E.i. Dupont De Nemours and Company

Ramot University Authority for Applied Research and Industrial Development Limited

Icl Industries Ltd.

Shlomo Rozen

Ming-Hong Hung

Andrew Edward Feiring

Emanuel Peled

Frank J Weigert

William J Middleton

Richard Beckerbauer

David Kelrich

Israel Reshef

Ori Lerman

Herzel Yamin

Epoxides containing a perfluorovinyl group, and polymers made therefrom by polymerization of the epoxy function are disclosed. Such epoxides form polymers and copolymers useful for coatings, adhesion control agents, surface modifiers and crosslinking agents.

Epoxides containing a perfluorovinyl group

Disclosed herein are partially fluorinated (co)polymers containing sulfonic acid or sulfonate salt groups, processes for making those polymers, and intermediates for those (co)polymers. The (co)polymers are useful as ion-exchange resins and (in the sulfonic acid form) acid catalysts.

Fluorinated ion-exchange polymers and intermediates therefor

Disclosed herein is a process for making perfluoro(alkyl vinyl ethers) by fluorination with elemental fluorine of selected novel partially fluorinated (di) chloroethyl ethers, followed by dehalogenation to the corresponding perfluoro(alkyl vinyl ether). The perfluoro(alkyl vinyl ethers) are useful as monomers for molding resins and elastomers.

Production of perfluoro(alkyl vinyl ethers)

Disclosed herein is a process for making perfluoro(alkyl vinyl ethers) by fluorination with elemental fluorine of selected novel partially fluorinated (di)chloroethyl ethers, followed by dehalogenation to the corresponding perfluoro(alkyl vinyl ether). The perfluoro(alkyl vinyl ethers) are useful as monomers for molding resins and elastomers.

The compound, 1,1,1,2,2,3,3,4,4,5,6-undecafluorohexane, and mixtures thereof with alcohols, ethers, esters, ketones, nitromethane, and halogenated hydrocarbons are disclosed; as is the use thereof for cleaning a solid surface by treating the surface with said compound or said mixtures.

1,1,1,2,2,3,3,4,4,5,6-undecafluorohexane and use thereof in compositions

The present invention concerns novel dioxolane containing fluoroepoxides that are useful as curing materials, adhesives lubricants and coatings.

Dioxolane-containing fluoroepoxides

A process for production of fluorinated sulfones from fluorinated organic sulfides by oxidation of the sulfides with an oxidizing reagent made from fluorine, water and acetonitrile. The sulfones are useful as second order nonlinear optical dyes.

Oxidation of fluorine containing sulfides to sulfones

A method for the bromination of aromatic compounds, including substituted deactivated aromatic compounds, at mild temperature conditions is disclosed. The method comprises reacting an aromatic compound with a bromination agent consisting of bromine-trifluoride and bromine at a temperature ranging between -10.degree. C. and 30.degree. C. The bromination reaction takes place instantaneously and the brominated aromatic compound is separated from the original reactant by known organic chemistry techniques.

Method for the bromination of aromatic compound

Method and apparatus for determining the state-of-charge of batteries, particularly lithium batteries, involves the steps of: (a) measuring the temperature of the battery; (b) loading the battery to produce a high discharge for a short period of time; (c) after a short rest period, measuring the open-circuit-voltage of the battery; and (d) determining from the measured temperature and open-circuit-voltage the residual state-of-charge of the battery. Preferably, the residual state-of-charge of the battery is determined by comparing the measured temperature and open-circuit-voltage with reference tables showing the state-of-charge at different temperatures and open-circuit-voltages for the respective battery.

Method and apparatus for determining the state-of-charge of batteries

There is disclosed a solution of at least one fluoroxy compound, wherein said solution has a fluoroxy compound concentration of at least 0.5 meq/liter; said concentration containing about 35 to 100% of an acyl hypofluorite, based on the total number of equivalents of fluoroxy compounds present. The acyl hypofluorite has the formula X(CF.sub.2).sub.n COOF wherein X is H or F and n is 5 to 16. The solution is prepared by treating a suspension of a corresponding specified alkali salt with excess F.sub.2, and is useful as a selective fluorinating agent.

Growing community of inventors

Tel Aviv, Israel

Shlomo Rozen