Abstract:
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.
Abstract:
The present invention pertains to a process for the manufacture of a grafted fluoropolymer [polymer (Fg)], said process comprising reacting: A) at least one fluoropolymer comprising at least one functional group selected from the group consisting of a hydroxyl group and a carboxylic acid group [polymer (F)], B) at least one polyoxyalkylene (POA) of formula (I): R B -(CH 2 -O) x -(CH 2 CHR A O) n -(CH 2 -O) x' -R C , wherein at least one of R B and R C is a reactive group comprising at least one heteroatom selected from oxygen and nitrogen different from the hydroxyl group, the remaining, if any, being a -[O] z -CH 3 alkyl group, wherein z is 0 or 1, R A is a hydrogen atom or a C 1 -C 5 alkyl group, x and x', equal to or different from each other, are independently 0 or 1, and n is an integer comprised between 2 and 1000, preferably between 5 and 200, C) optionally, in the presence of at least one catalyst, and D) optionally, in the presence of at least one organic solvent (S). The present invention also pertains to grafted fluoropolymers obtained from said process and to uses of said grafted fluoropolymers for manufacturing porous membranes.
Abstract:
The present invention pertains to semi-crystalline fluoropolymer [polymer (F)] comprising: - recurring units derived from vinylidene fluoride (VDF); - from 10% to 50% by moles [with respect to the total moles of recurring units of polymer (F)] of recurring units derived from trifluoroethylene (TrFE); and - from 0.01 % to 10% by moles [with respect to the total moles of recurring units of polymer (F)] of recurring units derived from at least one monomer comprising an azide group [monomer (Az)], to a process for its manufacture, to a crosslinkable composition comprising the same, to a process for crossliking the same and to a method for manufacturing one of electrical and electronic devices using the same.
Abstract:
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.
Abstract:
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.
Abstract:
Disclosed are mixtures containing: mono- and bi-functional polymers [polymers (P-A) and (P-B)] comprising a plurality of (per)fluoropolyether segments [segments (S RF )] joined together by hydrogenated (poly)ether segments [segments (S H )], 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 RF ) joined together by hydrogenated (poly)ether segments (S H ), with the proviso that the hydrogenated (poly)ether segments (S H ) are not segments of formula -CH 2 OCH 2 OCH 2 -. 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.
Abstract:
The present invention relates to thermoplastic polyamides (PA) comprising recurring units derived from a PFPE dicarboxylic acid (PFPA-DA) or a PFPE diamine (PFPE-NN) in a defined weight amount with respect to other units derived from the other monomers used in the course of polymerization. Polyamides (PA) are endowed with improved surface properties, chemical resistance and reduced brittleness and do not require the addiction of impact modifiers.
Abstract:
A process is provided for the preparation of difluoroacetic acid from tetrafluoroethylene. The process comprises reacting tetrafluoroethylene with an aqueous solution of an inorganic base, optionally in the presence of an organic solvent.
Abstract:
A polymer [polymer (P)] comprising a plurality of (per)fluoropolyether (PFPE) segments [segments (S RF )] joined together by hydrogenated (poly)ether segments [segments (S H )], 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 (poly)ether segment (S H ) is not a segment of formula -CH 2 OCH 2 OCH 2 - 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.
Abstract translation:包含由氢化(多)醚链段[SHS]连接在一起的多个(全)氟聚醚(PFPE)链段[链段(SRF)]]的聚合物[聚合物(P)]],所述聚合物(P) 基团(基团(E)],每个基团(E)包含羟基或离去基团,条件是氢化(聚)醚链段(SH)不是式-CH 2 OCH 2 OCH 2 - 的链段。 还公开了制备聚合物(P)的方法和通过聚合物(P)的全部或部分氟化获得的聚合物。 聚合物(P)和通过全部或部分氟化获得的聚合物可以方便地用于制备润滑剂组合物或用于赋予基材的氢/疏油性的组合物。 所述聚合物也可用作制备其它聚合物或嵌段共聚物的中间体。
Abstract:
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.