55 results about "Zinc cation" patented technology

A system is disclosed for hydrogen generation based on hydrolysis of solid chemical hydrides with the capability of controlled startup and stop characteristics wherein regulation of acid concentration, acid feed rate, or a combination of both control the rate of hydrogen generation. The system comprises a first chamber for storing a solid chemical hydride and a second chamber for storing an acidic reagent. The solid chemical hydride is a solid metal borohydride having the general formula MBH4, where M is selected from the group consisting of alkali metal cations, alkaline earth metal cations, aluminum cation, zinc cation, and ammonium cation. The acidic reagent may comprise inorganic acids such as the mineral acids hydrochloric acid, sulfuric acid, and phosphoric acid, and organic acids such as acetic acid, formic acid, maleic acid, citric acid, and tartaric acid, or mixtures thereof.

The present invention provides a comprehensive solution to skin problems of infants and incontinent adults related to diaper rash, also known as diaper dermatitis. This is based on certain novel divalent metal and quaternary ammonium complexes (ion-pairs) of zeolites (that are made by an in-situ process), which in synergistic combination with certain other compositions, provide a comprehensive treatment for diaper rash that encompasses the following aspects: (1) deactivation of lipase and protease enzymes on skin surface, (2) the controlled-release delivery of skin protectant compositions, such as divalent metal zinc cation, (3) trapping of acidic and alkaline chemicals deposited on skin from body exudates and enzyme activity, (4) controlled-release delivery of anti-inflammatory agents, and COX and LOX enzyme inhibitors, (5) controlled-release delivery of antibacterial and antifungal compositions, and (6) absorption of excess moisture in the diaper zone.

Disclosed is a composition comprising polyamide comprising nylon-6 and optionally nylon-6,66, nylon-66, nylon-610, nylon-612, nylon-11, nylon-12 and an ionomer comprising an ethylene carboxylic acid copolymer, wherein 30 to 90% of the total carboxylic acid functionalities are neutralized to salts with a mixture of zinc cations and cations of a second metal selected from Group 1 of the Periodic Table of the Elements wherein the salts comprise from 20 to 90% equivalents of zinc. Articles prepared from the composition have improved salt stress crack resistance when exposed to zinc chloride solutions.

Drug delivery systems for delivering agents capable of reducing the quantity of residual antibiotics reaching the colon following oral or parenteral antibiotic therapy, and for delivering metallo-dependent enzymes, and methods of using the drug delivery systems, are disclosed. The drug delivery systems include pectin beads that encapsulate the active agent (which can be a metallo-dependent enzyme), where the pectin is crosslinked with zinc or any divalent cation of interest and the pectin beads are coated with Eudragit®-type polymers. The drug delivery systems are orally administrable, but can deliver the active agents to the colon. In some embodiments, they can administer the agents to various positions in the gastro-intestinal tract, including the colon. One metallo-dependent enzyme is the β-lactamase L1 from Stenotrophomonas maltophilia, and agents that inactivate macrolide, quinolone, fluoroquinolone or glycopeptide antibiotics can also be used. The delivery of the active agent can be modulated to occur at various pre-selected sites of delivery within the intestinal tract by gelling / crosslinking a mixture of the active agent, such as a metallo-dependent enzyme, and pectin, with divalent metallic cations such as Ca+2 or Zn+2. A stable metallo-dependent enzyme formulation can be delivered to the lower intestine or colon. The use of zinc cations to crosslink the pectin is particularly preferred when specific metallo-dependent enzymes, which are Zn2+ dependent, could interact with other cationic species if they were used to gel the pectin beads and thus adversely affect the activity of such metallo-dependent enzymes.

A sodium / zinc mixed ionomer comprises carboxylate groups and a combination of counterions that consists essentially of sodium cations and zinc cations. The sodium / zinc mixed ionomer is the neutralization product of a precursor acid copolymer. The precursor acid copolymer comprises copolymerized units of an α-olefin and an α,β-ethylenically unsaturated carboxylic acid, and it has a melt flow rate of about 10 to about 4000 g / 10 min. In addition, the precursor acid copolymer, when neutralized to a level of about 40% to about 90%, and when comprising counterions that consist essentially of sodium ions, produces a sodium ionomer that has a freeze enthalpy that is not detectable or that is less than about 3.0 j / g, when determined by differential scanning calorimetry. Further provided are articles comprising or prepared from the sodium / zinc mixed ionomer.

Electrolysis using a suitable electrolyte provides a completely nonsludging zinc phosphate conversion coating process that produces a high quality conversion coating in a very short time. The suitable electrolyte contains at least water, dissolved nitric acid, and dissolved zinc cations and optionally also contains m chemically distinct species of cations other than zinc and n chemically distinct species of anions other than anions derivable by ionization of phosphoric and nitric acids, each of m and n independently being zero or a positive integer. Preferably, the liquid composition contains as additive at least one selection from nitrous acid, permanganic acid, peroxysulfuric acid, hydrogen peroxide, chloric acid, perchloric acid, nitrobenzenesulfonic acid, hydroxylamine, starch / phosphoric acid esters, fluorine compounds, and salts of the preceding; and / or the metal substrate is subjected to cathodic electrolysis after the workpiece has been brought into contact with a weakly basic aqueous colloidal solution that contains titanium oxide, titanium hydroxide, and zinc phosphate.

Provided is a composition comprising a mixture of a high molecular weight (Mw between 80,000 and 500,000 Da) carboxylate functionalized ethylene terpolymer, a high molecular weight (Mw between 80,000 and 500,000 Da) carboxylate functionalized ethylene dipolymer and a low molecular weight (Mw between 2,000 and 30,000 Da) carboxylate functionalized ethylene copolymer wherein the carboxylic acid groups are at least partially neutralized to form salts containing zinc cations. The composition provides a good balance of hardness, flexural modulus and scuff resistance. The composition is used in films, multilayer structures and other articles of manufacture, such as golf balls.

An aqueous, acidic zincating composition comprising: zinc cations; fluoride anions; and a carboxylic acid having at least one additional —OH substituent is provided that is useful in a process of making a corrosion resistant article comprising contacting an article having an aluminum surface with the zincating composition and thereafter coating the article with an autodeposition coating.