37results about "Cellulose substances" patented technology

A composition for preparing a porous interlayer dielectric thin film which includes a saccharide or saccharide derivative, a thermo-stable organic or inorganic matrix precursor, and a solvent for dissolving the two solid components. Also provided is a dielectric thin film having evenly distributed nano-pores with a diameter of less than 50 Å, which is required for semiconductor devices.

This invention is related to a reactive nanoparticular cyclodextrin derivative useful as a porogen and a low dielectric matrix, with excellent mechanical properties and uniformly distributed nanopores, manufactured by sol-gel reaction of the above reactive cyclodextrin. Furthermore, this invention also is related to an ultralow dielectric film, with uniformly distributed nanopores, a relatively high porosity of 51%, and a relatively low dielectric constant of 1.6, manufactured by thin-filming of the conventional organic or inorganic silicate precursor by using the above reactive nanoparticular cyclodextrin derivative as a porogen.

The invention discloses a fire-resistant fireproof cable formula. A formula of cable fireproof paint comprises the following ingredients in parts by weight: 15 to 16 parts of titanium dioxide, 12 to 18.2 parts of chlorcosane, 13 to 28 parts of alkyd resin, 12.6 to 13.8 parts of urethane resin, 20 to 28.6 parts of cellulose base fiber, 3 to 9 parts of methyltrimethoxysilane, 30 to 50 parts of antioxidizers, 2 to 5 parts of zinc oxide, 12 to 16 parts of compatilizers, 0.9 to 1.8 parts of nanometer aluminum nitride, 11 to 12 parts of polyvinyl alcohol, 20 to 32 parts of modified filling materials, 22 to 30 parts of polyvinyl chloride, 8 to 10 parts of chlorinated polyethylene, 30 to 55 parts of environment-friendly complex plasticizers, 28 to 32 parts of filling strengthening agents, 10 to 15 parts of low-density polyethylene and 30 to 40 parts of lubricating agents. A cable material provided by the invention has the advantage that through the effects of the coupling agents, the compatilizers, flame retardant synergists and the modified filling materials in the formula, the low-smoke halogen-free flame-retardant cable material has good processing performance and low-smoke halogen-free flame-retardant performance.

A power cable having a metallic electrical conductor surrounded by one or more semiconductive layer and more or more insulating layer, wherein the cable has at least one metallic element made of aluminum, having a corrosion inhibitor provided in direct contact with the at least one metallic element made of aluminum.

The present invention provides a nonporous highly dielectric film which can improve withstanding voltage, insulating property and dielectric constant, especially can decrease a dielectric loss at high temperatures and can be made thin, and a coating composition for forming the highly dielectric film comprising (A) a vinylidene fluoride resin, (B) a cellulose resin and (C) a solvent.

This invention provides a dielectric composition comprising a dielectric which is fireable in air at a temperature in the range of about 450° C. to about 550° C. and a conductive oxide selected from the group consisting of antimony-doped tin oxide, tin-doped indium oxide, a transition metal oxide which has mixed valence states or will form mixed valence states after firing in a nitrogen atmosphere at a temperature in the range of about 450° C. to about 550° C. and normally conducting precious metal oxides such as ruthenium dioxide, wherein the amount of conductive oxide present is from about 0.25 wt % to about 25 wt % of the total weight of dielectric and conductive oxide. This dielectric composition has reduced electrical resistance and is useful in electron field emission devices to eliminate charging of the dielectric in the vicinity of the electron emitter and the effect of static charge induced field emission.

The invention discloses a high-toughness heat-resistant cable sheathing compound, which is prepared from the raw materials including modified polylactic acid, ethylene-butyl acrylate copolymer, maleic anhydride grafted ethylene-octene copolymer, polyphenylene sulfide, aluminum diethylphosphinate, polyamide, ammonium polyphosphate, aluminum hypophosphite, melamine sodium polyphosphate, zinc borate, modified Lyocell fibers, glass fibers, modified silica, nano zinc oxide, nano titanium dioxide and aluminate ester. The cable sheathing compound of the invention has good toughness and excellent heat resistance.

The present invention relates to dielectric coatings and articles having a high but precisely defined surface resistivity.

The invention discloses a medium slurry with high acid resistance. The glass powder used in the medium slurry is obtained by tempering Bi-Si-B series glass powder at 500-600 DEG C for 20-24 hours; , β-cellulose, etc. to prepare organic carriers; chromium trioxide, cadmium trioxide, titanium dioxide, etc. are added as oxide additives to further enhance the stability of the slurry. The binder phase glass powder used in the medium slurry of the invention adds high temperature tempering on the basis of the traditional water quenching process, which can eliminate the internal stress generated in the process of smelting and ball milling, and further improve the compactness; at the same time, it is used in the preparation process of the organic carrier. Butyraldehyde oxime replaces terpineol, the prepared slurry not only has extremely high acid resistance, but also can ensure stable breakdown voltage and low encapsulation change rate, which can adapt to harsher use environments and prolong its use. It has obvious economic benefits at the same time of life.

The present invention discloses a slurry adaptive to an aluminum nitride base material and a preparation method thereof. The slurry comprises the following components of mass percents of 30-40% of glass powder, 24-42% of ruthenium oxide powder, 28-37% of organic solvent mixture and 1-3% of auxiliary, and the organic solvent mixture comprises terpilenol, butyl carbitol, butyl carbitol acetat, dibutyl phthalate, tri-n-butyl citrate and ethyl cellulose. The preparation method of the slurry is characterized by, according to the mass percents, obtaining the glass powder, the organic solvent mixture and the ruthenium oxide powder, and carrying out the stirring, three-roller grinding, filtering and deaeration processes to obtain the needed slurry. The slurry adaptive to the aluminum nitride base material of the present invention adopts the glass powder of a low softening point to support the selected organic solvent mixture, thereby being able to reduce the sintering temperature of the slurry. A sintered slurry layer has the excellent performances that the resistance is low, and the refiring resistance change rate is less than 3%. Meanwhile, the slurry does not contain the lead, has an excellent silkscreen performance, and is totally suitable for being used as a large-power density (greater than 80W / cm<2>) heating device.

The present invention relates to a device comprising a cable and / or a cable accessory, said cable and / or said cable accessory comprising at least one composite layer obtained from a composite composition based on at least one cellulose derivative, at least one organic compound having a boiling point or a decomposition temperature above about 100° C. and at least one cement composition selected from an aluminosilicate geopolymer composition and a magnesium-based composition, as well as to a method of manufacturing such a device.

The present invention is directed to a multilayer structure comprising: (a) a first layer containing polyester and cellulose wherein (i) the polyester is present in an amount of 0 to 50 weight percent floc and 50 to 100 weight percent fibrid, (ii) the cellulose is present in the form of cellulosic pulp fiber and; (iii) the polyester is present in an amount of 0.5 to 75 weight percent and the cellulose is present in an amount of 25 to 99 weight percent, said percentages on the basis of the polyester and cellulose and; (b) a second layer containing cellulosic pulp fiber with the proviso that the second layer does not contain polyester. The first layer may further comprise an aramid. The multilayer structure is particularly useful in a transformer.

The invention provides an anti-electromagnetic interference anti-breakage data line, belonging to the technical field of data lines. In the anti-electromagnetic interference anti-breakage data line, acarbon nanotube is a good electromagnetic shielding material, which has superior physicochemical and mechanical properties, and the excellent electromagnetic properties enable the material to exhibitgood electromagnetic shielding performance when the carbon nanotube is added into the composite material; Aramid fiber has high strength and toughness, and the carbon nanotube / aramid fiber conductivepaper has high strength, high toughness and a shielding effect, is an ideal data line coating layer material. The data of the data line provided by the embodiment shows that the anti-electromagneticinterference anti-breakage data line manufactured by the invention has electromagnetic shielding effectiveness of 39-46 dB in the frequency band of 175-1600 MHz, and can withstand bending tests for 5000-10000 times without obvious cracks.