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Fluoropolymers

Patents with Abstracts

*7/30/2012

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Patent Abstracts

8. 8,217,126 
Fluoroolefin monomers and copolymers thereof
 
Hung and Peng of DuPont, Delaware,  developed fluoroolefins of formula Rf--O--(CF2CF2).subn(CH2CF2)m--CH.dbd.CH2, wherein n is 1 or 2, m is 0 or 1 and Rf is a C1-C8 fluoroalkyl or fluoroalkoxy group. The fluoroolefins may be oxidized to manufacture fluorinated carboxylic acids. Also disclosed are fluoropolymers comprising copolymerized units of the fluoroolefins of the invention and at least one other fluoromonomer. (RDC 7/30/2012)

7. 8,217,121 
Aromatic hydrogenated polymers containing fluorine
 
Tonelli of Solvay Solexis S.p.A., Italy, developed hydrogenated polymers consisting of perfluoropolyether (PFPE) chains bonded to the aromatic rings to form sequences randomly distributed in the polymer structure, having the formula (I): (T1-CF2O--Rf2)n-T3 in which: n is an integer from 1 to 10; T1 is an aromatic group of the backbone of the hydrogenated polymer, or alternatively condensed aromatic groups; T3 may be equal to T1, or alternatively a functional group --COOH or --COF; Rf is a (per)fluoropolyoxyalkylene chain, in which the starting hydrogenated aromatic polymers are obtained by polycondensation, stepwise polyaddition or polyaddition of cyclic monomers in which the ring is formed by at least 3 atoms. (RDC 7/27/2012)

6. 8,193,308
Process for preparing fluorine-containing polymer and fluorine-containing polymer prepared by said preparation process
 
Irie, Nishimura and Fujisawa of Daikin Industries , Japan, developed a preparation of fluorine-containing polymer which can easily and efficiently separate a fluorine-containing polymer and water from an aqueous dispersion of a fluorine-containing polymer obtained by the mentioned preparation process.  Molded articles can be obtained by crosslinking a curable composition consisting of the fluoropolymer and a crosslinking agent. The process is based on a step for heat-treating an aqueous dispersion of a fluorine-containing polymer having a concentration of 3 to 70% by weight to obtain the fluorine-containing polymer having a water content of not more than 1% by weight. (RDC 6/27/2012)

5. 8,193,294 
Networks containing perfluorocarbon organosilicon hyperbranched polymers
 
Hu et al of the Michigan Molecular Institute, Michigan, developed hyperbranched copolymer networks containing hyperbranched copolymers that have perfluorocarbon and organosilicon entities that have high hydrophobicity, or high oleophobicity, or high thermal stability, or good adhesion to substrates, or any combinations thereof. This invention provides a further desirable combination of properties that include solubility before crosslinking, chemical resistance, and easy processibility. The copolymers may be crosslinked with a variety of crosslinking agents to give either rigid or elastomeric networks. (RDC 6/27/2012)

4. 8,192,677 
Core/shell polymer and fluoropolymer blending blow molding and blown film process
 
Aten, Libert and Burch of DuPont, Delaware, developed a process for extruding a partially crystalline melt-fabricable perfluoropolymers.  The process consists of blow molding from a perfluoropolymer having polytetrafluoroethylene sub-micrometer particles dispersed therein. The perfluoropolymer composition is a core/shell polymer, with pelletized blend, a dispersion blend or a melt-mixed polymer.  (RDC 6/18/2012)

3. 8,137,812 
Fluoropolymer and composition thereof
 
Kitahara et al of Daikin Industries, Japan, developed a fluoropolymer capable of giving fluorine-containing molded materials and laminates excellent in moldability, productivity, interlaminar bonding and stress cracking resistance, in particular stress cracking resistance upon contacting with various liquid chemicals, without impairing such characteristics intrinsic in fluororesins as chemical resistance, solvent resistance, weathering resistance, antifouling properties, liquid chemical impermeability and nonstickiness.  This fluoropolymer is an oligomer-containing or oligomer-free fluoropolymer, wherein said oligomer has a molecular weight not higher than 10,000 and amounts to not more than 0.05% by mass relative to the fluoropolymer.  (RDC 5/15/2012)

2. 8,132,748 
Method of making hydrophilic fluoropolymer material
 
Donckers, II; Nelson and Moon of Toray Fluorofibers, Alabama, increased the hydrophilicity of  fluoropolymer with a cryogenic grinding mill. (RDC 4/24/2012)

1. 8,132,747 
Method of making hydrophilic fluoropolymer material
 
Donckers, II, Nelson and Moon of Toray Fluorofibers, Alabama, increased  fluoropolymer with a jet mill. (RDC 4/24/2012)

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Roger D. Corneliussen
Editor
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 4/19/2012.