摘要:
An oxygen scavenging composition of a carrier, such as a polymer, which is permeable to both oxygen and water or water vapor and an oxygen scavenging compound of an organic compound or salt thereof dispersed relatively uniformly throughout the polymer in an amount effective to act as an oxygen scavenger. The oxygen scavenging compound is activated for scavenging oxygen by contact with water or water vapor which permeates into or through the carrier. Also, a catalyzing agent is included in an amount sufficient to increase the rate of oxygen scavenging by the organic compound. The organic compound and catalyzing agent are preferably maintained in a dry state by freeze drying or microencapsulation until the organic compound is activated for oxygen scavenging by contact with water or water vapor.
摘要:
An oxygen scavenging composition of a carrier, such as a polymer, which is permeable to both oxygen and water or water vapor and an oxygen scavenging compound of an organic compound or salt thereof dispersed relatively uniformly throughout the polymer in an amount effective to act as an oxygen scavenger. The oxygen scavenging compound is activated for scavenging oxygen by contact with water or water vapor which permeates into or through the carrier. Also, a catalyzing agent is included in an amount sufficient to increase the rate of oxygen scavenging by the organic compound. The organic compound and catalyzing agent are preferably maintained in a dry state by freeze drying or microencapsulation until the organic compound is activated for oxygen scavenging by contact with water or water vapor.
摘要:
An oxygen scavenging composition of a carrier, such as a polymer, which is permeable to both oxygen and water or water vapor and an oxygen scavenging compound of an organic compound or salt thereof dispersed relatively uniformly throughout the polymer in an amount effective to act as an oxygen scavenger. The oxygen scavenging compound is a salicylic acid chelate or complex of a transition metal or a salt thereof. The oxygen scavenging composition is activated for scavenging oxygen by contact with water or water vapor which permeates into or through the carrier. A reducing agent of an ascorbate compound may be added to enhance the performance of the salicylic acid chelate or complex. The oxygen scavenging compound may be added to the composition in a dry state, and is inactive until activated for oxygen scavenging by contact with water or water vapor.
摘要:
An oxygen scavenging composition of a polymer which is permeable to both oxygen and water or water vapor, and an oxygen scavenging material of an amino polycarboxylic acid chelate or complex of a transition metal, or salt thereof, dispersed relatively uniformly throughout the polymer in an amount effective to act as an oxygen scavenger when activated for scavenging oxygen by contact with water or water vapor which permeates the polymer. A preferred oxygen scavenging compound is ferrous EDTA or salts thereof. Also, an ascorbate compound may be used as a preservative or augmenter for the oxygen scavenging compound.
摘要:
An oxygen scavenging packages and containers which comprise a composition of a carrier, such as a polymer, which is permeable to both oxygen and water or water vapor and an oxygen scavenging compound of an organic compound or salt thereof dispersed relatively uniformly throughout the polymer in an amount effective to act as an oxygen scavenger. The oxygen scavenging compound is a salicylic acid chelate or complex of a transition metal or a salt thereof. The oxygen scavenging composition is activated for scavenging oxygen by contact with water or water vapor which permeates into or through the carrier. A reducing agent of an ascorbate compound may be added to enhance the performance of the salicylic acid chelate or complex. The oxygen scavenging compound may be added to the composition in a dry state, and is inactive until activated for oxygen scavenging by contact with water or water vapor.
摘要:
Methods and apparatus for the extraction of a ligand such as molecular oxygen from a first fluid environment and for release of a ligand such as molecular oxygen, as well as ligand carrier compounds therefor comprising linear, pentadentate polyalkylamines and transition metal ions. The carrier compounds have the general formula: ##STR1## where, each of R.sub.1 and R.sub.2 is independently an organic group including a sulfur, an oxygen or a nitrogen coordinated to M;each of m, n, o, and p is 1, 2, 3, or 4;X is selected from the group consisting of 2,6-pyridyl, 2,6-piperidyl, 2,5-pyrrolyl, 2,4-imidazolyl, substituted heterocyclic amines, --)--, --S--, ##STR2## and ##STR3## where R.sub.3 is hydrogen, lower alkyl or aralkyl; and M is a transition metal ion.
摘要:
In accordance with the invention a set of dyes suitable for use in ink-jet inks and method for formulating the same are provided. A specific dye set for formulating the yellow, cyan, magenta, and optionally black inks is disclosed, comprising Direct Yellow 132, Direct Blue 199, Magenta 377, and optionally Pacified Reactive Black 31 dyes, respectively. This dye set provides ink-jet prints able to match printed color standards such as specification for web offset publications (SWOP) and Euroweb, with excellent lightfade and pen reliability performance.
摘要:
Thermal ink-jet inks are provided containing a colorant and a vehicle, the vehicle comprising from about 8 to about 20 wt % of a 1,2-diol, from about 0.1 to about 5 wt % of at least one non-ionic surfactant, and optionally 0 to about 5 wt. % of a aliphatic alcohol; 0 to about 1.5 wt % of at least one component independently selected from the group consisting of buffers, biocides, and metal chelators; and the balance water. The inks formulated according to the present invention provide the desired dot gain and dot symmetry on the print medium, in particular, gelatin coated media, while providing excellent color-to-color bleed alleviation. The images generated with the inks of the present invention exhibit excellent, near photographic image quality.
摘要:
Magenta chromophore dyes which are stabilized by adding steric hindering groups to protect the imino carbons; nonlimiting examples of the steric hindering groups being phenyl, methyl, ethyl, isopropyl, fluoride, chloride, bromide and iodide groups.
摘要:
The present invention is drawn to systems and coated substrates for ink-jet ink printing. The coated media substrate can comprise a substrate, having coated thereon, a porous coating, wherein the porous coating comprises silica having crown compounds covalently attached thereto. The system utilizes a coated media substrate wherein the coating is functionalized with crown compounds, and further provides an ink-jet ink composition that has an affinity for the crown compounds.