formula (III) from cyclopentadienyl derivatives of the formulae (I) and (I′) or from bridged biscyclopentadienyl derivatives of the formula (II), in which the cyclopentadienyl derivatives of the formulae (I), (I′) or (II) which are used have been at least partly recovered and purified by means of liquid-solid chromatography, and the use of liquid-solid chromatography for purifying substituted, recovered cyclopentadienyl derivatives of the formulae (I), (I′) or (II).
摘要:
The present invention relates to a process for recycling cyclopentadienyl derivatives of the formulae (I) and (I′), a process for preparing metallocenes of the formula (III) from cyclopentadienyl derivatives of the formulae (I) and (I′) or from bridged biscyclopentadienyl derivatives of the formula (II), in which the cyclopentadienyl derivatives of the formulae (I), (I′) or (II) which are used have been at least partly recovered and purified by means of liquid-solid chromatography, and the use of liquid-solid chromatography for purifying substituted, recovered cyclopentadienyl derivatives of the formulae (I), (I′) or (II).
摘要:
A process for preparing cyclopentadiene derivatives having formula (I) Wherein R1, R2, R3, R4, R5 and R6 equal to or different from each other, are hydrogen atoms or hydrocarbon groups comprising the steps of reacting a substituted or unsubstituted indanon with a base and then with a substituted or unsubstituted haloaceton and treating the obtained product with the Lawesson's reagent.
摘要:
A support platform for an oil field pumping unit includes a frame supporting the oil field pumping unit, vertical helical piles, and diagonal helical piles. The vertical helical piles are driven into the ground beneath the frame to support the frame and oil field pumping unit. Each diagonal helical pile has an upper end secured to the frame and a lower portion extending diagonally downward from the frame with a helical blade threaded into the ground to restrain horizontal forces exerted by the oil field pumping unit.
摘要:
The present disclosure relates generally to digital watermarking including watermarking conveyed through multiple channels. One claim recites a method to detect digital watermarks carried in different channels of a physical object. The method comprising: receiving first optically captured image data, the first optically captured image data corresponding to a first channel which is detectable with visible lighting; receiving second optically captured image data, the second optically captured image data corresponding to a second channel with is detectable in a first non-visible spectrum; receiving third optically captured image data, the third optically captured image data corresponding to a third channel with is detectable in a second non-visible spectrum; and using a programmed electronic processor, analyzing the first, second and third optically captured image data to detect watermark components embedded therein. Of course, other claims and combinations are provided too.
摘要:
The present disclosure provides apparatus for analyzing emerging security or authentication feature for physical objects (e.g., identification documents, product packaging, banknotes, etc.). One claim recites an apparatus comprising: a light source for illuminating a physical object with first non-visible light, the physical object comprising a first code provided with a first ink or dye and a second code provided with a second ink or dye, the second ink or dye comprising an emission decay time that is relatively longer than an emission decay time of the first ink or dye, the first code and the second code collectively conveying a first feature when illuminated with the first non-visible light, with the second code individually conveying a second feature after emissions attributable to the first code fall to a first level; and an electronic reader programmed for reading at least the second feature after emissions attributable to the first ink or dye fall to the first level and before emissions attributable to the second ink or dye fall to a second level. Other claims and combinations are provided as well.
摘要:
A covert material for printing onto a printing medium is provided, the covert material comprising a covert pigment and a binder encapsulating the covert pigment into a particle, where the binder comprises at least one of cellulose acetate butyrate (CAB), butyral vinyl acetate, acetyl butyrate, and acetate butyrate. Alternatively, the binder comprises at least one of polyester, polyolefin, acetyl butyrate, acetate butyrate, polystyrene copolymer, and polystyrene-polyvinylpyridine. The covert material can comprise additional components, such as ethyl acetate and/or n-propyl acetate. In one embodiment, the covert pigment comprises about 0.5-5% of the covert material. In one embodiment, the binder comprises about 5-30% of the covert material. In one advantageous embodiment, the covert pigment comprises at least 2% of the covert material and the binder comprises about 20-25% of the covert material. The covert material can further comprise at least one of a colorant, a surface additive, and a magnetic particle. The covert material can be part of a toner or ink. In at least some embodiments, the particle can have many different sizes, including sizes greater than 1 micron, greater than 5 microns, and greater than 20 microns. In one embodiment, the covert printing material is constructed and arranged to be printed using a printer having a predetermined resolution, wherein the particle has a size that is substantially the same as the size of a single pixel or dot printed using the predetermined resolution. The covert material can be constructed and arranged to satisfy a predetermined number of the NCITS 322 tests.
摘要:
A composition is provided for adhering a first article to a second article, the composition comprising a thermally active low Tg polymeric resin; and a multifunctional crystalline polymer. The thermally active low Tg polymeric resin can, for example, comprise 50-99% of the composition. The multifunctional crystalline polymer can, for example, comprise 1-50% of the composition. In one embodiment, the multifunctional crystalline polymer comprises 5-20% by weight of the composition. In one embodiment, the multifunctional crystalline polymer has a low molecular weight.
摘要:
The invention relates to identification documents, and in particular to pre-printing processing covert images, such as UV or IR images, provided on such identification documents. In one implementation, the invention provides a method of processing a digital image that is to be printed on a surface of an identification document as a fluorescing-capable image to improve the quality of the image. Edges or boundaries are detected within the image, the detected edges or boundaries forming an intermediate image. The edges or boundaries within the image are emphasized, and the emphasized image is used for printing the covert image. In some implementations of the invention, a digital watermark is embedded in the covert image.
摘要:
A composition is provided for adhering a first article to a second article, the composition comprising a thermally active low Tg polymeric resin; and a multifunctional crystalline polymer. The thermally active low Tg polymeric resin can, for example, comprise 50-99% of the composition. The multifunctional crystalline polymer can, for example, comprise 1-50% of the composition. In one embodiment, the multifunctional crystalline polymer comprises 5-20% by weight of the composition. In one embodiment, the multifunctional crystalline polymer has a low molecular weight.