3m Innovative Properties Company

Arne Thaler

Klaus Hintzer

Kai Helmut Lochhaas

Gregg D Dahlke

Denis Duchesne

Markus E Hirschberg

Steven Joseph Hamrock

Tilman C Zipplies

Lisa P Chen

Michael Andrew Yandrasits

Joachim Zech

Thorsten Gerdes

Achim Schmidt-Rodenkirchen

Egon Obermaier

Konstantin Mierdel

Naiyong Jing

Tatsuo Fukushi

Werner Schwertfeger

Andreas R Maurer

Mark W Muggli

Michael C Dadalas

Sean M Smith

Wolfgang Weinmann

Hendrik M Grupp

Oleg Shyshkov

Christoph Schulte

Wolf Steiger

Matthew J Lindell

Franz Maerz

Tilman C Zipples

Thomas W Schoettle

The process produces a fluorinated olefin from a fluorinated copolymer having at least one of sulfonic acid groups, carboxylic acid groups, or salts thereof. The process includes heating the fluorinated copolymer at a first temperature not more than 450° C. to decompose at least one of the sulfonic acid groups, carboxylic acid groups, or salts thereof to form a partially pyrolyzed intermediate and subsequently heating the partially pyrolyzed intermediate at a second temperature of at least 550° C. to produce the fluorinated olefin.

Process of making fluoroolefins by thermal decomposition of fluorinated ionomers

The copolymer includes divalent units represented by formula —[CF—CF]—, at least one divalent unit represented by formula (I): and at least one divalent unit independently represented by formula (II): A is —N(RF)or a is non-aromatic, 5- to 8-membered, perfluorinated ring comprising one or two nitrogen atoms in the ring and optionally comprising at least one oxygen atom in the ring, each RFa is independently linear or branched perfluoroalkyl having 1 to 8 carbon atoms and optionally interrupted by at least one catenated O or N atom, each Y is independently —H or —F, with the proviso that one Y may be —CF, h is 0, 1, or 2, each i is independently 2 to 8, and j is 0, 1, or 2. A catalyst ink and polymer electrolyte membrane including the copolymer are also provided.

Fluorinated copolymer and compositions and articles including the same

Methods of converting a variety of fluorinated materials into anhydrous hydrogen fluoride are described. The methods include thermally decomposing the fluorinated materials into a gaseous effluent comprising hydrogen fluoride and carbon dioxide. This gaseous effluent is then treated with carbon at a temperature of at least 830° C., converting the carbon dioxide to carbon monoxide (CO) and producing a gaseous product comprising the hydrogen fluoride, which can be condensed to generate anhydrous hydrogen fluoride. These methods can also be used to convert water contained in the gaseous effluent into hydrogen.

Converting fluorinated materials into anhydrous hydrogen fluoride

The copolymer includes divalent units represented by formula &#x2014;[CF&#x2014;CF]&#x2014;, divalent units represented by formula; and one or more divalent units independently represented by formula: The copolymer has an &#x2014;SOX equivalent weight in a range from 300 to 2000. A polymer electrolyte membrane that includes the copolymer and a membrane electrode assembly that includes such a polymer electrolyte membrane are also provided.

Fluorinated copolymer having sulfonyl pendant groups and compositions and articles including the same

The copolymer includes divalent units represented by formula &#x2014;[CF&#x2014;CF]&#x2014;, divalent units represented by formula: (I), and one or more divalent units independently represented by formula: (II) When Z is hydrogen, the copolymer has an alpha transition temperature of up to 100 ?C. The copolymer has an &#x2014;SOZ equivalent weight in a range from 300 to 1400, and a variation of the copolymer in which &#x2014;SOZ is replaced with &#x2014;SOF has a melt flow index of up to 80 grams per ten minutes measured at a temperature of 265&#xb0; C. and at a support weight of 5 kg. A catalyst ink or polymer electrolyte membrane including the copolymer are also provided. 

A method of making a copolymer is disclosed. The method includes copolymerizing components including tetrafluoroethylene and a compound represented by formula CF&#x2550;CF&#x2014;O&#x2014;(CF)&#x2014;SOX, wherein 'a' is a number from 1 to 4, and X is &#x2014;NZH, &#x2014;NZ&#x2014;SO&#x2014;(CF)&#x2014;SOX', or &#x2014;OZ, wherein Z is independently a hydrogen, an alkali metal cation, or a quaternary ammonium cation, and wherein X&#x2032; is independently &#x2014;NZH or &#x2014;OZ. The components include at least 60 mole % of tetrafluoroethylene based on the total amount of components. A copolymer prepared by the method is also provided. A method of making a membrane using the copolymer is also provided. The present disclosure also provides a polymer electrolyte membrane that includes a copolymer made by the method and a membrane electrode assembly that includes such a polymer electrolyte membrane.

Method of making a copolymer of tetrafluoroethylene having sulfonyl pendant groups

The invention relates to a curable dental composition comprising a cationically hardenable compound (A) comprising at least two aziridine moieties, a starter (B) being suitable to cure the hardenable compound (A), polymeric particles as filler component (C), the polymeric particles having a maximum particle size of 150 &#x3bc;m or below and the component(s) the polymeric particles are made of being based on fluoropolymers comprising more than 99% monomer repeating units of tetra fluoro ethylene. The invention also relates to the use of such composition for producing a dental impression material or a dental retraction material.

Cationically curing dental composition containing polymeric particles and use thereof

Provided are processes for upconcentrating fluoropolymer dispersions. Also provided are upconcentrated dispersions and substrates coated with such dispersions.

Method for reducing fluorinated emulsifiers from aqueous fluoropolymer dispersions using sugar-based emulsifiers

Described herein are three methods for making halogenated fluorinated ether-containing compounds using a fluorinated olefin or hexafluoropropylene oxide.

Methods of making halogenated fluorinated ether-containing compounds

Described herein is a process for recovering a branched, ether-containing fluorinated emulsifier from an anion exchange resin by (1) contacting the anion exchange resin with a recovery fluid to form an eluate, the recovery fluid comprising an ammonium salt, water, and a water-miscible solvent, wherein the fluorinated emulsifier is of the formula: [Rf-(0-R'f)n-0-CF(CF3)-C(0)0-]i M+1; and (2) separating the anion exchange resin from the eluate.

Recovery of branched fluorinated emulsifiers

The invention relates to a radiation curable composition for taking a dental impression comprising (A) a cationically hardenable compound comprising at least one aziridine moiety, and (B) a radiation sensitive starter, the radiation sensitive starter comprising an onium salt, a ferrocenium salt, a combination or mixture thereof.

Radiation curable composition, process of production and use thereof

A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, as well as the polymer so made, the method comprising application of electron beam radiation to a highly fluorinated fluoropolymer comprising: a backbone derived in part from tetrafluoro-ethylene monomer, first pendent groups which include a group according to the formula &#x2014;SOX, where X is F, Cl, Br, OH or &#x2014;OM, where Mis a monovalent cation, and second pendent groups which include Br, Cl or I. Typically, the membrane has a thickness of 90 microns or less, more typically 60 or less, and most typically 30 microns or less.

Bromine, chlorine or iodine functional polymer electrolytes crosslinked by e-beam

A method is provided for aqueous emulsion co-polymerization of two or more fluoromonomers comprising the steps of: 1) forming an aqueous pre-emulsion by mixing a fluoromonomer according to formula I:FC&#x2550;CF&#x2014;R&#x2014;SOX&#x2003;&#x2003;(I)wherein Ris a branched or unbranched perfluoroalkyl, perfluoroalkoxy or perfluoroether group comprising 1&#x2013;15 carbon atoms and 0&#x2013;4 oxygen atoms and wherein X is F, Cl or Br, together with 0.001&#x2013;0.9 molar equivalents of a base, in the absence of added emulsifier; and 2) reacting the pre-emulsion with one or more perfluorinated comonomers in the absence of added emulsifier so as to form a fluoropolymer latex comprising a fluoropolymer wherein more than 1 mol % of monomer units are derived from the fluoromonomer according to formula I. In another aspect, the present invention provides a fluoropolymer derived from the fluoropolymer latex made according to the method of the present invention which is free of added emulsifier. In another aspect, the present invention provides a polymer electrolyte membrane comprising the fluoropolymer made according to the method of the present invention which is free of added emulsifier.

Growing community of inventors

Emmerting, Germany

Arne Thaler