摘要:
A dry etching gas that comprises a compound having a CF3CF fragment directly bonded to a double bond (provided that the compound is exclusive of CF3CF═CFCF═CF2). Said dry etching gas permits the formation of a pattern such as a contact hole with a high aspect ratio.
摘要:
There are provided novel crosslinked fluorine-containing elastomer fine particles, a process for preparing crosslinked fluorine-containing elastomer fine particles and a resin composition comprising the same. The crosslinked fluorine-containing elastomer fine particles are crosslinked fluorine-containing elastomer fine particles having a gel fraction of not less than 85% by mass or crosslinked fluorine-containing elastomer fine particles obtained by crosslinking fluorine-containing elastomer particles having at least three iodine atoms per one polymer molecule at an end thereof. The composition is one comprising those fine particles and a synthetic resin. The preparation process is a process for preparing crosslinked fluorine-containing elastomer fine particles, characterized by subjecting peroxide-crosslinkable fluorine-containing elastomer particles to peroxide-crosslinking by heating an aqueous dispersion comprising the fluorine-containing elastomer particles, a peroxide and a polyfunctional unsaturated compound.
摘要:
A polymer composite material provides superior heat resistance, mechanical physical properties, substance permeation barrier properties, flame retardant properties, electrical conductivity and the like. Moreover, a novel surface-modified nanofiller utilizes this type of polymer composite material. The polymer composite material contains nanofillers, fluorocompounds and polymers. Fluoruocompounds bond to the surface of the nanofillers. The nanofillers to which fluorocompounds are surface-bonded are mixed with or dispersed in polymers.
摘要:
A manufacturing method for 1,1,1,3,3-pentafluoropropane in which the method is composed of:step A wherein 2,3-dichloro-1,1,1,3,3-pentafluoropropane is reduced with hydrogen under the presence of hydrogenation catalyst in gaseous phase;step B wherein all of the products of the said step A are introduced into a cooler condenser, so that either a component of hydrogen and hydrogen chloride as non-condensation component and another compoment of 1,1,1,3,3-pentafluoropropane as condensation components or a component of hydrogen as non-condensation component and another component of hydrogen chloride and 1,1,1,3,3-pentafluoropropane as condensation component are obtained;step C wherein hydrogen is separated from the non-condensation component of the said step B, and it is recycled to the said step A; andstep D wherein 1,1,1,3,3-pentafluoropropane is separated from the condensation component of the said step B.The producing method based on a manufacturing process of 1,1,1,3,3-pentafluoropropane can be provided with good efficiency and economy in industrial scales.
摘要:
At least one halogenated compound selected from the group consisting of 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane, 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, 1,1,1,2,4,4,4-heptafluoro-2-butene and 1,1,1,2,2,4,4,4-octafluorobutane, is prepared by reacting 1,1,2,3,4,4-hexachloro-1,3-butadiene with hydrogen fluoride in a gas phase in the presence of a fluorinating catalyst. Desired products can be prepared commercially according to the present invention.
摘要:
There are provided production methods of 1,1,1,3,3-pentafluoropropane characterized in that 1,1,1,3,3-pentafluoro-2,3-dichloropropane is reacted with hydrogen fluoride in the presence of a noble metal catalyst; of 1,1,1,3,3-pentafluoro-2-halogeno-3-chloropropane characterized in that the halogenated propene indicated as general formula I is fluorinated in the presence of antimony trihalogenide and/or antimony pentahalogenide by hydrogen fluoride of mole ratio of or over five times the said antimony halogenide in a liquid phase; and of 1,1,1,2,3,3-hexaohloropropene characterized in that 1,1,1,2,2,3,3-heptachloropropane is reacted with an aqueous solution of alkali metal hydroxide in the presence of a phase transfer catalyst. Therefore, an industrial manufacturing method which is possible to obtain the objective product easily at low cost and high yield can be provided.
摘要:
A method of producing 1,1,1,2,3,3-hexafluoropropane in a characteristic process in which tetrafluorochloropropene is first obtained from the dechlorofluorination (removing ClF) of 1,1,1,2,2-pentafluoro-3,3-dichloropropane and/or 1,1,2,2,3-pentafluoro-1,3-dichloropropane by hydrogen in the presence of a metal oxide catalyst and then the product olefin is fluorinated in the presence of a catalyst. By this method, 1,1,1,2,3,3-hexafluoropropane, which is useful as an action fluid and so on and has a property to help preserving the environment, and an intermediate in its synthesis can be easily produced at low cost.
摘要:
A solvent composition comprising a mixture of at least one polyfluoroalkane and at least one lower alcohol, wherein the polyfluoroalkane is selected among those represented by the general formula (1): (CF.sub.3).sub.2 CF--R wherein R represents a fluorinated ethyl group substituted by 1 to 4 fluorine atoms, and the lower alcohol is selected from the group consisting of methyl, ethyl, n-propyl and isopropyl alcohol.
摘要:
There is provided a fluorine-containing polymer having an ionic group which has a heteroaromatic ring and is useful as a material comprising various heteroaromatic ring compounds having a stable fluorine-containing heteroaromatic ring, and further a fluorine-containing polymer having a heteroaromatic ring which is useful as a starting material of the above-mentioned polymer or a curing agent. Also, there is provided a fluorine-containing polymer having a heteroaromatic ring such as imidazole in its side chain, a polymer salt thereof, and a polymer composition comprising such a polymer and a polymer salt and a nano filler.
摘要:
There is provided a novel fluorine-containing polymer having an acid-reactive group which has a high transparency against energy rays (radioactive rays) in a vacuum ultraviolet region (157 nm), and further there are provided a material for fluorine-containing base polymer prepared from the polymer and suitable for a photoresist and a chemically amplifying type resist composition obtained therefrom. The polymer has a number average molecular weight of from 1,000 to 1,000,000 and represented by the formula: -(M1)-(M2)-(A)-, wherein M1 is a structural unit having an acid-labile or acid-degradable functional group, M2 is a structural unit of fluorine-containing acryl ester, A is a structural unit derived from other copolymerizable monomer, the percent by mole ratio M1/M2 is 1 to 99/99 to 1 and the polymer comprises from 1 to 99% by mole of the structural unit M1, from 1 to 99% by mole of the structural unit M2 and from 0 to 98% by mole of the structural unit A1. The material for fluorine-containing base polymer comprises a fluorine-containing polymer having an acid-reactive group such as the above-mentioned polymer and is suitable for a photoresist, and the chemically amplifying type resist composition is obtained from those polymer and material.