摘要:
Perfluorocarbonyl compounds of the formulae IV and V ##STR1## in which R.sub.f denotes perfluoroalkyl, R'.sub.f denotes perfluoroalkylene, R denotes F, Cl, perfluoroalkyl or --OR"' (R"'=alkyl, aryl or aralkyl) and n denotes a number from 0 to 10, are prepared, starting from compounds of the formula I ##STR2## in which R.sub.f, R'.sub.f and n have the same meaning as in the formulae IV and V and R" is F, Cl or perfluoroalkyl, by electrolysis in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate and, if necessary, esterification with R"'OH, and decomposition ##STR3## in the presence of catalytic amounts of alkali metal fluorides and/or aprotic N-bases. Most of the compounds IV and V are new; the latter are, above all, valuable heat transfer fluids, lubricating oils or intermediates for the preparation of other F-organic compounds.
摘要:
The present invention relates to novel .omega.-fluorosulfato-perfluorocarboxylic acid derivatives of the formula I ##STR1## in which A denotes halogen, preferably Cl or F, and in particular F, or the group OR wherein R is alkyl, aryl or aralkyl with preferably up to 10 C atoms, in particular CH.sub.3 or C.sub.2 H.sub.5, m denotes a number from 1 to 10, preferably from 1 to 8 and in particular from 1 to 6, and n denotes a number from 0 to 10, preferably from 0 to 4 and in particular 0 or 1, which are prepared by electrolysis of .omega.-H-perfluorocarboxylic acid halides of the formula II ##STR2## in which A'=halogen and m and n have the same meaning as in formula I, in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate, the compounds of the formula III being formed: ##STR3## in which A' has the same meaning as in formula II and m and n have the same meaning as in formulae I and II, these compounds then also being esterified with an organic hydroxy compound of the formula IVROH (IV)in which R has the meaning given in the case of formula I, to give compounds I in which A=OR.The compounds of the present invention are valuable intermediate products particularly suitable for the preparation of perfluorinated vinyl compounds with an additional functional group wherein the vinyl compounds can in turn be processed to valuable oligomers and polymers which are very stable to heat and chemicals and can be used in many ways.
摘要翻译:本发明涉及式I(I)的新型ω-氟磺酸 - 全氟羧酸衍生物,其中A表示卤素,优选Cl或F,特别是F,或OR基团,其中R是烷基,芳基或 优选至多10个C原子的芳烷基,特别是CH 3或C 2 H 5,m表示1至10,优选1至8,特别是1至6的数,n表示0至10的数,优选0 至4,特别是0或1,其通过电解其中A'=卤素和m和n具有与式I中相同含义的式IIA(II)的ω-H-全氟羧酸酰卤制备 在由氟磺酸/碱金属氟代磺酸盐组成的电解质中,形成式III的化合物:其中A'具有与式II相同的含义,m和n具有与下式相同的含义: 通式I和II,然后这些化合物也与有机羟基化合物进行酯化 R IV(R)其中R具有式I给出的含义,得到其中A = OR的化合物I。 本发明的化合物是有价值的中间产品,特别适用于制备具有附加官能团的全氟化乙烯基化合物,其中乙烯基化合物又可加工成对热和化学品非常稳定的有价值的低聚物和聚合物,并且可以使用 在许多方面。
摘要:
A perfluorocarbonyl compound of the formula ##STR1## wherein R.sub.f is perfluoroalkyl having 1 to 10 carbon atoms,R'.sub.f is perfluoroalkylene having 1 to 10 carbon atoms,R is fluorine, chlorine, perfluoroalkyl having 1 to 10 carbon atoms, or is alkoxy having 1 to 10 carbon atoms, andn is 0 to 10.
摘要:
Substantially non-crosslinked fluorocarbon polymers containing carboxyl groups are prepared starting from non-crosslinked and in some cases new, fluorocarbon polymers in which the linear macromolecules carry side chains containing the end group --CHFX (X is F or CF.sub.3). The starting polymers are first reacted with peroxodisulfuryl difluoride FSO.sub.2 O--OSO.sub.2 F to give the corresponding fluorosulfato derivatives containing the side chain end groups. ##STR1## In the event that X is F, these derivaties are then converted into the corresponding carboalkoxy derivatives by means of an alcohol, the fluorosulfato group being split off, and these carboalkoxy derivatives are then converted by saponification into the products containing the free carboxyl groups; the fluorosulfato derivatives can also be hydrolyzed with water, if appropriate in the presence of an inert solvent and/or bases, to give, without further treatment, the products containing the free carboxyl groups.The fluorosulfato derivatives in which X is CF.sub.3 in the side chain end groups are first decomposed in the presence of catalytic amounts of alkali metal fluorides and/or aprotic nitrogen bases to give the products containing the side chain end groups ##STR2## and the latter are then hydrolyzed to give the products containing the free carboxyl group.Virtually non-crosslinked fluorocarbon polymers containing carboxyl groups are of industrial importance in the form of cation exchanger membranes in electrolytic cells, particularly in chlor-alkali electrolysis.
摘要:
Omega-fluorosulfato-perfluoro-(2-methyl-alkan-3-ones) of the formula ##STR1## which are intermediates in the preparation of perfluoro-isopropylketocarboxylic acid fluorides from omega-hydro-perfluoro-(2-methyl-alkan-3-ones).
摘要:
A fluorosulfatoperfluoroalkanesulfonic acid halide of the formula ##STR1## wherein R.sub.f is F or perfluoroalkyl having 1-10 carbon atoms, X is Cl or F, and n is a number from 0 to 7.
摘要:
Compounds represented by formula (Rf-Q-X)s—Z. Each Rf is independently a partially fluorinated or fully fluorinated group selected from Rfa-(O)r—CHF—(CF2)n—; [Rfb-(O)tC(L)H—CF2—O]m—W—; CF3CFH—O—(CF2)p—; CF3—(O—CF2)z—; and CF3—O—(CF2)3—O—CF2—. Methods of reducing surface tension of a liquid, making foams, and treating a surface using the compounds are also disclosed.
摘要:
A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO−]iXi+ (I) wherein L represents a linear fully fluorinated alkylene group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.
摘要翻译:首先提供含氟聚合物颗粒和一种或多种选自氟化羧酸或其盐的含氟表面活性剂的含氟聚合物分散体的制备方法,所述含氟聚合物分散体具有以下通式:[Rf-OL-COO-] iXi +(I)其中L表示 线性全氟化亚烷基,Rf表示直链部分或完全氟化的脂族基团或被一个氧原子间隔的直链部分或全氟化的脂族基团,X i +表示i为i且i为1,2或3的阳离子; 然后加入一种或多种选自阴离子和非离子表面活性剂的非氟化表面活性剂,然后将一种或多种氟化表面活性剂的总量减少至不超过500ppm,例如不超过250ppm,基于 分散体的总重量,同时保持或增加分散体中固体的量。
摘要:
Method of making fluoropolymers by emulsion polymerization of one or more fluorinated monomers in an aqueous phase in the presence of a fluorinated emulsifier, said method comprises adding a doping agent in a weight ratio with respect to the emulsifier of from about 1:2 to about 1:20, said doping agent has a melting point of equal or less than 30° C. and a boiling point of at least about 100° C. and is selected from the group consisting of fluorinated cyclic hydrocarbons, fluorinated polyoxyalkenes, fluorinated alkenes and fluorinated polyoxyalkenes.
摘要:
The invention provides a fluorinated surfactant having the general formula: [Rf—(O)t—CHF—(CF2)n—COO—]iXi+ (I) wherein Rf represents a partially or fully fluorinated aliphatic group optionally interrupted with one or more oxygen atoms, t is 0 or 1 and n is 0 or 1, Xi+ represents a cation having a valence i and i is 1, 2 or 3. The surfactant can be used in emulsion polymerization of fluoromonomers to prepare fluoropolymers.
摘要翻译:本发明提供具有以下通式的氟化表面活性剂:[Rf-(O)t-CHF-(CF 2)n -CO 2 - ] i X i +(I)其中R f表示部分或完全氟化的脂族基团,任选被一个或多个氧 原子,t为0或1,n为0或1,Xi +表示i为i且i为1,2或3的阳离子。表面活性剂可用于含氟单体的乳液聚合以制备含氟聚合物。