Solvay (societe Anonyme)

E.i. Dupont De Nemours and Company

E. I. Du Pont De Nemours

Romain Severac

Bernard Boutevin

Vincent Bodart

Patrick Lacroix-Desmazes

Vincent Kurowski

Martial Jean-Jacques Pabon

Lamia Heuze

Sheng Peng

Peter Michael Murphy

Stephen James Getty

Alexander Borisovich Shtarov

Charles Kenneth Taylor

Hsu-Nan Huang

Christophe Fringant

Hollis Thomas Warren

Yves Hervaud

Emmanuel Abel Jean-Mark Puchois

Matthieu Perdon

Isabelle Deguerry

Berengere Rixens

Guillaume Gamblin

Renaud Laloux-Walther

Agnes Ibos

Emmanuel Abel Puchois

Various fluoropolymers have been proposed for imparting oil and water repellency to leather. Commonly, these fluoropolymers are amphiphilic; i.e., they are made from at least one monomer which is hydrophobic and at least one monomer which is hydrophilic. The present invention identifies and remedies disadvantages associated with the ability of amphiphilic fluoropolymers to impart oil and water repellency to leather. Contrary to conventional thinking, it has now been discovered that the incorporation of hydrophilic groups in a fluoropolymer undesirably reduces its ability to impart water resistance to leather. Correspondingly, it has also been discovered that a fluoropolymer incorporating fewer or no hydrophilic groups imparts superior oil and water repellency to leather when compared to fluoropolymers incorporating more hydrophilic groups. Therefore, this invention provides fluoropolymers which incorporate reduced levels of hydrophilic groups.

Fluoropolymer

It has been discovered by in present invention that, compared with a fluorosurfactant having only one betaine group per molecule, a fluorosurfactant having a plurality of betaine groups per molecule is superior in its ability to undergo electrostatic interaction with other components of a fire fighting composition thereby improving the performance of the fire fighting composition. Previously known fluorosurfactants comprise only one betaine group per molecule. In contrast, the present invention provides for a fluorobetaine copolymer containing a plurality of betaine groups.

Fluorobetaine copolymer and fire fighting foam concentrates therefrom

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

Process to produce fluorinated betaines

Polymer composition comprising: 1) a polymer (P1) comprising at least 50% by weight of monomeric units derived from an ethylenically unsaturated monomer (M1), and 2) at least one co-oligomer (O1) comprising at least: a) a component (A) comprising at least one monomeric unit identical to that derived from the monomer (M1) on which the polymer (P1) is based, and b) a component (B) comprising at least one monomeric unit (m2), derived from an ethylenically unsaturated monomer, carrying at least one group chosen from the following groups: &#x2014;CHwith a between 6 and 30; &#x2014;(CH)&#x2014;CFwith b between 1 and 11 and c greater than or equal to 5; &#x2014;(CH)&#x2014;(Si(CH)&#x2014;O)&#x2014;Si(CH)with d between 1 and 11 and e between 1 and 1000; &#x2014;COOH; &#x2014;SOH, and the phosphonate groups &#x2014;PO(OH)(OR) with Rbeing a hydrogen atom or an alkyl radical containing from 1 to 11 carbon atoms.

Polymer composition

Fluorinated amphoteric surfactants

Process for preparing one or more iodinated organic substances having a molecular mass of less than 2000 (substances (S)) using (A) at least one free-radical-generating substance chosen from peroxides, diazo compounds, dialkyldiphenylalkanes, substances derived from tetraphenylethane, boranes and iniferter substances comprising at least one thiuram disulphide group, (B) an ethylenically unsaturated substance capable of adding a free radical to its ethylenic double bond, (C) molecular iodine, which comprises the steps according to which at least a fraction of (A), at least a fraction of (B) and at least a fraction of (C) are introduced into a reactor, and then the contents of the reactor are caused to react, while introducing therein the possible remainder of (A), the possible remainder of (B) and the possible remainder of (C), until a moment is reached when the content of the reactor is a mixture comprising one or more substances (S). Iodinated organic substances for whose preparation the abovementioned process is particularly well suited.

Iodinated organic substances of low molecular mass and process for preparing them

A method of imparting oil repellency to flexible, fibrous, nonwoven substrates comprising contacting the substrate with an amphoteric fluorochemical copolymer composition prepared from polymerization of monomers in the following percentages by weight: (a) from about 60% to about 90% of a fluorinated (meth)acrylate monomer of Formula 1 which is R-Q-CO&#x2014;CR&#x2550;CH, (b) from about 10% to about 25% of an amine substituted (meth)acrylate or (meth)acylamide monomer of Formula 2 which is CH&#x2550;C(R)COZ(CH)q(CHR)NRR, and (c) from about 1% to about 15% of a substituted (meth)acrylic acid monomer of Formula 3 which is CH=CR(R)&#x2014;COOH.

Amphoteric fluorochemicals for paper

A composition useful to provide oil repellency, water repellency, and stain resistance to substrates comprising a polymer prepared by contacting a polyfluoroalkyl sulfonyl halide with a compound of Formula II, III or IV(E-(O))Si&#x2014;O&#x2014;(Si(R)&#x2014;O)&#x2014;[Si(R&#x2014;NHR)(R)O]&#x2014;Si&#x2014;((O)-E)&#x2003;&#x2003;Formula IIHRN&#x2014;R&#x2014;Si(R)&#x2014;O&#x2014;[Si(R)&#x2014;O]&#x2014;[Si(R&#x2014;NHR)(R)O]&#x2014;Si(R)&#x2014;R&#x2014;NHR&#x2003;&#x2003;Formula IIIHRN&#x2014;R&#x2014;Si(R)&#x2014;O&#x2014;[Si(R)&#x2014;O]&#x2014;Si&#x2014;((O)-E)&#x2003;&#x2003;Formula IVwherein

Fluorocarbon-grafted polysiloxanes

Radical polymerization process for the preparation of halogenated polymers employing one or more ethylenically unsaturated monomers, at least one of which is chosen from halogenated monomers, molecular iodine and one or more radical-generating agents chosen from diazo compounds, peroxides and dialkyl diphenylalkanes Radical polymerization process for the preparation, starting from the halogenated polymers prepared by the process as described above, of block copolymers, at least one block of which is a halogenated polymer block. Halogenated polymers which have a number-average molecular mass Mn of greater than 1.0&#xd7;10and an Mz/Mw ratio of less than 1.65. Block copolymers, at least one block of which is a block of halogenated polymer identical to the halogenated polymers described above. Block copolymers comprising at least one halogenated polymer block which have a number-average molecular mass Mn of greater than 1.5&#xd7;10and a polydispersity index Mw/Mn of less than 1.60.

Radical polymerization processes for preparing halogenated polymers, and halogenated polymers

Radical polymerization process for the preparation of halogenated polymers and block copolymers. Halogenated polymers and block copolymers.

Radical polymerization methods and halogenated polymers

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Grabels, France

Romain Severac