45 results about "Diamantane" patented technology

Novel positive-working photoresist compositions are disclosed. The monomers of the base resin of the resist contain diamondoid-containing pendant groups higher than adamantane in the polymantane series; for example, diamantane, triamantane, tetramantane, pentamantane, hexamantane, etc. The diamondoid-containing pendant group may have hydrophilic-enhancing substituents such as a hydroxyl group, and may contain a lactone group. Advantages of the present compositions include enhanced resolution, sensitivity, and adhesion to the substrate.

A polymeric network comprises a plurality of monomers that include a cage compound with at least three arms, wherein at least one of the arms has two or more branches, and wherein each of the branches further comprises a reactive group. Monomers in contemplated polymeric networks are covalently coupled to each other via the reactive groups. Particularly contemplated cage compounds include adamantane and diamantane, and especially contemplated branched arms comprise ortho-bis(phenylethynyl)phenyl. Especially contemplated polymeric networks have a dielectric constant of no more than 3.0, and are formed on the surface of a substrate.

The invention relates to a rubber thin sheet grinding wheel and a preparation method thereof. The rubber thin sheet grinding wheel comprises the following raw materials in part by weight: 4 to 6 parts of natural rubber emulsion, 0.5 to 1.5 parts of zinc oxide, 4 to 6 parts of sulfur, 0.5 to 2.5 parts of epoxy resin, 0.4 to 0.6 part of anti-ager, 0.3 to 0.7 part of accelerant, 6 to 8 parts of silicon carbide, 2 to 4 parts of diamantane, 2 to 4 parts of chromium corundum, 1 to 3 parts of resin powder, 0.5 to 1.5 parts of resin liquid and 3 to 5 parts of coagulator. The rubber thin sheet grinding wheel of the invention has the advantages of high wear resistance, heat resistance, self-sharpening property, heat conductivity, corrosion resistance, toughness, hardness and working efficiency and long service life; in addition, the rubber thin sheet grinding wheel prepared by the preparation method of the rubber thin sheet grinding wheel of the invention is very thin and has low loss and high accuracy during cutting.

A positive photosensitive composition comprising: a resin which comprises a repeating unit having a diamantane structure and decomposes under an action of an acid to increase a solubility in an alkali developer; a compound capable of generating an acid upon irradiation with actinic rays or radiation; a compound represented by the following formula (1); and a solvent:

wherein R₁ represents a hydrogen atom or an alkyl group, m represents an integer of from 1 to 30, n represents an integer of from 0 to 3, and p represents an integer of from 0 to 5.

The invention discloses a preparation method of a shell with long and thin blades of an investment casting aero-engine. The preparation method comprises the following steps: mixing 5%-10% of cobaltous oxide powder and 90%-95% of electric smelting diamantane, roasting at 1200 DEG C-1350 DEG C, cooling to room temperature, and grinding so as to prepare a nucleating agent; preparing a mixed powder material from the nucleating agent and diamantane powder, adding silica sol into the mixed powder material so as to prepare slurry, coating the first layer of the shell with the slurry, coating the second layer to the eighth layer of the shell with the slurry prepared from the diamantane powder and silica sol, carrying out sand-lining on the first and second layers with No.80-No.100 emery, carrying out sand-lining on the third and fourth layers with No.46-No.60 emery, and carrying out sand-lining on the fifth-eighth layers with No.16-No.25 emery. Compared with a traditional shell preparation method, the shell prepared by the method disclosed by the invention is compact and smooth in surface; the long and thin blades of the aero-engine, which are prepared from the shell, are smooth in surface, and are refined in crystal grain, and can reach the technique requirements.

A positive photosensitive composition comprising: (A) a compound which generates an acid upon irradiation with actinic rays or a radiation; (B) a resin which decomposes by an action of an acid to come to have an enhanced solubility in an alkaline developing solution; and (F) a solvent, wherein the resin as the component (B) is a resin that has a repeating unit (Ba) having a diamantane structure, and wherein the resin as the component (B) has a weight-average molecular weight of from 3,000 to 30,000 and a dispersity ratio of from 1.1 to 3.0; and a method of pattern formation using the positive photosensitive composition.

The present invention provides adamantane or diamantane compositions that are useful as a dielectric material in microelectronic applications such as microchips.

Thermal stability of cryomilled Al+1% diamantane was investigated in the temperature range of 423 to 773K. Diamantane is a nanosized hydrocarbon molecule with a 14 carbon atom diamond cubic framework that is terminated by hydrogen atoms. Following the cryomilling of the Al powders and diamantane cages, the average grain size characterized using transmission electron microscopy (TEM) and X-ray diffraction (XRD). The as-cryomilled grain sized was found to be of the order of 22 nm, essentially the same as that for Al cryomilled without diamantane. To determine thermal stability, the powders were sealed in glass tubes in an Ar atmosphere to avoid oxidation and contamination and annealed at different temperatures between 423 and 773K for different holding times. Following these treatments, the grain size of cryomilled Al+1% diamantane was consistently less than that for cryomilled Al by about a factor of two. Preliminary investigations indicate that the grain growth exponent n decreased with increasing temperature, reaching a value of approximately 35 at 423 K. Such a high value of n suggests the operation of strong pinning forces on boundaries during annealing treatment. The thermal stability data were found to be consistent with Burke's model based on drag forces exerted by dispersion particles.

Embodiments of the invention provide a method and a device for determining the type of an oil and gas reservoir. The method comprises the following steps of obtaining type and content data of diamantane series compounds in a crude oil sample of a reference oil and gas reservoir; carrying out analysis and processing on the reference oil and gas reservoir to obtain the type of the reference oil and gas reservoir; and carrying out fitting analysis and processing on the type and content data of the diamantane series compounds and the type of the reference oil and gas reservoir and determining a fitting relation between the type and content data of the diamantane series compounds and the type of the reference oil and gas reservoir; and determining the type of a to-be-tested oil and gas reservoir based on the fitting relation and the type and content data of the diamantane series compounds in the obtained crude oil sample of the to-be-tested oil and gas reservoir. Through utilizing the technical scheme provided by the embodiments of the invention, the reservoir type of the to-be-tested oil and gas reservoir can be determined quickly and accurately.

A liquid crystalline compound has excellent liquid crystal properties, particularly high phase transition temperature. Diamantane compounds are represented by the general formula (I):

(I) wherein A and B are each a six-membered, saturated or unsaturated, carbo- or hetero-cycle, and these cycles may have substituents, which substituents may be united to form a ring; and R1 and R2 are each a hydrocarbon group having 1 to 18 carbon atoms, and part of the carbon atoms of the hydrocarbon group may be replaced by heteroatoms or heteroatom-containing groups, while part of the hydrogen atoms thereof may be replaced by halogen atoms or heteroatom-containing groups.

In a method of producing a low dielectric constant polymer, a thermosetting monomer is provided, wherein the thermosetting monomer has a cage compound or aryl core structure, and a plurality of arms that are covalently bound to the cage compound or core structure. In a subsequent step, the thermosetting monomer is incorporated into a polymer to form the low dielectric constant polymer, wherein the incorporation into the polymer comprises a chemical reaction of a triple bond that is located in at least one of the arms. Contemplated cage compounds and core structures include adamantane, diamantane, silicon, a phenyl group and a sexiphenylene group, while preferred arms include an arlyene, a branched arylene, and an arylene ether. The thermosetting monomers may advantageously be employed to produce low-k dielectric material in electronic devices, and the dielectric constant of the polymer can be controlled by varying the overall length of the arms.

A film formed by chemical vapor deposition of a diamantane or adamantane compound having a particular substituent or a composition containing the compound.

The invention discloses diamantane fuel. The content of alkyl diamantane in the diamantane fuel is higher than 85.0 wt%, the freezing point of the diamantane fuel is lower than -75 DEG C, and the density of the diamantane fuel is higher than 0.98 g/cm<3>; one or a plurality of types of the alkyl diamantane is shown. The invention further discloses a method for preparing the diamantane fuel.

The invention discloses a preparation method of 1-bromoadamantane. The method comprises the steps that diamantane is added into a reactor, the temperature inside the reactor is controlled to be 10-15 DEG C, then, a mixed solution of bromine and an organic solvent A is added dropwise into the reactor, dropping is completed in 1-3 h, then, the temperature is increased to 40 DEG C, the temperature is kept constant for 1 h, then, the temperature inside the reactor is gradually increased to 110 DEG C within 7 h in the 10 DEG C/h temperature programming mode, and after the temperature is kept constant for 4-6 h, reduced pressure distillation is performed to recycle a mixed solution of bromine and the organic solvent A; then, an organic solvent B is added into the reactor to perform cooling crystallization, after filtering, filter cakes are washed with distilled water till the pH value is 6-7, and airing is performed to obtain the 1-bromoadamantane. According to the method, in a bromination reaction, organic solvent glacial acetic acid (organic solvent A) is introduced, compared with a traditional method, on the premise that the reactions are not affected, the organic solvents are added to restrain volatilization of the bromine, the bromine can be effectively recycled, the recycling rate is larger than 90%, the cost is reduced, and discharge of waste gas, water and industrial residues is reduced.

The present invention discloses a method for producing a polymerizable hydroxydiamantyl ester compound, which comprises di-halogenating a raw material compound having a diamantane skeleton, such as diamantane or the like, then hydrolyzing the di-halogenation product to produce a 4,9-diamantanediol compound, thereafter esterifying the 4,9-diamantanediol compound in a mixture of a polymerizable unsaturated carboxylic acid and a polymerizable unsaturated carboxylic acid anhydride in the presence of a polymerization inhibitor and an acid catalyst, to obtain a polymerizable hydroxydiamantyl ester compound.

Disclosed is a method for producing polyhalogenated diamantanes which is characterized by reacting diamantanes with a halosulfonic acid. Also disclosed is a method for producing diamantane polyols which is characterized in that the polyhalogenated diamantanes obtained by the above-described method are reacted with water in the presence of a water-soluble organic solvent and a carboxylate.