摘要:
The invention pertains to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of at least one cyclic fluorocompound of the following formula (I):
wherein X 1 , X 2 , X 3 , equal or different from each other are independently selected among H, F, and C 1-6 (per)fluoroalkyl groups, optionally comprising one or more catenary or non-catenary oxygen atoms; L represents a bond or a divalent group; R F is a divalent fluorinated C 1-3 bridging group; Y is a hydrophilic function selected among anionic functionalities, cationic functionalities and non-ionic functionalities.
摘要翻译:本发明涉及一种制备含氟聚合物的方法,所述含氟聚合物包含一种或多种氟化单体的水乳液聚合,其中所述水乳液聚合在至少一种下式(I)的环状氟化合物的存在下进行:其中X 1, X 2,X 3彼此相同或不同,独立地选自H,F和C 1-6(全)氟烷基,任选地包含一个或多个悬链或非链状氧原子; L表示键或二价基团; R F是二价氟化C 1-3桥连基; Y是选自阴离子官能团,阳离子官能团和非离子官能团的亲水性功能。
摘要:
A process for obtaining vinyl compounds by dehalogenation of halofluorinated compounds having a linear, branched or cyclic structure, said halofluorinated compounds containing in the molecule at least one group:
wherein Y 1 and Y 2 , equal to or different from each other, are selected from Cl, Br, I; wherein the halofluorinated compounds are dehalogenated in the presence of a transition metal, or of transition metal couples, by operating in a biphasic system of solvents immiscible among each other, formed of a (per)fluorinated solvent and a dipolar aprotic or protic solvent (co-solvent), wherein the ratio moles co-solvent/equivalents of the halofluorinated compound ranges from 0.5 to 10, preferably from 0.5 to 5, still more preferably from 1 to 3.
摘要:
A process for obtaining vinyl compounds by dehalogenation of halofluorinated compounds having a linear, branched or cyclic structure, said halofluorinated compounds containing in the molecule at least one group:
wherein Y 1 and Y 2 , equal to or different from each other, are selected from Cl, Br, I; wherein the halofluorinated compounds are dehalogenated in the presence of a transition metal, or of transition metal couples, by operating in a biphasic system of solvents immiscible among each other, formed of a (per)fluorinated solvent and a dipolar aprotic or protic solvent (co-solvent), wherein the ratio moles co-solvent/equivalents of the halofluorinated compound ranges from 0.5 to 10, preferably from 0.5 to 5, still more preferably from 1 to 3.
摘要:
A process for obtaining vinyl compounds by dehalogenation of halofluorinated compounds with aromatic substituents, having formula:
T-Ar-(O) y -CFX'-CF 2 X" (I)
wherein: X'= F, Cl, Br, I; X"= Cl, Br, I; y = 0, 1; when y = 0 X'≠ F; T = H, -(O) Y -CFX'-CF 2 X", wherein y, X' and X" are as above; Ar is a monocyclic, bicyclic or tricyclic bivalent aromatic radical from 6 to 14 carbon atoms, optionally containing heteroatoms, or Ar is formed of two aromatic rings linked by a bivalent radical; said process characterized in that the halofluorinated compounds are dehalogenated in the presence of a transition metal, by operating in a biphasic system of solvents immiscible among each other, formed of a (per)fluorinated solvent and a dipolar aprotic or protic solvent (co-solvent), wherein the ratio moles co-solvent/equivalents of the halofluorinated compound with aromatic substituents ranges from 0.5 to 10.
摘要翻译:(I)其中:X'= F,Cl,Br,I; X为卤素取代基的卤代氟代化合物脱卤化得到乙烯基化合物的方法,其中X'= F,Cl,Br,I; X “= Cl,Br,I; y = 0,1; 当y = 0时X'≠F; T = H, - (O)Y-CFX'-CF 2 X“,其中y,X'和X”如上所述; Ar是6至14个碳原子的单环,二环或三环二价芳基,任选含有杂原子,或Ar由两个由二价基团连接的芳环形成; 所述方法的特征在于卤代氟化合物在过渡金属存在下脱卤化,通过在由(全)氟化溶剂和偶极非质子或质子溶剂(共溶剂)形成的彼此不互溶的溶剂的双相体系中操作 ),其中具有芳族取代基的卤代氟代化合物的摩尔共溶剂/当量的比例为0.5-10。