5492 results about "Tris" patented technology

A method of forming an aluminum containing film on a substrate includes providing a precursor having the chemical structure: Al(NR₁R₂)(NR₃R₄)(NR₅R₆); where each of R₁, R₂, R₃, R₄, R₅ and R₆ is independently selected from the group consisting of hydrogen and an alkyl group including at least two carbon atoms. The precursor is utilized to form a film on the substrate including at least one of aluminum oxide, aluminum nitride and aluminum oxy-nitride. Each of the R₁-R₆ groups can be the same or different and can by straight or branched chain alkyls. An exemplary precursor that has is useful in forming aluminum containing films is tris diethylamino aluminum.

A γ,δ-unsaturated carboxylic acid silyl ester is prepared by reacting an α,β-unsaturated carboxylic acid ester with a hydrosilane or hydrosiloxane in the presence of tris(pentafluorophenyl)borane. γ,δ-Unsaturated carboxylic acid derivatives are readily prepared through fewer steps and in high yields.

A polyurethane based prepolymer is provided and useful in biomedical devices which provides high oxygen permeability and superior physical properties. A hydrogel is produced from a comonomer mixture containing a polysiloxane-containing urethane prepolymer, tris(trimethylsiloxy)-silylpropyl methacrylate and a hydrophilic comonomer. The hydrogel is especially useful for biomedical materials such as contact lenses and implants.

Disclosed are stabilized aliphatic polyester compositions comprising an aliphatic polyester, a HALS, and a tris-aryl-S-triazine UV absorber that show low embrittlement, haze formation, and discoloration during weathering. Also disclosed are aliphatic polyester compositions comprising aliphatic polyester, a hindered amine light stabilizer, a triazine UV absorber, and a phosphite that exhibit low color prior to weathering but retain good clarity, color, and excellent impact strength after exposure to weathering conditions. The aliphatic polyester compositions may be used prepare shaped articles such as, for example, films, sheets, bottles, tubes, profiles, fibers, and molded articles.

Metal silicates or phosphates are deposited on a heated substrate by the reaction of vapors of alkoxysilanols or alkylphosphates along with reactive metal amides, alkyls or alkoxides. For example, vapors of tris-(ter-butoxy)silanol react with vapors of tetrakis(ethylmethylamido)hafnium to deposit hafnium silicate on surfaces heated to 300° C. The product film has a very uniform stoichiometry throughout the reactor. Similarly, vapors of diisopropylphosphate react with vapors of lithium bis(ethyldimethylsilyl)amide to deposit lithium phosphate films on substrates heated to 250° C. supplying the vapors in alternating pulse produces these same compositions with a very uniform distribution of thickness and excellent step coverage.

Electrolyte solutions of soluble bifunctional redox dyes in molten salt solvent may be used to prepare electrooptic devices with enhanced stability toward ultraviolet radiation. The solvents include lithium or quaternary ammonium cations, and perfluorinated sulfonylimide anions selected from trifluoromethylsulfonate (CF₃SO₃⁻), bis(trifluoromethylsulfonyl)imide ((CF₃SO₂)₂N⁻), bis(perfluoroethylsulfonyl)imide ((CF₃CF₂SO₂)₂N⁻) and tris(trifluoromethylsulfonyl)methide ((CF₃SO₂)₃C⁻).

Provided herein are catalysts useful in providing foam products which are produced using an organic poly isocyanate as a starting material. A catalyst according to the present invention includes the tris-(hydroxyethyl)methyl ammonium cation, and optionally potassium cation, in combination with a variety of possible counter anions present to maintain charge balance and for compatibility. A catalyst according to the invention is preferably used in conjunction with one or more conventional tertiary amine catalysts in a foam producing process. The foams may be polyurethane foams, polyisocyanurate foams, flexible foams, or elastomeric foams.

The invention discloses a super-hydrophobic and super-oleophylic oil-water separating mesh membrane and a preparation method thereof. The method comprises the following steps of: (1), cleaning a fabric mesh and drying the cleaned fabric mesh; (2), dissolving dopamine hydrochloride and trihytdroxy methyl-aminomethane to water to acquire a mixed solution, wherein the pH value of the mixed solution is 8.0-12.0; (3), soaking the dried fabric mesh in the mixed solution, and then getting out the soaked fabric mesh for drying; (4), dissolving mercaptan compound and sodium hydroxide in water to acquire mixed turbid liquid; (5), soaking the fabric mesh acquired in the step (3) in the mixed turbid liquid, reacting the mixture to acquire the oil-water separating mesh membrane. The oil-water separating mesh membrane disclosed by the invention has high bearing pressure to water so that oil can quickly pass, a separating effect is good, the speed is high, and the separating effect on normal hexane, petroleum ether, benzene, gasoline, diesel oil, animal and vegetable oil, crude oil and the like is good. The oil-water separating mesh membrane is non-toxic and harmless, environment-friendly, easy to clean and keep, can be reusable, and has good stability.

A biosensor that is highly responsive and capable of rapid and highly sensitive quantification of a specific component contained in a sample is provided. The biosensor of this invention comprises: an electrically insulating base plate; an electrode system comprising a working electrode and a counter electrode disposed on the base plate; and a reagent system comprising an oxidoreductase which catalyzes the oxidation reaction of glucose, gluconolactonase and a buffer. The buffer is selected from the group consisting of phthalic acid and its salts, maleic acid and its salts, succinic acid and its salts, phospholic acid and its salts, acetic acid and its salts, boric acid and its salts, citric acid and its salts, glycine, tris(hydroxymethyl)aminomethane, piperazine-N,N'-bis(2-ethane sulfonic acid) and the like.

Electrolyte solutions for electrochromic devices such as rear view mirrors and displays with low leakage currents are prepared using inexpensive, low conductivity conductors. Preferred electrolytes include bifunctional redox dyes and molten salt solvents with enhanced stability toward ultraviolet radiation. The solvents include lithium or quaternary ammonium cations, and perfluorinated sulfonylimide anions selected from trifluoromethylsulfonate (CF₃SO₃⁻), bis(trifluoromethylsulfonyl)imide ((CF₃SO₂)₂N⁻), bis(perfluoroethylsulfonyl)imide ((CF₃CF₂SO₂)₂N⁻) and tris(trifluoromethylsulfonyl)methide ((CF₃SO₂)₃C⁻). Electroluminescent, electrochromic and photoelectrochromic devices with nanostructured electrodes include ionic liquids with bifunctional redox dyes. Some of the electrolyte solutions color to red when devices employing the solutions are powered, leading to red or neutral electrooptic devices.

A hybrid contact lens includes a substantially rigid center portion and a substantially flexible skirt portion connected to the center portion. The skirt portion is formed using xerogels compatible with diluents comprising at least one selected from polylactic acid, polyglycolic acid, lactide, glycolide, a polyacetal, a cyclic acetal, a polyketal, a cyclic ketal, a polyorthoester, a cyclic orthoester, di-t-butyl-dicarbonate, tris(trimethylsilyl)amine, and 2,2,2-trifluoroacetamide. These diluents are formulated to function as a stand-in for water in the xerogel polymer, allowing the xerogel to form and bond to the rigid center portion in its fully expanded state. Upon hydration of the hybrid lens, substantially little dimensional change, and thus substantially little distortion, is obtained in the skirt portion. The diluents of the present invention further preserve the mechanical integrity of the xerogel, allowing the xerogel to be machined to final shape, improving the dimensional tolerances which can be achieved in the hybrid lens.

The present invention provides methods, compositions, and kits for the storage and stabilization of biological molecules. The methods comprise applying Tris(2-carboxyethyl)phosphine (TCEP) to at least one biological molecule bound to a solid substrate and storing in an organic solvent. Preferably, the biological molecules are nucleic acids. Compositions and kits for performing the process according to the invention are also provided.

The present disclosure relates to compositions comprising a copolymer that includes a first monomer and a second monomer that is different from the first monomer, wherein both the first and second monomer are selected from the group consisting of 3-sulfopropyl acrylate potassium salt, sodium acrylate, N-(tris(hydroxyl methyl)methyl)acrylamide, and 2-acrylamideo-2-methyl-1-propane sulfonic acid. The present disclosure further relates to methods for preparing the copolymer compositions and shaped articles comprising the copolymers.

A polyoxyalkylene polyol or monool (I) of the general formula (1) below, in which not less than 40% of the terminally located hydroxyl-containing groups, namely -AO-H groups, are primary hydroxyl-containing groups of the general formula (2) below, or;a method of producing ring-opening polymerization products, by subjecting a heterocyclic compound to ring-opening addition polymerization with an active hydrogen-containing compound, using as a catalyst tris(pentafluorophenyl)borane, tris(pentafluorophenyl)aluminum, etc.

A composition comprising: (a) polyethylene; (b) as a scorch inhibitor, [1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione]; (c) a thioester; (d) a hindered amine stabilizer; and (e) an organic peroxide.

The invention discloses a method for fixing biological molecules on a polymer microporous membrane surface, comprising the following steps: (1) respectively dissolving DOPA compounds and the biological molecules in a trihydroxymethyl aminomethane - muriatic acid buffer solution and a phosphoric acid buffer solution to prepare solutions; (2) immersing a polymer microporous membrane in a DOPA compound solution and oscillating to cause the DOPA compounds to be auto-polymerized-compounded on the membrane surface and to be closely attached to the membrane surface and a membrane pore wall; (3) immersing the polymer microporous membrane modified by the DOPA compounds in a biological molecule solution, and fixing the biological molecules on the polymer microporous membrane surface by the addition reaction between catechol groups of the membrane surface and amidogen in the biological molecules. The method for fixing biological molecules on the polymer microporous membrane surface has simple process, the prepared polymer microporous membrane has good hydrophilic property and biocompatibility, and the method has important meaning for improving the permeability and the biocompatibility of the polymer microporous membrane.