E.i. Dupont De Nemours and Company

The Chemours Company Fc, LLC

Alexander Borisovich Shtarov

Volodymyr B Pashovych

Jon Lee Howell

Peter Michael Murphy

Michael Joseph Michalczyk

Stephen James Getty

Charles Kenneth Taylor

Stephan James McLain

Romain Severac

Axel Hans-Joachim Herzog

Mark Allen Andrews

Brent Ryan Gonska

Hollis Thomas Warren

Joseph Norman Hockman

Pelin Hacarlioglu

Composition containing at least one fluorinated silane of the formula (I):(Rf)&#x2014;Y&#x2014;(SiQZ)&#x2003;&#x2003;(I)wherein: Rf represents monovalent Rf(OCF)&#x2014;(OCF)&#x2014;(OCF)&#x2014;(OCF)wherein a, b, c, and d independently represent an integer of from 3 to 200 inclusive, and the sum of a, b, c, and d is at least 1; Rf is fluorinated alkyl group, linear or branched, with 1-4 carbons; Y represents a polyvalent organic group, Q represents a hydrolyzable group, a hydroxyl group, or alkyloxy group and is capable of forming a siloxane bond with Si atoms located at the terminal of the molecular chain of formula (I) or other active sites of the treated surface, Z is a monovalent alkyl group, or hydrogen; p is 1 or 2, w is 2-14, p+w is 3 to 15, and k is from 1 to 3.

Polysilane compound containing perfluoro(poly)ether group

The present invention relates to aminosulfonate and aminocarboxylate compositions derived from a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine. The aminosulfonate and aminocarboxylate compositions are useful for many purposes including amphoteric surface-active agents and aqueous film forming foams in fire fighting applications.

Surfactant composition from polyfluoroalkylsulfonamido alkyl amines

A composition of formula I[Rf(CH)(O)]-Awherein

Fluorinated surfactants

A process to prepare fluorinated sulfobetaine compounds of formula (I)   

Process to produce fluorinated betaines

The present invention relates to a polyfluoroalkylsulfonamido alkyl halide intermediate. The invention also relates to the use of the aforementioned halide intermediate to prepare a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl) amine.

Polyfluoroalkylsulfonamido alkyl halide intermediate

The present invention relates to a mixture of polyfluoroalkylsulfonamido alkyl amines including at least one polyfluoroalkylsulfonamido alkyl amine and its analog, a di(polyfluoroalkylsulfonamido alkyl)amine. The invention also relates to polyfluoroalkylsulfonamido alkyl halide intermediate used to make the aforementioned mixture.

Mixture of polyfluoroalkylsulfonamido alkyl amines

Current methods for making polyfluorosulfonamido amines, which involve the use of a diamine reactant, provide low yields and produce an undesirable fluorine containing bis-sulfonamide by-product representing an economic loss. The bis-sulfonamide by-product is particularly undesirable because it shares very similar physical properties with the desired monoamine product thus making isolation of the desired polyfluorosulfonamido amine product difficult and costly. Furthermore, instead of the efficient incorporation of fluorine to make the desired polyfluorosulfonamido amine product, the bis-sulfonamide by-product constitutes a substantial loss of costly fluorinated starting material. The bis-sulfonamide by-product also constitutes an undesirable impurity that can worsen surfactancy, repellency, or other performance characteristics of the desired polyfluorosulfonamido amine product. The present invention provides a method of making a polyfluorosulfonamido amine without the production of a bis-sulfonamide by-product by reacting a polyfluoroalkylsulfonic compound with a monoamino amide rather than with a diamine reactant as in previously known methods.

Polyfluorosulfonamido amine and intermediate

A process for preparing fluorinated alkyl carboxylate esters comprises reaction of a silver carboxylate or silver carboxylate precursor, such as silver (I) iodide with a fluorinated alkyl iodide and a carboxylic acid. Preferably the fluorinated alkyl iodide has the general formula CF(CF)CHCHI, wherein n is an integer in the range of from 1 to 29 and the carboxylic acid is acetic acid, acrylic acid or methacrylic acid.

Process for preparing fluorinated alkyl carboxylate esters

VariousC andC carbon labeled compoundsR&#x2014;CF(U)(T)&#x2003;&#x2003;Formula 1A orR&#x2014;CFCF(U)(T)&#x2003;&#x2003;Formula 1Bwherein

Synthesis of carbon-labeled perfluoroalkyl compounds

A composition of formula I[Rf(CH2)m(O)n]x-Awherein

VariousC andC carbon labeled compoundsR&#x2014;CF(U)(T)Formula 1A orR&#x2014;CFCF(U)(T)Formula 1Bwherein

A process for reducing the level of perfluoroalkanoic acids, perfluoroalkanoic esters, and perfluoroalkyliodides in fluorinated alcohols comprising heating a fluorinated alcohol, or mixtures thereof, containing said acids, esters, or iodides to a temperature of at least 175&#xb0; C. in the presence of water and a base additive is disclosed.

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Wilmington, DE, United States of America

Alexander Borisovich Shtarov