Abstract: A method of coating a polymer comprising the step of treating the polymer with an activating agent to produce a reactive polymer, for example treating a polymer bearing at least one X (halogen) group and at least one H with base to eliminate HX. The reactive polymer is then reacted with a reactive coating, for example PVP, preferably in the presence of an initiator like persulfate anions, to produce a coated polymer, which may be hydrophilic in nature.

Abstract: Methods of evaluating birefringence of an adhesive agent, and of designing and producing an adhesive agent using the evaluation method, as well as adhesive agents produced using these methods. A polarizing plate and a liquid crystal display device using the obtained adhesive agent are proposed, as well as methods for producing the same.

Abstract: Provided is a fluorine-containing elastomer blend comprising 5 to 60 wt. % of a high-molecular-weight, fluorine-containing elastomer having a number average molecular weight of 3,000,000 or more, 20 to 80 wt. % of a medium-molecular-weight, fluorine-containing elastomer having a number average molecular weight of 100,000 to 1,000,000, and 10 to 50 wt. % of a low-molecular-weight, fluorine-containing elastomer having a number average molecular weight of 7,000 to 13,000; the number average molecular weight Mn of each fluorine-containing elastomer being measured by liquid chromatography using tetrahydrofuran as a developing solvent at a polymer concentration of 0.5 wt. % at a measurement temperature of 35° C. The fluorine-containing elastomer blend can achieve low hardness and low modulus while improving roll processability.

Abstract: Provided is a film having high crystallinity, transparency, and surface smoothness, a lamination of the film, a sheet of the film, and a laminated body. A film contains vinylidene fluoride-based resin (A) and acrylic-based resin (B). The film has at least one surface with arithmetic mean roughness of 0.1 to 20 nm. The at least one surface has crystal fusion heat of 18 to 40 J/g and a haze value of 3.5 or less, the crystal fusion heat being measured using a differential scanning calorimeter.

Abstract: The invention relates to an extrusion agent comprising: at least one heterogeneous PVDF (A), in other words a copolymer of VDF and at least one comonomer of VDF, comprising by weight at least 50%, advantageously at least 75%, of VDF which has a melting point Tm (expressed in ° C.)>172-549 m, preferably >1.1×(172-549 m), where m denotes the overall molar percentage of comonomer(s); and at least one interface agent (B), which are optionally diluted in a polyolefin (C). The heterogeneous PVDF preferably has a Tm of between 160 and 172° C. Advantageously it is also a VDF-HFP copolymer containing, by weight, from 88% to 92% of VDF and from 8% to 12% of HFP. The extrusion agent is used to reduce or eliminate the surface defects which arise during the extrusion of a thermoplastic resin (D). This resin may be a polyolefin, a styrenic resin, a polyester or a PVC. Optionally it may also be filled, i.e., may contain dispersed organic or inorganic particles.

Abstract: Provided is a film for a film capacitor in which electrical insulation, and especially electrical properties at high temperatures are improved while a high dielectric constant of a vinylidene fluoride resin is maintained. The film for a film capacitor includes a tetrafluoroethylene resin (a1) that includes a vinylidene fluoride unit and a tetrafluoroethylene unit in the vinylidene fluoride unit/tetrafluoroethylene unit ratio (mol %) of 0/100 to 49/51 as a film-forming resin (A).

Abstract: A release liner can include one or more release layers. The release layer can include a thermoplastic polymer matrix. Moreover, the release layer can include an organic particulate phase. The organic particulate phase can be dispersed in the thermoplastic polymer matrix. In one embodiment, the organic particulate can include micronized PTFE particles. The PTFE particles can be present in the release liner such that the surface roughness Sa of the release liner ranges from 0.1 microns to 1 micron.

Abstract: A cable jacket includes an extruded polymer made from PVDF, PVC and a compatibilizing agent, where a ratio of PVDF, PVC and a compatibilizing agent is substantially 7:3:1.

Abstract: The invention provides a fluororesin composition capable of providing a molded article having low relative dielectric constant, excellent in a temperature stability and causing only small transmission losses. The invention is a fluororesin composition wherein a rate of change in relative dielectric constant between 25° C. and 80° C. of a molded article produced therefrom under a standard condition is not greater than 0.2%.

Abstract: The present invention is directed to curable film-forming compositions comprising: a) a curing agent; and b) a film-forming material comprising a fluoropolymer, a polymer having functional groups, and a plurality of particles comprising fillers and/or nanoscale particles having an average particle size ranging from 1 to less than 1000 nanometers prior to incorporation into the composition; wherein 20 to 30 percent by weight of the film-forming material of b) comprises the fluoropolymer. In certain embodiments, after application to a substrate as a coating and after curing, the cured composition demonstrates burnish resistance and an 85° gloss of less than 50. Multi-component composite coating compositions are also provided.

Abstract: A topcoat material for immersion lithography and a method of performing immersion lithography using the topcoat material. The topcoat material includes a mixture of a first polymer and a second polymer. The first and second polymers of the topcoat material, when the topcoat material is formed into a topcoat layer between an immersion fluid and a photoresist layer, disperse non-homogenously throughout the topcoat layer.

Abstract: A composition and a polymer are provided. The composition includes the polymer and a melamine derivative. The polymer has a formula of R is hydrogen, halide, alkyl group, alkoxyl group, haloalkyl group or nitro group. n is 1-5 of integer. x+y+z=1, x>0, y?0, z?0. The melamine derivative includes R1 is hydrogen, CqH2q+1, or m and q independently is 1-10 of integer. R2, R3 and R4 independently is hydrogen, halide, or C1-C54 alkyl group.

Abstract: The invention pertains to a thermoplastic fluoropolymer composition comprising: at least one thermoplastic partially fluorinated fluoropolymer having a melt flow index (MFI) of less than 10 g/10 min, as measured according to ASTM D-1238 under a piston load of 5 kg polymer A; from 0.05 to 5% by weight of A at least one (per)fluoropolyether, polymer B; and from 0 to 10% by weight of A of at least one per(halo)fluoropolymer polymer C. The addition of a (per)fluoropolyether B and, optionally, of a per(halo)fluoropolymer C advantageously enables improvement of rheological behavior of thermoplastic partially fluorinated fluoropolymer A, making possible processing in less severe conditions and yielding final parts with outstanding surface aspect and good homogeneity and coherency. Still objects of the inventions are the process for manufacturing said thermoplastic fluoropolymer composition and the articles thereof.

Abstract: There is provided a fluorine-containing elastomer composition assuring easy kneading and providing a crosslinked article having improved strength. The fluorine-containing elastomer composition comprises (A) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a branching coefficient of 30 to 300 ppm, a Mooney viscosity (ML1+10: 121° C.) of 7 to 80 and a molecular weight distribution (Mw/Mn) of 1.5 to 4, and (B) an elastomer of a vinylidene fluoride/hexafluoropropylene copolymer having a storage modulus G? at 180° C. at 500 cpm of 500 to 900, and a mass ratio of (A)/(B) is 70/30 to 90/10.

Abstract: A multilayer optical body is disclosed. The optical body includes an optical film including polyester, a first skin layer is disposed on at least one side of the polyester optical film, and a strippable skin layer is disposed on the first skin layer. The first skin layer includes a mixture of a polyacrylate and a second polymer. Methods of making such optical bodies are also disclosed.

Abstract: Blended fluoropolymer compositions that may be applied as a coating to a flexible substrate. The compositions include at least one high molecular weight polytetrafluoroethylene (HPTFE), at least one a low molecular weight polytetrafluoroethylene (LPTFE) and at least one melt processible fluoropolymer (MPF). After being applied to the flexible substrate, optionally over a primer or basecoat and/or midcoat and then cured, the compositions form coatings that demonstrate improvement in one or more of abrasion resistance, release characteristics, translucency/transparency, and impermeability.

Abstract: The invention pertains to a thermoplastic fluoropolymer composition comprising: at least one thermoplastic partially fluorinated fluoropolymer having a melt flow index (MFI) of less than 10 g/10 min, as measured according to ASTM D-1238 under a piston load of 5 kg polymer A; from 0.05 to 5% by weight of A at least one (per)fluoropolyether, polymer B; and from 0 to 10% by weight of A of at least one per(halo)fluoropolymer polymer C. The addition of a (per)fluoropolyether B and, optionally, of a per(halo)fluoropolymer C advantageously enables improvement of rheological behavior of thermoplastic partially fluorinated fluoropolymer A, making possible processing in less severe conditions and yielding final parts with outstanding surface aspect and good homogeneity and coherency. Still objects of the inventions are the process for manufacturing said thermoplastic fluoropolymer composition and the articles thereof.

Abstract: Disclosed therein is method for preparing novel suspension polymer comprising tetrafluoroethylene polymer, and powders or granules produced by the method. The suspension polymer of the present invention can be obtained by suspension polymerization of a styrene-based monomer, an acrylic monomer or a mixed monomer thereof in the presence of PTFE, followed by filtering and drying, and can be used as flame retarding properties improver of engineering plastic and the like.

Abstract: The present application relates to a rubber composition containing a fluororubber, a radical initiator having a 1-minute half-life temperature of 280° C. or higher, and a crosslinking assistant having a melting point of 200° C. or higher and having two or more double bonds between carbon atoms; and a thermoplastic resin composition containing a fluororesin and the rubber composition.

Abstract: The present invention provides a resin which generates an acid by irradiation and is a salt of an organic cation and an anionic polymer wherein the anionic polymer has no carbon-carbon unsaturated bond. The present invention further provides a chemically amplified resist composition comprising the same.

Abstract: A process is provided for improving the MIT flex life of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, said perfluoroalkyl containing from 1 to 5 carbon atoms, comprising incorporating melt flowable polytetrafluoroethylene into said copolymer and thereafter heat treating the resultant composition at a temperature of at least 280° C., the amount of said polytetrafluoroethylene and said heat treatment being effective to increase the flex life of said composition by at least 2× the flex life of both said copolymer and said composition prior to said heat treatment and to thermally transform the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition.

Abstract: To provide a process for producing an ethylene/tetrafluoroethylene copolymer composition which is excellent in mechanical properties of the molded product and which has good moldability. A process for producing a fluorinated copolymer composition, which comprises heating a mixture comprising ethylene/tetrafluoroethylene copolymers having extremely different viscosities and a solvent capable of dissolving the ethylene/tetrafluoroethylene copolymers at a temperature not higher than the melting points of the ethylene/tetrafluoroethylene copolymers, to at least a temperature where the ethylene/tetrafluoroethylene copolymers are dissolved in the solvent to obtain a solution state; and removing the solvent.

Abstract: The invention pertains to a thermoplastic VDF polymer composition comprising: at least one thermoplastic vinylidene fluoride (VDF) polymer comprising at least 85% by moles of recurring units derived from VDF; and at least one ethylene/chlorotrifluoroethylene (ECTFE) polymer, wherein said ECTFE polymer possesses a melting point of less than 210° C. and it is comprised in an amount of from 0.1 to 20% wt with respect to the total weight of VDF polymer and ECTFE polymer. The invention also pertains to a process for making the VDF polymer and to the uses thereof for manufacturing films, in particular transparent films.

Abstract: The present invention includes crosslinked perfluoroelastomeric compositions and molded articles formed from a cross-linkable perfluoroelastomeric composition having a first curable perfluoropolymer having a cure site monomer and a second perfluoropolymer having a cure site monomer. The molar ratio of the tetrafluoroethylene monomer to perfluoroalkylvinyl ether in one perfluoropolymer is about 0 to 100 to about 65 to 35 in the perfluoropolymer. The molar ratio of the tetrafluoroethylene monomer to the perfluoroalkylvinyl ether monomer in the second polymer is about 65:35 to about 95:5 in the second perfluoropolymer. The composition further includes a curative.

Abstract: A fluorine-containing alloyed copolymer, which comprises a fluorine-containing elastomer copolymer having a fluorine content of not less than 64% by weight, and a resinous tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer having an amount of heat of crystal fusion ?H of not more than 10 J/g, can give crosslinked moldings having a distinguished plasma resistance against both CF4 plasma treatment and O2 plasma treatment, and also a distinguished cracking resistance at the plasma irradiation, and showing necessary normal state physical properties and compression set when used as seals, and capable of providing soft seals of low hardness, and attaining molding at relatively low temperatures.

Abstract: Peroxide curable fluoroelastomer compositions and articles made therefrom are disclosed. The compositions contain 5 to 45 weight percent, based on total weight of all fluoroelastomers present in the composition, of a blend of dynamically cured fluoroelastomer particles in an uncured fluoroelastomer. The compositions are unfilled, but have tensile properties adequate for many end use applications and are particularly useful as seals in semiconductor manufacturing equipment.

Abstract: A fuel cell includes a first flow field plate defining at least one flow field channel. A cathode catalyst layer is disposed over at least a portion of the first flow field plate. A polymeric ion conducting membrane is disposed over cathode catalyst layer. An anode catalyst layer is disposed over the polymeric ion conducting membrane. Finally, a second flow field plate defining at least one flow field channel is disposed over the anode catalyst layer. The polymeric ion conducting membrane extends beyond the cathode catalyst layer and the anode catalyst layer such that the fuel cell has at least one peripheral region with the polymeric catalyst layer interposed between first flow field plate and the second flow field plate without the cathode catalyst layer and the anode catalyst layer.

Abstract: A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.

Abstract: A flame retardant composition and method for making flame retardant articles. The flame retardant composition can include a silicone polyetherimide, an fibrillated polytetrafluoroethylene, and a zinc borate. The silicone polyetherimide can be present in an amount of from about 99.6 to about 80.0 percent by weight. The silicone polyetherimide can have from about 5 to about 50 percent by weight dimethyl siloxane units, and less than about 100 ppm amine end groups. The fibrillated polytetrafluoroethylene can be present in an amount of from more than about 1.25 to about 5.0 percent by weight. The fibrillated polytetrafluoroethylene can be encapsulated in a polystyrene, a poly(styrene acrylonitrile), a poly(methyl methacrylate), a polycarbonate, a polyetherimide, a polysulfone, and combinations thereof. The zinc borate can be present in an amount of more than 0 to about 10 percent by weight.

Abstract: A seal is formed of a material including a crosslinked fluoropolymer. The seal substantially prevents leaks in a high pressure pump.

Abstract: The present invention pertains to a linear semi-crystalline copolymer [polymer (A)] comprising recurring units derived from vinylidene fluoride (VDF) monomer and at least one hydrophilic (meth)acrylic monomer (MA) of formula: wherein each of R1, R2, R3, equal or different from each other, is independently an hydrogen atom or a C1-C3 hydrocarbon group, and ROH is a hydrogen or a C1-C5 hydrocarbon moiety comprising at least one hydroxyl group, said polymer (A) comprising from 0.05 to 10% by moles of recurring units derived from said hydrophilic (meth)acrylic monomer (MA) and being characterized by a fraction of randomly distributed units (MA) of at least 40%, having improved thermal stability, to a process for its manufacture, to a composition comprising the same, and to its use as binder in batteries or for the manufacture of hydrophilic membranes.

Abstract: A polymer composition comprising A) a first polymer comprising (a) hydrophobized nanoparticle; (b) C1 to C18, straight, branched, or cyclic alkyl(meth)acrylate; (c) N-methylol(meth)acrylamide or a monomer of formula (I) R—(OCH2CH2)a—O—C(O)—C(R1)?CH2??(I) ?wherein R is hydrogen, C1-C4 alkyl, or —C(O)—C(R1)?CH2, and R1 is H or —CH3; said first polymer in contact with B) a second polymer comprising (d) a fluorinated monomer of formula (II) Rf1-L-X—C(O)—C(R)?CH2??(II) ?wherein Rf1 is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to about 100 carbon atoms; optionally interrupted by 1 to about 50 oxygen atoms; wherein the ratio of carbon atoms to oxygen atoms is at least 2:1 and no oxygen atoms are bonded to each other; L is a bond or a linear or branched divalent linking group having 1 to about 20 carbon atoms, said linking group optionally interrupted by 1 to about 4 hetero-radicals selected from the group consisting of —O—, —NR6—, —S—, —SO—, —SO2—, and —N(R6)

Abstract: A process or method for preparing a composition that includes a core of polytetrafluoroethylene and a styrene/acrylonitrile shell (or a core-shell polytetrafluoroethylene including styrene/acrylonitrile (SAN) powder) is provided. The process includes a polymerisation process or reaction and a flocculation process or reaction. The temperatures utilized, and/or the relative quantities and/or concentrations of the reagents, for the polymerisation process and flocculation process are specifically selected. The core-shell polytetrafluoroethylene-based powder produced is used as an additive for plastic/polymers, for instance styrene-based polymers. The core-shell polytetrafluoroethylene-based powder produced is associated with improved workability and enhanced mechanical characteristics.

Abstract: A brake pad obtainable by peroxide cross-linking with a mixture comprising: a polymeric base having from 10 to 40 parts by weight of hydrogenated acrylonitrile-butadiene rubber (HNBR); from 90 to 60 parts by weight of a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene terpolymer; and, fibres from 5 to 15 parts by weight per 100 parts by weight of polymeric base.

Abstract: A method for producing a vinylidene fluoride based polymer powder having a high molecular weight and excellent solubility in an organic solvent, which is useful as an electrode binder for nonaqueous cells, is provided. Methods for producing an NMP solution and an electrode mixture are also provided. A vinylidene fluoride based polymer powder produced by supercritical suspension polymerization in an aqueous dispersion medium wherein a volume of pores having a pore diameter of 0.03 ?m to 1.0 ?m, as measured by a mercury porosimeter, is 77 vol % to 93 vol % of a total pore volume and an inherent viscosity is 2.0 dl/g or greater is obtained.

Abstract: Oriented films and methods of forming the same are discussed herein. The oriented films generally include a propylene based polymer and an additive selected from fluoropolymers, fluoroelastomers and combinations thereof, wherein the additive is present in an amount of from about 50 ppm to about 20,000 ppm.

Abstract: The present invention relates generally to the use of talc as a chemical foaming agent in perfluoropolymers to form foamable and foamed compositions. For example, in one aspect, a foamable composition is disclosed, which comprises (i) one or more base perfluoropolymers comprising at least 50 percent by weight of the composition, and (ii) talc blended with the one or more base perfluoropolymers, where the talc comprises 3 percent to about 15 percent by weight of the composition. Each of the perfluoropolymers is selected from the group consisting of tetrafluoroethylene/perfluoromethylvinyl ether copolymer (MFA), hexafluoropropylene/tetrafluoroethylene copolymer (FEP) and perfluoroalkoxy (PFA) and any blend thereof, where hydrogen-containing fluoropolymers are absent from the composition. The one or more base perfluoropolymers are melt-processable at one or more elevated processing temperatures of at least about 600° F.

Abstract: The invention relates to a composition that has been obtained by the melt-process recycling of one or more multi-layer articles, where the multi-layer articles are composed of at least one melt-processible fluoropolymer layer. The composition of the invention is a compatible blend of the different layers from the multi-layer articles. The other layers of the multi-layer articles are also melt-processible, and include one or more layers chosen from: a) a melt-processible fluoropolymer of a different composition, b) a non-fluoropolymer, and c) a barrier layer. The composition is useful for forming an article in a melt-process operation. The composition may be used by itself, may be blended with other virgin or recycled materials, or may be used at low levels with melt-processible polymers as a process aid.

Abstract: This invention pertains to sealing articles of vulcanized (per)fluoroelastomer compositions incorporating particles of a vinylidene fluoride (VDF) polymers having a Shore A hardness of at least 85 when determined according to ASTM D 2240 Type A Durometer method, and a compression set of less than 30%, when determined according to ASTM D395 at 200° C. for 70 h on O-ring according to ASTM D1414, and to a process for their manufacture by vulcanizing-molding and thermal post-treating at a temperature above the melting point of the VDF polymer.

Abstract: Embodiments of films and methods for making the films are provided. The film comprises a fluoropolymer layer having a surface and comprising a melt processable fluoropolymer and a functionalized polymer dispersed throughout the fluoropolymer layer. A portion of the functionalized polymer is disposed at the surface of the fluoropolymer layer for bonding to a second layer.

Abstract: The present invention provides a process for preparing a fluorine-containing elastomer in a high productivity comparable to that of non-iodine transfer polymerization process by carrying out an iodine transfer polymerization at high pressure. The present invention also provides a fluorine-containing elastomer prepared by this process, and fluorine-containing molded articles. The process is a batch copolymerization process conducted under conditions that the reduced temperature of the critical constant is at least 0.95 and the reduced pressure of the critical constant is at least 0.

Abstract: Novel polymers for biomedical use, especially rigid gas permeable contact lenses that are based on bulky side-chain siloxane cross linkers. The siloxanes, either alone, or as copolymers with bulky and non-bulky mono-functional polymerizable siloxanes, fluoro monomers, such as hexafluoroisopropyl methacrylate, and hydrophilic monomers, result in transparent, high oxygen permeable polymers possessing excellent lathing and milling characteristics.

Abstract: Extrudable (per)fluoroelastomer compositions comprising crosslinkable (per)fluoroelastomers having: at least two glass transition temperatures Tg on DSC analysis, at least one melting peak on DSC analysis with a ?H of second melting of between 0.3 and 5.5 J/g, and a bimodal molecular weight distribution such that the ratio Mn1/Mn2 is between 10 and 30, wherein Mn1 represents the number-average molecular weight of the distribution of the high molecular weight fluoroelastomer and Mn2 represents the number-average molecular weight of the distribution of the low molecular weight fluoroelastomer.

Abstract: The present invention discloses a method for making blended polymers by utilizing fluorophilic inter-polymer associative interactions between perfluorocarbon functional groups attached on the constituent polymers. The method of the present invention is capable of forming blended polymers from otherwise incompatible polymers. Also disclosed are blended polymers obtained by the method thereof. Methods and devices utilizing novel blended polymer of the present invention including chromatography, catalysis, photonic and sensor applications are also provided.

Abstract: A melt-mixed composition of non-melt flowable polytetrafluoroethylene (PTFE) and melt-fabricable perfluoropolymer is provided that exhibits thixotropy at increasing shear rate in the molten state and high elongation at break even at PTFE concentrations well above 4 wt %, based on the combined weight of the PTFE and the perfluoropolymer, e.g. at least 200% up to at least 30 wt % PTFE, the composition also exhibiting the structure of a dispersion of submicrometer-size particles of the PTFE in a continuous phase of the melt-fabricable perfluoropolymer.

Abstract: A fluoroelastomer composition comprising: at least one fluoroelastomer [fluoroelastomer (A)]; from 0.1 to 25 phr (with respect to fluoroelastomer (A)) of at least one melt-processable per(halo)fluoropolymer having a melting point of at most 250° C. [polymer (F)]; and optionally at least one (per)fluoropolyether [(per)fluoropolyether (E)]. The incorporation of the polymer (F) in the fluoroelastomer composition as described above enables easier processing of the fluoroelastomer composition, both in injection molding and extrusion molding technologies, yielding improved behavior in mold release, mold fouling, and aspect surface of the molded parts.

Abstract: A hydrophilic vinylidene fluoride resin composition, comprising: porous vinylidene fluoride polymer particles and a hydrophilic polymer having a weight-average molecular weight of at least 2×105 contained in the pores of the porous vinylidene fluoride polymer particles. The composition is preferably obtained by subjecting a slurry containing porous vinylidene fluoride polymer particles after suspension polymerization to an appropriate degree of heat treatment for adjusting the amount of residual polymerization initiator, then impregnating the Polymer particles with a hydrophilic monomer and polymerizing the monomer. The thus-obtained vinylidene fluoride resin composition exhibits persistent hydrophilicity and good processability.

Abstract: A fluoropolymer molding method and the resulting molded article are disclosed where the fluoropolymer is composed of fluoropolymer particles each having a multi-layer structure that consists of at least two types of fluoropolymers having different melting points, with at least one inner layer made of a fluoropolymer with a melting point higher than that of the outermost fluoropolymer. The fluoropolymer of the at least one inner layer is molded at a temperature higher than the melting point of the lowest melting point of the fluoropolymers that form the outermost layers of the multi-layer-structure fluoropolymer particles, and lower than the melting point of the fluoropolymer having the highest melting point. The resulting articles have excellent chemical liquid resistance and gas impermeability and low linear expansion coefficient.

Abstract: A fluoropolymer coating composition that may be applied over a primer and/or at least one midcoat in a non-stick coating system. The coating composition may be prepared and applied in the form of a liquid dispersion, and includes at least one fluoropolymer base component, such as polytetrafluoroethylene (PTFE) and, in particular, at least one high molecular weight PTFE (HPTFE). The coating composition additionally includes a blended fluoropolymer composition. The blended fluoropolymer composition is a blend of at least one low molecular weight PTFE (LPTFE) and at least one melt-processible fluoropolymer. After application directly to a substrate or over an underlying coating, the coating demonstrates improved abrasion and scratch resistance, as well as improved release characteristics, as compared to known coatings that include only HPTFE or HPTFE with a small amount of melt processible fluoropolymer.

Abstract: Provided are modified polytetrafluoroethylene particles having excellent moldability and processability. The modified polytetrafluoroethylene particles each have a core-shell structure that includes a particle core and a particle shell, the particle core having repeating units of tetrafluoroethylene and a comonomer (a), the particle shell having repeating units of tetrafluoroethylene and a comonomer (b), the comonomer (a) being a (perfluoroalkyl)ethylene represented by the following formula (I): CH2?CH—Rf??(I) wherein Rf represents a C1 to C10 perfluoroalkyl group, the comonomer (b) being at least one monomer selected from the group consisting of 1,1,3,3,3-pentafluoro-1-propylene and 1,2,3,3,3-pentafluoro-1-propylene.