Abstract:
A self-acting air bearing operable at very high speed in a non-vertical spin axis in a beam scanning optical system provides precise rotation of a rotable hologon disk. Pretreatment of the bearing surfaces with a residual boundary lubricant allows reliable operation over an extended series of start/stop cycles. The tilt of the bearing/disk assembly allows the construction of an optical system more compact than in conventional hologon beam scanning systems.
Abstract:
Compounds which can be defined by the formula (I):CF.sub.3 --C.sub.n F.sub.2n --C.sub.m H.sub.2m --CH.sub.3 (I)wherein:n is a numeral comprised within the range of from 1 to 21;m is a numeral comprised within the range of from 3 to 25;n+m is a numeral equal to, or higher than, 18;with the chain of carbon atoms being either linear or branchedare used as agents affording sliding characteristics (ski-waxes) for skis, to be applied onto the ski sole, and/or to be incorporated inside the ski sole. A sliding composition is also disclosed, which contains a paraffinic wax and at least one compound with formula (I).
Abstract:
An iodine-containing compound consisting of at least two repeating units selected from the formulae:--(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a ----(CHClCF.sub.2 CF.sub.2 O).sub.b ----(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c ----(CHFCF.sub.2 CF.sub.2 O).sub.d ----(CFClCF.sub.2 CF.sub.2 O).sub.e ----(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f --wherein a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:2.ltoreq.a+b+c+d+e+f.ltoreq.200 and1.ltoreq.a+c+d+fand an iodine atom at at least one end of a molecule, which can provide a block copolymer which is useful as a grease.
Abstract translation:由至少两个选自下式的重复单元组成的含碘化合物: - (CH 2 CF 2 CF 2 O)a - (CHClCF 2 CF 2 O)b - (CCl 2 CF 2 CF 2 O)c - (CHFCF 2 CF 2 O)d - (CFClCF 2 CF 2 O)e - (CF 2 CF 2 CF 2 O )f-其中a,b,c,d,e和f各自为0或正整数,并且满足以下等式:2 = a + b + c + d + e + f = 200和1 < / = a + c + d + f和分子至少一端的碘原子,其可以提供可用作油脂的嵌段共聚物。
Abstract:
An antirust additive for lubricants based on perfluoropolyethers, comprising one of the fluoropolyether compounds having functionalized end groups selected from --CN, --CH.sub.2 NR.sub.1 R.sub.2 and ##STR1## and in particular a combination of these with small amounts of a fluoropolyether with acid end groups.
Abstract translation:一种用于基于全氟聚醚的润滑剂的防锈添加剂,其包含具有选自-CN,-CH 2 NR 1 R 2和的官能化端基的氟聚醚化合物之一,特别是这些与少量具有酸端基的含氟聚醚的组合。
Abstract:
There is provided a synthetic lubricant composition characterized by the presence therein of (a) a fluorinated polyether and (b) a minor amount of a soluble polyfluoro additive.
Abstract:
This invention relates to a method and composition for improving the corron resistance and anti-wear properties of synthetic lubricating oil greases comprising the addition to said greases of effective amounts of a chelated Schiff base derived from the condensation of approximately stoichiometic amounts of at least one aldehyde and a polyamine.
Abstract:
Lubricating compositions are provided which comprise from about 60 to about 80% by weight of at least one saturated dicarboxylic acid, and from about 20 to about 40% of a carrier for said dicarboxylic acid. The lubricating compositions are particularly well suited for use in metal-to-metal lubricating, and are particularly useful in automobile engine lubrication.
Abstract:
An iodine-containing compound consisting of at least two repeating units selected from the formulae:--(CH.sub.2 CF.sub.2 CF.sub.2 O).sub.a ----(CHClCF.sub.2 CF.sub.2 O).sub.b ----(CCl.sub.2 CF.sub.2 CF.sub.2 O).sub.c ----(CHFCF.sub.2 CF.sub.2 O).sub.d ----(CFClCF.sub.2 CF.sub.2 O).sub.e ----(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.f --wherein a, b, c, d, e and f are each 0 or a positive integer and satisfy the following equations:2.ltoreq.a+b+c+d+e+f.ltoreq.200 and1.ltoreq.a+c+d+fand an iodine atom at at least one end of a molecule, which can provide a block copolymer which is useful as a grease.
Abstract:
New lubricating greases, the oily component of which is perfluoropolyether or fluoropolyether derivative of formula R--O--Q--CFX--(Y).sub.n --Z, having a number average molecular weight ranging from 1,500 to 10,000.whereinR is perfluoroalkyl radical R.sub.F or Z(Y).sub.n)--CFX;Q is perfluoroalkylpolyether or fluoroalkylpolyether chain;X is F or CF.sub.3 ;Y is a linking divalent radical;n is zero or 1; andZ is a radical selected from --CH.sub.2 OH, --CH.sub.2 OR.sup.1, --COOR.sup.2, --CONR.sup.3 R.sup.4 etc. . . . or from particular radicals containing heteroatoms or particular aromatic radicals.
Abstract:
An extreme climate, semi-fluid lubricant comprising a homogeneous mixture of tri-(2-ethylhexyl) phosphate, about 30 percent to about 44 percent by weight, and the balance a grease comprising perfluorocarbon polymer is powder form suitable for use as a lubricant in combination with base oil and lubricant additives.