125 results about "Nitroxyl" patented technology

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.

Organic polymeric substrates, for example polyolefins such as polypropylene, can be made flame retardant by the incorporation of a synergistic mixture of (i.) a sterically hindered amine of the nitroxyl, hydroxylamine, alkoxyamine or hydroxyalkoxyamine class, and (ii.) a fluorinated polyolefin. Advantageously, a further flame retardant may be added, without the need of adding an antimony synergist. The compositions of the invention combine good flame retardant properties with light stability and good mechanical properties.

The invention relates to N-hydroxylsulfonamide derivatives that donate nitroxyl (HNO) under physiological conditions and are useful in treating and/or preventing the onset and/or development of diseases or conditions that are responsive to nitroxyl therapy, including heart failure and ischemia/reperfusion injury. Novel N-hydroxylsulfonamide derivatives release NHO at a controlled rate under physiological conditions, and the rate of HNO release is modulated by varying the nature and location of functional groups on the N-hydroxylsulfonamide derivatives.

The invention relates to a method for preparing a silver-loaded modified bacterial cellulose-based composite functional wet dressing, which comprises the following steps: (1) placing the freeze-dried bacterial cellulose in a nitroxyl/enzyme system solution, adding an oxidizing agent reaction; (2) adding diamine substances to the solution, heating and reacting; (3) then soaking in silver nitrate solution to obtain bacterial cellulose containing selectively loaded silver ions; Obtain bacterial cellulose selectively loaded with nano-silver particles; (4) finally add the compound solution, take it out after standing at room temperature, and after partial drying, packaging, and sterilization, the silver-loaded modified bacterial cellulose-based compound type can be obtained Functional wet dressing. In the method of the invention, the antibacterial nano-silver can be loaded on the C6 hydroxyl group of the bacterial cellulose, and the functional medicine can be compounded. The prepared dressing can treat various skin injuries, wounds, burns and scalds, etc., and has good antibacterial and repairing effects.

The invention relates to a method for loading antibacterial nanometer silver by the selectivity of bacteria cellulose, and especially relates to a method for oxidizing a bacteria cellulose C6 site primary hydroxyl to carboxylic acid, aminating and loading the antibacterial nanometer silver. The method comprises the following steps: (1) placing bacteria cellulose which is frozen and dried into a nitroxyl/enzyme system solution, adding an oxidizing agent to react; (2) placing into a diamines substance solution to heat for reacting; (3) then dipping in a silver nitrate solution, generating a chelation by silver ions and amino to obtain the bacteria cellulose containing silver ions loaded by selectivity; or high pressure reducing the bacteria cellulose containing silver ions loaded by selectivity to obtain the bacteria cellulose which selectively loads nanometer silver particles. The method for loading antibacterial nanometer silver by the selectivity of bacteria cellulose is capable of loading the antibacterial nanometer silver on the bacteria cellulose C6 site hydroxyl, so that the combination of the silver ions or nanometer silver particles and bacteria cellulose is firm and difficult to shed.

The invention relates to electric conduction polymer and a synthesis method thereof and an electroactive electrode with a surface covered with the electric conduction polymer. In the synthesis method for the electric conduction polymer, polybasic acid is used as a doping agent and a cross-linking agent, so that a monomer is polymerized to obtain electric conduction polymer hydrogel, wherein the monomer is at least one of pyrrole or a derivative of the pyrrole, thiophene or a derivative of the thiophene, phenylamine or a derivative of the phenylamine; and the acid group of the polybasic acid comprises a phosphate group or polybasic acid of which each molecule comprises more than two acid groups selected from at least one of a sulfonic acid group, nitroxyl or a carboxylic acid group and which has the molecular weight of less than or equal to 800. The molar ratio of the mole number of the acid group contained in the polybasic acid to the mole number of an electric conduction polymer monomer is preferably 1:12-12:1. The electric conduction polymer obtained by the synthesis method is covered by the surface of the electroactive electrode. The electric conduction polymer has a simple preparation method, and other impurities are not required to be led into the electric conduction polymer. The prepared electric conduction polymer hydrogel has high ionic conductivity, super hydrophilicity and high biological compatibility.

Disclosed are systems for the electrocatalytic reduction of oxygen, having redox mediator/redox catalyst pairs and an electrolyte solution in contact with an electrode. The redox mediator is included in the electrolyte solution, and the redox catalyst may be included in the electrolyte solution, or alternatively, may be in contact with the electrolyte solution. In one form a cobalt redox catalyst is used with a quinone redox mediator. In another form a nitrogen oxide redox catalyst is used with a nitroxyl type redox mediator. The systems can be used in electrochemical cells wherein neither the anode nor the cathode comprise an expensive metal such as platinum.

The invention relates to a selective amination method of bacterial cellulose and in particular relates to a bacterial cellulose selective amination method, which is to oxidize primary hydroxyl on C6 of anhydroglucose ring of the bacterial cellulose into carboxylic acid under an acidic condition by adopting a nitroxyl/enzyme co-oxidant system, and performing amination. The method comprises the following steps: (1) placing the lyophilized bacterial cellulose into the nitroxyl/enzyme system solution, regulating the pH to be acidic, slowly adding an oxidant, regulating the pH to be neutral, and cleaning to obtain selectively oxidized bacterial cellulose; and (2) placing the selectively oxidized bacterial cellulose into a diamine substance solution, heating to react for 2 to 4 hours, and washing to obtain the selectively aminated bacterial cellulose. According to the selective amination method of bacterial cellulose, the primary hydroxyl on C6 of the anhydroglucose ring of the bacterial cellulose can be selectively converted into amidogen completely and effectively, and can provide a chelation group to bacterial cellulose supported functional particles.

When a nitroxyl compound is heated in an oxygen-free atmosphere with a vinyl aromatic monomer at 50-140 DEG C. for up to 60 days, it forms an activated inhibitor mixture which is superior to the nitroxyl compound itself in preventing the premature polymerization of a vinyl aromatic monomer during its processing and purification.

A method for inhibiting the premature polymerization and the polymer growth of ethylenically unsaturated monomers is disclosed wherein the method comprises adding to said monomers an effective amount of at least one hydrogen donor or electron acceptor. In a preferred embodiment, the hydrogen donor or electron acceptor is used in combination with a stable nitroxyl free radical.

The invention discloses a method for preparing beta-cyclodextrin-gold nano-particles and a method for detecting cholesterol. The method for preparing the beta-cyclodextrin-gold nano-particles includes enabling water, gold source solution and beta-cyclodextrin solution to carry out contact reaction in the presence of buffer solution to obtain the beta-cyclodextrin-gold nano-particles. The gold source solution can be one or a plurality of types of chloroauric acid trihydrate solution, chloroaurate solution, tetra-nitroxyl alloy acid solution and tetra-nitroxyl alloy salt solution. The methods have the advantages that the beta-cyclodextrin-gold nano-particles can be prepared at one step, raw materials of the beta-cyclodextrin-gold nano-particles are easily available, and post-treatment is simple; the cholesterol can be sensitively and quantitatively detected by the aid of the beta-cyclodextrin-gold nano-particles, and the beta-cyclodextrin-gold nano-particles are excellent in anti-interference capacity.

The invention discloses an anti-heparin interference leucine aminopeptidase measuring reagent, which consists of a reagent 1 and a reagent 2, wherein the reagent 1 and the reagent 2 comprises the following components in the concentration ranges: the reagent 1 comprises 50-500 mmol/L of buffer solution (pH (Potential of Hydrogen) of 3.0-6.0), 1-100 ml/L of anti-interference agent and 0.1-100 g/L of preservative; and the reagent 2 comprises 50-500 mmol/L of buffer solution (pH (Potential of Hydrogen) of 3.0-6.0), 1-100 ml/L of L-leucine-p-nitroxyl aniline, 1-100 g/L of stabilizer and 0.1-100 g/L of preservative. The anti-heparin interference leucine aminopeptidase measuring reagent has the advantages of good anti-heparin interference capacity, good stability and capability of completely meeting requirements of clinical inspection.

Novel flame retarding compounds that comprise at least one sterically hindered nitroxyl, hydroxylamine or hydrocarbyloxyamine moiety and at least one conventional organohalogen or organophosphorus flame retardant moiety, represented by

• • where
  • HA is independently of each other a sterically hindered nitroxyl, sterically hindered hydroxylamine or sterically hindered hydrocarbyloxyamine moiety,
  • L is independently of each other a direct bond or chemical linking group,
  • FRM is independently of each other an organohalogen or an organophosphorus flame reatardant moiety, and
  • x, y and z are each independently greater than or equal to 1,

are especially effective towards providing flame retardancy to organic polymer substrates.

A method for inhibiting the premature polymerization and the polymer growth of ethylenically unsaturated monomers is disclosed wherein the method comprises adding to said monomers an effective amount of at least one hydrogen donor or electron acceptor. In a preferred embodiment, the hydrogen donor or electron acceptor is used in combination with a stable nitroxyl free radical.

The invention relates to a high-temperature compound polymerization inhibitor used in a rectification process of an aromatic alkene monomer and an application thereof. The compound polymerization inhibitor includes a component A, a component B and a component C, wherein the component A is a piperidine nitroxyl free radical compound, the component B is an alkoxyphenol compound, and the component C is solvent oil. The polymerization inhibitor has polymerization inhibition effect at high temperature and also has anti-scaling effect, thus solving the problems that polymerization inhibition is achieved only if a polymerization retarder is compounded with a real polymerization inhibitor, and the compound is complex in ingredient, has poor polymerization inhibition effect at high temperature and has no anti-scaling effect. The compound polymerization inhibitor has low toxicity, has good polymerization inhibition effect at high temperature and has the anti-scaling effect, thereby increasing rectification yield of aromatic alkene, reducing pollution and eliminating safety risk.

Disclosed are compositions, which are stabilized against degradation and yellowing during exposure to ultraviolet light by the presence of certain nitroxyl, hydroxyl amine and hydroxyl amine salt additives, a method of stabilizing the compositions by the addition of said additives, to the use of such compositions as media in electroactive devices such as electrochromic and electrophoteric devices, and the electroactive devices comprised of these media.

The present invention provides a photosensitive resin composition for a permanent mask resist, the resin composition containing (A) an acid-modified vinyl group-containing epoxy resin, (B) a photopolymerization initiator and (C) a nitroxyl compound. The nitroxyl compound (C) contains a compound having a specific structure.