Abstract: A removal cleaning agent for discolored sections of titanium building materials which comprises at least a water-soluble inorganic acid salt, an organic acid or organic acid salt, a surfactant and a hydrophilic oxygen-containing hydrocarbon solvent, and optionally an discoloration inhibitor, fluoracarbon resin and polishing material. In the cleaning method for discolored sections of titanium building materials, coating is carried out with a bristle brush and a sponge roller, the coated film sections are polished with a nonwoven fabric or foam resin, optionally after aging, and then the discolored sections are removed by washing with water.

Abstract: A removal cleaning agent for discolored sections of titanium building materials which comprises at least a water-soluble inorganic acid salt, an organic acid or organic acid salt, a surfactant and a hydrophilic oxygen-containing hydrocarbon solvent, and optionally an discoloration inhibitor, fluoracarbon resin and polishing material. In the cleaning method for discolored sections of titanium building materials, coating is carried out with a bristle brush and a sponge roller, the coated film sections are polished with a nonwoven fabric or foam resin, optionally after aging, and then the discolored sections are removed by washing with water.

Abstract: Lubricants for electromagnetic recording media are characterized in that they are amides, imides or amide-imides consisting of perfluoroalkylpolyether derivatives. The derivatives are reacted with perfluoropolyether radicals and cyclic amino compounds, nitrogen-containing heterocyclic amino compounds and phosphonitrile amide compounds. The general formula is represented by (1)(Rf) l--Z . . . (1)with the molecular weight of the Rf group being comprised between 400 and 10,000.

Abstract: The object of the present invention is to provide a lubricant which has a wide range viscosity-temperature characteristic, low pour point and compatibility with hydrogen-containing chloro-fluoro carbons and fluoro carbons refrigerants.To achieve the object mentioned above, a lubricant for hydrogen-containing chloro-fluoro carbon and fluoro carbon refrigerants according to the present invention has a formula (1): ##STR1## wherein n is 3 to 4, X and X' are same or different and each selected from a group of moieties represented by the formula:R.sub.1 --(OR.sub.2).sub.l --O--wherein R.sub.1 is an alkyl group of 1 to 12 carbon atoms or aryl group of 6 to 18 carbon atoms, R.sub.2 is an alkylene group of 2 to 4 carbon atoms, and the chain of OR.sub.

Abstract: The lubricants according to the present invention are comprised of fluorine-containing alkyl carbonyl, polyperfluorooxyalkylenefluoropropionyl, polyperfluorooxyalkylene copolymerized oxyfluoroalkyl carbonyl chains and the like, and of which compounds are reacted with hetero cyclic groups obtained by amidization with polar groups between the radicals and compounds with typical organic end-groups.The novel compounds referred to above are lubricants characterized in that they can be represented by the general formula (1) and that the molecular weight of Rf ranges from 200 to 15,000. ##STR1## wherein Rf represents any one of the following groups: ##STR2## where l is an integer having a value between 3 and 150, and m an integer ranging from 1 to 50, and where X may be H--, F--, CF.sub.3 --, C.sub.2 F.sub.5 --, C.sub.3 F.sub.7 --, CF.sub.3 O--, C.sub.2 F.sub.5 O--, or C.sub.3 F.sub.7 O--, and Y may be F--, CF.sub.3 --, or C.sub.2 F.sub.5 -- respectively.

Abstract: A synthetic lubricant comprising a compound represented by the following general formula (I): ##STR1## wherein Rf and Rf' represent a fluorine-containing polyoxyalkylene group, X and X' a polar group, Y of one or more selected from the group consisting of methylane, ethylene, propylene, oxygen, ketone, imino, sulfon and sulfur or no atom or group, and n an integer of 0 to 5, and a magnetic recording medium coated with this lubricant.

Abstract: The corrosion inhibited lubricants according to the present invention are comprised of fluorine-containing alkyl carbonyl, fluorine-containing alkylmethyl, ethylcarbonyl, polyperfluorooxyalkylenefluoropropionyl, polyperfluorooxyalkylene copolymerized with oxyfluoro-alkyl carbonyl chains and the like, and which compounds are reacted with hetero cyclic groups and obtained by amidization with polar groups between the radicals and compounds with typical organic end-groups.The novel compounds referred to above are lubricants with anti-corrosive properties characterized in that they can be represented by the general formula (1) and that the molecular weight of Rf ranges from 200 to 15,000, preferably from 200 to 10,000.Rf--z 2(RF)--z (1)whereinRf represents any one of the following groups: ##STR1## where l is an integer having a value between 3 and 150, and m an integer ranging from 1 to 50, and where X may be H--, F--, CF.sub.3 --, C.sub.2 F.sub.5 --, C.sub.3 F.sub.7 --, CF.sub.3 --O--, C.sub.2 F.sub.5 O--, or C.

Abstract: Synthetic lubricants of the formula: ##STR1## wherein, n is from 3 to 10; X and X' are NH or NH.sub.2, with the proviso that X and X' are not both NH.sub.2 ; Rf and Rf' are Y(C.sub.3 F.sub.6 O).sub.l CFZCO, Y(C.sub.3 F.sub.6 O).sub.l (CF.sub.2 O).sub.m CFZCO, Y(C.sub.2 F.sub.4 O).sub.l (CF.sub.2 O).sub.m CFZO, Y(CF.sub.2).sub.l-1 CO, Y(CF.sub.2).sub.l- CH.sub.2 CO, and Y(CF.sub.2).sub.l-1 CH.sub.2 CH.sub.2 CO, wherein l>m, l is an integer from 3 to 150, m is an integer from 1 to 50, Y is H--, F--, CF.sub.3 --, C.sub.2 F.sub.5 --, C.sub.3 F.sub.7 --, CF.sub.3 O--, C.sub.2 F.sub.5 O--, or C.sub.3 F.sub.7 O--, and Z is F--, CF.sub.3 --, or C.sub.2 F.sub.5 --. The synthetic lubricants have enhanced adsorption on metals, graphite, amorphous carbon, and other inorganic materials, have improved corrosion protection and load resistance properties, a favorable lubricating behavior, and low combustibility.

Abstract: A synthetic lubricant comprising a compound represented by the following general formula (I): ##STR1## wherein Rf and Rf' represent a fluorine-containing polyoxyalkylene group, X and X' a polar group, Y of one or more selected from the group consisting of methylene, ethylene, propylene, oxygen, ketone, imino, sulfon and sulfur or no atom or group, and n an integer of 0 to 5, and a magnetic recording medium coated with this lubricant.

Abstract: A synthetic lubricant for lubricating a thin film containing a phosphonitrile ester obtained by cyclic polymerization or ring opening polymerization and represented by the following general formula (I): ##STR1## wherein n represents 3 to 10, and Rf and Rf' represent one or two groups selected from the following groups: ##STR2## wherein l represents 3 to 250, m 1 to 250, and Y one selected from the group consisting of F--, CF.sub.3 --, C.sub.2 F.sub.5 --, CF.sub.3 O--, C.sub.2 F.sub.5 O-- and C.sub.3 F.sub.7 O--; and a magnetic recording medium coated with this lubricant.