Fluorinated Polymers
"Fluorinated polymers show increased solubility in organic solvents, lower dielectric constant and water uptake, higher thermal and thermooxidative stability, better optical transparencies along with higher gas-permeability and flame resistance as compared to their non-fluorinated counterparts. Putting trifluoromethyl (–CF3) groups into polymers has been one of the most widely used strategies for structural modification leading to substantial property enhancement."
"High-performance polymers, e.g., poly(arylene ether)s and aromatic polyimides containing –CF3 substituents have been shown to possess a combination of excellent thermal, mechanical, solubility, processability, optical and electrical properties, rendering them suitable for a wide range of applications, e.g., as low-dielectric materials, in optical devices, as well as membranes for gas and solvent separation, and fuel cells.” –CF3-substituted aromatic polyimides and poly(arylene ether)s have been developed in the last decade.–CF3-subtituted poly(aryl ether ketone)s and poly(aryl ether sulfone)s, especially with respect to proton-exchage membranes for fuel-cell applications are being developed."
(Dhara and Banerjee (1022-1077) Progress in Polymer Science 35 #8 (2010)
Electrospinning Fluorinated Materials
Fluorinated Acrylics
Fluorinated Coatings
Fluorinated Epoxies
Fluorinated Polyamides
Fluorinated Polyethers
Fluorinated Polyimides
Fluoropolymer Foams
Fluoropolymer Carbon Nanotube Composites
Fluorinated Polyimides
Fluorinated Polystyrenes
Fluorinated Silicones
Fluorosurfactants
HF Scavengers
Polymers /Resins
Polyperfluorosulfonates
Polytetrafluoroethylene (PTFE)
Polyvinyl Fluoride (PVF)
Polyvinylidene Fluoride (PVDF)
Recent US Patents
12/7/2010
7,847,028
Curable composition and fluorinated cured product
Sugiyama and Ohkura of the Asahi Glass Company, Japan, developed a curable composition which can yield a fluorinated cured product excellent in transparency, light resistance, heat resistance, and mechanical strength, and minimally damaged by stress concentration. The invention relates to a curable composition comprising a perfluoro polymer (a) containing a unit derived from a perfluorodiene having two polymerizable carbon-carbon double bonds, wherein two carbon atoms in one carbon-carbon double bond form the main chain, and the other carbon-carbon double bond forms a side chain; a perfluorocyclic monoene (b) having at least 8 carbon atoms, which has an alicyclic structure made of carbon atoms and optionally containing an oxygen atom, and one polymerizable carbon-carbon double bond, wherein at least one of two carbon atoms forming the carbon-carbon double bond is a carbon atom constituting the alicyclic structure; and a polymerization initiator (i).
11/2/2010
7,825,275
Fluorinated compound, fluoropolymer and method for producing the compound
Murata et al Asahi Glass Company, Japan have developed fluoroalkadiens having carboxyl groups, such as 1,1,2,3,3-pentafluoro-4-alkoxycarbonyl-1,6-heptadiene and a polymerization method. (RDC 3/2/2011)
9/14/2010
7,795,342
Extender for treatment of fiber materials
Moors et al of Huntsmann developed an aqueous dispersions of perfluoroalkyls- for oil- and water-repellent finishing of fiber materials. These dispersions have a long shelf life and contain a composition prepared by by successive reaction of polyfunctional isocyanates with monohydric alcohols, oximes and finally amines or polyhydric alcohols. (RDC 11/22/2010)
9/7/2010
7,790,807
Fluorocarbon terminated oligo- and poly-carbonates as surface modifiers
Brunner et al of Ciba Speciality Chemicals has developed fluorocarbon polycarbonates as surface modifiers. By making surfaces hydrophobic they can be made "easy to clean", "self-cleaning" "antisoiling", "soil-release" "antigraffiti", "oil resistance", "solvent resistance", "chemical resistance", "self lubricating", "scratch resistance", "low moisture absorption" and "hydrophobic" surface.
Recent Journal Articles
1/7/2011
One-step fabrication of fluoropolymer transparent films with superhydrophobicity by dry method
(524–529)Journal of Applied Polymer Science 120 #1 (2011)
Wang, Wang and Feng of Tsinghua University, China deposited fluoropolymer transparent thin films were on different substrates by one-step vacuum evaporation method, which showed a water contact angle greater than 150° (Superhydrophobic). (RDC 1/10/2011)
12/3/1010
Towards a Universal Method for the Stable and Clean Functionalization of Inert Perfluoropolymer Nanoparticles: Exploiting Photopolymerizable Amphiphilic Diacetylenes
(pages 3932–3940)Advanced Functional Materials 20 #22 (2010)
Morasso et al functionalized perfluoropolymer nanoparticles by coating with newly synthesized asymmetric diacetylenic monomer. Other monomers were added to form a robust polymeric shell around the perfluoroelastomer core via a clean UV-promoted localized photopolymerization. (RDC 11/29/2010)
Influence of the poly(propylene imine) generation in the LC properties of ionic codendrimers bearing fluorinated and perhydrogenated chains
( 278–285) Journal of Polymer Science Part A: Polymer Chemistry 49 #1 (2011)
Hernández-Ainsa et al of Universidad de Zaragoza, Spain synthesized a series of codendrimers constituted by the first five generations of poly(propylene imine) (PPI) ionically substituted with 2H,2H,3H,3H-perfluoroundecanoic acid (af) and undecanoic acid (ac) in a fixed ratio (1:3). Incompatibility generated by combining fluorinated and perhydrogenated chains in the same molecule causes a peculiar mesomorphic behavior depending on the generation of the codendrimers. Thus smectic A, frustrated smectic A or rectangular columnar mesophases have been detected. Despite their different liquid crystalline organization, they are capable to self-assemble in homogeneous molecular length layers on a surface. (RDC 12/9/2010)