公开(公告)号：US4016217A

公开(公告)日：1977-04-05

申请号：US571770

申请日：1975-04-25

申请人： Harold Crosbie Fielding ,  Alfred John Rudge

发明人： Harold Crosbie Fielding ,  Alfred John Rudge

IPC分类号： C07C17/281 ,  C07C17/26 ,  C07C19/08

CPC分类号： C07C17/281

摘要： A process for making branched, internally-unsaturated liquid perfluoroolefins that are oligomers of tetrafluoroethylene and have an empirical formula (C.sub.2 F.sub.4).sub.n where n is an integer of 4 to 7, comprising contacting tetrafluoroethylene under anhydrous conditions with at least one fluoride which is a source of fluoride ions, said fluoride being selected from the group consisting of the normal fluorides, acid fluorides and fluorosulphinates of the metals potassium, rubidium and caesium and normal fluorides of a tetraalkylammonium ion, at a temperature of 20.degree. C to 170.degree. C in the presence of an inert solvent selected from the group consisting of dimethylformamide, dimethyl sulphoxide, N-methyl pyrrolidone and hexamethylphosphoramide, and recovering said branched, internally-unsaturated liquid perfluoroolefins from the reaction medium.

摘要翻译： 制备作为四氟乙烯的低聚物并具有经验式（C 2 F 4）n的支化的，内部不饱和的液体全氟烯烃的方法，其中n为4-7的整数，包括在无水条件下使四氟乙烯与至少一种氟化物 的氟化物离子，所述氟化物选自金属钾，铷和铯的正氟化物，酸式氟化物和氟代亚磺酸盐和四烷基铵离子的正常氟化物，在20℃至170℃的温度下 存在选自二甲基甲酰胺，二甲基亚砜，N-甲基吡咯烷酮和六甲基磷酰胺的惰性溶剂，并从反应介质中回收所述支链内部不饱和的液体全氟烯烃。

公开(公告)号：US4020903A

公开(公告)日：1977-05-03

申请号：US667013

申请日：1976-03-15

申请人： Harold Crosbie Fielding ,  John Hutchinson ,  Samuel John Webster

发明人： Harold Crosbie Fielding ,  John Hutchinson ,  Samuel John Webster

IPC分类号： A62D1/02 ,  A62B1/12

CPC分类号： A62D1/0085

摘要： A method of fighting fires which comprises applying to the fire a foam produced from an aqueous composition comprising as a surface-active agent the residue of a branched oligomer of tetrafluoroethylene (C.sub.2 F.sub.4).sub.n wherein n is 4, 5, or 6 having a hydrophilic group attached to the residue of the oligomer, said oligomer having at least three CF.sub.3 groups and being characterized by a formula selected from the group consisting of: ##STR1## The surfactants are particularly effective when incorporated in foams derived from other foam-producing materials.

摘要翻译： 一种扑灭火灾的方法，其特征在于，将由含有作为表面活性剂的含水组合物产生的泡沫体施加到火焰上，残留物为四氟乙烯（C 2 F 4）n的支化低聚物，其中n为4,5或6，具有亲水基团 所述低聚物具有至少三个CF 3基团，并且其特征在于选自以下的式：所述表面活性剂在加入到所述低聚物的残基中时特别有效 衍生自其他发泡材料的泡沫。