318 results about "Organic tin compound" patented technology

To suppress the adherence of debris as a result of a radiating fuel, such as tin or the like, within a vessel for forming high density and high temperature plasma of an extreme UV radiation source device, and to eliminate deposited tin and/or tin compounds with high efficiency, hydrogen radical producing parts are provided in the vessel; and hydrogen radicals are produced in the vessel so that deposition of tin and/or a tin compound is suppressed in the area with a low temperature of the device, such as a focusing mirror or the like, and the deposited tin and/or tin compound is eliminated.

A process for preparing a naphtha reforming catalyst has been developed. The process involves the use of a chelating ligand such as ethylenediaminetetraacetic acid (EDTA). The aqueous solution of the chelating ligand and a tin compound is used to impregnate a support, e.g., alumina extrudates. A platinum-group metal is also an essential component of the catalyst. Rhenium may also be a component. A reforming process using the catalyst has enhanced yield, activity, and stability for conversion of naphtha into valuable gasoline and aromatic products.

An object of the present invention is to provide a curable composition made mainly of an organic polymer having a reactive silicon group, exhibits a good curability without using any organic tin compound substantially, and gives a cured product having a sufficient strength; and to provide a catalyst composition. The object is solved by a curable composition, comprising a polymer (A) having a silicon-containing group which can be crosslinked by forming a siloxane bond, and a fluoride salt compound (B).

The invention provides a preparation method for nanometer zinc hydroxystannate and nanometer zinc stannate. Said method uses tin compounds as raw materials to prepare zinc hydroxystannate with particle size of 2-100 nm. Nanometer zinc stannate can be obtained by sintering the zinc hydroxystannate at high temperature. Zinc hydroxystannate (xZnO*ySnO*zH2O) has a molar ratio of x : y : z at 1 : 0.8-1.4 : 1-5. They can be used alone or mixed for polymer materials, and has a good effect on flame retardancy and smoke suppression. Nanometer zinc hydroxystannate can merely be used in the material operating less than 180DEG C, while nanometer zinc stannate can be used for various polymer materials. In addition, both can be also used for gas-sensitive materials and lubricant additives.

Improvements in the tensile mechanical properties and dynamic viscoelastic properties of silica-reinforced sulfur-vulcanized rubbers can be achieved by compounding elastomers with silica, in the presence of a silane and a catalytic amount of an alkyl tin compound at a high compounding temperature.

An object of the present invention is to provide a curing composition which is practically curable and highly adhesive even though a non-organotin compound is included as a curing catalyst. Problems involved are solved by a curing composition characterized by including (A) an organic polymer having one or more silicon-containing groups capable of cross linking by forming siloxane bonds, (B) a metal carboxylate and/or carboxylic acid, and (C) a silicon compound having a hetero atom on the carbon atom in the α or β position with respect to the silicon atom.

The invention provides a flame-retardant dealcoholization type room-temperature curing silicon rubber, comprising: (1) polysiloxane, wherein the end of the polysiloxane is trimethoxy; (2) reinforcing fillers such as white carbon black, calcium carbonate and the like; (3) flame-retardant fillers such as aluminum hydroxide, zinc carbonate, carbon black and the like; (4) platinum compound added after the mixing; and (5) a condensation curing agent which comprises methyltrimethoxy silane, a silane coupling agent, organic titanate or organic tin compounds. The flame retardant dealcoholization type room-temperature curing silicon rubber of the invention has the characteristics of quick curing, excellent binding force to various base materials, good flame retardance, no halogen and the like.

A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a lanthanide compound, (b) an organoaluminum hydride, and (c) a tin halide compound.

The invention discloses a tin compound superlattice barrier semiconductor transistor, comprising a superlattice barrier layer, wherein the superlattice barrier layer is formed by multi-cycle thin film layers overlapped alternatively, and the thin film layer is composed of tin compound and another doped tin compound. By using the novel compounds of tin and the doping of the tin compounds, a multi-cycle superlattice barrier layer process is formed to obtain low dislocation density, smooth profile of HEMT (High Electron Mobility Transistor), low chip square resistance; the multi-cycle superlattice barrier layer with high conductive performance, high driving current and low MOS (Metal Oxide Semiconductor) interface state density is achieved, and the two-dimensional electron gas concentration or the two-dimensional hole gas concentration in a channel layer is also improved.

Zinc stannate material has excellent performances such as photocatalysis, flame redardation, smoke inhibition and the like, and the invention provides a preparation method for nanometer zinc stannate. According to the method, a cheap stannum compound is taken as the raw material for preparation of zinc stannate with a particle size of 5-100 nm. The obtained zinc stannate is controllable in size and morphology, is widely applicable to polymer materials, and has extremely good effect of retarding flame and inhibiting smoke; the zinc stannate is applicable to exploitation of aldehyde-removing flame-retardant materials; and also zinc stannate is applicable to lubricating oil additives and gas-sensitive materials.

Rare-earth and calcium and zinc stabilizing agent for polyethylene is produced by treating rare-earth and calcium and zinc compounds with surface modifying agent, and optimizing with polyethylene and anti-oxidating agent or/and organic tin compounds or organic phosphonite compounds or/and C8 - C22 metal saponified materials of calcium or zinc or magnesium or aluminum or/and ultraviolet absorber or/and urate or/and polyhydroxy esterified materials or/and polyethylene lubricant to be obtained. It has high quality and no toxicity, is produced with low cost and in a simple process.

A problem of the present invention is to provide a curable composition which gives good curability, adhesiveness and storage stability by use of a catalyst other than organic tin catalysts. The above problem is solved by a curable composition, comprising: (A) one or more organic polymers having a reactive-silicon-containing group, and (B) a silanol condensation catalyst consisting of one or more compound(s) selected from organic tin compounds, carboxylic acids, and amine compounds, wherein at least one part of the reactive-silicon-containing group(s) of the organic polymer(s) (A) is represented by the following general formula (1): —(CR²₂)₂—(SiR¹_2-aX_aO)_m—SiX₃ (1), and the silanol condensation catalyst (B) consists of amine compound(s) (B1) or consists of amine compound(s) (B1) and a carboxylic acid (B2), and when the mol number of the amine compound(s) is regarded as 1, the ratio by mol of the total amount of the carboxylic acid(s) to the amount of the amine compound(s) is 0.1 or less.

The invention relates to an anti-fouling paint composition. Film-forming substances of the anti-fouling paint are fluororesin and organic silicon resin. The paint composition comprises the components in parts by weight: 5-25 parts of film-forming substance, 5-25 parts of organic solvent and 1-10 parts of pigment. The anti-fouling paint also contains a leveling agent. According to the invention, the fluororesin and organic silicon resin are used as the film-forming substances, the characteristic of low surface energy of the film-forming substances is utilized, and other auxiliary agents are matched to obtain the anti-fouling paint; and the obtained anti-fouling paint has no harm to human body and ocean environment, and has better anti-fouling action on biological dirt. The anti-fouling paint composition is suitable for antifouling of fishing nets, vessels, underwater equipment and other ocean equipment, and is free of mercury or organo-tin compounds capable of causing organic solvent pollution on the sea.

The invention provides a dealcoholized silicone sealant and a preparation method thereof. The formula of the sealant comprises the following components in parts by weight: 100 parts by weight of poly-alkoxy silicyl polydimethylsiloxane, 1-20 parts by weight of cross-linking agent, 1-50 parts by weight of gaseous phase white carbon black, 0.1-10 parts by weight of tackifier, 0.001-1 part by weight of catalyst and 0-30 parts by weight of silicone oil plasticizer, wherein the viscosity of the poly-alkoxy silicyl polydimethylsiloxane at 25 DEG C is 0.1 Pa.S to 500 Pa.S; the cross-linking agent is one or more of morpholinyl methyl trialkoxy silane or partial hydrolysis condensates thereof; the catalyst is an organic tin compound. The dealcoholized silicone sealant provided by the invention has the characteristics of good transparency, low yellowing, storage stability, excellent adhesion and the like.

The invention provides a preparation method of sucrose 6 ester. The preparation method comprises the following steps: preparing a reaction solution of sucrose and an organic tin compound; atomizing the reaction solution to form small liquid drops; fully mixing and contacting the droplets with a gasified dehydration medium, and carrying out dehydration reaction on the droplets so as to generate anintermediate mixture containing the sucrose organic tin ester droplets; separating the intermediate mixture to obtain a sucrose organic tin ester solution and a dehydrated gas-liquid mixture; recovering the sucrose organic tin ester solution obtained in the separation step and circulating the sucrose organic tin ester solution to the atomization step and the dehydration step for multiple times; and carrying out acylation reaction on the sucrose organic tin ester solution and organic anhydride to generate sucrose 6 ester. According to the method, rapid and efficient dehydration of the esterification reaction can be realized in an extremely short time, the sucrose organic tin ester intermediate is efficiently prepared, decomposition of carbohydrates and side reactions in the system are reduced to a great extent, the energy consumption is low, the product yield is high, the selectivity is high, and the sucrose reaction degree is more thorough.

The invention provides a polyisocyanate composition which can restrain coloring even adding and storing compounds including tin. The polyisocyanate composition at least employes 1,6-diisocyanato and includes ppm chlorinated compounds with 1-100 mass of chlorine.

The invention discloses a pollution/rain flashover resistant paint. The paint comprises the following components in parts by weight: 40-50 parts of silicon rubber, 40-50 parts of MQ silicon resin, 50-80 parts of a solvent, 5-20 parts of fillers, 50-70 parts of silicone acrylate resin, 0.5-3 parts of a curing agent and 3-6 parts of catalysts, wherein the silicon rubber is hydroxyl-terminated polydialkylsiloxane; the MQ silicon resin is methyl hydrogen-containing MQ silicon resin with M-Q ratio being 0.6-0.9; the solvent is one or mixture of butyl acetate, ethyl acetate and methyl acetate; the fillers are one or more of nano calcium carbonate, fumed silica, titanium dioxide and silica micropowder, which are subjected to surface modification treatment by silane; the curing agent is zirconiumisooctoate, cobalt isooctoate or cobalt naphthenate; and the catalysts are tin compounds or organic titanium compounds. The invention also discloses a preparation method of the pollution/rain flashover resistant paint.