Abstract:
METHOD AND COMPOSITION FOR APPLYING A COATING TO A METALLIC SURFACE WHEREIN THE SURFACE IS IMMERSED IN AN ACIDIC AQUEOUS COATING COMPOSITION COMPRISING PARTICLES OF RESIN DISPERSED IN THE COMPOSITION, FLUORIDE ION AND AN OXIDIZING AGENT (H202 OR DICHROMATE) AND WHEREIN THE WEIGHT OF COATING FORMED ON THE SURFACE CAN BE CONTROLLED BY THE TIME THE SURFACE IS IMMERSED IN THE COMPOSITION.
Abstract:
1,205,222. Organopolysiloxanes. GENERAL ELECTRIC CO. 28 Nov., 1967 [12 Dec., 1966], No. 54185/67. Heading C3T. [Also in Division C5] An organopolysiloxane or a mixture of organopolysiloxanes useful as lubricants have the formula or average general formula in which R is a higher alkyl radical (i.e. at least 8 carbon atoms), R 1 is a t-butyl-substituted hydroxyaryl radical; a + b = 5-40 and the ratio b to a + b = 0.005-0.05. R 1 may be selected from radicals: A composition may comprise a mixture of an organopolysiloxane: and a second organopolysiloxane of formula in which a = 5-40, c = 0-39, d = 1-40 and c+d=1-40. A composition in accordance with Formula I may also comprise a mixture of an organopolysiloxane of formula (B) (a= 5-10) and a cyclic polymer of formula in which e = 3 to 7. In a preferred polymer R is tetradecyl and R 1 has the formula of Formula II above. The organopolysiloxane(s) are liquids but may be compounded with a thickener, e.g. silica, to form a silicone grease. The polyorganosiloxanes may, for example, be prepared from a phenolic compound having t-butyl radicals in both meta-positions to the OH group by first replacing one of the t-butyl radicals with an allyl radical to give a compound R 1 CH 2 -CH = CH 2 (R 1 as previously defined) and reacting this compound with an organopolysiloxane containing Si-H linkages.
Abstract:
A lubricant composition comprises (A) a base fluid of water or mixture of (a) water and (b) from 10-200 parts by weight (per 100 parts by weight of water in the mixture) of an organic lubricant of (1) a silicon-free polyoxyalkylene compound, (2) a dialkyl ester of an aliphatic dicarboxylic acid, (3) a hydrocarbon lubricating oil, or (4) an ester of a polyhydric alcohol and a fatty acid; and (B) a copolymer comprising (a) at least one siloxane block comprising at least two siloxane units represented by the formula wherein R is a unsubstituted monovalent hydrocarbon radical, a substituted monovalent hydrocarbon radical containing halogen, cyano, amido, carbalkoxy, acyloxy, mercapto or nitro groups as substituents or divalent hydrocarbon radical, and b is 1, 2 or 3, said siloxane block having at least one divalent hydrocarbon radical represented by R, and (b) at least one polyoxyalkylene block comprising at least two oxyalkylene units that are represented by the formula [-R1O-], wherein R1 is an alkylene radical, each such siloxane block having a ratio of hydrocarbon radicals to silicon atoms of from 1:1 to 3:1, each such siloxane block being linked to each such polyoxyalkylene block via an Si-C bond by a divalent hydrocarbon radical represented by R, said copolymer containing from 5 to 95 parts by weight of siloxane blocks and from 5 to 95 parts by weight of oxyalkylene blocks per 100 parts by weight of the copolymer, and said copolymer being present in the composition in an amount from 0.2 to 10 parts by weight per 100 parts by weight of the base fluid. Many optional ingredients are specified.ALSO:A lubricant composition comprises (A) a base field of water, a mixture of (a) water and (b) from 10-200 parts by weight (per 100 parts by weight of water in the mixture) of an organic lubricant of: (1) a silicon-free polyoxyalkylene compound; (2) a dialkyl ester of an aliphatic dicarboxylic acid; (3) a hydrocarbon lubricating oil; or (4) an ester of a polyhydric alcohol and a fatty acid; and (B) a copolymer comprising (a) at least one siloxane block comprising at least two siloxane units represented by the formula , wherein R is an unsubstituted monovalent hydrocarbon radical, a substituted monovalent hydrocarbon radical containing halogen, cyano, amido, carbalkoxy, acyloxy, mercapto or nitro groups as substituents, or a divalent hydrocarbon radical; and b is 1, 2 or 3, said siloxane block having at least one divalent hydrocarbon radical represented by R; and (b) at least one polyoxyalkylene block comprising at least two oxyalkylene units that are represented by the formula [-R1O-] wherein R1 is an alkylene radical, each such siloxane block having a ratio of hydrocarbon radicals to silicon atoms of from 1:1 to 3:1, each such siloxane block being linked to each such polyoxyalkylene block via an Si-C bond by a divalent hydrocarbon radical represented by R, said copolymer containing from 5 to 95 parts by weight of siloxane blocks and from 5 to 95 parts by weight of oxyalkylene blocks per 100 parts by weight of the copolymer, and said copolymer being present in the composition in an amount from 0.2 to 10 parts by weight per 100 parts by weight of the base fluid.
Abstract:
A lubricant composition consists of 40-85% of a dry lubricant and 15-60% of a condensation product of (a) 40-95% of an aromatic epoxy resin and (b) 5-60% of an organosilicon compound of formula where each R is a monovalent aromatic hydrocarbon radical or an alkyl radical containing less than 7 carbon atoms, R1 is -OH or a hydrolysable radical, n has an average value of 0.8-3, m has an average value of 0.1-3.2 and m + n is not greater than 4. Dry lubricants specified are molybdenum disulphide, graphite, antimony trioxide, titanium disulphide, tungsten disulphide, bismuth, lead sulphide, lead oxide, polytetrafluoroethylene, magnesium oxide, boron nitride, calcium fluoride, zirconium disulphide, colloidal silver and mixtures thereof. The composition may be dispersed or dissolved in a solvent, applied to a metal surface and cured at 100-200 DEG C. The composition may also contain fatty acids.