The process of foaming a polyolefin, e.g., polyethylene, composition using as a nucleator a combination of (A) a fluororesin, and (B) a mixture of (1) a first component consisting of at least one of citric acid and an alkali metal citrate, and (2) a second component consisting of at least one of an alkali metal citrate, a di-alkali metal hydrogen citrate, an alkali metal dihydrogen citrate and an alkali metal bicarbonate with the proviso that if the first component of the mixture is an alkali metal citrate, then the second component of the mixture is not an alkali metal citrate.

Modified plastic surfaces with perfluoropolymers are provided, whereby plastic surfaces that are intended for use under tribological conditions have substantially improved assembly properties and/or sliding friction properties and exhibit a very low degree of wear. Accordingly, modified plastic surfaces with perfluoropolymers are provided in which modified perfluoropolymer (micro)powders are present at the surface of plastics that comprise olefinically unsaturated double bonds at least at the surface such that the modified perfluoropolymer (micro)powders are chemically covalently bonded via a radical coupling of the olefmically unsaturated double bonds with perfluoropolymer (peroxy) radicals of the modified perfluoropolymer (micro)powders after a reactive conversion under mechanical stress at room temperature.

The invention pertains to a thermoplastic fluoropolymer composition comprising one or more polymer A comprising recurring units derived from ethylene and recurring units derived from halogenated monomers selected from chlorotrifluoroethylene (CTFE) and tetrafluoroethylene (TFE) and one or more polymer B comprising recurring units derived from ethylene, recurring units derived from halogenated monomers selected from CTFE and TFE, and recurring units derived from hexafluoroisobutylene (HFIB) and/or perfluoropropylvinylether (PPVE). The resulting composition allows to manufacture films having exceptional transparency and good mechanical properties which can be used for examples as architectural films.

Disclosed herein are curable compositions comprising an epoxide-functional polymer, a curing agent capable of reacting with the epoxide-functional polymer that is activatable by an external energy source, and a fluoropolymer that is substantially free of a reactive functional group. The epoxide-functional polymer may be a solid epoxide-functional polyurethane comprising a di-isocyanate. Also disclosed are articles comprising one of the compositions in an at least partially cured state positioned between first and second substrates. Also disclosed are methods of forming an adhesive on a substrate.

A method of making an oil repellent sheet material according to an embodiment of the present disclosures includes a step of applying to a porous sheet a composition for forming an oil repellent layer, the composition containing a solvent and an amorphous fluorine resin dispersed therein, and a step of swaging the porous sheet after the step of applying, wherein the porous sheet has a fibrous skeleton composed mainly of polytetrafluoroethylene, the method of making an oil repellent sheet material further comprising a heat treatment step of heating the porous sheet to which the composition for forming an oil repellent layer is applied, before or after the step of swaging.

A method of manufacturing a hydrophobic/oleophobic material comprises providing an open cell structure having a plurality of interconnected cells and providing a resin solution containing nanoparticles. The resin solution containing nanoparticles is introduced into, and is cured within, the interconnected cells of the open cell structure. By curing the resin solution containing nanoparticles within the interconnected cells of the open cell structure, a highly hydrophobic/oleophobic material can be produced which exhibits isotropic properties.

As an exemplary configuration, a long film is configured by thermomeltable polymers including a first unit based on tetrafluoroethylene and a second unit based on perfluoro (alkyl vinyl ether), including spherulites of the thermomeltable polymers, wherein radius of each spherulite is 10 μm or less. As another exemplary configuration, a long film is configured by tetrafluoroethylene polymers having a melt flow rate within a range of 5 to 40 g/10 min. The long film is heated at 180° C. for 30 minutes so as to measure the thermal expansion rate, and when letting thermal expansion rate in a first direction, which extends at a 45-degree angle to a melt flow direction be A, and thermal expansion rate in a second direction orthogonal to the first direction be B, A and B are respectively within the range of −2 to +1%, and |A−B| is 1% or less.

A polymer foam composition includes: from about 5 wt. % to about 84 wt. % of a polymer base resin; from about 15 wt. % to about 70 wt. % of a thermally conductive filler having an aspect ratio greater than 1:1; from about 0.01 to about 5 wt. % of a nanostructured fluoropolymer; and from about 0.01 wt. % to about 2 wt. % of a foaming agent. The polymer foam composition is formed from a core-back process and exhibits a thermal conductivity of at least 1.5 W/mK when tested in accordance with ISO 22007-2. Articles including the polymer foam composition are further described; in one aspect the article is a heat exchanger. Methods of forming the polymer foam composition are also described.

Provided herein are articles including repellent coatings, as well as methods of making as using these articles. The articles can comprise a substrate and a repellent coating disposed on a surface of the substrate. The repellant coating can comprise hydrophobic particles dispersed within a polymer binder. The hydrophobic particles can be aggregated within the polymer binder, thereby forming a multiplicity of re-entrant structures embedded within and protruding from the polymer binder. The repellent coatings, and by extension the articles described herein, can exhibit selective wetting properties (e.g., superhydrophilicty/super-oleophobicity, or super-hydrophobicity/superoleophilicity).

To provide a decorative film, whereby formation of wrinkles is suppressed when bonded to a three dimensional molded product in a stretched state, a method for producing a decorative film, a method for producing a decorative film-attached three dimensional molded product, and a fluorinated polymer composition. The decorative film of the present invention is a decorative film having at least a base film layer and a fluorinated layer containing a crosslinked fluorinated polymer, wherein the crosslinked fluorinated polymer is a crosslinked product of a crosslinkable polymer comprising units based on a fluoroolefin and units having a crosslinkable group, and the average molecular weight between crosslinking groups of the crosslinked fluorinated polymer is from 500 to 50,000.