摘要:
In a method of producing a keto acid having the general formula ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl of 1-6 carbons or a cycloalkyl of 4-8 carbons, by reacting an m-aminophenol having the general formula ##STR2## wherein R.sup.1 and R.sup.2 are the same as above, with phthalic anhydride, in an organic solvent, the improvement comprising effecting the reaction in an amount of the organic solvent which is insufficient to dissolve the keto acid produced in the reaction, so that at least a portion of the resultant keto acid crystallizes out of the solvent and allowing the reaction to proceed in a heterogeneous system.
摘要:
N-alkyl amino phenols, such as N-ethyl-m-amino phenol are produced in high yield and with high purity by reacting a divalent phenol, such as resorcinol, with an alkylamine, such as ethylamine, in the absence of catalyst and solvent, at a temperature of 120.degree.-210.degree. C. under elevated pressure in an inert gas atmosphere. In a first embodiment, the resulting reaction mixture is acidified to convert the N-alkylaminophenol to its water soluble salt and the resulting aqueous layer is separated from the oily layer. The aqueous layer is rendered alkaline to liberate N-alkylaminophenol as an oily layer. The N-alkyl-aminophenol oily layer is then separated from the aqueous layer and distilled. In an alternative embodiment, the reaction mixture resulting from the reaction between the divalent phenol and alkylamine is combined with an aqueous solution of an alkali to convert unreacted phenol to its water soluble salt while the product N-alkylaminophenol remains in an oily phase which is separated from the aqueous phase. An organic solvent is used as an extractant. The recovered N-alkylaminophenol organic solution is then distilled to recover N-alkylaminophenol. Purities of the recovered N-alkylaminophenol in excess of 95% can be achieved.
摘要:
A paint film-protecting sheet, which is unwound from a roll for use, and in which occurrence of adhesive transfer at edges thereof is effectively prevented, and a method of manufacturing same are provided. The paint film-protecting sheet is in the form of a roll obtained by winding in a lengthwise direction a pressure-sensitive adhesive sheet formed of a substrate in continuous sheet form and a pressure-sensitive adhesive layer disposed on the substrate. The substrate comprises a resin component made primarily of polyethylene resin or polypropylene resin. The paint film-protecting sheet, after being unwound from the roll, has a percent shrinkage, in the lengthwise direction, of not greater than 1.2% when heated at 80° C. for 1 hour.
摘要:
The present invention provides a novel production process by which unstable terminal groups can be sufficiently stabilized under mild conditions. The present invention is related to a method for producing an —SO3H group-containing fluoropolymer wherein a fluoropolymer to be treated having a —SO2X group-containing monomer unit (X representing F or Cl) is subjected to a procedure comprising at least the steps A, B and C defined below in that order: A: Step of reacting with a halogenating agent; B: Step of reacting with a decomposition treatment agent; C: Step of reacting with a fluorinating agent.
摘要:
A network system includes a switch device and a plurality of communication terminals. The switch device has a plurality of ports. The switch device receives a packet at its one port and transmits the packet from another port corresponding to the packet's destination. The communication terminals are connected to the ports of the switch device respectively to transmit and receive packets. The terminal transmits a connection request including connection destination information to the switch device and performs communication using unused signal lines when a “connection possible” notification is received from the switch device. Upon receiving the connection request, the switch device determines if connection to a port corresponding to the connection destination information is possible. If connection is possible, the switch device transmits a “connection possible” notification to the connection-request-making terminal and connects an unused signal line of the port connected to the terminal to a signal line of the port corresponding to the connection destination.
摘要:
A network system includes a switch device and a plurality of communication terminals. The switch device has a plurality of ports. The switch device receives a packet at its one port and transmits the packet from another port corresponding to the packet's destination. The communication terminals are connected to the ports of the switch device respectively to transmit and receive packets. The terminal transmits a connection request including connection destination information to the switch device and performs communication using unused signal lines when a “connection possible” notification is received from the switch device. Upon receiving the connection request, the switch device determines if connection to a port corresponding to the connection destination information is possible. If connection is possible, the switch device transmits a “connection possible” notification to the connection-request-making terminal and connects an unused signal line of the port connected to the terminal to a signal line of the port corresponding to the connection destination.
摘要:
The present invention relates to a method of producing the fluoropolymer according to any one of claims 1 to 3, by subjecting a fluoropolymer precursor containing acid/acid salt groups and having —CF2COOX groups at polymer chain terminals, in the formula X represents H, NR11R12R13R14 or M41/L; R11, R12, R13 and R14 are the same or different and each represents H or an alkyl group containing 1 to 4 carbon atoms and M4 represents a metal having a valence of L, said metal having a valence of L being a metal belonging to the group 1, 2, 4, 8, 11, 12 or 13 of the long-form periodic table, to heat treatment for the conversion of said —CF2COOX groups to —CF2H groups, X being as defined above, wherein said fluoropolymer precursor is one obtained by polymerizing a perhalovinyl ether derivative represented by the general formula (I): CF2═CF—O—(CF2CFY1—O)n—(CFY2)m—SO2Z (I) wherein Y1 represents F, Cl or a perfluoroalkyl group, n represents an integer of 0 to 3, the n atoms/groups of Y1 are the same or different, Y2 represents F or Cl, m represents an integer of 1 to 5, the m atoms of Y2 are the same or different and Z represents F, Cl, Br, I, —OM51/L or —ONR15R16R17R18; M5 represents a metal having a valence of L and the metal having a valence of L is as defined above, and R15, R16, R17 and R18 are the same or different and each represents H or an alkyl group containing 1 to 4 carbon atoms, when the group —SO2Z in the general formula (I) is not said acid/acid salt group but is a group convertible to such acid/acid salt group, said fluoropolymer precursor is one subjected to a conversion treatment, after the above-mentioned polymerization, for the conversion of said group —SO2Z to the above-mentioned acid/acid salt group, and said heat treatment comprises heating said fluoropolymer precursor at 120 to 400° C.
摘要:
The present invention provides a method for producing a stabilized fluoropolymer which comprises producing the stabilized fluoropolymer by subjecting a treatment target substance containing a sulfonic-acid-derived-group-containing fluoropolymer to a fluorination treatment, wherein the sulfonic-acid-derived-group-containing fluoropolymer is a fluoropolymer containing —SO3M (in which M represents H, NR1R2R3R4 or M11/L; R1, R2, R3 and R4 are the same or different and each represents H or an alkyl group containing 1 to 4 carbon atoms; and M1 represents an L-valent metal), and the treatment target substance has a moisture content of not higher than 500 ppm by mass.
摘要翻译:本发明提供一种稳定的含氟聚合物的制造方法,其特征在于,含有含有磺酸衍生基的含氟聚合物的处理对象物质进行氟化处理,其中,所述磺酸衍生基团 - 含氟聚合物是含有-SO 3 M(其中M表示H,NR 1,R 2,R 3,S 3 O, R 4或M 1/1 / L; R 1,R 2,R 2, R 3和R 4相同或不同,各自表示H或含有1至4个碳原子的烷基;和M 1〜 表示L价金属),处理对象物质的水分含量不高于500质量ppm。