摘要:
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.
摘要:
New products having the structure of arylphosphines or of derivatives of arylphosphines with an oxygen or sulphur atom directly bonded to the phosphorus atom, containing perfluoroalkylether chains, characterized in that such chains are bonded to the benzene ring through a non-perfluorinated bridge, and are obtained by a process substantially decreasing their production costs, and suitable to be used as stabilizers of perfluoropolyether oils and greases to prevent their degradation in the presence of metals, and the corrosion of the same metals, such as, e.g., Al, Ti, V, or their alloys, when operating in oxidizing and high-temperature environments.
摘要:
Perfluoropolyethers having antirust properties, suitable for being used as lubricating oils or as components of lubricating greases or as antirust additives for lubricating oils and greases based on perfluoropolyethers.
摘要:
Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## and included in one of the following formulas: ##STR2## T'--O--(CF.sub.2 CF.sub.2 O).sub.p (CF.sub.2 O).sub.s --CRR'--Y(II) ##STR3## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I; R, R'=halogen atoms; Y=a functional group; o, q=numbers, zero included, such that o+q=1-20; n=a number ranging from 1 to 15; m/n=a number ranging from 0.01 to 0.5; p=a number ranging from 1 to 20; s/p=a number ranging from 0.5 to 2; and z/o+p=a number ranging from 0.01 to 0.05.
摘要翻译:具有官能团的含氟聚醚,其由选自以下的全氟聚氧化烯单元的随机分布的序列组成:并且包括在下列其中之一中:(I)T'-O-(CF 2 CF 2 O)p(CF 2 O) (II)其中X为F或CF 3 T,T',T“=含有1至3个碳原子和1或2个Cl,Br或I原子的全氟烷基 ; R,R'=卤素原子; Y =官能团; o,q =数字,包括零,使得o + q = 1-20; n = 1到15之间的数字; m / n = 0.01〜0.5的数; p = 1到20之间的数字; s / p =从0.5到2的数字; z + o + p = 0.01〜0.05的数。
摘要:
Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I;R, R'=halogen atoms;Y=a functional group;o, q=numbers, zero included, such that o+q=1-20;n=a number ranging from 1 to 15;m/n=a number ranging from 0.01 to 0.5;p=a number ranging from 1 to 20;s/p=a number ranging from 0.5 to 2; andz/o+p=a number ranging from 0.01 to 0.05.
摘要翻译:具有官能团的含氟聚醚,其由随机分布的全氟聚氧化烯单元序列组成,其选自:其中X为F或CF 3 T,T',T“=含有1至3个碳原子和1或2个Cl原子的全氟烷基,Br 或我; R,R'=卤素原子; Y =官能团; o,q =数字,包括零,使得o + q = 1-20; n = 1到15之间的数字; m / n = 0.01〜0.5的数; p = 1到20之间的数字; s / p =从0.5到2的数字; z + o + p = 0.01〜0.05的数。
摘要:
1. Dyestuffs for cyclic or straight polyfluoropolyoxyalkylenes, of general formula:Q[B--(A).sub.s ].sub.t (III)or[(Q).sub.s --B].sub.2 A (IV)where:Q=an organic group containing a chromophore group, free from free or salified sulphonic and/or carboxylic groups, and/or sulphon-amidic groups;A=a perfluorooxyalkylene chain, which is monovalent in formula (II) and divalent in formula (III);B=an organic at least divalent group;s, t=1 or 2, respectively.2. Compositions comprising cyclic or straight polyfluoropolyoxyalkylenes and at least a dyestuff of formula (III) or (IV) dissolved therein.
摘要:
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.
摘要翻译: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。
摘要:
Fluoropolyethers having functional groups, consisting of randomly distributed sequences of perfluoropolyoxyalkylene units selected from: ##STR1## and included in one of the following formulas: ##STR2## where X is F or CF.sub.3 T, T', T"=a perfluoroalkyl group containing from 1 to 3 carbon atoms and one or two atoms of Cl, Br or I;R, R'=halogen atoms;Y=a functional group;o, q=numbers, zero included, such that o+q=1-20;n=a number ranging from 1 to 15;m/n=a number ranging from 0.01 to 0.5;p=a number ranging from 1 to 20;s/p=a number ranging from 0.5 to 2; andz/o+p=a number ranging from 0.01 to 0.05.
摘要翻译:具有官能团的含氟聚醚,由选自以下的全氟聚氧化烯单元的随机分布序列组成:图像(I)T'O(CF 2 CF 2 O)p(CF 2 O)s CR R'Y(II)(III)其中 X是F或CF 3 T,T',T“=含有1至3个碳原子和1或2个Cl,Br或I原子的全氟烷基; R,R'=卤素原子; Y =官能团; o,q =数字,包括零,使得o + q = 1-20; n = 1到15之间的数字; m / n = 0.01〜0.5的数; p = 1到20之间的数字; s / p =从0.5到2的数字; z + o + p = 0.01〜0.05的数。
摘要:
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.
摘要翻译: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。
摘要:
The invention pertains to a process for the manufacture cola medical implant, said process comprising: reacting a mixture of non functional, monofunctional, and bifunctional perfluoropolyethers comprising hydroxyl terminal groups, wherein the average functionality is of at least 1.97 [mixture (M)] with suitable reactants for producing a thermoplastic elastomer; moulding the so-obtained thermoplastic elastomer for yielding at least a part of the medical implant. It has been surprisingly found that by using a mixture of perfluoropolyethers having high functionality, it is advantageously possible to manufacture, by moulding thermoplastic elastomers therefrom, medical implants which exhibit improved biocompatibility and which are submitted to reduced chemicals extraction by biological fluids.