A method for producing a fluoropolymer, which includes polymerizing a monomer (I) represented by the general formula (I) in an aqueous medium to produce the fluoropolymer of the monomer (I), wherein an oxygen concentration in a reaction system of the polymerization is maintained at 500 ppm by volume or less:

CX.sub.2═CY—CF.sub.2—O—Rf-A   General formula (I):

wherein X and Y are independently H, F, CH.sub.3, or CF.sub.3, and at least one of X and Y is F; Rf is a fluorine-containing alkylene group having 1 to 40 carbon atoms, or a fluorine-containing alkylene group having 2 to 100 carbon atoms and having an ether bond; and A is —COOM, —SO.sub.3M, —OSO.sub.3M, or —C(CF.sub.3).sub.2OM, wherein M is H, a metal atom, NR.sup.7.sub.4, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, and R.sup.7 is H or an organic group.

In a first aspect, a transparent fluoropolymer film includes, a vinyl fluoride polymer, 2 to 8 wt % of an acrylate polymer, and 0.1 to 4 wt % of a triazine UV absorber. After heating at 100° C. for 96 hours, the transparent fluoropolymer film has a 340 nm absorbance of at least 1.5. In a second aspect, a transparent multilayer film includes a polymeric substrate film and a fluoropolymer film. The fluoropolymer film includes a vinyl fluoride polymer, 2 to 8 wt % of an acrylate polymer and 0.1 to 4 wt % of a triazine UV absorber. After heating at 100° C. for 96 hours, the transparent fluoropolymer film has a 340 nm absorbance of at least 1.5.

In a first aspect, a transparent fluoropolymer film includes, a vinyl fluoride polymer, 2 to 8 wt % of an acrylate polymer, and 0.1 to 4 wt % of a triazine UV absorber. After heating at 100° C. for 96 hours, the transparent fluoropolymer film has a 340 nm absorbance of at least 1.5. In a second aspect, a transparent multilayer film includes a polymeric substrate film and a fluoropolymer film. The fluoropolymer film includes a vinyl fluoride polymer, 2 to 8 wt % of an acrylate polymer and 0.1 to 4 wt % of a triazine UV absorber. After heating at 100° C. for 96 hours, the transparent fluoropolymer film has a 340 nm absorbance of at least 1.5.

The present invention relates to new coating compositions for the preparation of functional surface coatings on various base material substrates. The coating compositions are based on a silazane-containing polymer and a fluorine-containing polymer, wherein the fluorine-containing polymer comprises a first repeating unit U.sup.1 and a second repeating unit U.sup.2. The coating compositions provide improved physical and chemical surface properties and may be applied by user-friendly methods.

The present invention relates to new coating compositions for the preparation of functional surface coatings on various base material substrates. The coating compositions are based on a silazane-containing polymer and a fluorine-containing polymer, wherein the fluorine-containing polymer comprises a first repeating unit U.sup.1 and a second repeating unit U.sup.2. The coating compositions provide improved physical and chemical surface properties and may be applied by user-friendly methods.

The invention provides a novel composition capable of providing a film or coat exhibiting excellent adhesiveness to a water-impermeable sheet and to an EVA encapsulant layer even without corona discharge treatment. The composition of the invention contains a fluorine-containing polymer and a polyol compound having a hydroxyl value of 10 to 300. The polyol compound is contained in an amount of not less than 0.1 mass % but less than 100 mass % relative to the fluorine-containing polymer.

The invention provides a novel composition capable of providing a film or coat exhibiting excellent adhesiveness to a water-impermeable sheet and to an EVA encapsulant layer even without corona discharge treatment. The composition of the invention contains a fluorine-containing polymer and a polyol compound having a hydroxyl value of 10 to 300. The polyol compound is contained in an amount of not less than 0.1 mass % but less than 100 mass % relative to the fluorine-containing polymer.

This invention provides durable, low-ice-adhesion coatings with excellent ice-adhesion reduction. Some variations provide a low-ice-adhesion composition comprising a composite material containing at least a first-material phase and a second-material phase that are nanophase-separated on a length scale from 10 nanometers to less than 100 nanometers, wherein the first-material phase and the second-material phase further are microphase-separated on a length scale from 0.1 microns to 100 microns. The larger length scale of separation is driven by an emulsion process, which provides microphase separation that is in addition to classic molecular-level phase separation. The composite material has a glass-transition temperature above 80 C. The coatings may be characterized by an AMIL Centrifuge Ice Adhesion Reduction Factor up to 100 or more. These coatings are useful for aerospace surfaces and many other applications.

This invention provides durable, low-ice-adhesion coatings with excellent ice-adhesion reduction. Some variations provide a low-ice-adhesion composition comprising a composite material containing at least a first-material phase and a second-material phase that are nanophase-separated on a length scale from 10 nanometers to less than 100 nanometers, wherein the first-material phase and the second-material phase further are microphase-separated on a length scale from 0.1 microns to 100 microns. The larger length scale of separation is driven by an emulsion process, which provides microphase separation that is in addition to classic molecular-level phase separation. The composite material has a glass-transition temperature above 80 C. The coatings may be characterized by an AMIL Centrifuge Ice Adhesion Reduction Factor up to 100 or more. These coatings are useful for aerospace surfaces and many other applications.

A gasket material comprising a crosslinked fluororubber layer having a micro-hardness of 5 to 25 formed on a metal plate using a fluororubber composition comprising 30 to 70 parts by weight of carbon black having a CTAB specific surface area of 3 to 34 m.sup.2/g, and 5 to 15 parts by weight of hydrated amorphous silicon dioxide having a BET specific surface area of 35 to 220 m.sup.2/g, based on 100 parts by weight of fluororubber, wherein the total amount of carbon black and hydrated amorphous silicon dioxide is 80 parts by weight or less.