摘要:
A poly-[1-4]-D-glucosamine derivative comprising [1-4]-D-glucosamine recurring units and comprising a fluoropolyether chain bound to the nitrogen atom in the C-2 position of at least one of the [1-4]-D-glucosamine recurring units.
摘要:
This invention pertains to fluoroallylsulfonyl azide compounds of formula: CF 2 =CF-CF 2 -O-R f -SO 2 N 3 formula (I) wherein R f is a divalent (per)fluorinated group, optionally comprising one or more than one ethereal oxygen atom [monomer (Az)], which are useful as functional monomers in fluoropolymers, to the fluoropolymers which comprise recurring units derived from such fluoroallylsulfonyl azide compounds, to a process for their manufacture, to a curable compound comprising the same and to a method for crosslinking the same.
摘要翻译:本发明涉及式(CF 2)CF 2 = CF-CF 2 -OR f -SO 2 N 3的氟烯丙基磺酰基叠氮化物,其中R f是二价(全)氟化的基团,任选地包含一个或多于一个醚氧原子 可用作含氟聚合物中的官能单体的[单体(Az)],包含衍生自这类氟烯丙基磺酰基叠氮化物化合物的重复单元的含氟聚合物,其制备方法,包含其的可固化化合物和交联方法 一样。
摘要:
A process for the dehydrochlorination of a chlorinated hydrocarbon comprising at least one chlorine atom and at least one hydrogen atom on vicinal carbon atoms to yield the corresponding unsaturated hydrocarbon, said process comprising contacting the chlorinated hydrocarbon with a guanidinium salt or its guanidine precursor.
摘要:
The present invention relates to crosslinkable compositions comprising vinylidene fluoride (VDF)/trifluoroethylene (TrFE) polymers and a fluorine-containing crosslinking agent of formula (A) [agent (Cz)]: {N 3 [S(O) g1 ] s1 } na -(R H ) nh -R f -(R' H ) nh' -{[S(O) g2 ] s2 N 3 } na' formula (A) wherein each of g1 and g2, equal to or different from each other, is 1 or 2, each of s1 and s2, equal to or different from each other, is 0 or 1, each of na and na' is independently zero or an integer of 1 to 3, provided that the sum na+na' is at least 2, each of R H and R' H , equal to or different from each other, is a C 1 -C 12 hydrocarbon group free of fluorine atoms, nh and nh', equal or different from each other are independently 0 or 1, and R f is selected from the group consisting of i) a C 3 -C 20 fluorocarbon group, possibly comprising one or more ethereal oxygen atoms, ii) an oligomer comprising copolymerized units of vinylidene fluoride and trifluoroethylene, to a process for the manufacture of said compositions, to a method for curing the same, and to the use of said copolymers in electrical and electronic devices.
摘要:
The invention pertains to certain hydro-fluorocompounds of the following formula (I): R f O-R H -O-(CH2) m -[CF(X)] n -COOX a wherein: - X a is H, a monovalent metal (preferably an alkaline metal) or an ammonium group of formula -N(R' n ) 4 , wherein each of R' n , equal to or different from each other, independently represents a hydrogen atom or a C 1-6 hydrocarbon group (preferably an alkyl group); - R f is a C 1 -C 6 (per)fluoroalkyl optionally comprising one or more catenary oxygen atoms, preferably R f is a group of formula R 'f -CH 2 -, wherein R' f is a C 1 -C 5 perfluorinated group, possibly comprising one or more ethereal oxygens, preferably a C 1 -C 3 perfluorinated group, possibly comprising one or more ethereal oxygens; - R H is a fluorine-free hydrocarbon group optionally comprising one or more catenary oxygen atoms; - X is F or CF 3 , preferably X is F; - m is 0 or 1; - n is 1 to 3, to a process for the manufacture of said hydro-fluorocompounds, to a method of making fluoropolymers in the presence of said hydro-fluorocompounds, and to fluoropolymer dispersions comprising said hydro-fluorocompound.
摘要:
A polymer [polymer (P)] comprising a plurality of (per)fluoropolyether (PFPE) segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers (P) having two end groups [groups (E)], each group (E) comprising a hydroxy or a leaving group, with the proviso that the hydrogenated (polytether segment (SH) is not a segment of formula —CH2OCH2 2 OCH2— is herein disclosed. Disclosed is also a method for the manufacture of polymer (P) and a polymer obtainable by full or partial fluorination of polymer (P). Polymer (P) and polymers obtainable therefrom by full or partial fluorination can be conveniently used in the manufacture of lubricant compositions or of compositions for imparting hydro-/oleo-repellence to substrates. Said polymers can also be used as intermediates for the manufacture of other polymers or block copolymers.
摘要:
Disclosed are mixtures containing: mono- and bi-functional polymers [polymers (P-A) and (P-B)] comprising a plurality of (per)fluoropolyether segments [segments (SRF)] joined together by hydrogenated (poly)ether segments [segments (SH)], said polymers having two ends, wherein one or both ends comprises a hydroxy or a leaving group; a non-functional polymer comprising a plurality of (per)fluoropolyether segments (S) joined together by hydrogenated (poly)ether segments (SB), with the proviso that the hydrogenated (poly)ether segments (SRF) are not segments of formula —CH2OCH2OCH2—. Disclosed are also monofunctional polymers (P-A) that can be isolated from such mixtures. Methods for the obtainment of the mixtures and for separating the polymers therein contained are also provided, as well as methods of using the mixtures or each polymer therein contained as intermediates or building blocks for the synthesis of other polymers or as ingredients of compositions.
摘要:
The present invention pertains to a process for the manufacture of a crosslinkable fluoropolynner, to said crosslinkable fluoropolynner and the crosslinked fluoropolynner obtainable therefrom, to a film comprising said crosslinkable fluoropolymer or said crosslinked fluoropolymer and to uses of said crosslinked fluoropolymer film in various applications.