Copolymers of one or more halogenated olefins and one or more halogenated co-monomers selected from the group consisting of halogenated alkenyl ethers, halogenated alkenyl esters, and halogenated (meth)acrylates are useful in various end-use applications wherein the presence of halogen (e.g., fluorine) in the copolymer imparts one or more desirable properties, as compared to analogous copolymers not containing halogen.

A process for preparing a crosslinked fluoropolymer film, including the successive steps of: (1) formulating an ink containing: (a) the product of the reaction of triethylamine with at least one fluorinated copolymer obtained by radical copolymerization of monomers including: (i) vinylidene fluoride (VDF), (ii) trifluoroethylene (TrFE), (iii) at least one chlorinated monomer of formula —CXCl═CX.sub.1X.sub.2 where X, X.sub.1 and X.sub.2 independently denote H, F or CF.sub.3, wherein at most one of X, X.sub.1 and X.sub.2 denotes CF.sub.3; (b) at least one crosslinking agent; (c) at least one photoinitiator; and (d) at least one organic solvent; (2) applying said ink in film form to a substrate; and (3) UV-irradiating said film. Also, the film capable of being obtained according to this process, and also to the uses thereof, in particular in the manufacture of (opto)electronic devices and more particularly in the manufacture of a gate dielectric layer in a field-effect transistor.

A molded product having a surface that is to be in contact with a coolant, the surface being formed of a crosslinked product of an amorphous fluorine-containing elastomer having a glass transition temperature of 25 C. or less, the fluorine-containing elastomer being a copolymer of: vinylidene fluoride; a fluorine-containing monomer represented by formula (1) below:

CHX.sup.aCX.sup.bRf(1)

wherein one of X.sup.a and X.sup.b is H, the other thereof is F, and Rf is a linear or branched fluoroalkyl group having 1 to 12 carbon atoms; and another monomer copolymerizable therewith, wherein a molar ratio of units of the vinylidene fluoride to units of the fluorine-containing monomer is 87/13 to 20/80, and units of the other monomer account for 0 to 50 mol % based on all monomer units.

A molded product having a surface that is to be in contact with a coolant, the surface being formed of a crosslinked product of an amorphous fluorine-containing elastomer having a glass transition temperature of 25 C. or less, the fluorine-containing elastomer being a copolymer of: vinylidene fluoride; a fluorine-containing monomer represented by formula (1) below:

CHX.sup.aCX.sup.bRf(1)

wherein one of X.sup.a and X.sup.b is H, the other thereof is F, and Rf is a linear or branched fluoroalkyl group having 1 to 12 carbon atoms; and another monomer copolymerizable therewith, wherein a molar ratio of units of the vinylidene fluoride to units of the fluorine-containing monomer is 87/13 to 20/80, and units of the other monomer account for 0 to 50 mol % based on all monomer units.

The present invention relates to a fluorine-containing diene compound represented by the following formula I, and to a polymer thereof. In the formula, each of R.sup.1 to R.sup.7 is independently a hydrogen atom, a chlorine atom, a fluorine atom, or an alkyl group having a carbon number of 1 to 5 which may be substituted by a fluorine atom, k is 0 or 1, and at least one of R.sup.1 to R.sup.7 is a hydrogen atom.

##STR00001##

The present invention relates to a fluorine-containing diene compound represented by the following formula I, and to a polymer thereof. In the formula, each of R.sup.1 to R.sup.7 is independently a hydrogen atom, a chlorine atom, a fluorine atom, or an alkyl group having a carbon number of 1 to 5 which may be substituted by a fluorine atom, k is 0 or 1, and at least one of R.sup.1 to R.sup.7 is a hydrogen atom.

##STR00001##

Copolymers of one or more halogenated olefins and one or more halogenated co-monomers selected from the group consisting of halogenated alkenyl ethers, halogenated alkenyl esters, and halogenated (meth)acrylates are useful in various end-use applications wherein the presence of halogen (e.g., fluorine) in the copolymer imparts one or more desirable properties, as compared to analogous copolymers not containing halogen.

The present invention is a fluorine-containing copolymer including (A) a fluoroolefin in an amount of 15 to 85 mol % of all constituent monomers; (B) a specific organosilicon compound in an amount of 0.001 to 10 mol % of all the constituent monomers; (C) one or more monomers selected from vinyl ethers, vinyl esters, methacrylic esters and acrylic esters, the one or more monomers not having a curing reactive group and having an aliphatic saturated hydrocarbon group with 1 to 20 carbons, a glass transition temperature of a homopolymer of the monomer being lower than 0 C., in an amount of 5 to 40 mol % of all the constituent monomers; and (D) one or more monomers selected from vinyl ethers, vinyl esters, allyl ethers, methacrylic esters and acrylic esters, and having a curing reactive group, in an amount of 1 to 25 mol % of all the constituent monomers, wherein the fluorine-containing copolymer has a glass transition temperature of 30 C. to 20 C., a number average molecular weight of 2.010.sup.4 to 7.010.sup.4, and a weight average molecular weight of 1.010.sup.5 to 3.010.sup.5.

The present invention is a fluorine-containing copolymer including (A) a fluoroolefin in an amount of 15 to 85 mol % of all constituent monomers; (B) a specific organosilicon compound in an amount of 0.001 to 10 mol % of all the constituent monomers; (C) one or more monomers selected from vinyl ethers, vinyl esters, methacrylic esters and acrylic esters, the one or more monomers not having a curing reactive group and having an aliphatic saturated hydrocarbon group with 1 to 20 carbons, a glass transition temperature of a homopolymer of the monomer being lower than 0 C., in an amount of 5 to 40 mol % of all the constituent monomers; and (D) one or more monomers selected from vinyl ethers, vinyl esters, allyl ethers, methacrylic esters and acrylic esters, and having a curing reactive group, in an amount of 1 to 25 mol % of all the constituent monomers, wherein the fluorine-containing copolymer has a glass transition temperature of 30 C. to 20 C., a number average molecular weight of 2.010.sup.4 to 7.010.sup.4, and a weight average molecular weight of 1.010.sup.5 to 3.010.sup.5.

A process for preparing a crosslinked fluoropolymer film, including the successive steps of: (1) formulating an ink containing: (a) the product of the reaction of triethylamine with at least one fluorinated copolymer obtained by radical copolymerization of monomers including: (i) vinylidene fluoride (VDF), (ii) trifluoroethylene (TrFE), (iii) at least one chlorinated monomer of formula CXClCX.sub.1X.sub.2 where X, X.sub.1 and X.sub.2 independently denote H, F or CF.sub.3, wherein at most one of X, X.sub.1 and X.sub.2 denotes CF.sub.3; (b) at least one crosslinking agent; (c) at least one photoinitiator; and (d) at least one organic solvent; (2) applying said ink in film form to a substrate; and (3) UV-irradiating said film. Also, the film capable of being obtained according to this process, and also to the uses thereof, in particular in the manufacture of (opto)electronic devices and more particularly in the manufacture of a gate dielectric layer in a field-effect transistor.