Abstract: A fluorine-containing adhesive material comprising a fluorine-containing ethylenic polymer having a carbonate group and/or a carboxylic acid halide group at a chain end or a side chain of the polymer, wherein a total of a number of the carbonate groups and/or carboxylic acid halide groups is at less than 150 per 1×106 main chain carbon atoms, can directly impart the firm adherability to a substrate such as a metal, a glass or a resin while maintaining excellent properties such as chemical resistance, solvent resistance, weatherability and soil releasability possessed by a fluorine-containing polymer.

Abstract: The present invention is to provide a multilayer molding comprising a polyamide-based resin as an outer layer and having excellent interlayer adhesion, in particular, the multilayer molding comprising a fluorine-containing resin as an inner layer, as well as a resin laminate which can form the multilayer molding.

Abstract: The present invention is to provide a laminated resin molding comprising a polyamide-based resin composition as an outer layer and being excellent in interlayer adhesion strength, in particular a laminated resin molding comprising a fluorine-containing resin as an inner layer.

Abstract: A method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a heat treatment at a temperature of from room temperature to the melting point of the resin; a method for producing a regenerated fluororesin, characterized in that it comprises subjecting a used melt-molded fluororesin article to a supercritical washing treatment at a temperature of from room temperature to the melting point of the resin; and a regenerated fluororesin article containing substantially no impurities which is obtainable by the above method.

Abstract: The present invention provides a process for producing a fluorinated ionomer, comprising copolymerizing, in the presence of a polymerization initiator, (i) a compound represented by Formula (I) (M)1/LOSO2CFY(CF2)mO(CFXCF2O)nCF═CF2  (I)

Abstract: To provide a fluorine-containing resin composition useful as a molding material for parts of electronic and electrical equipment which assures well-balanced enhancement of dielectric property, heat resistance, mold-processability (precise processability) and mechanical properties and the parts of electronic and electrical equipment. The fluorine-containing resin composition for parts of electronic and electrical equipment comprises 70 to 95% by weight of (I) fluorine-containing resin mixture comprising (a) a fluorine-containing resin containing polytetrafluoroethylene not to be fibrillated and (b) a thermoplastic resin other than the fluorine-containing resin and 5 to 30% by weight of (II) a metal compound whisker having a single bond strength of not less than 190 KJ/mol calculated from a dissociation energy of bond between a metal element and oxygen. The parts of electronic and electrical equipment which are obtained from the composition have a dielectric constant of not more than 3.5.

Abstract: Novel silicon-containing organic fluoropolymers which are appliable to materials over a wide range and which have excellent antifouling property. The silicon-containing organic fluoropolymer of the invention is represented by the general formula and has a number average molecular weight of from 5×102 to 1×105: wherein Rf represents perfluoroalkyl; Z represents fluoro or trifluoromethyl; a, b, c, d and e each independently represent 0 or an integer of 1 or above, provided that a+b+c+d+e is not less than 1 and the order of the repeating units parenthesized by subscripts a, b, c, d and e occurring in the formula is not limited to that shown; Y represents hydrogen or alkyl containing 1 to 4 carbon atoms; X represents hydrogen, bromo or iodo; R1 represents hydroxy or a hydrolyzable substituent group; R2 represents hydrogen or a monovalent hydrocarbon group; 1 represents 0, 1 or 2; m represents 1, 2 or 3; and n represents an integer of 2 or above.

Abstract: The present invention provides acicular fine particles made up of iron and carbon, and these acicular metal iron fine particles can be prepared by contacting acicular iron carbide fine particles with a reducing agent containing no carbon atom. Further, the present invention provides a magnetic coating composition and magnetic recording medium containing the above acicular metal iron fine particles.

Abstract: An acicular fine particulate material which is coated with a compound containing at least one element selected from among elements of Groups III and IV of the Periodic Table in Periods 5 and 6, the acicular fine particulate material being one of (i) an acicular fine particulate material containing iron carbide, (ii) an acicular fine particulate material containing iron carbide, metallic iron and carbon, and (iii) an acicular fine particulate metallic iron containing carbon, is prepared by a promoted reduction reaction while being effectively prevented from sintering and consequently affords magnetic recording media having a high recording density.

Abstract: The present invention provides an acicular fine particles obtained by reducing an iron carbide starting material and containing metal iron, iron carbide and free carbon, the acicular fine particles having a mean particle size (long axis) of 0.1 to 0.5 .mu.m and an average axial ratio of 3 to 15 and containing 15 to 80 wt. % of metal iron, 10 to 75 wt. % of iron carbide and 5 to 13 wt. % of free carbon, process thereof, magnetic coating composition and magnetic recording medium containing the same.

Abstract: The present invention provides acicular particles (A) containing an iron carbide, which have (a) a free carbon content of at most 20 wt. %, and (b) and Fe.sub.5 C.sub.2 ratio(x) of at least 70% and a coercive force of 3.times.+300 to 7.times.+270 Oe, the ratio(x) being expressed by ##EQU1## where S1 is the X-ray diffraction strength of Fe.sub.5 C.sub.2, and S2 is the X-ray diffraction strength of Fe.sub.3 O.sub.4.The invention further provides particles (B) containing nickel and an iron carbide.The invention further provides acicular particles containing an iron carbide which are obtained by heating an aqueous dispersion of ferric hydroxide in an alkaline system in the presence of a water-soluble compound capable of coordinating to iron to obtain acicular .alpha.-ferric oxide and contacting the product with a carbon-containing reducing-and-carburizing agent or with a mixture of the agent and a carbon-free reducing agent, with or without contacting the product with the carbon-free reducing agent.

Abstract: Particles containing FeC are prepared by mixing (a) a boron compound or alkaline earth metal compound with (b) iron oxyhydroxide or iron oxide particles, or coating the former compound (a) to the latter particles (b), and then carburizing the mixture or coated particles with a carburizing agent.

Abstract: The present invention provides acicular particles (A) containing an iron carbide, which have (a) a free carbon content of at most 20 wt. %, and (b) an Fe.sub.5 C.sub.2 ratio(x) of at least 70% and a coercive force of 3x+300 to 7x+270 Oe, the ratio(x) being expressed by ##EQU1## wherein S1 is the X-ray diffraction strength of Fe.sub.5 C.sub.2, and S2 is the X-ray diffraction strength of Fe.sub.3 O.sub.4. The invention further provides particles (B) containing nickel and an iron carbide. The invention further provides acicular particles containing an iron carbide which are obtained by heating an aqueous dispersion of ferric hydroxide in an alkaline system in the presence of a water-soluble compound capable of coordinating to iron to obtain acicular .alpha.-ferric oxide and contacting the product with a carbon-containing reducing-and-carburizing agent or with a mixture of the agent and a carbon-free reducing agent, with or without contacting the product with the carbon-free reducing agent.